added golangci-linting, refactor, simplified error msgs and fixed some error handling

Fixed issue that when a container is stopped or network=host, it will be excluded.

.github/workflows/docker-image.yml

@@ -1,21 +1,128 @@
 name: Docker Image CI
 
 on:
-  push:
-    tags:
-      - "*"
-jobs:
-  build_and_push:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up Docker Build and Push
-        id: docker_build_push
-        uses: GlueOps/github-actions-build-push-containers@v0.3.7
-        with:
-          tags: ${{ github.ref_name }}
+    push:
+        tags: ["*"]
 
-      - name: Tag as latest
-        if: startsWith(github.ref, 'refs/tags/') && !contains(github.ref_name, '-')
-        run: |
-          docker tag ghcr.io/${{ github.repository }}:${{ github.ref_name }} ghcr.io/${{ github.repository }}:latest
-          docker push ghcr.io/${{ github.repository }}:latest
+env:
+    REGISTRY: ghcr.io
+    IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+    build:
+        name: Build multi-platform Docker image
+        runs-on: ubuntu-22.04
+
+        permissions:
+            contents: read
+            packages: write
+            id-token: write
+            attestations: write
+
+        strategy:
+            fail-fast: false
+            matrix:
+                platform:
+                    - linux/amd64
+                    # - linux/arm/v6
+                    # - linux/arm/v7
+                    - linux/arm64
+        steps:
+            - name: Prepare
+              run: |
+                  platform=${{ matrix.platform }}
+                  echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
+            - name: Docker meta
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+            - name: Set up QEMU
+              uses: docker/setup-qemu-action@v3
+
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
+            - name: Login to registry
+              uses: docker/login-action@v3
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            - name: Build and push by digest
+              id: build
+              uses: docker/build-push-action@v6
+              with:
+                  platforms: ${{ matrix.platform }}
+                  labels: ${{ steps.meta.outputs.labels }}
+                  outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+                  cache-from: type=gha
+                  cache-to: type=gha,mode=max
+                  build-args: |
+                      VERSION=${{ github.ref_name }}
+
+            - name: Generate artifact attestation
+              uses: actions/attest-build-provenance@v1
+              with:
+                  subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+                  subject-digest: ${{ steps.build.outputs.digest }}
+                  push-to-registry: true
+
+            - name: Export digest
+              run: |
+                  mkdir -p /tmp/digests
+                  digest="${{ steps.build.outputs.digest }}"
+                  touch "/tmp/digests/${digest#sha256:}"
+
+            - name: Upload digest
+              uses: actions/upload-artifact@v4
+              with:
+                  name: digests-${{ env.PLATFORM_PAIR }}
+                  path: /tmp/digests/*
+                  if-no-files-found: error
+                  retention-days: 1
+    merge:
+        runs-on: ubuntu-22.04
+        needs:
+            - build
+        permissions:
+            contents: read
+            packages: write
+            id-token: write
+        steps:
+            - name: Download digests
+              uses: actions/download-artifact@v4
+              with:
+                  path: /tmp/digests
+                  pattern: digests-*
+                  merge-multiple: true
+
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
+            - name: Docker meta
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+            - name: Login to registry
+              uses: docker/login-action@v3
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            - name: Create manifest list and push
+              id: push
+              working-directory: /tmp/digests
+              run: |
+                  docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+                    $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)
+
+            - name: Inspect image
+              run: |
+                  docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}

.gitignore

@@ -1,10 +1,10 @@
 compose.yml
+*.compose.yml
 
 config*/
 certs*/
 bin/
-
-templates/codemirror/
+error_pages/
 
 logs/
 log/
@@ -13,6 +13,12 @@ log/
 
 go.work.sum
 
-!src/**/
+!cmd/**/
+!internal/**/
 
-todo.md
+todo.md
+
+.*.swp
+.aider*
+mtrace.json
+.env

.gitlab-ci.yml

@@ -11,5 +11,5 @@ build-image:
     - echo $CI_REGISTRY_PASSWORD | docker login -u $CI_REGISTRY_USER $CI_REGISTRY --password-stdin
   script:
     - echo building $CI_REGISTRY_IMAGE
-    - docker build --pull -t $CI_REGISTRY_IMAGE .
-    - docker push $CI_REGISTRY_IMAGE
+    - docker build --no-cache --build-arg VERSION=$CI_COMMIT_REF_NAME -t $CI_REGISTRY_IMAGE .
+    - docker push $CI_REGISTRY_IMAGE

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "frontend"]
-	path = frontend
-	url = https://github.com/yusing/go-proxy-frontend

.golangci.yml

@@ -0,0 +1,136 @@
+run:
+  timeout: 10m
+
+linters-settings:
+  govet:
+    enable-all: true
+    disable:
+      - shadow
+      - fieldalignment
+  gocyclo:
+    min-complexity: 14
+  goconst:
+    min-len: 3
+    min-occurrences: 4
+  misspell:
+    locale: US
+  funlen:
+    lines: -1
+    statements: 120
+  forbidigo:
+    forbid:
+      - ^print(ln)?$
+  godox:
+    keywords:
+      - FIXME
+  tagalign:
+    align: false
+    sort: true
+    order:
+      - description
+      - json
+      - toml
+      - yaml
+      - yml
+      - label
+      - label-slice-as-struct
+      - file
+      - kv
+      - export
+  stylecheck:
+    dot-import-whitelist:
+      - github.com/yusing/go-proxy/internal/utils/testing # go tests only
+      - github.com/yusing/go-proxy/internal/api/v1/utils # api only
+  revive:
+    rules:
+      - name: struct-tag
+      - name: blank-imports
+      - name: context-as-argument
+      - name: context-keys-type
+      - name: error-return
+      - name: error-strings
+      - name: error-naming
+      - name: exported
+        disabled: true
+      - name: if-return
+      - name: increment-decrement
+      - name: var-naming
+      - name: var-declaration
+      - name: package-comments
+        disabled: true
+      - name: range
+      - name: receiver-naming
+      - name: time-naming
+      - name: unexported-return
+      - name: indent-error-flow
+      - name: errorf
+      - name: empty-block
+      - name: superfluous-else
+      - name: unused-parameter
+        disabled: true
+      - name: unreachable-code
+      - name: redefines-builtin-id
+  gomoddirectives:
+    replace-allow-list:
+      - github.com/abbot/go-http-auth
+      - github.com/gorilla/mux
+      - github.com/mailgun/minheap
+      - github.com/mailgun/multibuf
+      - github.com/jaguilar/vt100
+      - github.com/cucumber/godog
+      - github.com/http-wasm/http-wasm-host-go
+  testifylint:
+    disable:
+      - suite-dont-use-pkg
+      - require-error
+      - go-require
+  staticcheck:
+    checks:
+      - all
+      - -SA1019
+  errcheck:
+    exclude-functions:
+      - fmt.Fprintln
+linters:
+  enable-all: true
+  disable:
+    - execinquery # deprecated
+    - gomnd # deprecated
+    - sqlclosecheck # not relevant (SQL)
+    - rowserrcheck # not relevant (SQL)
+    - cyclop # duplicate of gocyclo
+    - depguard # Not relevant
+    - nakedret # Too strict
+    - lll # Not relevant
+    - gocyclo # FIXME must be fixed
+    - gocognit # Too strict
+    - nestif # Too many false-positive.
+    - prealloc # Too many false-positive.
+    - makezero # Not relevant
+    - dupl # Too strict
+    - gosec # Too strict
+    - gochecknoinits
+    - gochecknoglobals
+    - wsl # Too strict
+    - nlreturn # Not relevant
+    - mnd # Too strict
+    - testpackage # Too strict
+    - tparallel # Not relevant
+    - paralleltest # Not relevant
+    - exhaustive # Not relevant
+    - exhaustruct # Not relevant
+    - err113 # Too strict
+    - wrapcheck # Too strict
+    - noctx # Too strict
+    - bodyclose # too many false-positive
+    - forcetypeassert # Too strict
+    - tagliatelle # Too strict
+    - varnamelen # Not relevant
+    - nilnil # Not relevant
+    - ireturn # Not relevant
+    - contextcheck # too many false-positive
+    - containedctx # too many false-positive
+    - maintidx # kind of duplicate of gocyclo
+    - nonamedreturns # Too strict
+    - gosmopolitan # not relevant
+    - exportloopref # Not relevant since go1.22

.trunk/.gitignore

@@ -0,0 +1,9 @@
+*out
+*logs
+*actions
+*notifications
+*tools
+plugins
+user_trunk.yaml
+user.yaml
+tmp

.trunk/trunk.yaml

@@ -0,0 +1,41 @@
+# This file controls the behavior of Trunk: https://docs.trunk.io/cli
+# To learn more about the format of this file, see https://docs.trunk.io/reference/trunk-yaml
+version: 0.1
+cli:
+  version: 1.22.6
+# Trunk provides extensibility via plugins. (https://docs.trunk.io/plugins)
+plugins:
+  sources:
+    - id: trunk
+      ref: v1.6.3
+      uri: https://github.com/trunk-io/plugins
+# Many linters and tools depend on runtimes - configure them here. (https://docs.trunk.io/runtimes)
+runtimes:
+  enabled:
+    - node@18.12.1
+    - python@3.10.8
+    - go@1.23.2
+# This is the section where you manage your linters. (https://docs.trunk.io/check/configuration)
+lint:
+  enabled:
+    - hadolint@2.12.0
+    - actionlint@1.7.3
+    - checkov@3.2.257
+    - git-diff-check
+    - gofmt@1.20.4
+    - golangci-lint@1.61.0
+    - markdownlint@0.42.0
+    - osv-scanner@1.9.0
+    - oxipng@9.1.2
+    - prettier@3.3.3
+    - shellcheck@0.10.0
+    - shfmt@3.6.0
+    - trufflehog@3.82.7
+    - yamllint@1.35.1
+actions:
+  disabled:
+    - trunk-announce
+    - trunk-check-pre-push
+    - trunk-fmt-pre-commit
+  enabled:
+    - trunk-upgrade-available

.vscode/settings.example.json

@@ -5,9 +5,7 @@
       "config.yml"
     ],
     "https://github.com/yusing/go-proxy/raw/main/schema/providers.schema.json": [
-      "providers.example.yml",
-      "*.providers.yml",
-      "providers.yml"
+      "providers.example.yml"
     ]
   }
-}
+}

Dockerfile

@@ -1,22 +1,51 @@
-FROM golang:1.23.1-alpine AS builder
-COPY src /src
-ENV GOCACHE=/root/.cache/go-build
+# Stage 1: Builder
+FROM golang:1.23.2-alpine AS builder
+RUN apk add --no-cache tzdata make
+
 WORKDIR /src
+
+# Only copy go.mod and go.sum initially for better caching
+COPY go.mod go.sum /src/
+
+# Utilize build cache
+RUN --mount=type=cache,target="/go/pkg/mod" \
+    go mod download -x
+
+ENV GOCACHE=/root/.cache/go-build
+
+ARG VERSION
+ENV VERSION=${VERSION}
+
+COPY scripts /src/scripts
+COPY Makefile /src/
+
 RUN --mount=type=cache,target="/go/pkg/mod" \
     --mount=type=cache,target="/root/.cache/go-build" \
-    go mod download && \
-    CGO_ENABLED=0 GOOS=linux go build -pgo=auto -o go-proxy github.com/yusing/go-proxy
+    --mount=type=bind,src=cmd,dst=/src/cmd \
+    --mount=type=bind,src=internal,dst=/src/internal \
+    --mount=type=bind,src=pkg,dst=/src/pkg \
+    make build && \
+    mkdir -p /app/error_pages /app/certs && \
+    mv bin/go-proxy /app/go-proxy
 
-FROM alpine:3.20
+# Stage 2: Final image
+FROM scratch
 
 LABEL maintainer="yusing@6uo.me"
+LABEL proxy.exclude=1
+
+# copy timezone data
+COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
 
-RUN apk add --no-cache tzdata
 # copy binary
-COPY --from=builder /src/go-proxy /app/
-COPY schema/ /app/schema
+COPY --from=builder /app /app
+
+# copy schema directory
+COPY schema/ /app/schema/
+
+# copy certs
+COPY --from=builder /etc/ssl/certs /etc/ssl/certs
 
-RUN chmod +x /app/go-proxy
 ENV DOCKER_HOST=unix:///var/run/docker.sock
 ENV GOPROXY_DEBUG=0
 
@@ -25,4 +54,5 @@ EXPOSE 8888
 EXPOSE 443
 
 WORKDIR /app
-CMD ["/app/go-proxy"]
+
+CMD ["/app/go-proxy"]

Makefile

@@ -1,18 +1,19 @@
-.PHONY: all build up quick-restart restart logs get udp-server
+VERSION ?= $(shell git describe --tags --abbrev=0)
+BUILD_FLAGS ?= -s -w -X github.com/yusing/go-proxy/pkg.version=${VERSION}
+export VERSION
+export BUILD_FLAGS
+export CGO_ENABLED = 0
+export GOOS = linux
 
-all: build quick-restart logs
+.PHONY: all setup build test up restart logs get debug run archive repush rapid-crash debug-list-containers
 
-setup:
-	mkdir -p config certs
-	[ -f config/config.yml ] || cp config.example.yml config/config.yml
-	[ -f config/providers.yml ] || touch config/providers.yml
+all: debug
 
 build:
-	mkdir -p bin
-	CGO_ENABLED=0 GOOS=linux go build -pgo=auto -o bin/go-proxy github.com/yusing/go-proxy
+	scripts/build.sh
 
 test:
-	go test ./src/...
+	GOPROXY_TEST=1 go test ./internal/...
 
 up:
 	docker compose up -d
@@ -24,11 +25,20 @@ logs:
 	docker compose logs -f
 
 get:
-	cd src && go get -u && go mod tidy && cd ..
+	go get -u ./cmd && go mod tidy
 
 debug:
 	make build && sudo GOPROXY_DEBUG=1 bin/go-proxy
 
+mtrace:
+	bin/go-proxy debug-ls-mtrace > mtrace.json
+
+run-test:
+	make build && sudo GOPROXY_TEST=1 bin/go-proxy
+
+run:
+	make build && sudo bin/go-proxy
+
 archive:
 	git archive HEAD -o ../go-proxy-$$(date +"%Y%m%d%H%M").zip
 
@@ -44,4 +54,8 @@ rapid-crash:
 	sudo docker rm -f test_crash
 
 debug-list-containers:
-	bash -c 'echo -e "GET /containers/json HTTP/1.0\r\n" | sudo netcat -U /var/run/docker.sock | tail -n +9 | jq'
+	bash -c 'echo -e "GET /containers/json HTTP/1.0\r\n" | sudo netcat -U /var/run/docker.sock | tail -n +9 | jq'
+
+ci-test:
+	mkdir -p /tmp/artifacts
+	act -n --artifact-server-path /tmp/artifacts -s GITHUB_TOKEN="$$(gh auth token)"

README.md

@@ -5,10 +5,15 @@
 [![Security Rating](https://sonarcloud.io/api/project_badges/measure?project=yusing_go-proxy&metric=security_rating)](https://sonarcloud.io/summary/new_code?id=yusing_go-proxy)
 [![Maintainability Rating](https://sonarcloud.io/api/project_badges/measure?project=yusing_go-proxy&metric=sqale_rating)](https://sonarcloud.io/summary/new_code?id=yusing_go-proxy)
 [![Vulnerabilities](https://sonarcloud.io/api/project_badges/measure?project=yusing_go-proxy&metric=vulnerabilities)](https://sonarcloud.io/summary/new_code?id=yusing_go-proxy)
+[![](https://dcbadge.limes.pink/api/server/umReR62nRd)](https://discord.gg/umReR62nRd)
 
 [繁體中文文檔請看此](README_CHT.md)
 
-A lightweight, easy-to-use, and [performant](docs/benchmark_result.md) reverse proxy with a web UI.
+A lightweight, easy-to-use, and [performant](https://github.com/yusing/go-proxy/wiki/Benchmarks) reverse proxy with a Web UI and dashboard.
+
+![Screenshot](screenshots/webui.png)
+
+_Join our [Discord](https://discord.gg/umReR62nRd) for help and discussions_
 
 ## Table of content
 
@@ -16,30 +21,31 @@ A lightweight, easy-to-use, and [performant](docs/benchmark_result.md) reverse p
 
 - [go-proxy](#go-proxy)
   - [Table of content](#table-of-content)
-  - [Key Points](#key-points)
+  - [Key Features](#key-features)
   - [Getting Started](#getting-started)
     - [Setup](#setup)
-    - [Commands line arguments](#commands-line-arguments)
-    - [Environment variables](#environment-variables)
     - [Use JSON Schema in VSCode](#use-json-schema-in-vscode)
-    - [Config File](#config-file)
-    - [Provider File](#provider-file)
-  - [Known issues](#known-issues)
+  - [Screenshots](#screenshots)
+    - [idlesleeper](#idlesleeper)
   - [Build it yourself](#build-it-yourself)
 
-## Key Points
+## Key Features
 
-- Easy to use
-  - Effortless configuration
-  - Error messages is clear and detailed, easy troubleshooting
-- Auto certificate obtaining and renewal (See [Supported DNS Challenge Providers](docs/dns_providers.md))
-- Auto configuration for docker containers
-- Auto hot-reload on container state / config file changes
-- Stop containers on idle, wake it up on traffic _(optional)_
-- HTTP(s) reserve proxy
-- TCP and UDP port forwarding
-- Web UI for configuration and monitoring (See [screenshots](https://github.com/yusing/go-proxy-frontend?tab=readme-ov-file#screenshots))
-- Written in **[Go](https://go.dev)**
+-   Easy to use
+    -   Effortless configuration
+    -   Simple multi-node setup
+    -   Error messages is clear and detailed, easy troubleshooting
+-   Auto SSL cert management (See [Supported DNS-01 Challenge Providers](https://github.com/yusing/go-proxy/wiki/Supported-DNS%E2%80%9001-Providers)) 
+-   Auto configuration for docker containers
+-   Auto hot-reload on container state / config file changes
+-   **idlesleeper**: stop containers on idle, wake it up on traffic _(optional, see [screenshots](#idlesleeper))_
+-   HTTP(s) reserve proxy
+-   [HTTP middleware support](https://github.com/yusing/go-proxy/wiki/Middlewares)
+-   [Custom error pages support](https://github.com/yusing/go-proxy/wiki/Middlewares#custom-error-pages)
+-   TCP and UDP port forwarding
+-   **Web UI with App dashboard**
+-   Supports linux/amd64, linux/arm64
+-   Written in **[Go](https://go.dev)**
 
 [🔼Back to top](#table-of-content)
 
@@ -47,86 +53,48 @@ A lightweight, easy-to-use, and [performant](docs/benchmark_result.md) reverse p
 
 ### Setup
 
-1. Setup DNS Records, e.g.
+1.  Pull docker image 
+    
+    ```shell
+    docker pull ghcr.io/yusing/go-proxy:latest
+    ```
 
-   - A Record: `*.y.z` -> `10.0.10.1`
-   - AAAA Record: `*.y.z` -> `::ffff:a00:a01`
+2.  Create new directory, `cd` into it, then run setup
 
-2. Setup `go-proxy` [See here](docs/docker.md)
+    ```shell
+    docker run --rm -v .:/setup ghcr.io/yusing/go-proxy /app/go-proxy setup
+    ```
 
-3. Setup `docker-socket-proxy` (see [example](docs/docker_socket_proxy.md) other machine that is running docker (if any)
+3.  Setup DNS Records point to machine which runs `go-proxy`, e.g.
 
-4. Configure `go-proxy`
-   - with text editor (e.g. Visual Studio Code)
-   - or with web config editor via `http://gp.y.z`
+    -   A Record: `*.y.z` -> `10.0.10.1`
+    -   AAAA Record: `*.y.z` -> `::ffff:a00:a01`
+
+4.  Setup `docker-socket-proxy` other docker nodes _(if any)_ (see [Multi docker nodes setup](https://github.com/yusing/go-proxy/wiki/Configurations#multi-docker-nodes-setup)) and then them inside `config.yml`
+
+5.  Run go-proxy `docker compose up -d` 
+    then list all routes to see if further configurations are needed:
+    `docker exec go-proxy /app/go-proxy ls-routes`
+
+6.  You may now do some extra configuration
+    -   With text editor (e.g. Visual Studio Code)
+    -   With Web UI via `http://localhost:3000` or `https://gp.y.z`
+    -   For more info, [See Wiki]([wiki](https://github.com/yusing/go-proxy/wiki))
 
 [🔼Back to top](#table-of-content)
 
-### Commands line arguments
-
-| Argument    | Description                      | Example                    |
-| ----------- | -------------------------------- | -------------------------- |
-| empty       | start proxy server               |                            |
-| `validate`  | validate config and exit         |                            |
-| `reload`    | trigger a force reload of config |                            |
-| `ls-config` | list config and exit             | `go-proxy ls-config \| jq` |
-| `ls-route`  | list proxy entries and exit      | `go-proxy ls-route \| jq`  |
-
-**run with `docker exec <container_name> /app/go-proxy <command>`**
-
-### Environment variables
-
-| Environment Variable           | Description                                 | Default          | Values        |
-| ------------------------------ | ------------------------------------------- | ---------------- | ------------- |
-| `GOPROXY_NO_SCHEMA_VALIDATION` | disable schema validation                   | `false`          | boolean       |
-| `GOPROXY_DEBUG`                | enable debug behaviors                      | `false`          | boolean       |
-| `GOPROXY_HTTP_ADDR`            | http server listening address               | `:80`            | `[host]:port` |
-| `GOPROXY_HTTPS_ADDR`           | https server listening address (if enabled) | `:443`           | `[host]:port` |
-| `GOPROXY_API_ADDR`             | api server listening address                | `127.0.0.1:8888` | `[host]:port` |
-
 ### Use JSON Schema in VSCode
 
 Copy [`.vscode/settings.example.json`](.vscode/settings.example.json) to `.vscode/settings.json` and modify it to fit your needs
 
 [🔼Back to top](#table-of-content)
 
-### Config File
+## Screenshots
 
-See [config.example.yml](config.example.yml) for more
+### idlesleeper
 
-```yaml
-# autocert configuration
-autocert:
-  email: # ACME Email
-  domains: # a list of domains for cert registration
-  provider: # DNS Challenge provider
-  options: # provider specific options
-    - ...
-# reverse proxy providers configuration
-providers:
-  include:
-    - providers.yml
-    - other_file_1.yml
-    - ...
-  docker:
-    local: $DOCKER_HOST
-    remote-1: tcp://10.0.2.1:2375
-    remote-2: ssh://root:1234@10.0.2.2
-```
+![idlesleeper](screenshots/idlesleeper.webp)
 
-[🔼Back to top](#table-of-content)
-
-### Provider File
-
-See [Fields](docs/docker.md#fields)
-
-See [providers.example.yml](providers.example.yml) for examples
-
-[🔼Back to top](#table-of-content)
-
-## Known issues
-
-- `autocert` config is not hot-reloadable
 
 [🔼Back to top](#table-of-content)
 

README_CHT.md

@@ -5,8 +5,9 @@
 [![Security Rating](https://sonarcloud.io/api/project_badges/measure?project=yusing_go-proxy&metric=security_rating)](https://sonarcloud.io/summary/new_code?id=yusing_go-proxy)
 [![Maintainability Rating](https://sonarcloud.io/api/project_badges/measure?project=yusing_go-proxy&metric=sqale_rating)](https://sonarcloud.io/summary/new_code?id=yusing_go-proxy)
 [![Vulnerabilities](https://sonarcloud.io/api/project_badges/measure?project=yusing_go-proxy&metric=vulnerabilities)](https://sonarcloud.io/summary/new_code?id=yusing_go-proxy)
+[![](https://dcbadge.limes.pink/api/server/umReR62nRd)](https://discord.gg/umReR62nRd)
 
-一個輕量化、易用且[高效](docs/benchmark_result.md)的反向代理和端口轉發工具
+一個輕量化、易用且[高效]([docs/benchmark_result.md](https://github.com/yusing/go-proxy/wiki/Benchmarks)))的反向代理和端口轉發工具
 
 ## 目錄
 
@@ -20,24 +21,27 @@
     - [命令行參數](#命令行參數)
     - [環境變量](#環境變量)
     - [VSCode 中使用 JSON Schema](#vscode-中使用-json-schema)
-    - [配置文件](#配置文件)
-    - [透過文件配置](#透過文件配置)
-  - [已知問題](#已知問題)
+  - [展示](#展示)
+    - [idlesleeper](#idlesleeper)
   - [源碼編譯](#源碼編譯)
 
 ## 重點
 
-- 易用
-  - 不需花費太多時間就能輕鬆配置
-  - 除錯簡單
-- 自動處理 HTTPS 證書（參見[可用的 DNS 供應商](docs/dns_providers.md)）
-- 透過 Docker 容器自動配置
-- 容器狀態變更時自動熱重載
-- 容器閒置時自動暫停/停止，入站時自動喚醒
-- HTTP(s)反向代理
-- TCP/UDP 端口轉發
-- 用於配置和監控的前端 Web 面板（[截圖](https://github.com/yusing/go-proxy-frontend?tab=readme-ov-file#screenshots)）
-- 使用 **[Go](https://go.dev)** 編寫
+-   易用
+    -   不需花費太多時間就能輕鬆配置
+    -   支持多個docker節點
+    -   除錯簡單
+-   自動配置 SSL 證書（參見[可用的 DNS 供應商](https://github.com/yusing/go-proxy/wiki/Supported-DNS%E2%80%9001-Providers)）
+-   透過 Docker 容器自動配置
+-   容器狀態變更時自動熱重載
+-   **idlesleeper** 容器閒置時自動暫停/停止，入站時自動喚醒 (可選, 參見 [展示](#idlesleeper))
+-   HTTP(s) 反向代理
+-   [HTTP middleware](https://github.com/yusing/go-proxy/wiki/Middlewares)
+-   [自訂 error pages](https://github.com/yusing/go-proxy/wiki/Middlewares#custom-error-pages)
+-   TCP/UDP 端口轉發
+-   Web 面板 (內置App dashboard)
+-   支持 linux/amd64、linux/arm64 平台
+-   使用 **[Go](https://go.dev)** 編寫
 
 [🔼 返回頂部](#目錄)
 
@@ -45,30 +49,46 @@
 
 ### 安裝
 
-1. 設置 DNS 記錄，例如：
+1. 抓取Docker鏡像
 
-   - A 記錄: `*.y.z` -> `10.0.10.1`
-   - AAAA 記錄: `*.y.z` -> `::ffff:a00:a01`
+    ```shell
+    docker pull ghcr.io/yusing/go-proxy:latest
+    ```
 
-2. 安裝 `go-proxy` [參見這裡](docs/docker.md)
+2. 建立新的目錄，並切換到該目錄，並執行
+   
+   ```shell
+    docker run --rm -v .:/setup ghcr.io/yusing/go-proxy /app/go-proxy setup
+    ```
 
-3. 配置 `go-proxy`
-   - 使用文本編輯器 (推薦 Visual Studio Code [參見 VSCode 使用 schema](#vscode-中使用-json-schema))
-   - 或通過 `http://gp.y.z` 使用網頁配置編輯器
+3. 設置 DNS 記錄，例如：
+
+    - A 記錄: `*.y.z` -> `10.0.10.1`
+    - AAAA 記錄: `*.y.z` -> `::ffff:a00:a01`
+
+4. 配置 `docker-socket-proxy` 其他 Docker 節點（如有） (參見 [範例](docs/docker_socket_proxy.md)) 然後加到 `config.yml` 中
+
+5. 大功告成，你可以做一些額外的配置
+    - 使用文本編輯器 (推薦 Visual Studio Code [參見 VSCode 使用 schema](#vscode-中使用-json-schema))
+    - 或通過 `http://localhost:3000` 使用網頁配置編輯器
+    - 詳情請參閱 [docker.md](docs/docker.md)
 
 [🔼 返回頂部](#目錄)
 
 ### 命令行參數
 
-| 參數        | 描述           | 示例                       |
-| ----------- | -------------- | -------------------------- |
-| 空          | 啟動代理服務器 |                            |
-| `validate`  | 驗證配置並退出 |                            |
-| `reload`    | 強制刷新配置   |                            |
-| `ls-config` | 列出配置並退出 | `go-proxy ls-config \| jq` |
-| `ls-route`  | 列出路由並退出 | `go-proxy ls-route \| jq`  |
+| 參數                      | 描述                                                                                  | 示例                                |
+| ------------------------- | ------------------------------------------------------------------------------------- | ----------------------------------- |
+| 空                        | 啟動代理服務器                                                                        |                                     |
+| `validate`                | 驗證配置並退出                                                                        |                                     |
+| `reload`                  | 強制刷新配置                                                                          |                                     |
+| `ls-config`               | 列出配置並退出                                                                        | `go-proxy ls-config \| jq`          |
+| `ls-route`                | 列出路由並退出                                                                        | `go-proxy ls-route \| jq`           |
+| `go-proxy ls-route \| jq` |
+| `ls-icons`                | 列出 [dashboard-icons](https://github.com/walkxcode/dashboard-icons/tree/main) 並退出 | `go-proxy ls-icons \| grep adguard` |
+| `debug-ls-mtrace`         | 列出middleware追蹤 **(僅限於 debug 模式)**                                            | `go-proxy debug-ls-mtrace \| jq`    |
 
-**使用 `docker exec <容器名稱> /app/go-proxy <參數>` 運行**
+**使用 `docker exec go-proxy /app/go-proxy <參數>` 運行**
 
 ### 環境變量
 
@@ -86,43 +106,12 @@
 
 [🔼 返回頂部](#目錄)
 
-### 配置文件
 
-參見 [config.example.yml](config.example.yml) 了解更多
+## 展示
 
-```yaml
-# autocert 配置
-autocert:
-  email: # ACME 電子郵件
-  domains: # 域名列表
-  provider: # DNS 供應商
-  options: # 供應商個別配置
-    - ...
-# 配置文件 / docker
-providers:
-  include:
-    - providers.yml
-    - other_file_1.yml
-    - ...
-  docker:
-    local: $DOCKER_HOST
-    remote-1: tcp://10.0.2.1:2375
-    remote-2: ssh://root:1234@10.0.2.2
-```
+### idlesleeper
 
-[🔼 返回頂部](#目錄)
-
-### 透過文件配置
-
-參見 [Fields](docs/docker.md#fields)
-
-參見範例 [providers.example.yml](providers.example.yml)
-
-[🔼 返回頂部](#目錄)
-
-## 已知問題
-
-- `autocert` 配置不能熱重載
+![idlesleeper](screenshots/idlesleeper.webp)
 
 [🔼 返回頂部](#目錄)
 

cmd/main.go

@@ -11,25 +11,33 @@ import (
 	"reflect"
 	"runtime"
 	"strings"
-	"sync"
 	"syscall"
 	"time"
 
 	"github.com/sirupsen/logrus"
-	"github.com/yusing/go-proxy/api"
-	apiUtils "github.com/yusing/go-proxy/api/v1/utils"
-	"github.com/yusing/go-proxy/common"
-	"github.com/yusing/go-proxy/config"
-	"github.com/yusing/go-proxy/docker"
-	"github.com/yusing/go-proxy/docker/idlewatcher"
-	E "github.com/yusing/go-proxy/error"
-	R "github.com/yusing/go-proxy/route"
-	"github.com/yusing/go-proxy/server"
-	F "github.com/yusing/go-proxy/utils/functional"
+	"github.com/yusing/go-proxy/internal"
+	"github.com/yusing/go-proxy/internal/api"
+	"github.com/yusing/go-proxy/internal/api/v1/query"
+	"github.com/yusing/go-proxy/internal/common"
+	"github.com/yusing/go-proxy/internal/config"
+	"github.com/yusing/go-proxy/internal/docker"
+	"github.com/yusing/go-proxy/internal/docker/idlewatcher"
+	E "github.com/yusing/go-proxy/internal/error"
+	"github.com/yusing/go-proxy/internal/net/http/middleware"
+	R "github.com/yusing/go-proxy/internal/route"
+	"github.com/yusing/go-proxy/internal/server"
+	F "github.com/yusing/go-proxy/internal/utils/functional"
+	"github.com/yusing/go-proxy/pkg"
 )
 
 func main() {
 	args := common.GetArgs()
+
+	if args.Command == common.CommandSetup {
+		internal.Setup()
+		return
+	}
+
 	l := logrus.WithField("module", "main")
 	onShutdown := F.NewSlice[func()]()
 
@@ -41,15 +49,16 @@ func main() {
 		logrus.SetOutput(io.Discard)
 	} else {
 		logrus.SetFormatter(&logrus.TextFormatter{
-			DisableSorting:         true,
-			DisableLevelTruncation: true,
-			FullTimestamp:          true,
-			TimestampFormat:        "01-02 15:04:05",
+			DisableSorting:  true,
+			FullTimestamp:   true,
+			ForceColors:     true,
+			TimestampFormat: "01-02 15:04:05",
 		})
+		logrus.Infof("go-proxy version %s", pkg.GetVersion())
 	}
 
 	if args.Command == common.CommandReload {
-		if err := apiUtils.ReloadServer(); err.HasError() {
+		if err := query.ReloadServer(); err != nil {
 			log.Fatal(err)
 		}
 		log.Print("ok")
@@ -69,17 +78,37 @@ func main() {
 		return
 	}
 
-	cfg, err := config.Load()
-	if err.IsFatal() {
-		log.Fatal(err)
+	for _, dir := range common.RequiredDirectories {
+		prepareDirectory(dir)
 	}
 
+	middleware.LoadComposeFiles()
+
+	if err := config.Load(); err != nil {
+		logrus.Warn(err)
+	}
+	cfg := config.GetInstance()
+
 	switch args.Command {
 	case common.CommandListConfigs:
 		printJSON(cfg.Value())
 		return
 	case common.CommandListRoutes:
-		printJSON(cfg.RoutesByAlias())
+		routes, err := query.ListRoutes()
+		if err != nil {
+			log.Printf("failed to connect to api server: %s", err)
+			log.Printf("falling back to config file")
+			printJSON(cfg.RoutesByAlias())
+		} else {
+			printJSON(routes)
+		}
+		return
+	case common.CommandListIcons:
+		icons, err := internal.ListAvailableIcons()
+		if err != nil {
+			log.Fatal(err)
+		}
+		printJSON(icons)
 		return
 	case common.CommandDebugListEntries:
 		printJSON(cfg.DumpEntries())
@@ -87,14 +116,15 @@ func main() {
 	case common.CommandDebugListProviders:
 		printJSON(cfg.DumpProviders())
 		return
+	case common.CommandDebugListMTrace:
+		trace, err := query.ListMiddlewareTraces()
+		if err != nil {
+			log.Fatal(err)
+		}
+		printJSON(trace)
 	}
 
 	cfg.StartProxyProviders()
-
-	if err.HasError() {
-		l.Warn(err)
-	}
-
 	cfg.WatchChanges()
 
 	onShutdown.Add(docker.CloseAllClients)
@@ -106,16 +136,11 @@ func main() {
 	signal.Notify(sig, syscall.SIGHUP)
 
 	autocert := cfg.GetAutoCertProvider()
-
 	if autocert != nil {
 		ctx, cancel := context.WithCancel(context.Background())
-		if err = autocert.Setup(ctx); err != nil && err.IsWarning() {
-			cancel()
-			l.Warn(err)
-		} else if err.IsFatal() {
+		onShutdown.Add(cancel)
+		if err := autocert.Setup(ctx); err != nil {
 			l.Fatal(err)
-		} else {
-			onShutdown.Add(cancel)
 		}
 	} else {
 		l.Info("autocert not configured")
@@ -151,19 +176,15 @@ func main() {
 	// grafully shutdown
 	logrus.Info("shutting down")
 	done := make(chan struct{}, 1)
+	currentIdx := 0
 
-	var wg sync.WaitGroup
-	wg.Add(onShutdown.Size())
-	onShutdown.ForEach(func(f func()) {
-		go func() {
+	go func() {
+		onShutdown.ForEach(func(f func()) {
 			l.Debugf("waiting for %s to complete...", funcName(f))
 			f()
+			currentIdx++
 			l.Debugf("%s done", funcName(f))
-			wg.Done()
-		}()
-	})
-	go func() {
-		wg.Wait()
+		})
 		close(done)
 	}()
 
@@ -173,9 +194,17 @@ func main() {
 		logrus.Info("shutdown complete")
 	case <-timeout:
 		logrus.Info("timeout waiting for shutdown")
-		onShutdown.ForEach(func(f func()) {
-			l.Warnf("%s() is still running", funcName(f))
-		})
+		for i := currentIdx; i < onShutdown.Size(); i++ {
+			l.Warnf("%s() is still running", funcName(onShutdown.Get(i)))
+		}
+	}
+}
+
+func prepareDirectory(dir string) {
+	if _, err := os.Stat(dir); os.IsNotExist(err) {
+		if err = os.MkdirAll(dir, 0755); err != nil {
+			logrus.Fatalf("failed to create directory %s: %v", dir, err)
+		}
 	}
 }
 
@@ -185,8 +214,8 @@ func funcName(f func()) string {
 }
 
 func printJSON(obj any) {
-	j, err := E.Check(json.Marshal(obj))
-	if err.HasError() {
+	j, err := E.Check(json.MarshalIndent(obj, "", "  "))
+	if err != nil {
 		logrus.Fatal(err)
 	}
 	rawLogger := log.New(os.Stdout, "", 0)

compose.example.yml

@@ -1,33 +1,45 @@
 services:
-  frontend:
-    image: ghcr.io/yusing/go-proxy-frontend:latest
-    container_name: go-proxy-frontend
-    restart: unless-stopped
-    network_mode: host
-    labels:
-      - proxy.aliases=gp
-      - proxy.gp.port=3000
-    depends_on:
-      - app
-  app:
-    image: ghcr.io/yusing/go-proxy:latest
-    container_name: go-proxy
-    restart: always
-    network_mode: host
-    environment:
-      # (Optional) change this to your timezone to get correct log timestamp
-      TZ: ETC/UTC
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
-      - ./config:/app/config
+    frontend:
+        image: ghcr.io/yusing/go-proxy-frontend:latest
+        container_name: go-proxy-frontend
+        restart: unless-stopped
+        network_mode: host
+        depends_on:
+            - app
+        # if you also want to proxy the WebUI and access it via gp.y.z
+        # labels:
+        #   - proxy.aliases=gp
+        #   - proxy.gp.port=3000
 
-      # (Optional) choose one of below to enable https
-      # 1. use existing certificate
-      # if your cert is not named `cert.crt` change `cert_path` in `config/config.yml`
-      # if your cert key is not named `priv.key` change `key_path` in `config/config.yml`
+        # Make sure the value is same as `GOPROXY_API_ADDR` below (if you have changed it)
+        #
+        # environment:
+        #     GOPROXY_API_ADDR: 127.0.0.1:8888
+    app:
+        image: ghcr.io/yusing/go-proxy:latest
+        container_name: go-proxy
+        restart: always
+        network_mode: host
+        environment:
+            # (Optional) change this to your timezone to get correct log timestamp
+            TZ: ETC/UTC
 
-      # - /path/to/certs:/app/certs
+            # Change these if you need
+            #
+            # GOPROXY_HTTP_ADDR: :80
+            # GOPROXY_HTTPS_ADDR: :443
+            # GOPROXY_API_ADDR: 127.0.0.1:8888
+        volumes:
+            - /var/run/docker.sock:/var/run/docker.sock
+            - ./config:/app/config
 
-      # 2. use autocert, certs will be stored in ./certs (or other path you specify)
+            # (Optional) choose one of below to enable https
+            # 1. use existing certificate
+            # if your cert is not named `cert.crt` change `cert_path` in `config/config.yml`
+            # if your cert key is not named `priv.key` change `key_path` in `config/config.yml`
 
-      # - ./certs:/app/certs
+            # - /path/to/certs:/app/certs
+
+            # 2. use autocert, certs will be stored in ./certs (or other path you specify)
+
+            # - ./certs:/app/certs

config.example.yml

@@ -1,37 +1,69 @@
 # Autocert (choose one below and uncomment to enable)
-
+#
 # 1. use existing cert
+#
 # autocert:
 #   provider: local
-#   cert_path: certs/cert.crt # optional, uncomment only if you need to change it
-#   key_path: certs/priv.key # optional, uncomment only if you need to change it
-
+#
+#   cert_path: certs/cert.crt         # optional, uncomment only if you need to change it
+#   key_path: certs/priv.key          # optional, uncomment only if you need to change it
+#
 # 2. cloudflare
+#
 # autocert:
 #   provider: cloudflare
-#   email: # ACME Email
-#   domains: # a list of domains for cert registration
-#     - x.y.z
+#   email: abc@gmail.com                            # ACME Email
+#   domains:                                        # a list of domains for cert registration
+#     - "*.y.z"                                     # remember to use double quotes to surround wildcard domain
 #   options:
-#     - auth_token: c1234565789-abcdefghijklmnopqrst # your zone API token
-
-# 3. other providers, check readme for more
+#     auth_token: c1234565789-abcdefghijklmnopqrst  # your zone API token
+#
+# 3. other providers, check docs/dns_providers.md for more
 
 providers:
-  include:
-    - providers.yml # config/providers.yml
-    # add some more below if you want
-    # - file1.yml # config/file_1.yml
-    # - file2.yml
+  # include files are standalone yaml files under `config/` directory
+  #
+  # include:
+  #   - file1.yml
+  #   - file2.yml
+
   docker:
-    # for value format, see https://docs.docker.com/reference/cli/dockerd/
-    # $DOCKER_HOST implies unix:///var/run/docker.sock by default
+    # $DOCKER_HOST implies environment variable `DOCKER_HOST` or unix:///var/run/docker.sock by default
     local: $DOCKER_HOST
+    # explicit only mode
+    # only containers with explicit aliases will be proxied
+    # add "!" after provider name to enable explicit only mode
+    #
+    # local!: $DOCKER_HOST
+    #
     # add more docker providers if needed
+    # for value format, see https://docs.docker.com/reference/cli/dockerd/
+    #
     # remote-1: tcp://10.0.2.1:2375
     # remote-2: ssh://root:1234@10.0.2.2
+# if match_domains not defined
+# any host = alias+[any domain] will match
+# i.e. https://app1.y.z       will match alias app1 for any domain y.z
+#  but https://app1.node1.y.z will only match alias "app.node1"
+#
+# if match_domains defined
+# only host = alias+[one of match_domains] will match
+# i.e. match_domains = [node1.my.app, my.site]
+# https://app1.my.app, https://app1.my.net, etc. will not match even if app1 exists
+# only https://*.node1.my.app and https://*.my.site will match
+#
+#
+# match_domains:
+#   - my.site
+#   - node1.my.app
 
-# Fixed options (optional, non hot-reloadable)
+# Below are fixed options (non hot-reloadable)
 
+# timeout for shutdown (in seconds)
+#
 # timeout_shutdown: 5
+
+# global setting redirect http requests to https (if https available, otherwise this will be ignored)
+# proxy.<alias>.middlewares.redirect_http will override this
+#
 # redirect_to_https: false

docs/add_dns_provider.md

@@ -1,41 +0,0 @@
-# Adding provider support
-
-## **CloudDNS** as an example
-
-1. Fork this repo, modify [autocert.go](../src/go-proxy/autocert.go#L305)
-
-   ```go
-   var providersGenMap = map[string]ProviderGenerator{
-     "cloudflare": providerGenerator(cloudflare.NewDefaultConfig, cloudflare.NewDNSProviderConfig),
-     // add here, e.g.
-     "clouddns": providerGenerator(clouddns.NewDefaultConfig, clouddns.NewDNSProviderConfig),
-   }
-   ```
-
-2. Go to [https://go-acme.github.io/lego/dns/clouddns](https://go-acme.github.io/lego/dns/clouddns/) and check for required config
-
-3. Build `go-proxy` with `make build`
-
-4. Set required config in `config.yml` `autocert` -> `options` section
-
-   ```shell
-   # From https://go-acme.github.io/lego/dns/clouddns/
-   CLOUDDNS_CLIENT_ID=bLsdFAks23429841238feb177a572aX \
-   CLOUDDNS_EMAIL=you@example.com \
-   CLOUDDNS_PASSWORD=b9841238feb177a84330f \
-   lego --email you@example.com --dns clouddns --domains my.example.org run
-   ```
-
-   Should turn into:
-
-   ```yaml
-   autocert:
-     ...
-     options:
-       client_id: bLsdFAks23429841238feb177a572aX
-       email: you@example.com
-       password: b9841238feb177a84330f
-   ```
-
-5. Run with `GOPROXY_NO_SCHEMA_VALIDATION=1` and test if it works
-6. Commit and create pull request

docs/benchmark_result.md

@@ -1,104 +0,0 @@
-# Benchmarks
-
-Benchmarked with `wrk` and `traefik/whoami`'s `/bench` endpoint
-
-## Remote benchmark
-
-- Direct connection
-
-  ```shell
-  root@yusing-pc:~# wrk -t 10 -c 200 -d 10s -H "Host: bench.6uo.me" --latency http://10.0.100.3:8003/bench
-  Running 10s test @ http://10.0.100.3:8003/bench
-    10 threads and 200 connections
-    Thread Stats   Avg      Stdev     Max   +/- Stdev
-      Latency    94.75ms  199.92ms   1.68s    91.27%
-      Req/Sec     4.24k     1.79k   18.79k    72.13%
-    Latency Distribution
-      50%    1.14ms
-      75%  120.23ms
-      90%  245.63ms
-      99%    1.03s
-    423444 requests in 10.10s, 50.88MB read
-    Socket errors: connect 0, read 0, write 0, timeout 29
-  Requests/sec:  41926.32
-  Transfer/sec:      5.04MB
-  ```
-
-- With reverse proxy
-
-  ```shell
-  root@yusing-pc:~# wrk -t 10 -c 200 -d 10s -H "Host: bench.6uo.me" --latency http://10.0.1.7/bench
-  Running 10s test @ http://10.0.1.7/bench
-    10 threads and 200 connections
-    Thread Stats   Avg      Stdev     Max   +/- Stdev
-      Latency    79.35ms  169.79ms   1.69s    92.55%
-      Req/Sec     4.27k     1.90k   19.61k    75.81%
-    Latency Distribution
-      50%    1.12ms
-      75%  105.66ms
-      90%  200.22ms
-      99%  814.59ms
-    409836 requests in 10.10s, 49.25MB read
-    Socket errors: connect 0, read 0, write 0, timeout 18
-  Requests/sec:  40581.61
-  Transfer/sec:      4.88MB
-  ```
-
-## Local benchmark (client running wrk and `go-proxy` server are under same proxmox host but different LXCs)
-
-- Direct connection
-
-  ```shell
-  root@http-benchmark-client:~# wrk -t 10 -c 200 -d 10s --latency http://10.0.100.1/bench
-  Running 10s test @ http://10.0.100.1/bench
-    10 threads and 200 connections
-    Thread Stats   Avg      Stdev     Max   +/- Stdev
-      Latency   434.08us  539.35us   8.76ms   85.28%
-      Req/Sec    67.71k     6.31k   87.21k    71.20%
-    Latency Distribution
-      50%  153.00us
-      75%  646.00us
-      90%    1.18ms
-      99%    2.38ms
-    6739591 requests in 10.01s, 809.85MB read
-  Requests/sec: 673608.15
-  Transfer/sec:     80.94MB
-  ```
-
-- With `go-proxy` reverse proxy
-
-  ```shell
-  root@http-benchmark-client:~# wrk -t 10 -c 200 -d 10s -H "Host: bench.6uo.me" --latency http://10.0.1.7/bench
-  Running 10s test @ http://10.0.1.7/bench
-    10 threads and 200 connections
-    Thread Stats   Avg      Stdev     Max   +/- Stdev
-      Latency     1.23ms    0.96ms  11.43ms   72.09%
-      Req/Sec    17.48k     1.76k   21.48k    70.20%
-    Latency Distribution
-      50%    0.98ms
-      75%    1.76ms
-      90%    2.54ms
-      99%    4.24ms
-    1739079 requests in 10.01s, 208.97MB read
-  Requests/sec: 173779.44
-  Transfer/sec:     20.88MB
-  ```
-
-- With `traefik-v3`
-
-  ```shell
-  root@traefik-benchmark:~# wrk -t10 -c200 -d10s -H "Host: benchmark.whoami" --latency http://127.0.0.1:8000/bench
-  Running 10s test @ http://127.0.0.1:8000/bench
-    10 threads and 200 connections
-    Thread Stats   Avg      Stdev     Max   +/- Stdev
-      Latency     2.81ms   10.36ms 180.26ms   98.57%
-      Req/Sec    11.35k     1.74k   13.76k    85.54%
-    Latency Distribution
-      50%    1.59ms
-      75%    2.27ms
-      90%    3.17ms
-      99%   37.91ms
-    1125723 requests in 10.01s, 109.50MB read
-  Requests/sec: 112499.59
-  Transfer/sec:     10.94MB
-  ```

docs/dns_providers.md

@@ -1,53 +0,0 @@
-# Supported DNS Providers
-
-<!-- TOC -->
-
-- [Supported DNS Providers](#supported-dns-providers)
-  - [Cloudflare](#cloudflare)
-  - [CloudDNS](#clouddns)
-  - [DuckDNS](#duckdns)
-  - [OVHCloud](#ovhcloud)
-  - [Implement other DNS providers](#implement-other-dns-providers)
-
-## Cloudflare
-
-`auth_token` your zone API token
-
-Follow [this guide](https://cloudkul.com/blog/automcatic-renew-and-generate-ssl-on-your-website-using-lego-client/) to create a new token with `Zone.DNS` read and edit permissions
-
-## CloudDNS
-
-- `client_id`
-
-- `email`
-
-- `password`
-
-## DuckDNS
-
-- `token`: DuckDNS Token
-
-Tested by [earvingad](https://github.com/earvingad)
-
-## OVHCloud
-
-_Note, `application_key` and `oauth2_config` **CANNOT** be used together_
-
-- `api_endpoint`: Endpoint URL, or one of
-  - `ovh-eu`,
-  - `ovh-ca`,
-  - `ovh-us`,
-  - `kimsufi-eu`,
-  - `kimsufi-ca`,
-  - `soyoustart-eu`,
-  - `soyoustart-ca`
-- `application_secret`
-- `application_key`
-- `consumer_key`
-- `oauth2_config`: Client ID and Client Secret
-  - `client_id`
-  - `client_secret`
-
-## Implement other DNS providers
-
-See [add_dns_provider.md](docs/add_dns_provider.md)

docs/docker.md

@@ -1,315 +0,0 @@
-# Docker compose guide
-
-## Table of content
-
-<!-- TOC -->
-
-- [Docker compose guide](#docker-compose-guide)
-  - [Table of content](#table-of-content)
-  - [Setup](#setup)
-  - [Labels](#labels)
-    - [Syntax](#syntax)
-    - [Fields](#fields)
-      - [Key-value mapping example](#key-value-mapping-example)
-      - [List example](#list-example)
-  - [Troubleshooting](#troubleshooting)
-  - [Docker compose examples](#docker-compose-examples)
-    - [Services URLs for above examples](#services-urls-for-above-examples)
-
-## Setup
-
-1.  Install `wget` if not already
-
-    - Ubuntu based: `sudo apt install -y wget`
-    - Fedora based: `sudo yum install -y wget`
-    - Arch based: `sudo pacman -Sy wget`
-
-2.  Run setup script
-
-    `bash <(wget -qO- https://github.com/yusing/go-proxy/raw/main/setup-docker.sh)`
-
-    It will setup folder structure and required config files
-
-3.  Verify folder structure and then `cd go-proxy`
-
-    ```plain
-    go-proxy
-    ├── certs
-    ├── compose.yml
-    └── config
-        ├── config.yml
-        └── providers.yml
-    ```
-
-4.  Enable HTTPs _(optional)_
-
-    Mount a folder (to store obtained certs) or (containing existing cert)
-
-    ```yaml
-    services:
-      go-proxy:
-        ...
-        volumes:
-          - ./certs:/app/certs
-    ```
-
-    To use **autocert**, complete that section in `config.yml`, e.g.
-
-    ```yaml
-    autocert:
-      email: john.doe@x.y.z # ACME Email
-      domains: # a list of domains for cert registration
-        - x.y.z
-      provider: cloudflare
-      options:
-        - auth_token: c1234565789-abcdefghijklmnopqrst # your zone API token
-    ```
-
-    To use **existing certificate**, set path for cert and key in `config.yml`, e.g.
-
-    ```yaml
-    autocert:
-      cert_path: /app/certs/cert.crt
-      key_path: /app/certs/priv.key
-    ```
-
-5.  Modify `compose.yml` to fit your needs
-
-6.  Run `docker compose up -d` to start the container
-
-7.  Navigate to Web panel `http://gp.yourdomain.com` or use **Visual Studio Code (provides schema check)** to edit proxy config
-
-[🔼Back to top](#table-of-content)
-
-## Labels
-
-### Syntax
-
-| Label                    | Description                                                           | Default              | Accepted values                                                           |
-| ------------------------ | --------------------------------------------------------------------- | -------------------- | ------------------------------------------------------------------------- |
-| `proxy.aliases`          | comma separated aliases for subdomain and label matching              | `container_name`     | any                                                                       |
-| `proxy.exclude`          | to be excluded from `go-proxy`                                        | false                | boolean                                                                   |
-| `proxy.idle_timeout`     | time for idle (no traffic) before put it into sleep **(http/s only)** | empty **(disabled)** | `number[unit]...`, e.g. `1m30s`                                           |
-| `proxy.wake_timeout`     | time to wait for container to start before responding a loading page  | empty                | `number[unit]...`                                                         |
-| `proxy.stop_method`      | method to stop after `idle_timeout`                                   | `stop`               | `stop`, `pause`, `kill`                                                   |
-| `proxy.stop_timeout`     | time to wait for stop command                                         | `10s`                | `number[unit]...`                                                         |
-| `proxy.stop_signal`      | signal sent to container for `stop` and `kill` methods                | docker's default     | `SIGINT`, `SIGTERM`, `SIGHUP`, `SIGQUIT` and those without **SIG** prefix |
-| `proxy.<alias>.<field>`  | set field for specific alias                                          | N/A                  | N/A                                                                       |
-| `proxy.$<index>.<field>` | set field for specific alias at index (starting from **1**)           | N/A                  | N/A                                                                       |
-| `proxy.*.<field>`        | set field for all aliases                                             | N/A                  | N/A                                                                       |
-
-### Fields
-
-| Field                 | Description                                                                                    | Default                                                                          | Allowed Values / Syntax                                                                                                                                 |
-| --------------------- | ---------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `scheme`              | proxy protocol                                                                                 | <ul><li>`http` for numeric port</li><li>`tcp` for `x:y` port</li></ul>           | `http`, `https`, `tcp`, `udp`                                                                                                                           |
-| `host`                | proxy host                                                                                     | <ul><li>Docker: docker client IP / hostname </li><li>File: `localhost`</li></ul> | IP address, hostname                                                                                                                                    |
-| `port`                | proxy port **(http/s)**                                                                        | first port in `ports:`                                                           | number in range of `1 - 65535`                                                                                                                          |
-| `port` **(required)** | proxy port **(tcp/udp)**                                                                       | N/A                                                                              | `x:y` <br><ul><li>x: port for `go-proxy` to listen on</li><li>y: port or [_service name_](../src/common/constants.go#L55) of target container</li></ul> |
-| `no_tls_verify`       | whether skip tls verify **(https only)**                                                       | `false`                                                                          | boolean                                                                                                                                                 |
-| `path_patterns`       | proxy path patterns **(http/s only)**<br> only requests that matched a pattern will be proxied | empty **(proxy all requests)**                                                   | yaml style list[<sup>1</sup>](#list-example) of path patterns ([syntax](https://pkg.go.dev/net/http#hdr-Patterns-ServeMux))                             |
-| `set_headers`         | header to set **(http/s only)**                                                                | empty                                                                            | yaml style key-value mapping[<sup>2</sup>](#key-value-mapping-example) of header-value pairs                                                            |
-| `hide_headers`        | header to hide **(http/s only)**                                                               | empty                                                                            | yaml style list[<sup>1</sup>](#list-example) of headers                                                                                                 |
-
-[🔼Back to top](#table-of-content)
-
-#### Key-value mapping example
-
-Docker Compose
-
-```yaml
-services:
-  nginx:
-    ...
-    labels:
-      # values from duplicated header keys will be combined
-      proxy.nginx.set_headers: | # remember to add the '|'
-        X-Custom-Header1: value1, value2
-        X-Custom-Header2: value3
-        X-Custom-Header2: value4
-      # X-Custom-Header2 will be "value3, value4"
-```
-
-File Provider
-
-```yaml
-service_a:
-  host: service_a.internal
-  set_headers:
-    # do not duplicate header keys, as it is not allowed in YAML
-    X-Custom-Header1: value1, value2
-    X-Custom-Header2: value3
-```
-
-[🔼Back to top](#table-of-content)
-
-#### List example
-
-Docker Compose
-
-```yaml
-services:
-  nginx:
-    ...
-    labels:
-      proxy.nginx.path_patterns: | # remember to add the '|'
-        - GET /
-        - POST /auth
-      proxy.nginx.hide_headers: | # remember to add the '|'
-        - X-Custom-Header1
-        - X-Custom-Header2
-```
-
-File Provider
-
-```yaml
-service_a:
-  host: service_a.internal
-  path_patterns:
-    - GET /
-    - POST /auth
-  hide_headers:
-    - X-Custom-Header1
-    - X-Custom-Header2
-```
-
-[🔼Back to top](#table-of-content)
-
-## Troubleshooting
-
-- Container not showing up in proxies list
-
-  Please check that either `ports` or label `proxy.<alias>.port` is declared, e.g.
-
-  ```yaml
-  services:
-    nginx-1: # Option 1
-      ...
-      ports:
-        - 80
-    nginx-2: # Option 2
-      ...
-      container_name: nginx-2
-      network_mode: host
-      labels:
-        proxy.nginx-2.port: 80
-  ```
-
-- Firewall issues
-
-  If you are using `ufw` with vpn that drop all inbound traffic except vpn, run below:
-
-  `sudo ufw allow from 172.16.0.0/16 to 100.64.0.0/10`
-
-  Explaination:
-
-  Docker network is usually `172.16.0.0/16`
-
-  Tailscale is used as an example, `100.64.0.0/10` will be the CIDR
-
-  You can also list CIDRs of all docker bridge networks by:
-
-  `docker network inspect $(docker network ls | awk '$3 == "bridge" { print $1}') | jq -r '.[] | .Name + " " + .IPAM.Config[0].Subnet' -`
-
-[🔼Back to top](#table-of-content)
-
-## Docker compose examples
-
-More examples in [here](examples/)
-
-```yaml
-volumes:
-  adg-work:
-  adg-conf:
-  mc-data:
-  palworld:
-  nginx:
-services:
-  adg:
-    image: adguard/adguardhome
-    restart: unless-stopped
-    labels:
-      - proxy.aliases=adg,adg-dns,adg-setup
-      - proxy.$1.port=80
-      - proxy.$2.scheme=udp
-      - proxy.$2.port=20000:dns
-      - proxy.$3.port=3000
-    volumes:
-      - adg-work:/opt/adguardhome/work
-      - adg-conf:/opt/adguardhome/conf
-    ports:
-      - 80
-      - 3000
-      - 53/udp
-  mc:
-    image: itzg/minecraft-server
-    tty: true
-    stdin_open: true
-    container_name: mc
-    restart: unless-stopped
-    ports:
-      - 25565
-    labels:
-      - proxy.mc.port=20001:25565
-    environment:
-      - EULA=TRUE
-    volumes:
-      - mc-data:/data
-  palworld:
-    image: thijsvanloef/palworld-server-docker:latest
-    restart: unless-stopped
-    container_name: pal
-    stop_grace_period: 30s
-    ports:
-      - 8211/udp
-      - 27015/udp
-    labels:
-      - proxy.aliases=pal1,pal2
-      - proxy.*.scheme=udp
-      - proxy.$1.port=20002:8211
-      - proxy.$2.port=20003:27015
-    environment: ...
-    volumes:
-      - palworld:/palworld
-  nginx:
-    image: nginx
-    container_name: nginx
-    volumes:
-      - nginx:/usr/share/nginx/html
-    ports:
-      - 80
-    labels:
-      proxy.idle_timeout: 1m
-  go-proxy:
-    image: ghcr.io/yusing/go-proxy:latest
-    container_name: go-proxy
-    restart: always
-    network_mode: host
-    volumes:
-      - ./config:/app/config
-      - /var/run/docker.sock:/var/run/docker.sock
-  go-proxy-frontend:
-    image: ghcr.io/yusing/go-proxy-frontend:latest
-    container_name: go-proxy-frontend
-    restart: unless-stopped
-    network_mode: host
-    labels:
-      - proxy.aliases=gp
-      - proxy.gp.port=3000
-    depends_on:
-      - go-proxy
-```
-
-[🔼Back to top](#table-of-content)
-
-### Services URLs for above examples
-
-- `gp.yourdomain.com`: go-proxy web panel
-- `adg-setup.yourdomain.com`: adguard setup (first time setup)
-- `adg.yourdomain.com`: adguard dashboard
-- `nginx.yourdomain.com`: nginx
-- `yourdomain.com:2000`: adguard dns (udp)
-- `yourdomain.com:20001`: minecraft server
-- `yourdomain.com:20002`: palworld server
-
-[🔼Back to top](#table-of-content)

docs/docker_socket_proxy.md

@@ -1,40 +0,0 @@
-## Docker Socket Proxy
-
-For docker client on other machine, set this up, then add `name: tcp://<machine_ip>:2375` to `config.yml` under `docker` section
-
-```yml
-# compose.yml on remote machine (e.g. server1)
-docker-proxy:
-  container_name: docker-proxy
-  image: tecnativa/docker-socket-proxy
-  privileged: true
-  environment:
-    - ALLOW_START=1
-    - ALLOW_STOP=1
-    - ALLOW_RESTARTS=1
-    - CONTAINERS=1
-    - EVENTS=1
-    - PING=1
-    - POST=1
-    - VERSION=1
-  volumes:
-    - /var/run/docker.sock:/var/run/docker.sock
-  restart: always
-  ports:
-    - 2375:2375
-    # or more secure
-    - <machine_ip>:2375:2375
-```
-
-```yml
-# config.yml on go-proxy machine
-autocert:
-  ... # your config
-
-providers:
-  include:
-    ...
-  docker:
-    ...
-    server1: tcp://<machine_ip>:2375
-```

examples/microbin.yml

@@ -7,7 +7,7 @@ services:
         limits:
           memory: 256M
     env_file: .env
-    image: docker.i.sh/danielszabo99/microbin:latest
+    image: danielszabo99/microbin:latest
     ports:
       - 8080
     restart: unless-stopped

go.mod

@@ -1,23 +1,25 @@
 module github.com/yusing/go-proxy
 
-go 1.22.0
+go 1.23.2
 
 require (
+	github.com/coder/websocket v1.8.12
 	github.com/docker/cli v27.3.1+incompatible
 	github.com/docker/docker v27.3.1+incompatible
 	github.com/fsnotify/fsnotify v1.7.0
-	github.com/go-acme/lego/v4 v4.18.0
+	github.com/go-acme/lego/v4 v4.19.2
 	github.com/puzpuzpuz/xsync/v3 v3.4.0
 	github.com/santhosh-tekuri/jsonschema v1.2.4
 	github.com/sirupsen/logrus v1.9.3
-	golang.org/x/net v0.29.0
+	golang.org/x/net v0.30.0
+	golang.org/x/text v0.19.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
-	github.com/cloudflare/cloudflare-go v0.104.0 // indirect
+	github.com/cloudflare/cloudflare-go v0.107.0 // indirect
 	github.com/containerd/log v0.1.0 // indirect
 	github.com/distribution/reference v0.6.0 // indirect
 	github.com/docker/go-connections v0.5.0 // indirect
@@ -29,6 +31,7 @@ require (
 	github.com/goccy/go-json v0.10.3 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
 	github.com/miekg/dns v1.1.62 // indirect
 	github.com/moby/docker-image-spec v1.3.1 // indirect
 	github.com/moby/term v0.5.0 // indirect
@@ -37,20 +40,20 @@ require (
 	github.com/opencontainers/image-spec v1.1.0 // indirect
 	github.com/ovh/go-ovh v1.6.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/rogpeppe/go-internal v1.12.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.55.0 // indirect
 	go.opentelemetry.io/otel v1.30.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.24.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.30.0 // indirect
 	go.opentelemetry.io/otel/metric v1.30.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.24.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.30.0 // indirect
 	go.opentelemetry.io/otel/trace v1.30.0 // indirect
-	golang.org/x/crypto v0.27.0 // indirect
+	golang.org/x/crypto v0.28.0 // indirect
 	golang.org/x/mod v0.21.0 // indirect
 	golang.org/x/oauth2 v0.23.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.25.0 // indirect
-	golang.org/x/text v0.18.0 // indirect
-	golang.org/x/time v0.6.0 // indirect
-	golang.org/x/tools v0.25.0 // indirect
+	golang.org/x/sys v0.26.0 // indirect
+	golang.org/x/time v0.7.0 // indirect
+	golang.org/x/tools v0.26.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gotest.tools/v3 v3.5.1 // indirect
 )

go.sum

@@ -4,13 +4,17 @@ github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERo
 github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
 github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
 github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
-github.com/cloudflare/cloudflare-go v0.104.0 h1:R/lB0dZupaZbOgibAH/BRrkFbZ6Acn/WsKg2iX2xXuY=
-github.com/cloudflare/cloudflare-go v0.104.0/go.mod h1:pfUQ4PIG4ISI0/Mmc21Bp86UnFU0ktmPf3iTgbSL+cM=
+github.com/cloudflare/cloudflare-go v0.107.0 h1:cMDIw2tzt6TXCJyMFVyP+BPOVkIfMvcKjhMNSNvuEPc=
+github.com/cloudflare/cloudflare-go v0.107.0/go.mod h1:5cYGzVBqNTLxMYSLdVjuSs5LJL517wJDSvMPWUrzHzc=
+github.com/coder/websocket v1.8.12 h1:5bUXkEPPIbewrnkU8LTCLVaxi4N4J8ahufH2vlo4NAo=
+github.com/coder/websocket v1.8.12/go.mod h1:LNVeNrXQZfe5qhS9ALED3uA+l5pPqvwXg3CKoDBB2gs=
 github.com/containerd/log v0.1.0 h1:TCJt7ioM2cr/tfR8GPbGf9/VRAX8D2B4PjzCpfX540I=
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 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
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 github.com/distribution/reference v0.6.0 h1:0IXCQ5g4/QMHHkarYzh5l+u8T3t73zM5QvfrDyIgxBk=
 github.com/distribution/reference v0.6.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E=
 github.com/docker/cli v27.3.1+incompatible h1:qEGdFBF3Xu6SCvCYhc7CzaQTlBmqDuzxPDpigSyeKQQ=
@@ -25,8 +29,8 @@ github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2
 github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
 github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
-github.com/go-acme/lego/v4 v4.18.0 h1:2hH8KcdRBSb+p5o9VZIm61GAOXYALgILUCSs1Q+OYsk=
-github.com/go-acme/lego/v4 v4.18.0/go.mod h1:Blkg3izvXpl3zxk7WKngIuwR2I/hvYVP3vRnvgBp7m8=
+github.com/go-acme/lego/v4 v4.19.2 h1:Y8hrmMvWETdqzzkRly7m98xtPJJivWFsgWi8fcvZo+Y=
+github.com/go-acme/lego/v4 v4.19.2/go.mod h1:wtDe3dDkmV4/oI2nydpNXSJpvV10J9RCyZ6MbYxNtlQ=
 github.com/go-jose/go-jose/v4 v4.0.4 h1:VsjPI33J0SB9vQM6PLmNjoHqMQNGPiZ0rHL7Ni7Q6/E=
 github.com/go-jose/go-jose/v4 v4.0.4/go.mod h1:NKb5HO1EZccyMpiZNbdUw/14tiXNyUJh188dfnMCAfc=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
@@ -43,14 +47,16 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
 github.com/google/go-querystring v1.1.0/go.mod h1:Kcdr2DB4koayq7X8pmAG4sNG59So17icRSOU623lUBU=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 h1:Wqo399gCIufwto+VfwCSvsnfGpF/w5E9CNxSwbpD6No=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0/go.mod h1:qmOFXW2epJhM0qSnUUYpldc7gVz2KMQwJ/QYCDIa7XU=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.22.0 h1:asbCHRVmodnJTuQ3qamDwqVOIjwqUPTYmYuemVOx+Ys=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.22.0/go.mod h1:ggCgvZ2r7uOoQjOyu2Y1NhHmEPPzzuhWgcza5M1Ji1I=
 github.com/jarcoal/httpmock v1.3.0 h1:2RJ8GP0IIaWwcC9Fp2BmVi8Kog3v2Hn7VXM3fTd+nuc=
 github.com/jarcoal/httpmock v1.3.0/go.mod h1:3yb8rc4BI7TCBhFY8ng0gjuLKJNquuDNiPaZjnENuYg=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
-github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/maxatome/go-testdeep v1.12.0 h1:Ql7Go8Tg0C1D/uMMX59LAoYK7LffeJQ6X2T04nTH68g=
@@ -69,14 +75,17 @@ github.com/opencontainers/image-spec v1.1.0 h1:8SG7/vwALn54lVB/0yZ/MMwhFrPYtpEHQ
 github.com/opencontainers/image-spec v1.1.0/go.mod h1:W4s4sFTMaBeK1BQLXbG4AdM2szdn85PY75RI83NrTrM=
 github.com/ovh/go-ovh v1.6.0 h1:ixLOwxQdzYDx296sXcgS35TOPEahJkpjMGtzPadCjQI=
 github.com/ovh/go-ovh v1.6.0/go.mod h1:cTVDnl94z4tl8pP1uZ/8jlVxntjSIf09bNcQ5TJSC7c=
+github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/puzpuzpuz/xsync/v3 v3.4.0 h1:DuVBAdXuGFHv8adVXjWWZ63pJq+NRXOWVXlKDBZ+mJ4=
 github.com/puzpuzpuz/xsync/v3 v3.4.0/go.mod h1:VjzYrABPabuM4KyBh1Ftq6u8nhwY5tBPKP9jpmh0nnA=
-github.com/rogpeppe/go-internal v1.8.1 h1:geMPLpDpQOgVyCg5z5GoRwLHepNdb71NXb67XFkP+Eg=
-github.com/rogpeppe/go-internal v1.8.1/go.mod h1:JeRgkft04UBgHMgCIwADu4Pn6Mtm5d4nPKWu0nJ5d+o=
+github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
+github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
+github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/santhosh-tekuri/jsonschema v1.2.4 h1:hNhW8e7t+H1vgY+1QeEQpveR6D4+OwKPXCfD2aieJis=
 github.com/santhosh-tekuri/jsonschema v1.2.4/go.mod h1:TEAUOeZSmIxTTuHatJzrvARHiuO9LYd+cIxzgEHCQI4=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
@@ -91,23 +100,23 @@ go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.55.0 h1:ZIg3ZT/
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.55.0/go.mod h1:DQAwmETtZV00skUwgD6+0U89g80NKsJE3DCKeLLPQMI=
 go.opentelemetry.io/otel v1.30.0 h1:F2t8sK4qf1fAmY9ua4ohFS/K+FUuOPemHUIXHtktrts=
 go.opentelemetry.io/otel v1.30.0/go.mod h1:tFw4Br9b7fOS+uEao81PJjVMjW/5fvNCbpsDIXqP0pc=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.24.0 h1:t6wl9SPayj+c7lEIFgm4ooDBZVb01IhLB4InpomhRw8=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.24.0/go.mod h1:iSDOcsnSA5INXzZtwaBPrKp/lWu/V14Dd+llD0oI2EA=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.24.0 h1:Xw8U6u2f8DK2XAkGRFV7BBLENgnTGX9i4rQRxJf+/vs=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.24.0/go.mod h1:6KW1Fm6R/s6Z3PGXwSJN2K4eT6wQB3vXX6CVnYX9NmM=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.30.0 h1:lsInsfvhVIfOI6qHVyysXMNDnjO9Npvl7tlDPJFBVd4=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.30.0/go.mod h1:KQsVNh4OjgjTG0G6EiNi1jVpnaeeKsKMRwbLN+f1+8M=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.30.0 h1:umZgi92IyxfXd/l4kaDhnKgY8rnN/cZcF1LKc6I8OQ8=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.30.0/go.mod h1:4lVs6obhSVRb1EW5FhOuBTyiQhtRtAnnva9vD3yRfq8=
 go.opentelemetry.io/otel/metric v1.30.0 h1:4xNulvn9gjzo4hjg+wzIKG7iNFEaBMX00Qd4QIZs7+w=
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-go.opentelemetry.io/otel/sdk v1.24.0 h1:YMPPDNymmQN3ZgczicBY3B6sf9n62Dlj9pWD3ucgoDw=
-go.opentelemetry.io/otel/sdk v1.24.0/go.mod h1:KVrIYw6tEubO9E96HQpcmpTKDVn9gdv35HoYiQWGDFg=
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-go.opentelemetry.io/proto/otlp v1.1.0 h1:2Di21piLrCqJ3U3eXGCTPHE9R8Nh+0uglSnOyxikMeI=
-go.opentelemetry.io/proto/otlp v1.1.0/go.mod h1:GpBHCBWiqvVLDqmHZsoMM3C5ySeKTC7ej/RNTae6MdY=
+go.opentelemetry.io/proto/otlp v1.3.1 h1:TrMUixzpM0yuc/znrFTP9MMRh8trP93mkCiDVeXrui0=
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 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.27.0 h1:GXm2NjJrPaiv/h1tb2UH8QfgC/hOf/+z0p6PT8o1w7A=
-golang.org/x/crypto v0.27.0/go.mod h1:1Xngt8kV6Dvbssa53Ziq6Eqn0HqbZi5Z6R0ZpwQzt70=
+golang.org/x/crypto v0.28.0 h1:GBDwsMXVQi34v5CCYUm2jkJvu4cbtru2U4TN2PSyQnw=
+golang.org/x/crypto v0.28.0/go.mod h1:rmgy+3RHxRZMyY0jjAJShp2zgEdOqj2AO7U0pYmeQ7U=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
@@ -116,8 +125,8 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.29.0 h1:5ORfpBpCs4HzDYoodCDBbwHzdR5UrLBZ3sOnUJmFoHo=
-golang.org/x/net v0.29.0/go.mod h1:gLkgy8jTGERgjzMic6DS9+SP0ajcu6Xu3Orq/SpETg0=
+golang.org/x/net v0.30.0 h1:AcW1SDZMkb8IpzCdQUaIq2sP4sZ4zw+55h6ynffypl4=
+golang.org/x/net v0.30.0/go.mod h1:2wGyMJ5iFasEhkwi13ChkO/t1ECNC4X4eBKkVFyYFlU=
 golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs=
 golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -129,33 +138,33 @@ golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
-golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
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-golang.org/x/text v0.18.0 h1:XvMDiNzPAl0jr17s6W9lcaIhGUfUORdGCNsuLmPG224=
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-golang.org/x/time v0.6.0 h1:eTDhh4ZXt5Qf0augr54TN6suAUudPcawVZeIAPU7D4U=
-golang.org/x/time v0.6.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
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 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.25.0 h1:oFU9pkj/iJgs+0DT+VMHrx+oBKs/LJMV+Uvg78sl+fE=
-golang.org/x/tools v0.25.0/go.mod h1:/vtpO8WL1N9cQC3FN5zPqb//fRXskFHbLKk4OW1Q7rg=
+golang.org/x/tools v0.26.0 h1:v/60pFQmzmT9ExmjDv2gGIfi3OqfKoEP6I5+umXlbnQ=
+golang.org/x/tools v0.26.0/go.mod h1:TPVVj70c7JJ3WCazhD8OdXcZg/og+b9+tH/KxylGwH0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto v0.0.0-20240227224415-6ceb2ff114de h1:F6qOa9AZTYJXOUEr4jDysRDLrm4PHePlge4v4TGAlxY=
-google.golang.org/genproto/googleapis/api v0.0.0-20240311132316-a219d84964c2 h1:rIo7ocm2roD9DcFIX67Ym8icoGCKSARAiPljFhh5suQ=
-google.golang.org/genproto/googleapis/api v0.0.0-20240311132316-a219d84964c2/go.mod h1:O1cOfN1Cy6QEYr7VxtjOyP5AdAuR0aJ/MYZaaof623Y=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240318140521-94a12d6c2237 h1:NnYq6UN9ReLM9/Y01KWNOWyI5xQ9kbIms5GGJVwS/Yc=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240318140521-94a12d6c2237/go.mod h1:WtryC6hu0hhx87FDGxWCDptyssuo68sk10vYjF+T9fY=
-google.golang.org/grpc v1.63.1 h1:pNClQmvdlyNUiwFETOux/PYqfhmA7BrswEdGRnib1fA=
-google.golang.org/grpc v1.63.1/go.mod h1:WAX/8DgncnokcFUldAxq7GeB5DXHDbMF+lLvDomNkRA=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/genproto v0.0.0-20240903143218-8af14fe29dc1 h1:BulPr26Jqjnd4eYDVe+YvyR7Yc2vJGkO5/0UxD0/jZU=
+google.golang.org/genproto/googleapis/api v0.0.0-20240903143218-8af14fe29dc1 h1:hjSy6tcFQZ171igDaN5QHOw2n6vx40juYbC/x67CEhc=
+google.golang.org/genproto/googleapis/api v0.0.0-20240903143218-8af14fe29dc1/go.mod h1:qpvKtACPCQhAdu3PyQgV4l3LMXZEtft7y8QcarRsp9I=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240903143218-8af14fe29dc1 h1:pPJltXNxVzT4pK9yD8vR9X75DaWYYmLGMsEvBfFQZzQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240903143218-8af14fe29dc1/go.mod h1:UqMtugtsSgubUsoxbuAoiCXvqvErP7Gf0so0mK9tHxU=
+google.golang.org/grpc v1.66.1 h1:hO5qAXR19+/Z44hmvIM4dQFMSYX9XcWsByfoxutBpAM=
+google.golang.org/grpc v1.66.1/go.mod h1:s3/l6xSSCURdVfAnL+TqCNMyTDAGN6+lZeVxnZR128Y=
+google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

go.work

@@ -1,5 +0,0 @@
-go 1.22.0
-
-toolchain go1.23.1
-
-use ./src

internal/api/handler.go

@@ -0,0 +1,62 @@
+package api
+
+import (
+	"fmt"
+	"net/http"
+
+	v1 "github.com/yusing/go-proxy/internal/api/v1"
+	"github.com/yusing/go-proxy/internal/api/v1/errorpage"
+	. "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/common"
+	"github.com/yusing/go-proxy/internal/config"
+)
+
+type ServeMux struct{ *http.ServeMux }
+
+func NewServeMux() ServeMux {
+	return ServeMux{http.NewServeMux()}
+}
+
+func (mux ServeMux) HandleFunc(method, endpoint string, handler http.HandlerFunc) {
+	mux.ServeMux.HandleFunc(fmt.Sprintf("%s %s", method, endpoint), checkHost(handler))
+}
+
+func NewHandler(cfg *config.Config) http.Handler {
+	mux := NewServeMux()
+	mux.HandleFunc("GET", "/v1", v1.Index)
+	mux.HandleFunc("GET", "/v1/version", v1.GetVersion)
+	mux.HandleFunc("GET", "/v1/checkhealth", wrap(cfg, v1.CheckHealth))
+	mux.HandleFunc("HEAD", "/v1/checkhealth", wrap(cfg, v1.CheckHealth))
+	mux.HandleFunc("POST", "/v1/reload", wrap(cfg, v1.Reload))
+	mux.HandleFunc("GET", "/v1/list", wrap(cfg, v1.List))
+	mux.HandleFunc("GET", "/v1/list/{what}", wrap(cfg, v1.List))
+	mux.HandleFunc("GET", "/v1/file", v1.GetFileContent)
+	mux.HandleFunc("GET", "/v1/file/{filename...}", v1.GetFileContent)
+	mux.HandleFunc("POST", "/v1/file/{filename...}", v1.SetFileContent)
+	mux.HandleFunc("PUT", "/v1/file/{filename...}", v1.SetFileContent)
+	mux.HandleFunc("GET", "/v1/stats", wrap(cfg, v1.Stats))
+	mux.HandleFunc("GET", "/v1/stats/ws", wrap(cfg, v1.StatsWS))
+	mux.HandleFunc("GET", "/v1/error_page", errorpage.GetHandleFunc())
+	return mux
+}
+
+// allow only requests to API server with host matching common.APIHTTPAddr.
+func checkHost(f http.HandlerFunc) http.HandlerFunc {
+	if common.IsDebug {
+		return f
+	}
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Host != common.APIHTTPAddr {
+			Logger.Warnf("invalid request to API server with host: %s, expect %s", r.Host, common.APIHTTPAddr)
+			http.Error(w, "invalid request", http.StatusForbidden)
+			return
+		}
+		f(w, r)
+	}
+}
+
+func wrap(cfg *config.Config, f func(cfg *config.Config, w http.ResponseWriter, r *http.Request)) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		f(cfg, w, r)
+	}
+}

internal/api/v1/checkhealth.go

@@ -5,15 +5,15 @@ import (
 	"net/http"
 	"strings"
 
-	U "github.com/yusing/go-proxy/api/v1/utils"
-	"github.com/yusing/go-proxy/config"
-	R "github.com/yusing/go-proxy/route"
+	. "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/config"
+	R "github.com/yusing/go-proxy/internal/route"
 )
 
 func CheckHealth(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
 	target := r.FormValue("target")
 	if target == "" {
-		U.HandleErr(w, r, U.ErrMissingKey("target"), http.StatusBadRequest)
+		HandleErr(w, r, ErrMissingKey("target"), http.StatusBadRequest)
 		return
 	}
 
@@ -22,13 +22,13 @@ func CheckHealth(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
 
 	switch {
 	case route == nil:
-		U.HandleErr(w, r, U.ErrNotFound("target", target), http.StatusNotFound)
+		HandleErr(w, r, ErrNotFound("target", target), http.StatusNotFound)
 		return
 	case route.Type() == R.RouteTypeReverseProxy:
-		ok = U.IsSiteHealthy(route.URL().String())
+		ok = IsSiteHealthy(route.URL().String())
 	case route.Type() == R.RouteTypeStream:
 		entry := route.Entry()
-		ok = U.IsStreamHealthy(
+		ok = IsStreamHealthy(
 			strings.Split(entry.Scheme, ":")[1], // target scheme
 			fmt.Sprintf("%s:%v", entry.Host, strings.Split(entry.Port, ":")[1]),
 		)

internal/api/v1/errorpage/error_page.go

@@ -0,0 +1,90 @@
+package errorpage
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path"
+	"sync"
+
+	. "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/common"
+	U "github.com/yusing/go-proxy/internal/utils"
+	F "github.com/yusing/go-proxy/internal/utils/functional"
+	W "github.com/yusing/go-proxy/internal/watcher"
+	"github.com/yusing/go-proxy/internal/watcher/events"
+)
+
+const errPagesBasePath = common.ErrorPagesBasePath
+
+var (
+	dirWatcher     W.Watcher
+	fileContentMap = F.NewMapOf[string, []byte]()
+)
+
+var setup = sync.OnceFunc(func() {
+	dirWatcher = W.NewDirectoryWatcher(context.Background(), errPagesBasePath)
+	loadContent()
+	go watchDir()
+})
+
+func GetStaticFile(filename string) ([]byte, bool) {
+	return fileContentMap.Load(filename)
+}
+
+// try <statusCode>.html -> 404.html -> not ok.
+func GetErrorPageByStatus(statusCode int) (content []byte, ok bool) {
+	content, ok = fileContentMap.Load(fmt.Sprintf("%d.html", statusCode))
+	if !ok && statusCode != 404 {
+		return fileContentMap.Load("404.html")
+	}
+	return
+}
+
+func loadContent() {
+	files, err := U.ListFiles(errPagesBasePath, 0)
+	if err != nil {
+		Logger.Error(err)
+		return
+	}
+	for _, file := range files {
+		if fileContentMap.Has(file) {
+			continue
+		}
+		content, err := os.ReadFile(file)
+		if err != nil {
+			Logger.Errorf("failed to read error page resource %s: %s", file, err)
+			continue
+		}
+		file = path.Base(file)
+		Logger.Infof("error page resource %s loaded", file)
+		fileContentMap.Store(file, content)
+	}
+}
+
+func watchDir() {
+	eventCh, errCh := dirWatcher.Events(context.Background())
+	for {
+		select {
+		case event, ok := <-eventCh:
+			if !ok {
+				return
+			}
+			filename := event.ActorName
+			switch event.Action {
+			case events.ActionFileWritten:
+				fileContentMap.Delete(filename)
+				loadContent()
+			case events.ActionFileDeleted:
+				fileContentMap.Delete(filename)
+				Logger.Infof("error page resource %s deleted", filename)
+			case events.ActionFileRenamed:
+				Logger.Infof("error page resource %s deleted", filename)
+				fileContentMap.Delete(filename)
+				loadContent()
+			}
+		case err := <-errCh:
+			Logger.Errorf("error watching error page directory: %s", err)
+		}
+	}
+}

internal/api/v1/errorpage/http_handler.go

@@ -0,0 +1,31 @@
+package errorpage
+
+import (
+	"net/http"
+
+	. "github.com/yusing/go-proxy/internal/api/v1/utils"
+)
+
+func GetHandleFunc() http.HandlerFunc {
+	setup()
+	return serveHTTP
+}
+
+func serveHTTP(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	if r.URL.Path == "/" {
+		http.Error(w, "invalid path", http.StatusNotFound)
+		return
+	}
+	content, ok := fileContentMap.Load(r.URL.Path)
+	if !ok {
+		http.Error(w, "404 not found", http.StatusNotFound)
+		return
+	}
+	if _, err := w.Write(content); err != nil {
+		HandleErr(w, r, err)
+	}
+}

internal/api/v1/file.go

@@ -5,11 +5,13 @@ import (
 	"net/http"
 	"os"
 	"path"
+	"strings"
 
-	U "github.com/yusing/go-proxy/api/v1/utils"
-	"github.com/yusing/go-proxy/common"
-	"github.com/yusing/go-proxy/config"
-	"github.com/yusing/go-proxy/proxy/provider"
+	U "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/common"
+	"github.com/yusing/go-proxy/internal/config"
+	E "github.com/yusing/go-proxy/internal/error"
+	"github.com/yusing/go-proxy/internal/proxy/provider"
 )
 
 func GetFileContent(w http.ResponseWriter, r *http.Request) {
@@ -22,7 +24,7 @@ func GetFileContent(w http.ResponseWriter, r *http.Request) {
 		U.HandleErr(w, r, err)
 		return
 	}
-	w.Write(content)
+	U.WriteBody(w, content)
 }
 
 func SetFileContent(w http.ResponseWriter, r *http.Request) {
@@ -37,18 +39,19 @@ func SetFileContent(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	var validateErr E.NestedError
 	if filename == common.ConfigFileName {
-		err = config.Validate(content).Error()
-	} else {
-		err = provider.Validate(content).Error()
+		validateErr = config.Validate(content)
+	} else if !strings.HasPrefix(filename, path.Base(common.MiddlewareComposeBasePath)) {
+		validateErr = provider.Validate(content)
 	}
 
-	if err != nil {
-		U.HandleErr(w, r, err, http.StatusBadRequest)
+	if validateErr != nil {
+		U.RespondJSON(w, r, validateErr.JSONObject(), http.StatusBadRequest)
 		return
 	}
 
-	err = os.WriteFile(path.Join(common.ConfigBasePath, filename), content, 0644)
+	err = os.WriteFile(path.Join(common.ConfigBasePath, filename), content, 0o644)
 	if err != nil {
 		U.HandleErr(w, r, err)
 		return

internal/api/v1/health_check.go

@@ -0,0 +1,34 @@
+package v1
+
+import (
+	"net"
+	"net/http"
+
+	U "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/common"
+)
+
+func IsSiteHealthy(url string) bool {
+	// try HEAD first
+	// if HEAD is not allowed, try GET
+	resp, err := U.Head(url)
+	if resp != nil {
+		resp.Body.Close()
+	}
+	if err != nil && resp != nil && resp.StatusCode == http.StatusMethodNotAllowed {
+		_, err = U.Get(url)
+	}
+	if resp != nil {
+		resp.Body.Close()
+	}
+	return err == nil
+}
+
+func IsStreamHealthy(scheme, address string) bool {
+	conn, err := net.DialTimeout(scheme, address, common.DialTimeout)
+	if err != nil {
+		return false
+	}
+	conn.Close()
+	return true
+}

internal/api/v1/index.go

@@ -0,0 +1,11 @@
+package v1
+
+import (
+	"net/http"
+
+	. "github.com/yusing/go-proxy/internal/api/v1/utils"
+)
+
+func Index(w http.ResponseWriter, r *http.Request) {
+	WriteBody(w, []byte("API ready"))
+}

internal/api/v1/list.go

@@ -0,0 +1,87 @@
+package v1
+
+import (
+	"net/http"
+	"strings"
+
+	U "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/common"
+	"github.com/yusing/go-proxy/internal/config"
+	"github.com/yusing/go-proxy/internal/net/http/middleware"
+	"github.com/yusing/go-proxy/internal/utils"
+)
+
+const (
+	ListRoutes          = "routes"
+	ListConfigFiles     = "config_files"
+	ListMiddlewares     = "middlewares"
+	ListMiddlewareTrace = "middleware_trace"
+	ListMatchDomains    = "match_domains"
+	ListHomepageConfig  = "homepage_config"
+)
+
+func List(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
+	what := r.PathValue("what")
+	if what == "" {
+		what = ListRoutes
+	}
+
+	switch what {
+	case ListRoutes:
+		listRoutes(cfg, w, r)
+	case ListConfigFiles:
+		listConfigFiles(w, r)
+	case ListMiddlewares:
+		listMiddlewares(w, r)
+	case ListMiddlewareTrace:
+		listMiddlewareTrace(w, r)
+	case ListMatchDomains:
+		listMatchDomains(cfg, w, r)
+	case ListHomepageConfig:
+		listHomepageConfig(cfg, w, r)
+	default:
+		U.HandleErr(w, r, U.ErrInvalidKey("what"), http.StatusBadRequest)
+	}
+}
+
+func listRoutes(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
+	routes := cfg.RoutesByAlias()
+	typeFilter := r.FormValue("type")
+	if typeFilter != "" {
+		for k, v := range routes {
+			if v["type"] != typeFilter {
+				delete(routes, k)
+			}
+		}
+	}
+
+	U.RespondJSON(w, r, routes)
+}
+
+func listConfigFiles(w http.ResponseWriter, r *http.Request) {
+	files, err := utils.ListFiles(common.ConfigBasePath, 1)
+	if err != nil {
+		U.HandleErr(w, r, err)
+		return
+	}
+	for i := range files {
+		files[i] = strings.TrimPrefix(files[i], common.ConfigBasePath+"/")
+	}
+	U.RespondJSON(w, r, files)
+}
+
+func listMiddlewareTrace(w http.ResponseWriter, r *http.Request) {
+	U.RespondJSON(w, r, middleware.GetAllTrace())
+}
+
+func listMiddlewares(w http.ResponseWriter, r *http.Request) {
+	U.RespondJSON(w, r, middleware.All())
+}
+
+func listMatchDomains(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
+	U.RespondJSON(w, r, cfg.Value().MatchDomains)
+}
+
+func listHomepageConfig(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
+	U.RespondJSON(w, r, cfg.HomepageConfig())
+}

internal/api/v1/query/query.go

@@ -0,0 +1,69 @@
+package query
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+
+	v1 "github.com/yusing/go-proxy/internal/api/v1"
+	U "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/common"
+	E "github.com/yusing/go-proxy/internal/error"
+	"github.com/yusing/go-proxy/internal/net/http/middleware"
+)
+
+func ReloadServer() E.NestedError {
+	resp, err := U.Post(fmt.Sprintf("%s/v1/reload", common.APIHTTPURL), "", nil)
+	if err != nil {
+		return E.From(err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		failure := E.Failure("server reload").Extraf("status code: %v", resp.StatusCode)
+		b, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return failure.Extraf("unable to read response body: %s", err)
+		}
+		reloadErr, ok := E.FromJSON(b)
+		if ok {
+			return E.Join("reload success, but server returned error", reloadErr)
+		}
+		return failure.Extraf("unable to read response body")
+	}
+	return nil
+}
+
+func ListRoutes() (map[string]map[string]any, E.NestedError) {
+	resp, err := U.Get(fmt.Sprintf("%s/v1/list/%s", common.APIHTTPURL, v1.ListRoutes))
+	if err != nil {
+		return nil, E.From(err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return nil, E.Failure("list routes").Extraf("status code: %v", resp.StatusCode)
+	}
+	var routes map[string]map[string]any
+	err = json.NewDecoder(resp.Body).Decode(&routes)
+	if err != nil {
+		return nil, E.From(err)
+	}
+	return routes, nil
+}
+
+func ListMiddlewareTraces() (middleware.Traces, E.NestedError) {
+	resp, err := U.Get(fmt.Sprintf("%s/v1/list/%s", common.APIHTTPURL, v1.ListMiddlewareTrace))
+	if err != nil {
+		return nil, E.From(err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return nil, E.Failure("list middleware trace").Extraf("status code: %v", resp.StatusCode)
+	}
+	var traces middleware.Traces
+	err = json.NewDecoder(resp.Body).Decode(&traces)
+	if err != nil {
+		return nil, E.From(err)
+	}
+	return traces, nil
+}

internal/api/v1/reload.go

@@ -0,0 +1,16 @@
+package v1
+
+import (
+	"net/http"
+
+	U "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/config"
+)
+
+func Reload(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
+	if err := cfg.Reload(); err != nil {
+		U.RespondJSON(w, r, err.JSONObject(), http.StatusInternalServerError)
+	} else {
+		w.WriteHeader(http.StatusOK)
+	}
+}

internal/api/v1/stats.go

@@ -0,0 +1,67 @@
+package v1
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/coder/websocket"
+	"github.com/coder/websocket/wsjson"
+	U "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/internal/common"
+	"github.com/yusing/go-proxy/internal/config"
+	"github.com/yusing/go-proxy/internal/server"
+	"github.com/yusing/go-proxy/internal/utils"
+)
+
+func Stats(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
+	U.RespondJSON(w, r, getStats(cfg))
+}
+
+func StatsWS(cfg *config.Config, w http.ResponseWriter, r *http.Request) {
+	localAddresses := []string{"127.0.0.1", "10.0.*.*", "172.16.*.*", "192.168.*.*"}
+	originPats := make([]string, len(cfg.Value().MatchDomains)+len(localAddresses))
+
+	if len(originPats) == 0 {
+		U.Logger.Warnf("no match domains configured, accepting websocket request from all origins")
+		originPats = []string{"*"}
+	} else {
+		for i, domain := range cfg.Value().MatchDomains {
+			originPats[i] = "*." + domain
+		}
+		originPats = append(originPats, localAddresses...)
+	}
+	if common.IsDebug {
+		originPats = []string{"*"}
+	}
+	conn, err := websocket.Accept(w, r, &websocket.AcceptOptions{
+		OriginPatterns: originPats,
+	})
+	if err != nil {
+		U.Logger.Errorf("/stats/ws failed to upgrade websocket: %s", err)
+		return
+	}
+	/* trunk-ignore(golangci-lint/errcheck) */
+	defer conn.CloseNow()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	ticker := time.NewTicker(1 * time.Second)
+	defer ticker.Stop()
+
+	for range ticker.C {
+		stats := getStats(cfg)
+		if err := wsjson.Write(ctx, conn, stats); err != nil {
+			U.Logger.Errorf("/stats/ws failed to write JSON: %s", err)
+			return
+		}
+	}
+}
+
+func getStats(cfg *config.Config) map[string]any {
+	return map[string]any{
+		"proxies": cfg.Statistics(),
+		"uptime":  utils.FormatDuration(server.GetProxyServer().Uptime()),
+	}
+}

internal/api/v1/utils/error.go

@@ -6,12 +6,17 @@ import (
 	"net/http"
 
 	"github.com/sirupsen/logrus"
-	E "github.com/yusing/go-proxy/error"
+	E "github.com/yusing/go-proxy/internal/error"
 )
 
+var Logger = logrus.WithField("module", "api")
+
 func HandleErr(w http.ResponseWriter, r *http.Request, origErr error, code ...int) {
+	if origErr == nil {
+		return
+	}
 	err := E.From(origErr).Subjectf("%s %s", r.Method, r.URL)
-	logrus.WithField("module", "api").Error(err)
+	Logger.Error(err)
 	if len(code) > 0 {
 		http.Error(w, err.String(), code[0])
 		return

internal/api/v1/utils/http_client.go

@@ -0,0 +1,29 @@
+package utils
+
+import (
+	"crypto/tls"
+	"net"
+	"net/http"
+
+	"github.com/yusing/go-proxy/internal/common"
+)
+
+var (
+	HTTPClient = &http.Client{
+		Timeout: common.ConnectionTimeout,
+		Transport: &http.Transport{
+			Proxy:             http.ProxyFromEnvironment,
+			DisableKeepAlives: true,
+			ForceAttemptHTTP2: true,
+			DialContext: (&net.Dialer{
+				Timeout:   common.DialTimeout,
+				KeepAlive: common.KeepAlive, // this is different from DisableKeepAlives
+			}).DialContext,
+			TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+		},
+	}
+
+	Get  = HTTPClient.Get
+	Post = HTTPClient.Post
+	Head = HTTPClient.Head
+)

internal/api/v1/utils/utils.go

@@ -0,0 +1,30 @@
+package utils
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+func WriteBody(w http.ResponseWriter, body []byte) {
+	if _, err := w.Write(body); err != nil {
+		HandleErr(w, nil, err)
+	}
+}
+
+func RespondJSON(w http.ResponseWriter, r *http.Request, data any, code ...int) bool {
+	if len(code) > 0 {
+		w.WriteHeader(code[0])
+	}
+	w.Header().Set("Content-Type", "application/json")
+	j, err := json.MarshalIndent(data, "", "  ")
+	if err != nil {
+		HandleErr(w, r, err)
+		return false
+	}
+	_, err = w.Write(j)
+	if err != nil {
+		HandleErr(w, r, err)
+		return false
+	}
+	return true
+}

internal/api/v1/version.go

@@ -0,0 +1,12 @@
+package v1
+
+import (
+	"net/http"
+
+	. "github.com/yusing/go-proxy/internal/api/v1/utils"
+	"github.com/yusing/go-proxy/pkg"
+)
+
+func GetVersion(w http.ResponseWriter, r *http.Request) {
+	WriteBody(w, []byte(pkg.GetVersion()))
+}

internal/autocert/config.go

@@ -7,13 +7,14 @@ import (
 
 	"github.com/go-acme/lego/v4/certcrypto"
 	"github.com/go-acme/lego/v4/lego"
-	E "github.com/yusing/go-proxy/error"
-	M "github.com/yusing/go-proxy/models"
+	E "github.com/yusing/go-proxy/internal/error"
+
+	"github.com/yusing/go-proxy/internal/types"
 )
 
-type Config M.AutoCertConfig
+type Config types.AutoCertConfig
 
-func NewConfig(cfg *M.AutoCertConfig) *Config {
+func NewConfig(cfg *types.AutoCertConfig) *Config {
 	if cfg.CertPath == "" {
 		cfg.CertPath = CertFileDefault
 	}
@@ -32,13 +33,13 @@ func (cfg *Config) GetProvider() (provider *Provider, res E.NestedError) {
 
 	if cfg.Provider != ProviderLocal {
 		if len(cfg.Domains) == 0 {
-			b.Addf("no domains specified")
+			b.Addf("%s", "no domains specified")
 		}
 		if cfg.Provider == "" {
-			b.Addf("no provider specified")
+			b.Addf("%s", "no provider specified")
 		}
 		if cfg.Email == "" {
-			b.Addf("no email specified")
+			b.Addf("%s", "no email specified")
 		}
 		// check if provider is implemented
 		_, ok := providersGenMap[cfg.Provider]

internal/autocert/provider.go

@@ -5,6 +5,7 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"os"
+	"path"
 	"reflect"
 	"sort"
 	"time"
@@ -13,23 +14,25 @@ import (
 	"github.com/go-acme/lego/v4/challenge"
 	"github.com/go-acme/lego/v4/lego"
 	"github.com/go-acme/lego/v4/registration"
-	E "github.com/yusing/go-proxy/error"
-	M "github.com/yusing/go-proxy/models"
-	U "github.com/yusing/go-proxy/utils"
+	E "github.com/yusing/go-proxy/internal/error"
+	"github.com/yusing/go-proxy/internal/types"
+	U "github.com/yusing/go-proxy/internal/utils"
 )
 
-type Provider struct {
-	cfg     *Config
-	user    *User
-	legoCfg *lego.Config
-	client  *lego.Client
+type (
+	Provider struct {
+		cfg     *Config
+		user    *User
+		legoCfg *lego.Config
+		client  *lego.Client
 
-	tlsCert      *tls.Certificate
-	certExpiries CertExpiries
-}
+		tlsCert      *tls.Certificate
+		certExpiries CertExpiries
+	}
+	ProviderGenerator func(types.AutocertProviderOpt) (challenge.Provider, E.NestedError)
 
-type ProviderGenerator func(M.AutocertProviderOpt) (challenge.Provider, E.NestedError)
-type CertExpiries map[string]time.Time
+	CertExpiries map[string]time.Time
+)
 
 func (p *Provider) GetCert(_ *tls.ClientHelloInfo) (*tls.Certificate, error) {
 	if p.tlsCert == nil {
@@ -59,8 +62,7 @@ func (p *Provider) ObtainCert() (res E.NestedError) {
 	defer b.To(&res)
 
 	if p.cfg.Provider == ProviderLocal {
-		b.Addf("provider is set to %q", ProviderLocal).WithSeverity(E.SeverityWarning)
-		return
+		return nil
 	}
 
 	if p.client == nil {
@@ -71,11 +73,9 @@ func (p *Provider) ObtainCert() (res E.NestedError) {
 	}
 
 	if p.user.Registration == nil {
-		if err := p.loadRegistration(); err.HasError() {
-			if err := p.registerACME(); err.HasError() {
-				b.Add(E.FailWith("register ACME", err))
-				return
-			}
+		if err := p.registerACME(); err.HasError() {
+			b.Add(E.FailWith("register ACME", err))
+			return
 		}
 	}
 
@@ -89,16 +89,18 @@ func (p *Provider) ObtainCert() (res E.NestedError) {
 		b.Add(err)
 		return
 	}
-	err = p.saveCert(cert)
-	if err.HasError() {
+
+	if err = p.saveCert(cert); err.HasError() {
 		b.Add(E.FailWith("save certificate", err))
 		return
 	}
+
 	tlsCert, err := E.Check(tls.X509KeyPair(cert.Certificate, cert.PrivateKey))
 	if err.HasError() {
 		b.Add(E.FailWith("parse obtained certificate", err))
 		return
 	}
+
 	expiries, err := getCertExpiries(&tlsCert)
 	if err.HasError() {
 		b.Add(E.FailWith("get certificate expiry", err))
@@ -187,31 +189,23 @@ func (p *Provider) registerACME() E.NestedError {
 	}
 	p.user.Registration = reg
 
-	if err := p.saveRegistration(); err.HasError() {
-		logger.Warn(err)
-	}
 	return nil
 }
 
-func (p *Provider) loadRegistration() E.NestedError {
-	if p.user.Registration != nil {
-		return nil
-	}
-	reg := &registration.Resource{}
-	err := U.LoadJson(RegistrationFile, reg)
-	if err.HasError() {
-		return E.FailWith("parse registration file", err)
-	}
-	p.user.Registration = reg
-	return nil
-}
-
-func (p *Provider) saveRegistration() E.NestedError {
-	return U.SaveJson(RegistrationFile, p.user.Registration, 0o600)
-}
-
 func (p *Provider) saveCert(cert *certificate.Resource) E.NestedError {
-	err := os.WriteFile(p.cfg.KeyPath, cert.PrivateKey, 0o600) // -rw-------
+	/* This should have been done in setup
+	but double check is always a good choice.*/
+	_, err := os.Stat(path.Dir(p.cfg.CertPath))
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err = os.MkdirAll(path.Dir(p.cfg.CertPath), 0o755); err != nil {
+				return E.FailWith("create cert directory", err)
+			}
+		} else {
+			return E.FailWith("stat cert directory", err)
+		}
+	}
+	err = os.WriteFile(p.cfg.KeyPath, cert.PrivateKey, 0o600) // -rw-------
 	if err != nil {
 		return E.FailWith("write key file", err)
 	}
@@ -247,6 +241,10 @@ func (p *Provider) certState() CertState {
 }
 
 func (p *Provider) renewIfNeeded() E.NestedError {
+	if p.cfg.Provider == ProviderLocal {
+		return nil
+	}
+
 	switch p.certState() {
 	case CertStateExpired:
 		logger.Info("certs expired, renewing")
@@ -284,7 +282,7 @@ func providerGenerator[CT any, PT challenge.Provider](
 	defaultCfg func() *CT,
 	newProvider func(*CT) (PT, error),
 ) ProviderGenerator {
-	return func(opt M.AutocertProviderOpt) (challenge.Provider, E.NestedError) {
+	return func(opt types.AutocertProviderOpt) (challenge.Provider, E.NestedError) {
 		cfg := defaultCfg()
 		err := U.Deserialize(opt, cfg)
 		if err.HasError() {

internal/autocert/provider_test/ovh_test.go

@@ -4,8 +4,8 @@ import (
 	"testing"
 
 	"github.com/go-acme/lego/v4/providers/dns/ovh"
-	U "github.com/yusing/go-proxy/utils"
-	. "github.com/yusing/go-proxy/utils/testing"
+	U "github.com/yusing/go-proxy/internal/utils"
+	. "github.com/yusing/go-proxy/internal/utils/testing"
 	"gopkg.in/yaml.v3"
 )
 
@@ -45,6 +45,6 @@ oauth2_config:
 	testYaml = testYaml[1:] // remove first \n
 	opt := make(map[string]any)
 	ExpectNoError(t, yaml.Unmarshal([]byte(testYaml), opt))
-	ExpectTrue(t, U.Deserialize(opt, cfg).NoError())
+	ExpectNoError(t, U.Deserialize(opt, cfg).Error())
 	ExpectDeepEqual(t, cfg, cfgExpected)
 }

internal/autocert/setup.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"os"
 
-	E "github.com/yusing/go-proxy/error"
+	E "github.com/yusing/go-proxy/internal/error"
 )
 
 func (p *Provider) Setup(ctx context.Context) (err E.NestedError) {
@@ -14,7 +14,7 @@ func (p *Provider) Setup(ctx context.Context) (err E.NestedError) {
 		}
 		logger.Debug("obtaining cert due to error loading cert")
 		if err = p.ObtainCert(); err != nil {
-			return err.Warn()
+			return err
 		}
 	}
 

internal/autocert/state.go

@@ -0,0 +1,9 @@
+package autocert
+
+type CertState int
+
+const (
+	CertStateValid CertState = iota
+	CertStateExpired
+	CertStateMismatch
+)

internal/autocert/user.go

@@ -1,8 +1,9 @@
 package autocert
 
 import (
-	"github.com/go-acme/lego/v4/registration"
 	"crypto"
+
+	"github.com/go-acme/lego/v4/registration"
 )
 
 type User struct {
@@ -19,4 +20,4 @@ func (u *User) GetRegistration() *registration.Resource {
 }
 func (u *User) GetPrivateKey() crypto.PrivateKey {
 	return u.key
-}
+}

internal/common/args.go

@@ -2,9 +2,9 @@ package common
 
 import (
 	"flag"
+	"fmt"
 
 	"github.com/sirupsen/logrus"
-	E "github.com/yusing/go-proxy/error"
 )
 
 type Args struct {
@@ -13,39 +13,45 @@ type Args struct {
 
 const (
 	CommandStart              = ""
+	CommandSetup              = "setup"
 	CommandValidate           = "validate"
 	CommandListConfigs        = "ls-config"
 	CommandListRoutes         = "ls-routes"
+	CommandListIcons          = "ls-icons"
 	CommandReload             = "reload"
 	CommandDebugListEntries   = "debug-ls-entries"
 	CommandDebugListProviders = "debug-ls-providers"
+	CommandDebugListMTrace    = "debug-ls-mtrace"
 )
 
 var ValidCommands = []string{
 	CommandStart,
+	CommandSetup,
 	CommandValidate,
 	CommandListConfigs,
 	CommandListRoutes,
+	CommandListIcons,
 	CommandReload,
 	CommandDebugListEntries,
 	CommandDebugListProviders,
+	CommandDebugListMTrace,
 }
 
 func GetArgs() Args {
 	var args Args
 	flag.Parse()
 	args.Command = flag.Arg(0)
-	if err := validateArg(args.Command); err.HasError() {
+	if err := validateArg(args.Command); err != nil {
 		logrus.Fatal(err)
 	}
 	return args
 }
 
-func validateArg(arg string) E.NestedError {
+func validateArg(arg string) error {
 	for _, v := range ValidCommands {
 		if arg == v {
 			return nil
 		}
 	}
-	return E.Invalid("argument", arg)
+	return fmt.Errorf("invalid command: %s", arg)
 }

internal/common/constants.go

@@ -0,0 +1,53 @@
+package common
+
+import (
+	"time"
+)
+
+const (
+	ConnectionTimeout = 5 * time.Second
+	DialTimeout       = 3 * time.Second
+	KeepAlive         = 60 * time.Second
+)
+
+// file, folder structure
+
+const (
+	ConfigBasePath        = "config"
+	ConfigFileName        = "config.yml"
+	ConfigExampleFileName = "config.example.yml"
+	ConfigPath            = ConfigBasePath + "/" + ConfigFileName
+
+	MiddlewareComposeBasePath = ConfigBasePath + "/middlewares"
+)
+
+const (
+	SchemaBasePath         = "schema"
+	ConfigSchemaPath       = SchemaBasePath + "/config.schema.json"
+	FileProviderSchemaPath = SchemaBasePath + "/providers.schema.json"
+)
+
+const (
+	ComposeFileName        = "compose.yml"
+	ComposeExampleFileName = "compose.example.yml"
+)
+
+const (
+	ErrorPagesBasePath = "error_pages"
+)
+
+var RequiredDirectories = []string{
+	ConfigBasePath,
+	SchemaBasePath,
+	ErrorPagesBasePath,
+	MiddlewareComposeBasePath,
+}
+
+const DockerHostFromEnv = "$DOCKER_HOST"
+
+const (
+	IdleTimeoutDefault = "0"
+	WakeTimeoutDefault = "30s"
+	StopTimeoutDefault = "10s"
+	StopMethodDefault  = "stop"
+)

internal/common/env.go

@@ -0,0 +1,66 @@
+package common
+
+import (
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+)
+
+var (
+	NoSchemaValidation = GetEnvBool("GOPROXY_NO_SCHEMA_VALIDATION", true)
+	IsTest             = GetEnvBool("GOPROXY_TEST", false) || strings.HasSuffix(os.Args[0], ".test")
+	IsDebug            = GetEnvBool("GOPROXY_DEBUG", IsTest)
+
+	ProxyHTTPAddr,
+	ProxyHTTPHost,
+	ProxyHTTPPort,
+	ProxyHTTPURL = GetAddrEnv("GOPROXY_HTTP_ADDR", ":80", "http")
+
+	ProxyHTTPSAddr,
+	ProxyHTTPSHost,
+	ProxyHTTPSPort,
+	ProxyHTTPSURL = GetAddrEnv("GOPROXY_HTTPS_ADDR", ":443", "https")
+
+	APIHTTPAddr,
+	APIHTTPHost,
+	APIHTTPPort,
+	APIHTTPURL = GetAddrEnv("GOPROXY_API_ADDR", "127.0.0.1:8888", "http")
+)
+
+func GetEnvBool(key string, defaultValue bool) bool {
+	value, ok := os.LookupEnv(key)
+	if !ok || value == "" {
+		return defaultValue
+	}
+	b, err := strconv.ParseBool(value)
+	if err != nil {
+		log.Fatalf("Invalid boolean value: %s", value)
+	}
+	return b
+}
+
+func GetEnv(key, defaultValue string) string {
+	value, ok := os.LookupEnv(key)
+	if !ok || value == "" {
+		value = defaultValue
+	}
+	return value
+}
+
+func GetAddrEnv(key, defaultValue, scheme string) (addr, host, port, fullURL string) {
+	addr = GetEnv(key, defaultValue)
+	host, port, err := net.SplitHostPort(addr)
+	if err != nil {
+		logrus.Fatalf("Invalid address: %s", addr)
+	}
+	if host == "" {
+		host = "localhost"
+	}
+	fullURL = fmt.Sprintf("%s://%s:%s", scheme, host, port)
+	return
+}

internal/common/ports.go

@@ -0,0 +1,75 @@
+package common
+
+var (
+	WellKnownHTTPPorts = map[string]bool{
+		"80":   true,
+		"8000": true,
+		"8008": true,
+		"8080": true,
+		"3000": true,
+	}
+
+	ServiceNamePortMapTCP = map[string]int{
+		"mssql":            1433,
+		"mysql":            3306,
+		"mariadb":          3306,
+		"postgres":         5432,
+		"rabbitmq":         5672,
+		"redis":            6379,
+		"memcached":        11211,
+		"mongo":            27017,
+		"minecraft-server": 25565,
+
+		"ssh":  22,
+		"ftp":  21,
+		"smtp": 25,
+		"dns":  53,
+		"pop3": 110,
+		"imap": 143,
+	}
+
+	ImageNamePortMap = func() (m map[string]int) {
+		m = make(map[string]int, len(ServiceNamePortMapTCP)+len(imageNamePortMap))
+		for k, v := range ServiceNamePortMapTCP {
+			m[k] = v
+		}
+		for k, v := range imageNamePortMap {
+			m[k] = v
+		}
+		return
+	}()
+
+	imageNamePortMap = map[string]int{
+		"adguardhome":         3000,
+		"bazarr":              6767,
+		"calibre-web":         8083,
+		"changedetection.io":  3000,
+		"dockge":              5001,
+		"gitea":               3000,
+		"gogs":                3000,
+		"grafana":             3000,
+		"home-assistant":      8123,
+		"homebridge":          8581,
+		"httpd":               80,
+		"immich":              3001,
+		"jellyfin":            8096,
+		"lidarr":              8686,
+		"microbin":            8080,
+		"nginx":               80,
+		"nginx-proxy-manager": 81,
+		"open-webui":          8080,
+		"plex":                32400,
+		"portainer-be":        9443,
+		"portainer-ce":        9443,
+		"prometheus":          9090,
+		"prowlarr":            9696,
+		"radarr":              7878,
+		"radarr-sma":          7878,
+		"rsshub":              1200,
+		"rss-bridge":          80,
+		"sonarr":              8989,
+		"sonarr-sma":          8989,
+		"uptime-kuma":         3001,
+		"whisparr":            6969,
+	}
+)

internal/config/config.go

@@ -5,21 +5,21 @@ import (
 	"os"
 
 	"github.com/sirupsen/logrus"
-	"github.com/yusing/go-proxy/autocert"
-	"github.com/yusing/go-proxy/common"
-	E "github.com/yusing/go-proxy/error"
-	M "github.com/yusing/go-proxy/models"
-	PR "github.com/yusing/go-proxy/proxy/provider"
-	R "github.com/yusing/go-proxy/route"
-	U "github.com/yusing/go-proxy/utils"
-	F "github.com/yusing/go-proxy/utils/functional"
-	W "github.com/yusing/go-proxy/watcher"
-	"github.com/yusing/go-proxy/watcher/events"
+	"github.com/yusing/go-proxy/internal/autocert"
+	"github.com/yusing/go-proxy/internal/common"
+	E "github.com/yusing/go-proxy/internal/error"
+	PR "github.com/yusing/go-proxy/internal/proxy/provider"
+	R "github.com/yusing/go-proxy/internal/route"
+	"github.com/yusing/go-proxy/internal/types"
+	U "github.com/yusing/go-proxy/internal/utils"
+	F "github.com/yusing/go-proxy/internal/utils/functional"
+	W "github.com/yusing/go-proxy/internal/watcher"
+	"github.com/yusing/go-proxy/internal/watcher/events"
 	"gopkg.in/yaml.v3"
 )
 
 type Config struct {
-	value            *M.Config
+	value            *types.Config
 	proxyProviders   F.Map[string, *PR.Provider]
 	autocertProvider *autocert.Provider
 
@@ -31,25 +31,48 @@ type Config struct {
 	reloadReq     chan struct{}
 }
 
-func Load() (*Config, E.NestedError) {
-	cfg := &Config{
+var instance *Config
+
+func GetInstance() *Config {
+	return instance
+}
+
+func Load() E.NestedError {
+	if instance != nil {
+		return nil
+	}
+	instance = &Config{
+		value:          types.DefaultConfig(),
 		proxyProviders: F.NewMapOf[string, *PR.Provider](),
 		l:              logrus.WithField("module", "config"),
-		watcher:        W.NewFileWatcher(common.ConfigFileName),
+		watcher:        W.NewConfigFileWatcher(common.ConfigFileName),
 		reloadReq:      make(chan struct{}, 1),
 	}
-	return cfg, cfg.load()
+	return instance.load()
 }
 
 func Validate(data []byte) E.NestedError {
 	return U.ValidateYaml(U.GetSchema(common.ConfigSchemaPath), data)
 }
 
-func (cfg *Config) Value() M.Config {
+func MatchDomains() []string {
+	if instance == nil {
+		logrus.Panic("config has not been loaded, please check if there is any errors")
+	}
+	return instance.value.MatchDomains
+}
+
+func (cfg *Config) Value() types.Config {
+	if cfg == nil {
+		logrus.Panic("config has not been loaded, please check if there is any errors")
+	}
 	return *cfg.value
 }
 
 func (cfg *Config) GetAutoCertProvider() *autocert.Provider {
+	if instance == nil {
+		logrus.Panic("config has not been loaded, please check if there is any errors")
+	}
 	return cfg.autocertProvider
 }
 
@@ -61,13 +84,11 @@ func (cfg *Config) Dispose() {
 	cfg.stopProviders()
 }
 
-func (cfg *Config) Reload() E.NestedError {
+func (cfg *Config) Reload() (err E.NestedError) {
 	cfg.stopProviders()
-	if err := cfg.load(); err.HasError() {
-		return err
-	}
+	err = cfg.load()
 	cfg.StartProxyProviders()
-	return nil
+	return
 }
 
 func (cfg *Config) StartProxyProviders() {
@@ -95,8 +116,9 @@ func (cfg *Config) WatchChanges() {
 			case <-cfg.watcherCtx.Done():
 				return
 			case event := <-eventCh:
-				if event.Action == events.ActionFileDeleted {
-					cfg.stopProviders()
+				if event.Action == events.ActionFileDeleted || event.Action == events.ActionFileRenamed {
+					cfg.l.Error("config file deleted or renamed, ignoring...")
+					continue
 				} else {
 					cfg.reloadReq <- struct{}{}
 				}
@@ -126,32 +148,32 @@ func (cfg *Config) load() (res E.NestedError) {
 	data, err := E.Check(os.ReadFile(common.ConfigPath))
 	if err.HasError() {
 		b.Add(E.FailWith("read config", err))
-		return
+		logrus.Fatal(b.Build())
 	}
 
 	if !common.NoSchemaValidation {
 		if err = Validate(data); err.HasError() {
 			b.Add(E.FailWith("schema validation", err))
-			return
+			logrus.Fatal(b.Build())
 		}
 	}
 
-	model := M.DefaultConfig()
+	model := types.DefaultConfig()
 	if err := E.From(yaml.Unmarshal(data, model)); err.HasError() {
 		b.Add(E.FailWith("parse config", err))
-		return
+		logrus.Fatal(b.Build())
 	}
 
 	// errors are non fatal below
-	b.WithSeverity(E.SeverityWarning)
 	b.Add(cfg.initAutoCert(&model.AutoCert))
 	b.Add(cfg.loadProviders(&model.Providers))
 
 	cfg.value = model
+	R.SetFindMuxDomains(model.MatchDomains)
 	return
 }
 
-func (cfg *Config) initAutoCert(autocertCfg *M.AutoCertConfig) (err E.NestedError) {
+func (cfg *Config) initAutoCert(autocertCfg *types.AutoCertConfig) (err E.NestedError) {
 	if cfg.autocertProvider != nil {
 		return
 	}
@@ -166,7 +188,7 @@ func (cfg *Config) initAutoCert(autocertCfg *M.AutoCertConfig) (err E.NestedErro
 	return
 }
 
-func (cfg *Config) loadProviders(providers *M.ProxyProviders) (res E.NestedError) {
+func (cfg *Config) loadProviders(providers *types.ProxyProviders) (res E.NestedError) {
 	cfg.l.Debug("loading providers")
 	defer cfg.l.Debug("loaded providers")
 
@@ -189,7 +211,7 @@ func (cfg *Config) loadProviders(providers *M.ProxyProviders) (res E.NestedError
 			continue
 		}
 		cfg.proxyProviders.Store(p.GetName(), p)
-		b.Add(p.LoadRoutes().Subject(dockerHost))
+		b.Add(p.LoadRoutes().Subject(p.GetName()))
 	}
 	return
 }
@@ -197,7 +219,7 @@ func (cfg *Config) loadProviders(providers *M.ProxyProviders) (res E.NestedError
 func (cfg *Config) controlProviders(action string, do func(*PR.Provider) E.NestedError) {
 	errors := E.NewBuilder("errors in %s these providers", action)
 
-	cfg.proxyProviders.RangeAll(func(name string, p *PR.Provider) {
+	cfg.proxyProviders.RangeAllParallel(func(name string, p *PR.Provider) {
 		if err := do(p); err.HasError() {
 			errors.Add(err.Subject(p))
 		}

internal/config/query.go

@@ -0,0 +1,150 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/yusing/go-proxy/internal/common"
+	H "github.com/yusing/go-proxy/internal/homepage"
+	PR "github.com/yusing/go-proxy/internal/proxy/provider"
+	R "github.com/yusing/go-proxy/internal/route"
+	"github.com/yusing/go-proxy/internal/types"
+	U "github.com/yusing/go-proxy/internal/utils"
+	F "github.com/yusing/go-proxy/internal/utils/functional"
+)
+
+func (cfg *Config) DumpEntries() map[string]*types.RawEntry {
+	entries := make(map[string]*types.RawEntry)
+	cfg.forEachRoute(func(alias string, r R.Route, p *PR.Provider) {
+		entries[alias] = r.Entry()
+	})
+	return entries
+}
+
+func (cfg *Config) DumpProviders() map[string]*PR.Provider {
+	entries := make(map[string]*PR.Provider)
+	cfg.proxyProviders.RangeAll(func(name string, p *PR.Provider) {
+		entries[name] = p
+	})
+	return entries
+}
+
+func (cfg *Config) HomepageConfig() H.HomePageConfig {
+	var proto, port string
+	domains := cfg.value.MatchDomains
+	cert, _ := cfg.autocertProvider.GetCert(nil)
+	if cert != nil {
+		proto = "https"
+		port = common.ProxyHTTPSPort
+	} else {
+		proto = "http"
+		port = common.ProxyHTTPPort
+	}
+
+	hpCfg := H.NewHomePageConfig()
+	cfg.forEachRoute(func(alias string, r R.Route, p *PR.Provider) {
+		if !r.Started() {
+			return
+		}
+
+		entry := r.Entry()
+		if entry.Homepage == nil {
+			entry.Homepage = &H.HomePageItem{
+				Show: r.Entry().IsExplicit || !p.IsExplicitOnly(),
+			}
+		}
+
+		item := entry.Homepage
+
+		if !item.Show && !item.IsEmpty() {
+			item.Show = true
+		}
+
+		if !item.Show || r.Type() != R.RouteTypeReverseProxy {
+			return
+		}
+
+		if item.Name == "" {
+			item.Name = U.Title(
+				strings.ReplaceAll(
+					strings.ReplaceAll(alias, "-", " "),
+					"_", " ",
+				),
+			)
+		}
+
+		if p.GetType() == PR.ProviderTypeDocker {
+			if item.Category == "" {
+				item.Category = "Docker"
+			}
+			item.SourceType = string(PR.ProviderTypeDocker)
+		} else if p.GetType() == PR.ProviderTypeFile {
+			if item.Category == "" {
+				item.Category = "Others"
+			}
+			item.SourceType = string(PR.ProviderTypeFile)
+		}
+
+		if item.URL == "" {
+			if len(domains) > 0 {
+				item.URL = fmt.Sprintf("%s://%s.%s:%s", proto, strings.ToLower(alias), domains[0], port)
+			}
+		}
+		item.AltURL = r.URL().String()
+
+		hpCfg.Add(item)
+	})
+	return hpCfg
+}
+
+func (cfg *Config) RoutesByAlias() map[string]U.SerializedObject {
+	routes := make(map[string]U.SerializedObject)
+	cfg.forEachRoute(func(alias string, r R.Route, p *PR.Provider) {
+		if !r.Started() {
+			return
+		}
+		obj, err := U.Serialize(r)
+		if err.HasError() {
+			cfg.l.Error(err)
+			return
+		}
+		obj["provider"] = p.GetName()
+		obj["type"] = string(r.Type())
+		obj["started"] = r.Started()
+		obj["raw"] = r.Entry()
+		routes[alias] = obj
+	})
+	return routes
+}
+
+func (cfg *Config) Statistics() map[string]any {
+	nTotalStreams := 0
+	nTotalRPs := 0
+	providerStats := make(map[string]PR.ProviderStats)
+
+	cfg.proxyProviders.RangeAll(func(name string, p *PR.Provider) {
+		providerStats[name] = p.Statistics()
+	})
+
+	for _, stats := range providerStats {
+		nTotalRPs += stats.NumRPs
+		nTotalStreams += stats.NumStreams
+	}
+
+	return map[string]any{
+		"num_total_streams":         nTotalStreams,
+		"num_total_reverse_proxies": nTotalRPs,
+		"providers":                 providerStats,
+	}
+}
+
+func (cfg *Config) FindRoute(alias string) R.Route {
+	return F.MapFind(cfg.proxyProviders,
+		func(p *PR.Provider) (R.Route, bool) {
+			if route, ok := p.GetRoute(alias); ok {
+				return route, true
+			}
+			return nil, false
+		},
+	)
+}

internal/docker/client.go

@@ -8,9 +8,9 @@ import (
 	"github.com/docker/cli/cli/connhelper"
 	"github.com/docker/docker/client"
 	"github.com/sirupsen/logrus"
-	"github.com/yusing/go-proxy/common"
-	E "github.com/yusing/go-proxy/error"
-	F "github.com/yusing/go-proxy/utils/functional"
+	"github.com/yusing/go-proxy/internal/common"
+	E "github.com/yusing/go-proxy/internal/error"
+	F "github.com/yusing/go-proxy/internal/utils/functional"
 )
 
 type Client struct {
@@ -133,7 +133,7 @@ func ConnectClient(host string) (Client, E.NestedError) {
 }
 
 func CloseAllClients() {
-	clientMap.RangeAll(func(_ string, c Client) {
+	clientMap.RangeAllParallel(func(_ string, c Client) {
 		c.Client.Close()
 	})
 	clientMap.Clear()

internal/docker/client_info.go

@@ -7,8 +7,7 @@ import (
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/client"
-
-	E "github.com/yusing/go-proxy/error"
+	E "github.com/yusing/go-proxy/internal/error"
 )
 
 type ClientInfo struct {

internal/docker/container.go

@@ -0,0 +1,141 @@
+package docker
+
+import (
+	"strconv"
+	"strings"
+
+	"github.com/docker/docker/api/types"
+	U "github.com/yusing/go-proxy/internal/utils"
+)
+
+type Container struct {
+	*types.Container
+	*ProxyProperties
+}
+
+func FromDocker(c *types.Container, dockerHost string) (res Container) {
+	res.Container = c
+	isExplicit := c.Labels[LabelAliases] != ""
+	res.ProxyProperties = &ProxyProperties{
+		DockerHost:         dockerHost,
+		ContainerName:      res.getName(),
+		ContainerID:        c.ID,
+		ImageName:          res.getImageName(),
+		PublicPortMapping:  res.getPublicPortMapping(),
+		PrivatePortMapping: res.getPrivatePortMapping(),
+		NetworkMode:        c.HostConfig.NetworkMode,
+		Aliases:            res.getAliases(),
+		IsExcluded:         U.ParseBool(res.getDeleteLabel(LabelExclude)),
+		IsExplicit:         isExplicit,
+		IsDatabase:         res.isDatabase(),
+		IdleTimeout:        res.getDeleteLabel(LabelIdleTimeout),
+		WakeTimeout:        res.getDeleteLabel(LabelWakeTimeout),
+		StopMethod:         res.getDeleteLabel(LabelStopMethod),
+		StopTimeout:        res.getDeleteLabel(LabelStopTimeout),
+		StopSignal:         res.getDeleteLabel(LabelStopSignal),
+		Running:            c.Status == "running" || c.State == "running",
+	}
+	return
+}
+
+func FromJSON(json types.ContainerJSON, dockerHost string) Container {
+	ports := make([]types.Port, 0)
+	for k, bindings := range json.NetworkSettings.Ports {
+		for _, v := range bindings {
+			pubPort, _ := strconv.ParseUint(v.HostPort, 10, 16)
+			privPort, _ := strconv.ParseUint(k.Port(), 10, 16)
+			ports = append(ports, types.Port{
+				IP:          v.HostIP,
+				PublicPort:  uint16(pubPort),
+				PrivatePort: uint16(privPort),
+			})
+		}
+	}
+	cont := FromDocker(&types.Container{
+		ID:     json.ID,
+		Names:  []string{json.Name},
+		Image:  json.Image,
+		Ports:  ports,
+		Labels: json.Config.Labels,
+		State:  json.State.Status,
+		Status: json.State.Status,
+	}, dockerHost)
+	cont.NetworkMode = string(json.HostConfig.NetworkMode)
+	return cont
+}
+
+func (c Container) getDeleteLabel(label string) string {
+	if l, ok := c.Labels[label]; ok {
+		delete(c.Labels, label)
+		return l
+	}
+	return ""
+}
+
+func (c Container) getAliases() []string {
+	if l := c.getDeleteLabel(LabelAliases); l != "" {
+		return U.CommaSeperatedList(l)
+	}
+	return []string{c.getName()}
+}
+
+func (c Container) getName() string {
+	return strings.TrimPrefix(c.Names[0], "/")
+}
+
+func (c Container) getImageName() string {
+	colonSep := strings.Split(c.Image, ":")
+	slashSep := strings.Split(colonSep[0], "/")
+	return slashSep[len(slashSep)-1]
+}
+
+func (c Container) getPublicPortMapping() PortMapping {
+	res := make(PortMapping)
+	for _, v := range c.Ports {
+		if v.PublicPort == 0 {
+			continue
+		}
+		res[U.PortString(v.PublicPort)] = v
+	}
+	return res
+}
+
+func (c Container) getPrivatePortMapping() PortMapping {
+	res := make(PortMapping)
+	for _, v := range c.Ports {
+		res[U.PortString(v.PrivatePort)] = v
+	}
+	return res
+}
+
+var databaseMPs = map[string]struct{}{
+	"/var/lib/postgresql/data": {},
+	"/var/lib/mysql":           {},
+	"/var/lib/mongodb":         {},
+	"/var/lib/mariadb":         {},
+	"/var/lib/memcached":       {},
+	"/var/lib/rabbitmq":        {},
+}
+
+var databasePrivPorts = map[uint16]struct{}{
+	5432:  {}, // postgres
+	3306:  {}, // mysql, mariadb
+	6379:  {}, // redis
+	11211: {}, // memcached
+	27017: {}, // mongodb
+}
+
+func (c Container) isDatabase() bool {
+	for _, m := range c.Container.Mounts {
+		if _, ok := databaseMPs[m.Destination]; ok {
+			return true
+		}
+	}
+
+	for _, v := range c.Ports {
+		if _, ok := databasePrivPorts[v.PrivatePort]; ok {
+			return true
+		}
+	}
+	return false
+}

internal/docker/idlewatcher/html/loading_page.html

@@ -66,22 +66,23 @@
     <body>
         <script>
             window.onload = async function () {
-                let result = await fetch(window.location.href, {
+                let resp = await fetch(window.location.href, {
                     headers: {
-                        {{ range $key, $value := .RequestHeaders }}
-                        '{{ $key }}' : {{ $value }}
-                        {{ end }}
+                        "{{.CheckRedirectHeader}}": "1",
                     },
-                }).then((resp) => resp.text())
-                    .catch((err) => {
-                        document.getElementById("message").innerText = err;
-                    });
-                if (result) {
-                    document.documentElement.innerHTML = result
+                });
+                if (resp.ok) {
+                    window.location.href = resp.url;
+                } else {
+                    document.getElementById("message").innerText =
+                        await resp.text();
+                    document
+                        .getElementById("spinner")
+                        .classList.replace("spinner", "error");
                 }
             };
         </script>
-        <div class="{{.SpinnerClass}}"></div>
-        <div class="message">{{.Message}}</div>
+        <div id="spinner" class="spinner"></div>
+        <div id="message" class="message">{{.Message}}</div>
     </body>
 </html>

internal/docker/idlewatcher/http.go

@@ -0,0 +1,38 @@
+package idlewatcher
+
+import (
+	"bytes"
+	_ "embed"
+	"fmt"
+	"strings"
+	"text/template"
+)
+
+type templateData struct {
+	CheckRedirectHeader string
+	Title               string
+	Message             string
+}
+
+//go:embed html/loading_page.html
+var loadingPage []byte
+var loadingPageTmpl = template.Must(template.New("loading_page").Parse(string(loadingPage)))
+
+const headerCheckRedirect = "X-Goproxy-Check-Redirect"
+
+func (w *Watcher) makeRespBody(format string, args ...any) []byte {
+	msg := fmt.Sprintf(format, args...)
+
+	data := new(templateData)
+	data.CheckRedirectHeader = headerCheckRedirect
+	data.Title = w.ContainerName
+	data.Message = strings.ReplaceAll(msg, "\n", "<br>")
+	data.Message = strings.ReplaceAll(data.Message, " ", "&ensp;")
+
+	buf := bytes.NewBuffer(make([]byte, 128)) // more than enough
+	err := loadingPageTmpl.Execute(buf, data)
+	if err != nil { // should never happen in production
+		panic(err)
+	}
+	return buf.Bytes()
+}

internal/docker/idlewatcher/waker.go

@@ -0,0 +1,133 @@
+package idlewatcher
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strconv"
+	"time"
+
+	gphttp "github.com/yusing/go-proxy/internal/net/http"
+)
+
+type Waker struct {
+	*Watcher
+
+	client *http.Client
+	rp     *gphttp.ReverseProxy
+}
+
+func NewWaker(w *Watcher, rp *gphttp.ReverseProxy) *Waker {
+	orig := rp.ServeHTTP
+	// workaround for stopped containers port become zero
+	rp.ServeHTTP = func(rw http.ResponseWriter, r *http.Request) {
+		if rp.TargetURL.Port() == "0" {
+			port, ok := portHistoryMap.Load(w.Alias)
+			if !ok {
+				w.l.Errorf("port history not found for %s", w.Alias)
+				http.Error(rw, "internal server error", http.StatusInternalServerError)
+				return
+			}
+			rp.TargetURL.Host = fmt.Sprintf("%s:%v", rp.TargetURL.Hostname(), port)
+		}
+		orig(rw, r)
+	}
+	return &Waker{
+		Watcher: w,
+		client: &http.Client{
+			Timeout:   1 * time.Second,
+			Transport: rp.Transport,
+		},
+		rp: rp,
+	}
+}
+
+func (w *Waker) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	w.wake(w.rp.ServeHTTP, rw, r)
+}
+
+func (w *Waker) wake(next http.HandlerFunc, rw http.ResponseWriter, r *http.Request) {
+	w.resetIdleTimer()
+
+	// pass through if container is ready
+	if w.ready.Load() {
+		next(rw, r)
+		return
+	}
+
+	ctx, cancel := context.WithTimeout(r.Context(), w.WakeTimeout)
+	defer cancel()
+
+	accept := gphttp.GetAccept(r.Header)
+	acceptHTML := (r.Method == http.MethodGet && accept.AcceptHTML() || r.RequestURI == "/" && accept.IsEmpty())
+
+	isCheckRedirect := r.Header.Get(headerCheckRedirect) != ""
+	if !isCheckRedirect && acceptHTML {
+		// Send a loading response to the client
+		body := w.makeRespBody("%s waking up...", w.ContainerName)
+		rw.Header().Set("Content-Type", "text/html; charset=utf-8")
+		rw.Header().Set("Content-Length", strconv.Itoa(len(body)))
+		rw.Header().Add("Cache-Control", "no-cache")
+		rw.Header().Add("Cache-Control", "no-store")
+		rw.Header().Add("Cache-Control", "must-revalidate")
+		if _, err := rw.Write(body); err != nil {
+			w.l.Errorf("error writing http response: %s", err)
+		}
+		return
+	}
+
+	// wake the container and reset idle timer
+	// also wait for another wake request
+	w.wakeCh <- struct{}{}
+
+	if <-w.wakeDone != nil {
+		http.Error(rw, "Error sending wake request", http.StatusInternalServerError)
+		return
+	}
+
+	// maybe another request came in while we were waiting for the wake
+	if w.ready.Load() {
+		if isCheckRedirect {
+			rw.WriteHeader(http.StatusOK)
+		} else {
+			next(rw, r)
+		}
+		return
+	}
+
+	for {
+		select {
+		case <-ctx.Done():
+			http.Error(rw, "Waking timed out", http.StatusGatewayTimeout)
+			return
+		default:
+		}
+
+		wakeReq, err := http.NewRequestWithContext(
+			ctx,
+			http.MethodHead,
+			w.URL.String(),
+			nil,
+		)
+		if err != nil {
+			w.l.Errorf("new request err to %s: %s", r.URL, err)
+			http.Error(rw, "Internal server error", http.StatusInternalServerError)
+			return
+		}
+
+		wakeResp, err := w.client.Do(wakeReq)
+		if err == nil && wakeResp.StatusCode != http.StatusServiceUnavailable {
+			w.ready.Store(true)
+			w.l.Debug("awaken")
+			if isCheckRedirect {
+				rw.WriteHeader(http.StatusOK)
+			} else {
+				next(rw, r)
+			}
+			return
+		}
+
+		// retry until the container is ready or timeout
+		time.Sleep(100 * time.Millisecond)
+	}
+}

internal/docker/idlewatcher/watcher.go

@@ -2,22 +2,22 @@ package idlewatcher
 
 import (
 	"context"
-	"net/http"
 	"sync"
 	"sync/atomic"
 	"time"
 
 	"github.com/docker/docker/api/types/container"
 	"github.com/sirupsen/logrus"
-	D "github.com/yusing/go-proxy/docker"
-	E "github.com/yusing/go-proxy/error"
-	P "github.com/yusing/go-proxy/proxy"
-	PT "github.com/yusing/go-proxy/proxy/fields"
-	W "github.com/yusing/go-proxy/watcher"
+	D "github.com/yusing/go-proxy/internal/docker"
+	E "github.com/yusing/go-proxy/internal/error"
+	P "github.com/yusing/go-proxy/internal/proxy"
+	PT "github.com/yusing/go-proxy/internal/proxy/fields"
+	F "github.com/yusing/go-proxy/internal/utils/functional"
+	W "github.com/yusing/go-proxy/internal/watcher"
 )
 
 type (
-	watcher struct {
+	Watcher struct {
 		*P.ReverseProxyEntry
 
 		client D.Client
@@ -27,6 +27,7 @@ type (
 
 		wakeCh   chan struct{}
 		wakeDone chan E.NestedError
+		ticker   *time.Ticker
 
 		ctx      context.Context
 		cancel   context.CancelFunc
@@ -45,15 +46,17 @@ var (
 	mainLoopCancel context.CancelFunc
 	mainLoopWg     sync.WaitGroup
 
-	watcherMap   = make(map[string]*watcher)
+	watcherMap   = F.NewMapOf[string, *Watcher]()
 	watcherMapMu sync.Mutex
 
-	newWatcherCh = make(chan *watcher)
+	portHistoryMap = F.NewMapOf[PT.Alias, string]()
+
+	newWatcherCh = make(chan *Watcher)
 
 	logger = logrus.WithField("module", "idle_watcher")
 )
 
-func Register(entry *P.ReverseProxyEntry) (*watcher, E.NestedError) {
+func Register(entry *P.ReverseProxyEntry) (*Watcher, E.NestedError) {
 	failure := E.Failure("idle_watcher register")
 
 	if entry.IdleTimeout == 0 {
@@ -63,7 +66,13 @@ func Register(entry *P.ReverseProxyEntry) (*watcher, E.NestedError) {
 	watcherMapMu.Lock()
 	defer watcherMapMu.Unlock()
 
-	if w, ok := watcherMap[entry.ContainerName]; ok {
+	key := entry.ContainerID
+
+	if entry.URL.Port() != "0" {
+		portHistoryMap.Store(entry.Alias, entry.URL.Port())
+	}
+
+	if w, ok := watcherMap.Load(key); ok {
 		w.refCount.Add(1)
 		w.ReverseProxyEntry = entry
 		return w, nil
@@ -74,18 +83,19 @@ func Register(entry *P.ReverseProxyEntry) (*watcher, E.NestedError) {
 		return nil, failure.With(err)
 	}
 
-	w := &watcher{
+	w := &Watcher{
 		ReverseProxyEntry: entry,
 		client:            client,
 		refCount:          &sync.WaitGroup{},
 		wakeCh:            make(chan struct{}, 1),
-		wakeDone:          make(chan E.NestedError, 1),
+		wakeDone:          make(chan E.NestedError),
+		ticker:            time.NewTicker(entry.IdleTimeout),
 		l:                 logger.WithField("container", entry.ContainerName),
 	}
 	w.refCount.Add(1)
 	w.stopByMethod = w.getStopCallback()
 
-	watcherMap[w.ContainerName] = w
+	watcherMap.Store(key, w)
 
 	go func() {
 		newWatcherCh <- w
@@ -94,10 +104,8 @@ func Register(entry *P.ReverseProxyEntry) (*watcher, E.NestedError) {
 	return w, nil
 }
 
-func Unregister(containerName string) {
-	if w, ok := watcherMap[containerName]; ok {
-		w.refCount.Add(-1)
-	}
+func (w *Watcher) Unregister() {
+	w.refCount.Add(-1)
 }
 
 func Start() {
@@ -117,8 +125,7 @@ func Start() {
 				w.watchUntilCancel()
 				w.refCount.Wait() // wait for 0 ref count
 
-				w.client.Close()
-				delete(watcherMap, w.ContainerName)
+				watcherMap.Delete(w.ContainerID)
 				w.l.Debug("unregistered")
 				mainLoopWg.Done()
 			}()
@@ -131,43 +138,42 @@ func Stop() {
 	mainLoopWg.Wait()
 }
 
-func (w *watcher) PatchRoundTripper(rtp http.RoundTripper) roundTripper {
-	return roundTripper{patched: func(r *http.Request) (*http.Response, error) {
-		return w.roundTrip(rtp.RoundTrip, r)
-	}}
-}
-
-func (w *watcher) containerStop() error {
-	return w.client.ContainerStop(w.ctx, w.ContainerName, container.StopOptions{
+func (w *Watcher) containerStop() error {
+	return w.client.ContainerStop(w.ctx, w.ContainerID, container.StopOptions{
 		Signal:  string(w.StopSignal),
-		Timeout: &w.StopTimeout})
+		Timeout: &w.StopTimeout,
+	})
 }
 
-func (w *watcher) containerPause() error {
-	return w.client.ContainerPause(w.ctx, w.ContainerName)
+func (w *Watcher) containerPause() error {
+	return w.client.ContainerPause(w.ctx, w.ContainerID)
 }
 
-func (w *watcher) containerKill() error {
-	return w.client.ContainerKill(w.ctx, w.ContainerName, string(w.StopSignal))
+func (w *Watcher) containerKill() error {
+	return w.client.ContainerKill(w.ctx, w.ContainerID, string(w.StopSignal))
 }
 
-func (w *watcher) containerUnpause() error {
-	return w.client.ContainerUnpause(w.ctx, w.ContainerName)
+func (w *Watcher) containerUnpause() error {
+	return w.client.ContainerUnpause(w.ctx, w.ContainerID)
 }
 
-func (w *watcher) containerStart() error {
-	return w.client.ContainerStart(w.ctx, w.ContainerName, container.StartOptions{})
+func (w *Watcher) containerStart() error {
+	return w.client.ContainerStart(w.ctx, w.ContainerID, container.StartOptions{})
 }
 
-func (w *watcher) containerStatus() (string, E.NestedError) {
-	json, err := w.client.ContainerInspect(w.ctx, w.ContainerName)
+func (w *Watcher) containerStatus() (string, E.NestedError) {
+	json, err := w.client.ContainerInspect(w.ctx, w.ContainerID)
 	if err != nil {
 		return "", E.FailWith("inspect container", err)
 	}
 	return json.State.Status, nil
 }
 
-func (w *watcher) wakeIfStopped() E.NestedError {
+func (w *Watcher) wakeIfStopped() E.NestedError {
+	if w.ready.Load() || w.ContainerRunning {
+		return nil
+	}
+
 	status, err := w.containerStatus()
 
 	if err.HasError() {
@@ -186,7 +192,7 @@ func (w *watcher) wakeIfStopped() E.NestedError {
 	}
 }
 
-func (w *watcher) getStopCallback() StopCallback {
+func (w *Watcher) getStopCallback() StopCallback {
 	var cb func() error
 	switch w.StopMethod {
 	case PT.StopMethodPause:
@@ -210,16 +216,20 @@ func (w *watcher) getStopCallback() StopCallback {
 	}
 }
 
-func (w *watcher) watchUntilCancel() {
+func (w *Watcher) resetIdleTimer() {
+	w.ticker.Reset(w.IdleTimeout)
+}
+
+func (w *Watcher) watchUntilCancel() {
 	defer close(w.wakeCh)
 
-	w.ctx, w.cancel = context.WithCancel(context.Background())
+	w.ctx, w.cancel = context.WithCancel(mainLoopCtx)
 
 	dockerWatcher := W.NewDockerWatcherWithClient(w.client)
 	dockerEventCh, dockerEventErrCh := dockerWatcher.EventsWithOptions(w.ctx, W.DockerListOptions{
 		Filters: W.NewDockerFilter(
 			W.DockerFilterContainer,
-			W.DockerrFilterContainerName(w.ContainerName),
+			W.DockerrFilterContainer(w.ContainerID),
 			W.DockerFilterStart,
 			W.DockerFilterStop,
 			W.DockerFilterDie,
@@ -228,14 +238,11 @@ func (w *watcher) watchUntilCancel() {
 			W.DockerFilterUnpause,
 		),
 	})
-
-	ticker := time.NewTicker(w.IdleTimeout)
-	defer ticker.Stop()
+	defer w.ticker.Stop()
+	defer w.client.Close()
 
 	for {
 		select {
-		case <-mainLoopCtx.Done():
-			w.cancel()
 		case <-w.ctx.Done():
 			w.l.Debug("stopped")
 			return
@@ -247,30 +254,29 @@ func (w *watcher) watchUntilCancel() {
 			switch {
 			// create / start / unpause
 			case e.Action.IsContainerWake():
-				ticker.Reset(w.IdleTimeout)
+				w.ContainerRunning = true
+				w.resetIdleTimer()
 				w.l.Info(e)
-			default: // stop / pause / kill
-				ticker.Stop()
+			default: // stop / pause / kil
+				w.ContainerRunning = false
+				w.ticker.Stop()
 				w.ready.Store(false)
 				w.l.Info(e)
 			}
-		case <-ticker.C:
+		case <-w.ticker.C:
 			w.l.Debug("idle timeout")
-			ticker.Stop()
+			w.ticker.Stop()
 			if err := w.stopByMethod(); err != nil && err.IsNot(context.Canceled) {
 				w.l.Error(E.FailWith("stop", err).Extraf("stop method: %s", w.StopMethod))
 			}
 		case <-w.wakeCh:
 			w.l.Debug("wake signal received")
-			ticker.Reset(w.IdleTimeout)
+			w.resetIdleTimer()
 			err := w.wakeIfStopped()
-			if err != nil && err.IsNot(context.Canceled) {
+			if err != nil {
 				w.l.Error(E.FailWith("wake", err))
 			}
-			select {
-			case w.wakeDone <- err: // this is passed to roundtrip
-			default:
-			}
+			w.wakeDone <- err
 		}
 	}
 }

internal/docker/inspect.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"time"
 
-	E "github.com/yusing/go-proxy/error"
+	E "github.com/yusing/go-proxy/internal/error"
 )
 
 func (c Client) Inspect(containerID string) (Container, E.NestedError) {
@@ -15,5 +15,5 @@ func (c Client) Inspect(containerID string) (Container, E.NestedError) {
 	if err != nil {
 		return Container{}, E.From(err)
 	}
-	return FromJson(json, c.key), nil
+	return FromJSON(json, c.key), nil
 }

internal/docker/label.go

@@ -0,0 +1,115 @@
+package docker
+
+import (
+	"reflect"
+	"strings"
+
+	E "github.com/yusing/go-proxy/internal/error"
+	U "github.com/yusing/go-proxy/internal/utils"
+)
+
+/*
+Formats:
+  - namespace.attribute
+  - namespace.target.attribute
+  - namespace.target.attribute.namespace2.attribute
+*/
+type (
+	Label struct {
+		Namespace string
+		Target    string
+		Attribute string
+		Value     any
+	}
+	NestedLabelMap map[string]U.SerializedObject
+)
+
+func (l *Label) String() string {
+	if l.Attribute == "" {
+		return l.Namespace + "." + l.Target
+	}
+	return l.Namespace + "." + l.Target + "." + l.Attribute
+}
+
+// Apply applies the value of a Label to the corresponding field in the given object.
+//
+// Parameters:
+//   - obj: a pointer to the object to which the Label value will be applied.
+//   - l: a pointer to the Label containing the attribute and value to be applied.
+//
+// Returns:
+//   - error: an error if the field does not exist.
+func ApplyLabel[T any](obj *T, l *Label) E.NestedError {
+	if obj == nil {
+		return E.Invalid("nil object", l)
+	}
+	switch nestedLabel := l.Value.(type) {
+	case *Label:
+		var field reflect.Value
+		objType := reflect.TypeFor[T]()
+		for i := range reflect.TypeFor[T]().NumField() {
+			if objType.Field(i).Tag.Get("yaml") == l.Attribute {
+				field = reflect.ValueOf(obj).Elem().Field(i)
+				break
+			}
+		}
+		if !field.IsValid() {
+			return E.NotExist("field", l.Attribute)
+		}
+		dst, ok := field.Interface().(NestedLabelMap)
+		if !ok {
+			if field.Kind() == reflect.Ptr {
+				if field.IsNil() {
+					field.Set(reflect.New(field.Type().Elem()))
+				}
+			} else {
+				field = field.Addr()
+			}
+			return U.Deserialize(U.SerializedObject{nestedLabel.Namespace: nestedLabel.Value}, field.Interface())
+		}
+		if dst == nil {
+			field.Set(reflect.MakeMap(reflect.TypeFor[NestedLabelMap]()))
+			dst = field.Interface().(NestedLabelMap)
+		}
+		if dst[nestedLabel.Namespace] == nil {
+			dst[nestedLabel.Namespace] = make(U.SerializedObject)
+		}
+		dst[nestedLabel.Namespace][nestedLabel.Attribute] = nestedLabel.Value
+		return nil
+	default:
+		return U.Deserialize(U.SerializedObject{l.Attribute: l.Value}, obj)
+	}
+}
+
+func ParseLabel(label string, value string) (*Label, E.NestedError) {
+	parts := strings.Split(label, ".")
+
+	if len(parts) < 2 {
+		return &Label{
+			Namespace: label,
+			Value:     value,
+		}, nil
+	}
+
+	l := &Label{
+		Namespace: parts[0],
+		Target:    parts[1],
+		Value:     value,
+	}
+
+	switch len(parts) {
+	case 2:
+		l.Attribute = l.Target
+	case 3:
+		l.Attribute = parts[2]
+	default:
+		l.Attribute = parts[2]
+		nestedLabel, err := ParseLabel(strings.Join(parts[3:], "."), value)
+		if err.HasError() {
+			return nil, err
+		}
+		l.Value = nestedLabel
+	}
+
+	return l, nil
+}

internal/docker/label_test.go

@@ -0,0 +1,83 @@
+package docker
+
+import (
+	"fmt"
+	"testing"
+
+	U "github.com/yusing/go-proxy/internal/utils"
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+const (
+	mName = "middleware1"
+	mAttr = "prop1"
+	v     = "value1"
+)
+
+func makeLabel(ns, name, attr string) string {
+	return fmt.Sprintf("%s.%s.%s", ns, name, attr)
+}
+
+func TestNestedLabel(t *testing.T) {
+	mAttr := "prop1"
+	pl, err := ParseLabel(makeLabel(NSProxy, "foo", makeLabel("middlewares", mName, mAttr)), v)
+	ExpectNoError(t, err.Error())
+	sGot := ExpectType[*Label](t, pl.Value)
+	ExpectFalse(t, sGot == nil)
+	ExpectEqual(t, sGot.Namespace, mName)
+	ExpectEqual(t, sGot.Attribute, mAttr)
+}
+
+func TestApplyNestedLabel(t *testing.T) {
+	entry := new(struct {
+		Middlewares NestedLabelMap `yaml:"middlewares"`
+	})
+	pl, err := ParseLabel(makeLabel(NSProxy, "foo", makeLabel("middlewares", mName, mAttr)), v)
+	ExpectNoError(t, err.Error())
+	err = ApplyLabel(entry, pl)
+	ExpectNoError(t, err.Error())
+	middleware1, ok := entry.Middlewares[mName]
+	ExpectTrue(t, ok)
+	got := ExpectType[string](t, middleware1[mAttr])
+	ExpectEqual(t, got, v)
+}
+
+func TestApplyNestedLabelExisting(t *testing.T) {
+	checkAttr := "prop2"
+	checkV := "value2"
+	entry := new(struct {
+		Middlewares NestedLabelMap `yaml:"middlewares"`
+	})
+	entry.Middlewares = make(NestedLabelMap)
+	entry.Middlewares[mName] = make(U.SerializedObject)
+	entry.Middlewares[mName][checkAttr] = checkV
+
+	pl, err := ParseLabel(makeLabel(NSProxy, "foo", makeLabel("middlewares", mName, mAttr)), v)
+	ExpectNoError(t, err.Error())
+	err = ApplyLabel(entry, pl)
+	ExpectNoError(t, err.Error())
+	middleware1, ok := entry.Middlewares[mName]
+	ExpectTrue(t, ok)
+	got := ExpectType[string](t, middleware1[mAttr])
+	ExpectEqual(t, got, v)
+
+	// check if prop2 is affected
+	ExpectFalse(t, middleware1[checkAttr] == nil)
+	got = ExpectType[string](t, middleware1[checkAttr])
+	ExpectEqual(t, got, checkV)
+}
+
+func TestApplyNestedLabelNoAttr(t *testing.T) {
+	entry := new(struct {
+		Middlewares NestedLabelMap `yaml:"middlewares"`
+	})
+	entry.Middlewares = make(NestedLabelMap)
+	entry.Middlewares[mName] = make(U.SerializedObject)
+
+	pl, err := ParseLabel(makeLabel(NSProxy, "foo", fmt.Sprintf("%s.%s", "middlewares", mName)), v)
+	ExpectNoError(t, err.Error())
+	err = ApplyLabel(entry, pl)
+	ExpectNoError(t, err.Error())
+	_, ok := entry.Middlewares[mName]
+	ExpectTrue(t, ok)
+}

internal/docker/labels.go

@@ -3,8 +3,11 @@ package docker
 const (
 	WildcardAlias = "*"
 
-	LableAliases     = NSProxy + ".aliases"
-	LableExclude     = NSProxy + ".exclude"
+	NSProxy    = "proxy"
+	NSHomePage = "homepage"
+
+	LabelAliases     = NSProxy + ".aliases"
+	LabelExclude     = NSProxy + ".exclude"
 	LabelIdleTimeout = NSProxy + ".idle_timeout"
 	LabelWakeTimeout = NSProxy + ".wake_timeout"
 	LabelStopMethod  = NSProxy + ".stop_method"

internal/docker/proxy_properties.go

@@ -0,0 +1,27 @@
+package docker
+
+import "github.com/docker/docker/api/types"
+
+type (
+	PortMapping     = map[string]types.Port
+	ProxyProperties struct {
+		DockerHost         string      `json:"docker_host" yaml:"-"`
+		ContainerName      string      `json:"container_name" yaml:"-"`
+		ContainerID        string      `json:"container_id" yaml:"-"`
+		ImageName          string      `json:"image_name" yaml:"-"`
+		PublicPortMapping  PortMapping `json:"public_ports" yaml:"-"`  // non-zero publicPort:types.Port
+		PrivatePortMapping PortMapping `json:"private_ports" yaml:"-"` // privatePort:types.Port
+		NetworkMode        string      `json:"network_mode" yaml:"-"`
+
+		Aliases     []string `json:"aliases" yaml:"-"`
+		IsExcluded  bool     `json:"is_excluded" yaml:"-"`
+		IsExplicit  bool     `json:"is_explicit" yaml:"-"`
+		IsDatabase  bool     `json:"is_database" yaml:"-"`
+		IdleTimeout string   `json:"idle_timeout" yaml:"-"`
+		WakeTimeout string   `json:"wake_timeout" yaml:"-"`
+		StopMethod  string   `json:"stop_method" yaml:"-"`
+		StopTimeout string   `json:"stop_timeout" yaml:"-"` // stop_method = "stop" only
+		StopSignal  string   `json:"stop_signal" yaml:"-"`  // stop_method = "stop" | "kill" only
+		Running     bool     `json:"running" yaml:"-"`
+	}
+)

internal/error/builder.go

@@ -2,6 +2,7 @@ package error
 
 import (
 	"fmt"
+	"strings"
 	"sync"
 )
 
@@ -10,9 +11,8 @@ type Builder struct {
 }
 
 type builder struct {
-	message  string
-	errors   []NestedError
-	severity Severity
+	message string
+	errors  []NestedError
 	sync.Mutex
 }
 
@@ -21,11 +21,10 @@ func NewBuilder(format string, args ...any) Builder {
 }
 
 // adding nil / nil is no-op,
-// you may safely pass expressions returning error to it
+// you may safely pass expressions returning error to it.
 func (b Builder) Add(err NestedError) Builder {
 	if err != nil {
 		b.Lock()
-		// TODO: if err severity is higher than b.severity, update b.severity
 		b.errors = append(b.errors, err)
 		b.Unlock()
 	}
@@ -40,8 +39,10 @@ func (b Builder) Addf(format string, args ...any) Builder {
 	return b.Add(errorf(format, args...))
 }
 
-func (b Builder) WithSeverity(s Severity) Builder {
-	b.severity = s
+func (b Builder) AddRangeE(errs ...error) Builder {
+	for _, err := range errs {
+		b.AddE(err)
+	}
 	return b
 }
 
@@ -55,18 +56,27 @@ func (b Builder) WithSeverity(s Severity) Builder {
 func (b Builder) Build() NestedError {
 	if len(b.errors) == 0 {
 		return nil
+	} else if len(b.errors) == 1 && !strings.ContainsRune(b.message, ' ') {
+		return b.errors[0].Subject(b.message)
 	}
-	return Join(b.message, b.errors...).Severity(b.severity)
+	return Join(b.message, b.errors...)
 }
 
 func (b Builder) To(ptr *NestedError) {
-	if *ptr == nil {
+	switch {
+	case ptr == nil:
+		return
+	case *ptr == nil:
 		*ptr = b.Build()
-	} else {
-		**ptr = *b.Build()
+	default:
+		(*ptr).extras = append((*ptr).extras, *b.Build())
 	}
 }
 
+func (b Builder) String() string {
+	return b.Build().String()
+}
+
 func (b Builder) HasError() bool {
 	return len(b.errors) > 0
 }

internal/error/builder_test.go

@@ -3,7 +3,7 @@ package error
 import (
 	"testing"
 
-	. "github.com/yusing/go-proxy/utils/testing"
+	. "github.com/yusing/go-proxy/internal/utils/testing"
 )
 
 func TestBuilderEmpty(t *testing.T) {
@@ -33,20 +33,18 @@ func TestBuilderNested(t *testing.T) {
 	eb.Add(Failure("Action 2").With(Invalid("Inner", "3")))
 
 	got := eb.Build().String()
-	expected1 :=
-		(`error occurred:
+	expected1 := (`error occurred:
   - Action 1 failed:
     - invalid Inner: 1
     - invalid Inner: 2
   - Action 2 failed:
     - invalid Inner: 3`)
-	expected2 :=
-		(`error occurred:
+	expected2 := (`error occurred:
   - Action 1 failed:
-    - invalid Inner: 2
-    - invalid Inner: 1
+    - invalid Inner: "1"
+    - invalid Inner: "2"
   - Action 2 failed:
-    - invalid Inner: 3`)
+    - invalid Inner: "3"`)
 	if got != expected1 && got != expected2 {
 		t.Errorf("expected \n%s, got \n%s", expected1, got)
 	}

internal/error/error.go

@@ -1,32 +1,54 @@
 package error
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"strings"
 )
 
 type (
-	NestedError = *nestedError
-	nestedError struct {
-		subject  string
-		err      error
-		extras   []nestedError
-		severity Severity
+	NestedError     = *NestedErrorImpl
+	NestedErrorImpl struct {
+		subject string
+		err     error
+		extras  []NestedErrorImpl
+	}
+	JSONNestedError struct {
+		Subject string            `json:"subject"`
+		Err     string            `json:"error"`
+		Extras  []JSONNestedError `json:"extras,omitempty"`
 	}
-	Severity uint8
-)
-
-const (
-	SeverityWarning Severity = iota
-	SeverityFatal
 )
 
 func From(err error) NestedError {
 	if IsNil(err) {
 		return nil
 	}
-	return &nestedError{err: err}
+	return &NestedErrorImpl{err: err}
+}
+
+func FromJSON(data []byte) (NestedError, bool) {
+	var j JSONNestedError
+	if err := json.Unmarshal(data, &j); err != nil {
+		return nil, false
+	}
+	if j.Err == "" {
+		return nil, false
+	}
+	extras := make([]NestedErrorImpl, len(j.Extras))
+	for i, e := range j.Extras {
+		extra, ok := fromJSONObject(e)
+		if !ok {
+			return nil, false
+		}
+		extras[i] = *extra
+	}
+	return &NestedErrorImpl{
+		subject: j.Subject,
+		err:     errors.New(j.Err),
+		extras:  extras,
+	}, true
 }
 
 // Check is a helper function that
@@ -36,26 +58,26 @@ func Check[T any](obj T, err error) (T, NestedError) {
 }
 
 func Join(message string, err ...NestedError) NestedError {
-	extras := make([]nestedError, len(err))
+	extras := make([]NestedErrorImpl, len(err))
 	nErr := 0
 	for i, e := range err {
 		if e == nil {
 			continue
 		}
 		extras[i] = *e
-		nErr += 1
+		nErr++
 	}
 	if nErr == 0 {
 		return nil
 	}
-	return &nestedError{
+	return &NestedErrorImpl{
 		err:    errors.New(message),
 		extras: extras,
 	}
 }
 
 func JoinE(message string, err ...error) NestedError {
-	b := NewBuilder(message)
+	b := NewBuilder("%s", message)
 	for _, e := range err {
 		b.AddE(e)
 	}
@@ -118,9 +140,9 @@ func (ne NestedError) With(s any) NestedError {
 	case string:
 		msg = ss
 	case fmt.Stringer:
-		msg = ss.String()
+		return ne.appendMsg(ss.String())
 	default:
-		msg = fmt.Sprint(s)
+		return ne.appendMsg(fmt.Sprint(s))
 	}
 	return ne.withError(From(errors.New(msg)))
 }
@@ -129,17 +151,26 @@ func (ne NestedError) Extraf(format string, args ...any) NestedError {
 	return ne.With(errorf(format, args...))
 }
 
-func (ne NestedError) Subject(s any) NestedError {
+func (ne NestedError) Subject(s any, sep ...string) NestedError {
 	if ne == nil {
 		return ne
 	}
+	var subject string
 	switch ss := s.(type) {
 	case string:
-		ne.subject = ss
+		subject = ss
 	case fmt.Stringer:
-		ne.subject = ss.String()
+		subject = ss.String()
 	default:
-		ne.subject = fmt.Sprint(s)
+		subject = fmt.Sprint(s)
+	}
+	switch {
+	case ne.subject == "":
+		ne.subject = subject
+	case len(sep) > 0:
+		ne.subject = fmt.Sprintf("%s%s%s", subject, sep[0], ne.subject)
+	default:
+		ne.subject = fmt.Sprintf("%s > %s", subject, ne.subject)
 	}
 	return ne
 }
@@ -148,30 +179,27 @@ func (ne NestedError) Subjectf(format string, args ...any) NestedError {
 	if ne == nil {
 		return ne
 	}
-	if strings.Contains(format, "%q") {
-		panic("Subjectf format should not contain %q")
-	}
-	if strings.Contains(format, "%w") {
-		panic("Subjectf format should not contain %w")
-	}
-	ne.subject = fmt.Sprintf(format, args...)
-	return ne
+	return ne.Subject(fmt.Sprintf(format, args...))
 }
 
-func (ne NestedError) Severity(s Severity) NestedError {
-	if ne == nil {
-		return ne
+func (ne NestedError) JSONObject() JSONNestedError {
+	extras := make([]JSONNestedError, len(ne.extras))
+	for i, e := range ne.extras {
+		extras[i] = e.JSONObject()
+	}
+	return JSONNestedError{
+		Subject: ne.subject,
+		Err:     ne.err.Error(),
+		Extras:  extras,
 	}
-	ne.severity = s
-	return ne
 }
 
-func (ne NestedError) Warn() NestedError {
-	if ne == nil {
-		return ne
+func (ne NestedError) JSON() []byte {
+	b, err := json.MarshalIndent(ne.JSONObject(), "", "  ")
+	if err != nil {
+		panic(err)
 	}
-	ne.severity = SeverityWarning
-	return ne
+	return b
 }
 
 func (ne NestedError) NoError() bool {
@@ -182,18 +210,18 @@ func (ne NestedError) HasError() bool {
 	return ne != nil
 }
 
-func (ne NestedError) IsFatal() bool {
-	return ne != nil && ne.severity == SeverityFatal
-}
-
-func (ne NestedError) IsWarning() bool {
-	return ne != nil && ne.severity == SeverityWarning
-}
-
 func errorf(format string, args ...any) NestedError {
 	return From(fmt.Errorf(format, args...))
 }
 
+func fromJSONObject(obj JSONNestedError) (NestedError, bool) {
+	data, err := json.Marshal(obj)
+	if err != nil {
+		return nil, false
+	}
+	return FromJSON(data)
+}
+
 func (ne NestedError) withError(err NestedError) NestedError {
 	if ne != nil && err != nil {
 		ne.extras = append(ne.extras, *err)
@@ -201,8 +229,16 @@ func (ne NestedError) withError(err NestedError) NestedError {
 	return ne
 }
 
+func (ne NestedError) appendMsg(msg string) NestedError {
+	if ne == nil {
+		return nil
+	}
+	ne.err = fmt.Errorf("%w %s", ne.err, msg)
+	return ne
+}
+
 func (ne NestedError) writeToSB(sb *strings.Builder, level int, prefix string) {
-	for i := 0; i < level; i++ {
+	for range level {
 		sb.WriteString("  ")
 	}
 	sb.WriteString(prefix)
@@ -229,7 +265,7 @@ func (ne NestedError) buildError(level int, prefix string) error {
 	var res error
 	var sb strings.Builder
 
-	for i := 0; i < level; i++ {
+	for range level {
 		sb.WriteString("  ")
 	}
 	sb.WriteString(prefix)
@@ -251,6 +287,8 @@ func (ne NestedError) buildError(level int, prefix string) error {
 		for _, extra := range ne.extras {
 			res = errors.Join(res, extra.buildError(level+1, "- "))
 		}
+	} else {
+		res = fmt.Errorf("%w%s", res, sb.String())
 	}
 	return res
 }

internal/error/error_test.go

@@ -1,11 +1,10 @@
-package error_test
+package error
 
 import (
 	"errors"
 	"testing"
 
-	. "github.com/yusing/go-proxy/error"
-	. "github.com/yusing/go-proxy/utils/testing"
+	. "github.com/yusing/go-proxy/internal/utils/testing"
 )
 
 func TestErrorIs(t *testing.T) {
@@ -31,11 +30,11 @@ func TestErrorNestedIs(t *testing.T) {
 
 	err = Failure("some reason")
 	ExpectTrue(t, err.Is(ErrFailure))
-	ExpectFalse(t, err.Is(ErrAlreadyExist))
+	ExpectFalse(t, err.Is(ErrDuplicated))
 
-	err.With(AlreadyExist("something", ""))
+	err.With(Duplicated("something", ""))
 	ExpectTrue(t, err.Is(ErrFailure))
-	ExpectTrue(t, err.Is(ErrAlreadyExist))
+	ExpectTrue(t, err.Is(ErrDuplicated))
 	ExpectFalse(t, err.Is(ErrInvalid))
 }
 
@@ -88,8 +87,7 @@ func TestErrorNested(t *testing.T) {
 		With("baz").
 		With(inner).
 		With(inner.With(inner2.With(inner3)))
-	want :=
-		`foo failed:
+	want := `foo failed:
   - bar
   - baz
   - inner failed:

internal/error/errors.go

@@ -2,6 +2,7 @@ package error
 
 import (
 	stderrors "errors"
+	"reflect"
 )
 
 var (
@@ -10,10 +11,14 @@ var (
 	ErrUnsupported  = stderrors.New("unsupported")
 	ErrUnexpected   = stderrors.New("unexpected")
 	ErrNotExists    = stderrors.New("does not exist")
-	ErrAlreadyExist = stderrors.New("already exist")
+	ErrMissing      = stderrors.New("missing")
+	ErrDuplicated   = stderrors.New("duplicated")
+	ErrOutOfRange   = stderrors.New("out of range")
+	ErrTypeError    = stderrors.New("type error")
+	ErrTypeMismatch = stderrors.New("type mismatch")
 )
 
-const fmtSubjectWhat = "%w %v: %v"
+const fmtSubjectWhat = "%w %v: %q"
 
 func Failure(what string) NestedError {
 	return errorf("%s %w", what, ErrFailure)
@@ -47,6 +52,26 @@ func NotExist(subject, what any) NestedError {
 	return errorf("%v %w: %v", subject, ErrNotExists, what)
 }
 
-func AlreadyExist(subject, what any) NestedError {
-	return errorf("%v %w: %v", subject, ErrAlreadyExist, what)
+func Missing(subject any) NestedError {
+	return errorf("%w %v", ErrMissing, subject)
+}
+
+func Duplicated(subject, what any) NestedError {
+	return errorf("%w %v: %v", ErrDuplicated, subject, what)
+}
+
+func OutOfRange(subject any, value any) NestedError {
+	return errorf("%v %w: %v", subject, ErrOutOfRange, value)
+}
+
+func TypeError(subject any, from, to reflect.Type) NestedError {
+	return errorf("%v %w: %s -> %s\n", subject, ErrTypeError, from, to)
+}
+
+func TypeError2(subject any, from, to reflect.Value) NestedError {
+	return TypeError(subject, from.Type(), to.Type())
+}
+
+func TypeMismatch[Expect any](value any) NestedError {
+	return errorf("%w: expect %s got %T", ErrTypeMismatch, reflect.TypeFor[Expect](), value)
 }

internal/homepage/homepage.go

@@ -0,0 +1,43 @@
+package homepage
+
+type (
+	HomePageConfig   map[string]HomePageCategory
+	HomePageCategory []*HomePageItem
+
+	HomePageItem struct {
+		Show         bool           `yaml:"show" json:"show"`
+		Name         string         `yaml:"name" json:"name"`
+		Icon         string         `yaml:"icon" json:"icon"`
+		URL          string         `yaml:"url" json:"url"` // alias + domain
+		Category     string         `yaml:"category" json:"category"`
+		Description  string         `yaml:"description" json:"description"`
+		WidgetConfig map[string]any `yaml:",flow" json:"widget_config"`
+
+		SourceType string `yaml:"-" json:"source_type"`
+		AltURL     string `yaml:"-" json:"alt_url"` // original proxy target
+	}
+)
+
+func (item *HomePageItem) IsEmpty() bool {
+	return item == nil || (item.Name == "" &&
+		item.Icon == "" &&
+		item.URL == "" &&
+		item.Category == "" &&
+		item.Description == "" &&
+		len(item.WidgetConfig) == 0)
+}
+
+func NewHomePageConfig() HomePageConfig {
+	return HomePageConfig(make(map[string]HomePageCategory))
+}
+
+func (c *HomePageConfig) Clear() {
+	*c = make(HomePageConfig)
+}
+
+func (c HomePageConfig) Add(item *HomePageItem) {
+	if c[item.Category] == nil {
+		c[item.Category] = make(HomePageCategory, 0)
+	}
+	c[item.Category] = append(c[item.Category], item)
+}

internal/list-icons.go

@@ -0,0 +1,101 @@
+package internal
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/yusing/go-proxy/internal/utils"
+)
+
+type GitHubContents struct { //! keep this, may reuse in future
+	Type string `json:"type"`
+	Path string `json:"path"`
+	Name string `json:"name"`
+	Sha  string `json:"sha"`
+	Size int    `json:"size"`
+}
+
+const (
+	iconsCachePath = "/tmp/icons_cache.json"
+	updateInterval = 1 * time.Hour
+)
+
+func ListAvailableIcons() ([]string, error) {
+	owner := "walkxcode"
+	repo := "dashboard-icons"
+	ref := "main"
+
+	var lastUpdate time.Time
+
+	icons := make([]string, 0)
+	info, err := os.Stat(iconsCachePath)
+	if err == nil {
+		lastUpdate = info.ModTime().Local()
+	}
+	if time.Since(lastUpdate) < updateInterval {
+		err := utils.LoadJSON(iconsCachePath, &icons)
+		if err == nil {
+			return icons, nil
+		}
+	}
+
+	contents, err := getRepoContents(http.DefaultClient, owner, repo, ref, "")
+	if err != nil {
+		return nil, err
+	}
+	for _, content := range contents {
+		if content.Type != "dir" {
+			icons = append(icons, content.Path)
+		}
+	}
+	err = utils.SaveJSON(iconsCachePath, &icons, 0o644).Error()
+	if err != nil {
+		log.Print("error saving cache", err)
+	}
+	return icons, nil
+}
+
+func getRepoContents(client *http.Client, owner string, repo string, ref string, path string) ([]GitHubContents, error) {
+	req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("https://api.github.com/repos/%s/%s/contents/%s?ref=%s", owner, repo, path, ref), nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Accept", "application/json")
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	var contents []GitHubContents
+	err = json.Unmarshal(body, &contents)
+	if err != nil {
+		return nil, err
+	}
+
+	filesAndDirs := make([]GitHubContents, 0)
+	for _, content := range contents {
+		if content.Type == "dir" {
+			subContents, err := getRepoContents(client, owner, repo, ref, content.Path)
+			if err != nil {
+				return nil, err
+			}
+			filesAndDirs = append(filesAndDirs, subContents...)
+		} else {
+			filesAndDirs = append(filesAndDirs, content)
+		}
+	}
+
+	return filesAndDirs, nil
+}

internal/net/http/common.go

@@ -0,0 +1,31 @@
+package http
+
+import (
+	"crypto/tls"
+	"net"
+	"net/http"
+	"time"
+)
+
+var (
+	defaultDialer = net.Dialer{
+		Timeout:   60 * time.Second,
+		KeepAlive: 60 * time.Second,
+	}
+	DefaultTransport = &http.Transport{
+		Proxy:                 http.ProxyFromEnvironment,
+		DialContext:           defaultDialer.DialContext,
+		ForceAttemptHTTP2:     true,
+		MaxIdleConns:          100,
+		MaxIdleConnsPerHost:   10,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+	}
+	DefaultTransportNoTLS = func() *http.Transport {
+		var clone = DefaultTransport.Clone()
+		clone.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
+		return clone
+	}()
+)
+
+const StaticFilePathPrefix = "/$gperrorpage/"

internal/net/http/content_type.go

@@ -0,0 +1,76 @@
+package http
+
+import (
+	"mime"
+	"net/http"
+)
+
+type ContentType string
+type AcceptContentType []ContentType
+
+func GetContentType(h http.Header) ContentType {
+	ct := h.Get("Content-Type")
+	if ct == "" {
+		return ""
+	}
+	ct, _, err := mime.ParseMediaType(ct)
+	if err != nil {
+		return ""
+	}
+	return ContentType(ct)
+}
+
+func GetAccept(h http.Header) AcceptContentType {
+	var accepts []ContentType
+	for _, v := range h["Accept"] {
+		ct, _, err := mime.ParseMediaType(v)
+		if err != nil {
+			continue
+		}
+		accepts = append(accepts, ContentType(ct))
+	}
+	return accepts
+}
+
+func (ct ContentType) IsHTML() bool {
+	return ct == "text/html" || ct == "application/xhtml+xml"
+}
+
+func (ct ContentType) IsJSON() bool {
+	return ct == "application/json"
+}
+
+func (ct ContentType) IsPlainText() bool {
+	return ct == "text/plain"
+}
+
+func (act AcceptContentType) IsEmpty() bool {
+	return len(act) == 0
+}
+
+func (act AcceptContentType) AcceptHTML() bool {
+	for _, v := range act {
+		if v.IsHTML() || v == "text/*" || v == "*/*" {
+			return true
+		}
+	}
+	return false
+}
+
+func (act AcceptContentType) AcceptJSON() bool {
+	for _, v := range act {
+		if v.IsJSON() || v == "*/*" {
+			return true
+		}
+	}
+	return false
+}
+
+func (act AcceptContentType) AcceptPlainText() bool {
+	for _, v := range act {
+		if v.IsPlainText() || v == "text/*" || v == "*/*" {
+			return true
+		}
+	}
+	return false
+}

internal/net/http/content_type_test.go

@@ -0,0 +1,41 @@
+package http
+
+import (
+	"net/http"
+	"testing"
+
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+func TestContentTypes(t *testing.T) {
+	ExpectTrue(t, GetContentType(http.Header{"Content-Type": {"text/html"}}).IsHTML())
+	ExpectTrue(t, GetContentType(http.Header{"Content-Type": {"text/html; charset=utf-8"}}).IsHTML())
+	ExpectTrue(t, GetContentType(http.Header{"Content-Type": {"application/xhtml+xml"}}).IsHTML())
+	ExpectFalse(t, GetContentType(http.Header{"Content-Type": {"text/plain"}}).IsHTML())
+
+	ExpectTrue(t, GetContentType(http.Header{"Content-Type": {"application/json"}}).IsJSON())
+	ExpectTrue(t, GetContentType(http.Header{"Content-Type": {"application/json; charset=utf-8"}}).IsJSON())
+	ExpectFalse(t, GetContentType(http.Header{"Content-Type": {"text/html"}}).IsJSON())
+
+	ExpectTrue(t, GetContentType(http.Header{"Content-Type": {"text/plain"}}).IsPlainText())
+	ExpectTrue(t, GetContentType(http.Header{"Content-Type": {"text/plain; charset=utf-8"}}).IsPlainText())
+	ExpectFalse(t, GetContentType(http.Header{"Content-Type": {"text/html"}}).IsPlainText())
+}
+
+func TestAcceptContentTypes(t *testing.T) {
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"text/html", "text/plain"}}).AcceptPlainText())
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"text/html", "text/plain; charset=utf-8"}}).AcceptPlainText())
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"text/html", "text/plain"}}).AcceptHTML())
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"application/json"}}).AcceptJSON())
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"*/*"}}).AcceptPlainText())
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"*/*"}}).AcceptHTML())
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"*/*"}}).AcceptJSON())
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"text/*"}}).AcceptPlainText())
+	ExpectTrue(t, GetAccept(http.Header{"Accept": {"text/*"}}).AcceptHTML())
+
+	ExpectFalse(t, GetAccept(http.Header{"Accept": {"text/plain"}}).AcceptHTML())
+	ExpectFalse(t, GetAccept(http.Header{"Accept": {"text/plain; charset=utf-8"}}).AcceptHTML())
+	ExpectFalse(t, GetAccept(http.Header{"Accept": {"text/html"}}).AcceptPlainText())
+	ExpectFalse(t, GetAccept(http.Header{"Accept": {"text/html"}}).AcceptJSON())
+	ExpectFalse(t, GetAccept(http.Header{"Accept": {"text/*"}}).AcceptJSON())
+}

internal/net/http/header_utils.go

@@ -0,0 +1,53 @@
+package http
+
+import (
+	"net/http"
+)
+
+func RemoveHop(h http.Header) {
+	reqUpType := UpgradeType(h)
+	RemoveHopByHopHeaders(h)
+
+	if reqUpType != "" {
+		h.Set("Connection", "Upgrade")
+		h.Set("Upgrade", reqUpType)
+	} else {
+		h.Del("Connection")
+	}
+}
+
+func CopyHeader(dst, src http.Header) {
+	for k, vv := range src {
+		for _, v := range vv {
+			dst.Add(k, v)
+		}
+	}
+}
+
+func FilterHeaders(h http.Header, allowed []string) http.Header {
+	if len(allowed) == 0 {
+		return h
+	}
+
+	filtered := make(http.Header)
+
+	for i, header := range allowed {
+		values := h.Values(header)
+		if len(values) == 0 {
+			continue
+		}
+		filtered[http.CanonicalHeaderKey(allowed[i])] = append([]string(nil), values...)
+	}
+
+	return filtered
+}
+
+func HeaderToMap(h http.Header) map[string]string {
+	result := make(map[string]string)
+	for k, v := range h {
+		if len(v) > 0 {
+			result[k] = v[0] // Take the first value
+		}
+	}
+	return result
+}

internal/net/http/loadbalancer/ip_hash.go

@@ -0,0 +1,33 @@
+package loadbalancer
+
+import (
+	"hash/fnv"
+	"net"
+	"net/http"
+)
+
+type ipHash struct{ *LoadBalancer }
+
+func (lb *LoadBalancer) newIPHash() impl  { return &ipHash{lb} }
+func (ipHash) OnAddServer(srv *Server)    {}
+func (ipHash) OnRemoveServer(srv *Server) {}
+
+func (impl ipHash) ServeHTTP(_ servers, rw http.ResponseWriter, r *http.Request) {
+	ip, _, err := net.SplitHostPort(r.RemoteAddr)
+	if err != nil {
+		http.Error(rw, "Internal error", http.StatusInternalServerError)
+		logger.Errorf("invalid remote address %s: %s", r.RemoteAddr, err)
+		return
+	}
+	idx := hashIP(ip) % uint32(len(impl.pool))
+	if !impl.pool[idx].available.Load() {
+		http.Error(rw, "Service unavailable", http.StatusServiceUnavailable)
+	}
+	impl.pool[idx].handler.ServeHTTP(rw, r)
+}
+
+func hashIP(ip string) uint32 {
+	h := fnv.New32a()
+	h.Write([]byte(ip))
+	return h.Sum32()
+}

internal/net/http/loadbalancer/least_conn.go

@@ -0,0 +1,53 @@
+package loadbalancer
+
+import (
+	"net/http"
+	"sync/atomic"
+
+	F "github.com/yusing/go-proxy/internal/utils/functional"
+)
+
+type leastConn struct {
+	*LoadBalancer
+	nConn F.Map[*Server, *atomic.Int64]
+}
+
+func (lb *LoadBalancer) newLeastConn() impl {
+	return &leastConn{
+		LoadBalancer: lb,
+		nConn:        F.NewMapOf[*Server, *atomic.Int64](),
+	}
+}
+
+func (impl *leastConn) OnAddServer(srv *Server) {
+	impl.nConn.Store(srv, new(atomic.Int64))
+}
+
+func (impl *leastConn) OnRemoveServer(srv *Server) {
+	impl.nConn.Delete(srv)
+}
+
+func (impl *leastConn) ServeHTTP(srvs servers, rw http.ResponseWriter, r *http.Request) {
+	srv := srvs[0]
+	minConn, ok := impl.nConn.Load(srv)
+	if !ok {
+		logger.Errorf("[BUG] server %s not found", srv.Name)
+		http.Error(rw, "Internal error", http.StatusInternalServerError)
+	}
+
+	for i := 1; i < len(srvs); i++ {
+		nConn, ok := impl.nConn.Load(srvs[i])
+		if !ok {
+			logger.Errorf("[BUG] server %s not found", srv.Name)
+			http.Error(rw, "Internal error", http.StatusInternalServerError)
+		}
+		if nConn.Load() < minConn.Load() {
+			minConn = nConn
+			srv = srvs[i]
+		}
+	}
+
+	minConn.Add(1)
+	srv.handler.ServeHTTP(rw, r)
+	minConn.Add(-1)
+}

internal/net/http/loadbalancer/loadbalancer.go

@@ -0,0 +1,238 @@
+package loadbalancer
+
+import (
+	"context"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/go-acme/lego/v4/log"
+	E "github.com/yusing/go-proxy/internal/error"
+)
+
+// TODO: stats of each server.
+// TODO: support weighted mode.
+type (
+	impl interface {
+		ServeHTTP(srvs servers, rw http.ResponseWriter, r *http.Request)
+		OnAddServer(srv *Server)
+		OnRemoveServer(srv *Server)
+	}
+	Config struct {
+		Link   string
+		Mode   Mode
+		Weight weightType
+	}
+	LoadBalancer struct {
+		impl
+		Config
+
+		pool   servers
+		poolMu sync.RWMutex
+
+		ctx    context.Context
+		cancel context.CancelFunc
+		done   chan struct{}
+
+		sumWeight weightType
+	}
+
+	weightType uint16
+)
+
+const maxWeight weightType = 100
+
+func New(cfg Config) *LoadBalancer {
+	lb := &LoadBalancer{Config: cfg, pool: servers{}}
+	mode := cfg.Mode
+	if !cfg.Mode.ValidateUpdate() {
+		logger.Warnf("loadbalancer %s: invalid mode %q, fallback to %s", cfg.Link, mode, cfg.Mode)
+	}
+	switch mode {
+	case RoundRobin:
+		lb.impl = lb.newRoundRobin()
+	case LeastConn:
+		lb.impl = lb.newLeastConn()
+	case IPHash:
+		lb.impl = lb.newIPHash()
+	default: // should happen in test only
+		lb.impl = lb.newRoundRobin()
+	}
+	return lb
+}
+
+func (lb *LoadBalancer) AddServer(srv *Server) {
+	lb.poolMu.Lock()
+	defer lb.poolMu.Unlock()
+
+	lb.pool = append(lb.pool, srv)
+	lb.sumWeight += srv.Weight
+
+	lb.impl.OnAddServer(srv)
+	logger.Debugf("[add] loadbalancer %s: %d servers available", lb.Link, len(lb.pool))
+}
+
+func (lb *LoadBalancer) RemoveServer(srv *Server) {
+	lb.poolMu.RLock()
+	defer lb.poolMu.RUnlock()
+
+	lb.impl.OnRemoveServer(srv)
+
+	for i, s := range lb.pool {
+		if s == srv {
+			lb.pool = append(lb.pool[:i], lb.pool[i+1:]...)
+			break
+		}
+	}
+	if lb.IsEmpty() {
+		lb.Stop()
+		return
+	}
+
+	lb.Rebalance()
+	logger.Debugf("[remove] loadbalancer %s: %d servers left", lb.Link, len(lb.pool))
+}
+
+func (lb *LoadBalancer) IsEmpty() bool {
+	return len(lb.pool) == 0
+}
+
+func (lb *LoadBalancer) Rebalance() {
+	if lb.sumWeight == maxWeight {
+		return
+	}
+	if lb.sumWeight == 0 { // distribute evenly
+		weightEach := maxWeight / weightType(len(lb.pool))
+		remainder := maxWeight % weightType(len(lb.pool))
+		for _, s := range lb.pool {
+			s.Weight = weightEach
+			lb.sumWeight += weightEach
+			if remainder > 0 {
+				s.Weight++
+				remainder--
+			}
+		}
+		return
+	}
+
+	// scale evenly
+	scaleFactor := float64(maxWeight) / float64(lb.sumWeight)
+	lb.sumWeight = 0
+
+	for _, s := range lb.pool {
+		s.Weight = weightType(float64(s.Weight) * scaleFactor)
+		lb.sumWeight += s.Weight
+	}
+
+	delta := maxWeight - lb.sumWeight
+	if delta == 0 {
+		return
+	}
+	for _, s := range lb.pool {
+		if delta == 0 {
+			break
+		}
+		if delta > 0 {
+			s.Weight++
+			lb.sumWeight++
+			delta--
+		} else {
+			s.Weight--
+			lb.sumWeight--
+			delta++
+		}
+	}
+}
+
+func (lb *LoadBalancer) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	srvs := lb.availServers()
+	if len(srvs) == 0 {
+		http.Error(rw, "Service unavailable", http.StatusServiceUnavailable)
+		return
+	}
+	lb.impl.ServeHTTP(srvs, rw, r)
+}
+
+func (lb *LoadBalancer) Start() {
+	if lb.sumWeight != 0 && lb.sumWeight != maxWeight {
+		msg := E.NewBuilder("loadbalancer %s total weight %d != %d", lb.Link, lb.sumWeight, maxWeight)
+		for _, s := range lb.pool {
+			msg.Addf("%s: %d", s.Name, s.Weight)
+		}
+		lb.Rebalance()
+		inner := E.NewBuilder("after rebalancing")
+		for _, s := range lb.pool {
+			inner.Addf("%s: %d", s.Name, s.Weight)
+		}
+		msg.Addf("%s", inner)
+		logger.Warn(msg)
+	}
+
+	if lb.sumWeight != 0 {
+		log.Warnf("weighted mode not supported yet")
+	}
+
+	lb.done = make(chan struct{}, 1)
+	lb.ctx, lb.cancel = context.WithCancel(context.Background())
+
+	updateAll := func() {
+		lb.poolMu.Lock()
+		defer lb.poolMu.Unlock()
+
+		var wg sync.WaitGroup
+		wg.Add(len(lb.pool))
+		for _, s := range lb.pool {
+			go func(s *Server) {
+				defer wg.Done()
+				s.checkUpdateAvail(lb.ctx)
+			}(s)
+		}
+		wg.Wait()
+	}
+
+	logger.Debugf("loadbalancer %s started", lb.Link)
+
+	go func() {
+		defer lb.cancel()
+		defer close(lb.done)
+
+		ticker := time.NewTicker(5 * time.Second)
+		defer ticker.Stop()
+
+		updateAll()
+		for {
+			select {
+			case <-lb.ctx.Done():
+				return
+			case <-ticker.C:
+				updateAll()
+			}
+		}
+	}()
+}
+
+func (lb *LoadBalancer) Stop() {
+	if lb.cancel == nil {
+		return
+	}
+
+	lb.cancel()
+
+	<-lb.done
+	lb.pool = nil
+
+	logger.Debugf("loadbalancer %s stopped", lb.Link)
+}
+
+func (lb *LoadBalancer) availServers() servers {
+	lb.poolMu.Lock()
+	defer lb.poolMu.Unlock()
+
+	avail := servers{}
+	for _, s := range lb.pool {
+		if s.available.Load() {
+			avail = append(avail, s)
+		}
+	}
+	return avail
+}

internal/net/http/loadbalancer/loadbalancer_test.go

@@ -0,0 +1,43 @@
+package loadbalancer
+
+import (
+	"testing"
+
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+func TestRebalance(t *testing.T) {
+	t.Parallel()
+	t.Run("zero", func(t *testing.T) {
+		lb := New(Config{})
+		for range 10 {
+			lb.AddServer(&Server{})
+		}
+		lb.Rebalance()
+		ExpectEqual(t, lb.sumWeight, maxWeight)
+	})
+	t.Run("less", func(t *testing.T) {
+		lb := New(Config{})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .1)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .2)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .3)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .2)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .1)})
+		lb.Rebalance()
+		// t.Logf("%s", U.Must(json.MarshalIndent(lb.pool, "", "  ")))
+		ExpectEqual(t, lb.sumWeight, maxWeight)
+	})
+	t.Run("more", func(t *testing.T) {
+		lb := New(Config{})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .1)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .2)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .3)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .4)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .3)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .2)})
+		lb.AddServer(&Server{Weight: weightType(float64(maxWeight) * .1)})
+		lb.Rebalance()
+		// t.Logf("%s", U.Must(json.MarshalIndent(lb.pool, "", "  ")))
+		ExpectEqual(t, lb.sumWeight, maxWeight)
+	})
+}

internal/net/http/loadbalancer/logger.go

@@ -0,0 +1,5 @@
+package loadbalancer
+
+import "github.com/sirupsen/logrus"
+
+var logger = logrus.WithField("module", "load_balancer")

internal/net/http/loadbalancer/mode.go

@@ -0,0 +1,29 @@
+package loadbalancer
+
+import (
+	U "github.com/yusing/go-proxy/internal/utils"
+)
+
+type Mode string
+
+const (
+	RoundRobin Mode = "roundrobin"
+	LeastConn  Mode = "leastconn"
+	IPHash     Mode = "iphash"
+)
+
+func (mode *Mode) ValidateUpdate() bool {
+	switch U.ToLowerNoSnake(string(*mode)) {
+	case "", string(RoundRobin):
+		*mode = RoundRobin
+		return true
+	case string(LeastConn):
+		*mode = LeastConn
+		return true
+	case string(IPHash):
+		*mode = IPHash
+		return true
+	}
+	*mode = RoundRobin
+	return false
+}

internal/net/http/loadbalancer/round_robin.go

@@ -0,0 +1,22 @@
+package loadbalancer
+
+import (
+	"net/http"
+	"sync/atomic"
+)
+
+type roundRobin struct {
+	index atomic.Uint32
+}
+
+func (*LoadBalancer) newRoundRobin() impl         { return &roundRobin{} }
+func (lb *roundRobin) OnAddServer(srv *Server)    {}
+func (lb *roundRobin) OnRemoveServer(srv *Server) {}
+
+func (lb *roundRobin) ServeHTTP(srvs servers, rw http.ResponseWriter, r *http.Request) {
+	index := lb.index.Add(1)
+	srvs[index%uint32(len(srvs))].handler.ServeHTTP(rw, r)
+	if lb.index.Load() >= 2*uint32(len(srvs)) {
+		lb.index.Store(0)
+	}
+}

internal/net/http/loadbalancer/server.go

@@ -0,0 +1,67 @@
+package loadbalancer
+
+import (
+	"context"
+	"net/http"
+	"sync/atomic"
+	"time"
+
+	"github.com/yusing/go-proxy/internal/net/types"
+)
+
+type (
+	Server struct {
+		Name    string
+		URL     types.URL
+		Weight  weightType
+		handler http.Handler
+
+		pinger    *http.Client
+		available atomic.Bool
+	}
+	servers []*Server
+)
+
+func NewServer(name string, url types.URL, weight weightType, handler http.Handler) *Server {
+	srv := &Server{
+		Name:    name,
+		URL:     url,
+		Weight:  weight,
+		handler: handler,
+		pinger:  &http.Client{Timeout: 3 * time.Second},
+	}
+	srv.available.Store(true)
+	return srv
+}
+
+func (srv *Server) checkUpdateAvail(ctx context.Context) {
+	req, err := http.NewRequestWithContext(
+		ctx,
+		http.MethodHead,
+		srv.URL.String(),
+		nil,
+	)
+	if err != nil {
+		logger.Error("failed to create request: ", err)
+		srv.available.Store(false)
+	}
+
+	resp, err := srv.pinger.Do(req)
+	if err == nil && resp.StatusCode != http.StatusServiceUnavailable {
+		if !srv.available.Swap(true) {
+			logger.Infof("server %s is up", srv.Name)
+		}
+	} else if err != nil {
+		if srv.available.Swap(false) {
+			logger.Warnf("server %s is down: %s", srv.Name, err)
+		}
+	} else {
+		if srv.available.Swap(false) {
+			logger.Warnf("server %s is down: status %s", srv.Name, resp.Status)
+		}
+	}
+}
+
+func (srv *Server) String() string {
+	return srv.Name
+}

internal/net/http/middleware/cidr_whitelist.go

@@ -0,0 +1,83 @@
+package middleware
+
+import (
+	"net"
+	"net/http"
+
+	E "github.com/yusing/go-proxy/internal/error"
+	"github.com/yusing/go-proxy/internal/net/types"
+	F "github.com/yusing/go-proxy/internal/utils/functional"
+)
+
+type cidrWhitelist struct {
+	*cidrWhitelistOpts
+	m *Middleware
+}
+
+type cidrWhitelistOpts struct {
+	Allow      []*types.CIDR
+	StatusCode int
+	Message    string
+
+	cachedAddr F.Map[string, bool] // cache for trusted IPs
+}
+
+var CIDRWhiteList = &cidrWhitelist{
+	m: &Middleware{withOptions: NewCIDRWhitelist},
+}
+
+var cidrWhitelistDefaults = func() *cidrWhitelistOpts {
+	return &cidrWhitelistOpts{
+		Allow:      []*types.CIDR{},
+		StatusCode: http.StatusForbidden,
+		Message:    "IP not allowed",
+		cachedAddr: F.NewMapOf[string, bool](),
+	}
+}
+
+func NewCIDRWhitelist(opts OptionsRaw) (*Middleware, E.NestedError) {
+	wl := new(cidrWhitelist)
+	wl.m = &Middleware{
+		impl:   wl,
+		before: wl.checkIP,
+	}
+	wl.cidrWhitelistOpts = cidrWhitelistDefaults()
+	err := Deserialize(opts, wl.cidrWhitelistOpts)
+	if err != nil {
+		return nil, err
+	}
+	if len(wl.cidrWhitelistOpts.Allow) == 0 {
+		return nil, E.Missing("allow range")
+	}
+	return wl.m, nil
+}
+
+func (wl *cidrWhitelist) checkIP(next http.HandlerFunc, w ResponseWriter, r *Request) {
+	var allow, ok bool
+	if allow, ok = wl.cachedAddr.Load(r.RemoteAddr); !ok {
+		ipStr, _, err := net.SplitHostPort(r.RemoteAddr)
+		if err != nil {
+			ipStr = r.RemoteAddr
+		}
+		ip := net.ParseIP(ipStr)
+		for _, cidr := range wl.cidrWhitelistOpts.Allow {
+			if cidr.Contains(ip) {
+				wl.cachedAddr.Store(r.RemoteAddr, true)
+				allow = true
+				wl.m.AddTracef("client %s is allowed", ipStr).With("allowed CIDR", cidr)
+				break
+			}
+		}
+		if !allow {
+			wl.cachedAddr.Store(r.RemoteAddr, false)
+			wl.m.AddTracef("client %s is forbidden", ipStr).With("allowed CIDRs", wl.cidrWhitelistOpts.Allow)
+		}
+	}
+	if !allow {
+		w.WriteHeader(wl.StatusCode)
+		w.Write([]byte(wl.Message))
+		return
+	}
+
+	next(w, r)
+}

internal/net/http/middleware/cidr_whitelist_test.go

@@ -0,0 +1,42 @@
+package middleware
+
+import (
+	_ "embed"
+	"net/http"
+	"testing"
+
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+//go:embed test_data/cidr_whitelist_test.yml
+var testCIDRWhitelistCompose []byte
+var deny, accept *Middleware
+
+func TestCIDRWhitelist(t *testing.T) {
+	mids, err := BuildMiddlewaresFromYAML(testCIDRWhitelistCompose)
+	if err != nil {
+		panic(err)
+	}
+	deny = mids["deny@file"]
+	accept = mids["accept@file"]
+	if deny == nil || accept == nil {
+		panic("bug occurred")
+	}
+
+	t.Run("deny", func(t *testing.T) {
+		for range 10 {
+			result, err := newMiddlewareTest(deny, nil)
+			ExpectNoError(t, err.Error())
+			ExpectEqual(t, result.ResponseStatus, cidrWhitelistDefaults().StatusCode)
+			ExpectEqual(t, string(result.Data), cidrWhitelistDefaults().Message)
+		}
+	})
+
+	t.Run("accept", func(t *testing.T) {
+		for range 10 {
+			result, err := newMiddlewareTest(accept, nil)
+			ExpectNoError(t, err.Error())
+			ExpectEqual(t, result.ResponseStatus, http.StatusOK)
+		}
+	})
+}

internal/net/http/middleware/cloudflare_real_ip.go

@@ -0,0 +1,118 @@
+package middleware
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/yusing/go-proxy/internal/common"
+	E "github.com/yusing/go-proxy/internal/error"
+	"github.com/yusing/go-proxy/internal/net/types"
+)
+
+const (
+	cfIPv4CIDRsEndpoint        = "https://www.cloudflare.com/ips-v4"
+	cfIPv6CIDRsEndpoint        = "https://www.cloudflare.com/ips-v6"
+	cfCIDRsUpdateInterval      = time.Hour
+	cfCIDRsUpdateRetryInterval = 3 * time.Second
+)
+
+var (
+	cfCIDRsLastUpdate time.Time
+	cfCIDRsMu         sync.Mutex
+	cfCIDRsLogger     = logrus.WithField("middleware", "CloudflareRealIP")
+)
+
+var CloudflareRealIP = &realIP{
+	m: &Middleware{withOptions: NewCloudflareRealIP},
+}
+
+func NewCloudflareRealIP(_ OptionsRaw) (*Middleware, E.NestedError) {
+	cri := new(realIP)
+	cri.m = &Middleware{
+		impl: cri,
+		before: func(next http.HandlerFunc, w ResponseWriter, r *Request) {
+			cidrs := tryFetchCFCIDR()
+			if cidrs != nil {
+				cri.From = cidrs
+			}
+			cri.setRealIP(r)
+			next(w, r)
+		},
+	}
+	cri.realIPOpts = &realIPOpts{
+		Header:    "CF-Connecting-IP",
+		Recursive: true,
+	}
+	return cri.m, nil
+}
+
+func tryFetchCFCIDR() (cfCIDRs []*types.CIDR) {
+	if time.Since(cfCIDRsLastUpdate) < cfCIDRsUpdateInterval {
+		return
+	}
+
+	cfCIDRsMu.Lock()
+	defer cfCIDRsMu.Unlock()
+
+	if time.Since(cfCIDRsLastUpdate) < cfCIDRsUpdateInterval {
+		return
+	}
+
+	if common.IsTest {
+		cfCIDRs = []*types.CIDR{
+			{IP: net.IPv4(127, 0, 0, 1), Mask: net.IPv4Mask(255, 0, 0, 0)},
+			{IP: net.IPv4(10, 0, 0, 0), Mask: net.IPv4Mask(255, 0, 0, 0)},
+			{IP: net.IPv4(172, 16, 0, 0), Mask: net.IPv4Mask(255, 255, 0, 0)},
+			{IP: net.IPv4(192, 168, 0, 0), Mask: net.IPv4Mask(255, 255, 255, 0)},
+		}
+	} else {
+		cfCIDRs = make([]*types.CIDR, 0, 30)
+		err := errors.Join(
+			fetchUpdateCFIPRange(cfIPv4CIDRsEndpoint, cfCIDRs),
+			fetchUpdateCFIPRange(cfIPv6CIDRsEndpoint, cfCIDRs),
+		)
+		if err != nil {
+			cfCIDRsLastUpdate = time.Now().Add(-cfCIDRsUpdateRetryInterval - cfCIDRsUpdateInterval)
+			cfCIDRsLogger.Errorf("failed to update cloudflare range: %s, retry in %s", err, cfCIDRsUpdateRetryInterval)
+			return nil
+		}
+	}
+
+	cfCIDRsLastUpdate = time.Now()
+	cfCIDRsLogger.Debugf("cloudflare CIDR range updated")
+	return
+}
+
+func fetchUpdateCFIPRange(endpoint string, cfCIDRs []*types.CIDR) error {
+	resp, err := http.Get(endpoint)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+
+	for _, line := range strings.Split(string(body), "\n") {
+		if line == "" {
+			continue
+		}
+		_, cidr, err := net.ParseCIDR(line)
+		if err != nil {
+			return fmt.Errorf("cloudflare responeded an invalid CIDR: %s", line)
+		} else {
+			cfCIDRs = append(cfCIDRs, (*types.CIDR)(cidr))
+		}
+	}
+
+	return nil
+}

internal/net/http/middleware/custom_error_page.go

@@ -0,0 +1,77 @@
+package middleware
+
+import (
+	"bytes"
+	"io"
+	"net/http"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+	"github.com/yusing/go-proxy/internal/api/v1/errorpage"
+	gphttp "github.com/yusing/go-proxy/internal/net/http"
+)
+
+var CustomErrorPage = &Middleware{
+	before: func(next http.HandlerFunc, w ResponseWriter, r *Request) {
+		if !ServeStaticErrorPageFile(w, r) {
+			next(w, r)
+		}
+	},
+	modifyResponse: func(resp *Response) error {
+		// only handles non-success status code and html/plain content type
+		contentType := gphttp.GetContentType(resp.Header)
+		if !gphttp.IsSuccess(resp.StatusCode) && (contentType.IsHTML() || contentType.IsPlainText()) {
+			errorPage, ok := errorpage.GetErrorPageByStatus(resp.StatusCode)
+			if ok {
+				errPageLogger.Debugf("error page for status %d loaded", resp.StatusCode)
+				/* trunk-ignore(golangci-lint/errcheck) */
+				io.Copy(io.Discard, resp.Body) // drain the original body
+				resp.Body.Close()
+				resp.Body = io.NopCloser(bytes.NewReader(errorPage))
+				resp.ContentLength = int64(len(errorPage))
+				resp.Header.Set("Content-Length", strconv.Itoa(len(errorPage)))
+				resp.Header.Set("Content-Type", "text/html; charset=utf-8")
+			} else {
+				errPageLogger.Errorf("unable to load error page for status %d", resp.StatusCode)
+			}
+			return nil
+		}
+		return nil
+	},
+}
+
+func ServeStaticErrorPageFile(w http.ResponseWriter, r *http.Request) bool {
+	path := r.URL.Path
+	if path != "" && path[0] != '/' {
+		path = "/" + path
+	}
+	if strings.HasPrefix(path, gphttp.StaticFilePathPrefix) {
+		filename := path[len(gphttp.StaticFilePathPrefix):]
+		file, ok := errorpage.GetStaticFile(filename)
+		if !ok {
+			errPageLogger.Errorf("unable to load resource %s", filename)
+			return false
+		}
+		ext := filepath.Ext(filename)
+		switch ext {
+		case ".html":
+			w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		case ".js":
+			w.Header().Set("Content-Type", "application/javascript; charset=utf-8")
+		case ".css":
+			w.Header().Set("Content-Type", "text/css; charset=utf-8")
+		default:
+			errPageLogger.Errorf("unexpected file type %q for %s", ext, filename)
+		}
+		if _, err := w.Write(file); err != nil {
+			errPageLogger.WithError(err).Errorf("unable to write resource %s", filename)
+			http.Error(w, "Error page failure", http.StatusInternalServerError)
+		}
+		return true
+	}
+	return false
+}
+
+var errPageLogger = logrus.WithField("middleware", "error_page")

internal/net/http/middleware/forward_auth.go

@@ -0,0 +1,233 @@
+// Modified from Traefik Labs's MIT-licensed code (https://github.com/traefik/traefik/blob/master/pkg/middlewares/auth/forward.go)
+// Copyright (c) 2020-2024 Traefik Labs
+// Copyright (c) 2024 yusing
+
+package middleware
+
+import (
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"slices"
+	"strings"
+	"time"
+
+	E "github.com/yusing/go-proxy/internal/error"
+	gphttp "github.com/yusing/go-proxy/internal/net/http"
+)
+
+type (
+	forwardAuth struct {
+		*forwardAuthOpts
+		m      *Middleware
+		client http.Client
+	}
+	forwardAuthOpts struct {
+		Address                  string
+		TrustForwardHeader       bool
+		AuthResponseHeaders      []string
+		AddAuthCookiesToResponse []string
+		transport                http.RoundTripper
+	}
+)
+
+var ForwardAuth = &forwardAuth{
+	m: &Middleware{withOptions: NewForwardAuthfunc},
+}
+
+func NewForwardAuthfunc(optsRaw OptionsRaw) (*Middleware, E.NestedError) {
+	fa := new(forwardAuth)
+	fa.forwardAuthOpts = new(forwardAuthOpts)
+	err := Deserialize(optsRaw, fa.forwardAuthOpts)
+	if err != nil {
+		return nil, err
+	}
+	_, err = E.Check(url.Parse(fa.Address))
+	if err != nil {
+		return nil, E.Invalid("address", fa.Address)
+	}
+
+	fa.m = &Middleware{
+		impl:   fa,
+		before: fa.forward,
+	}
+
+	// TODO: use tr from reverse proxy
+	tr, ok := fa.transport.(*http.Transport)
+	if ok {
+		tr = tr.Clone()
+	} else {
+		tr = gphttp.DefaultTransport.Clone()
+	}
+
+	fa.client = http.Client{
+		CheckRedirect: func(r *Request, via []*Request) error {
+			return http.ErrUseLastResponse
+		},
+		Timeout:   30 * time.Second,
+		Transport: tr,
+	}
+	return fa.m, nil
+}
+
+func (fa *forwardAuth) forward(next http.HandlerFunc, w ResponseWriter, req *Request) {
+	gphttp.RemoveHop(req.Header)
+
+	faReq, err := http.NewRequestWithContext(
+		req.Context(),
+		http.MethodGet,
+		fa.Address,
+		nil,
+	)
+	if err != nil {
+		fa.m.AddTracef("new request err to %s", fa.Address).WithError(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	gphttp.CopyHeader(faReq.Header, req.Header)
+	gphttp.RemoveHop(faReq.Header)
+
+	faReq.Header = gphttp.FilterHeaders(faReq.Header, fa.AuthResponseHeaders)
+	fa.setAuthHeaders(req, faReq)
+	fa.m.AddTraceRequest("forward auth request", faReq)
+
+	faResp, err := fa.client.Do(faReq)
+	if err != nil {
+		fa.m.AddTracef("failed to call %s", fa.Address).WithError(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer faResp.Body.Close()
+
+	body, err := io.ReadAll(faResp.Body)
+	if err != nil {
+		fa.m.AddTracef("failed to read response body from %s", fa.Address).WithError(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	if faResp.StatusCode < http.StatusOK || faResp.StatusCode >= http.StatusMultipleChoices {
+		fa.m.AddTraceResponse("forward auth response", faResp)
+		gphttp.CopyHeader(w.Header(), faResp.Header)
+		gphttp.RemoveHop(w.Header())
+
+		redirectURL, err := faResp.Location()
+		if err != nil {
+			fa.m.AddTracef("failed to get location from %s", fa.Address).WithError(err).WithResponse(faResp)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		} else if redirectURL.String() != "" {
+			w.Header().Set("Location", redirectURL.String())
+			fa.m.AddTracef("redirect to %q", redirectURL.String()).WithResponse(faResp)
+		}
+
+		w.WriteHeader(faResp.StatusCode)
+
+		if _, err = w.Write(body); err != nil {
+			fa.m.AddTracef("failed to write response body from %s", fa.Address).WithError(err).WithResponse(faResp)
+		}
+		return
+	}
+
+	for _, key := range fa.AuthResponseHeaders {
+		key := http.CanonicalHeaderKey(key)
+		req.Header.Del(key)
+		if len(faResp.Header[key]) > 0 {
+			req.Header[key] = append([]string(nil), faResp.Header[key]...)
+		}
+	}
+
+	req.RequestURI = req.URL.RequestURI()
+
+	authCookies := faResp.Cookies()
+
+	if len(authCookies) == 0 {
+		next.ServeHTTP(w, req)
+		return
+	}
+
+	next.ServeHTTP(gphttp.NewModifyResponseWriter(w, req, func(resp *Response) error {
+		fa.setAuthCookies(resp, authCookies)
+		return nil
+	}), req)
+}
+
+func (fa *forwardAuth) setAuthCookies(resp *Response, authCookies []*Cookie) {
+	if len(fa.AddAuthCookiesToResponse) == 0 {
+		return
+	}
+
+	cookies := resp.Cookies()
+	resp.Header.Del("Set-Cookie")
+
+	for _, cookie := range cookies {
+		if !slices.Contains(fa.AddAuthCookiesToResponse, cookie.Name) {
+			// this cookie is not an auth cookie, so add it back
+			resp.Header.Add("Set-Cookie", cookie.String())
+		}
+	}
+
+	for _, cookie := range authCookies {
+		if slices.Contains(fa.AddAuthCookiesToResponse, cookie.Name) {
+			// this cookie is an auth cookie, so add to resp
+			resp.Header.Add("Set-Cookie", cookie.String())
+		}
+	}
+}
+
+func (fa *forwardAuth) setAuthHeaders(req, faReq *Request) {
+	if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
+		if fa.TrustForwardHeader {
+			if prior, ok := req.Header[xForwardedFor]; ok {
+				clientIP = strings.Join(prior, ", ") + ", " + clientIP
+			}
+		}
+		faReq.Header.Set(xForwardedFor, clientIP)
+	}
+
+	xMethod := req.Header.Get(xForwardedMethod)
+	switch {
+	case xMethod != "" && fa.TrustForwardHeader:
+		faReq.Header.Set(xForwardedMethod, xMethod)
+	case req.Method != "":
+		faReq.Header.Set(xForwardedMethod, req.Method)
+	default:
+		faReq.Header.Del(xForwardedMethod)
+	}
+
+	xfp := req.Header.Get(xForwardedProto)
+	switch {
+	case xfp != "" && fa.TrustForwardHeader:
+		faReq.Header.Set(xForwardedProto, xfp)
+	case req.TLS != nil:
+		faReq.Header.Set(xForwardedProto, "https")
+	default:
+		faReq.Header.Set(xForwardedProto, "http")
+	}
+
+	if xfp := req.Header.Get(xForwardedPort); xfp != "" && fa.TrustForwardHeader {
+		faReq.Header.Set(xForwardedPort, xfp)
+	}
+
+	xfh := req.Header.Get(xForwardedHost)
+	switch {
+	case xfh != "" && fa.TrustForwardHeader:
+		faReq.Header.Set(xForwardedHost, xfh)
+	case req.Host != "":
+		faReq.Header.Set(xForwardedHost, req.Host)
+	default:
+		faReq.Header.Del(xForwardedHost)
+	}
+
+	xfURI := req.Header.Get(xForwardedURI)
+	switch {
+	case xfURI != "" && fa.TrustForwardHeader:
+		faReq.Header.Set(xForwardedURI, xfURI)
+	case req.URL.RequestURI() != "":
+		faReq.Header.Set(xForwardedURI, req.URL.RequestURI())
+	default:
+		faReq.Header.Del(xForwardedURI)
+	}
+}

internal/net/http/middleware/middleware.go

@@ -0,0 +1,155 @@
+package middleware
+
+import (
+	"encoding/json"
+	"errors"
+	"net/http"
+
+	E "github.com/yusing/go-proxy/internal/error"
+	gphttp "github.com/yusing/go-proxy/internal/net/http"
+	U "github.com/yusing/go-proxy/internal/utils"
+)
+
+type (
+	Error = E.NestedError
+
+	ReverseProxy   = gphttp.ReverseProxy
+	ProxyRequest   = gphttp.ProxyRequest
+	Request        = http.Request
+	Response       = http.Response
+	ResponseWriter = http.ResponseWriter
+	Header         = http.Header
+	Cookie         = http.Cookie
+
+	BeforeFunc         func(next http.HandlerFunc, w ResponseWriter, r *Request)
+	RewriteFunc        func(req *Request)
+	ModifyResponseFunc func(resp *Response) error
+	CloneWithOptFunc   func(opts OptionsRaw) (*Middleware, E.NestedError)
+
+	OptionsRaw = map[string]any
+	Options    any
+
+	Middleware struct {
+		name string
+
+		before         BeforeFunc         // runs before ReverseProxy.ServeHTTP
+		modifyResponse ModifyResponseFunc // runs after ReverseProxy.ModifyResponse
+
+		withOptions CloneWithOptFunc
+		impl        any
+
+		parent   *Middleware
+		children []*Middleware
+		trace    bool
+	}
+)
+
+var Deserialize = U.Deserialize
+
+func Rewrite(r RewriteFunc) BeforeFunc {
+	return func(next http.HandlerFunc, w ResponseWriter, req *Request) {
+		r(req)
+		next(w, req)
+	}
+}
+
+func (m *Middleware) Name() string {
+	return m.name
+}
+
+func (m *Middleware) Fullname() string {
+	if m.parent != nil {
+		return m.parent.Fullname() + "." + m.name
+	}
+	return m.name
+}
+
+func (m *Middleware) String() string {
+	return m.name
+}
+
+func (m *Middleware) MarshalJSON() ([]byte, error) {
+	return json.MarshalIndent(map[string]any{
+		"name":    m.name,
+		"options": m.impl,
+	}, "", "  ")
+}
+
+func (m *Middleware) WithOptionsClone(optsRaw OptionsRaw) (*Middleware, E.NestedError) {
+	if len(optsRaw) != 0 && m.withOptions != nil {
+		if mWithOpt, err := m.withOptions(optsRaw); err != nil {
+			return nil, err
+		} else {
+			return mWithOpt, nil
+		}
+	}
+
+	// WithOptionsClone is called only once
+	// set withOptions and labelParser will not be used after that
+	return &Middleware{
+		m.name,
+		m.before,
+		m.modifyResponse,
+		nil,
+		m.impl,
+		m.parent,
+		m.children,
+		false,
+	}, nil
+}
+
+// TODO: check conflict or duplicates
+func PatchReverseProxy(rpName string, rp *ReverseProxy, middlewaresMap map[string]OptionsRaw) (res E.NestedError) {
+	middlewares := make([]*Middleware, 0, len(middlewaresMap))
+
+	invalidM := E.NewBuilder("invalid middlewares")
+	invalidOpts := E.NewBuilder("invalid options")
+	defer func() {
+		invalidM.Add(invalidOpts.Build())
+		invalidM.To(&res)
+	}()
+
+	for name, opts := range middlewaresMap {
+		m, ok := Get(name)
+		if !ok {
+			invalidM.Add(E.NotExist("middleware", name))
+			continue
+		}
+
+		m, err := m.WithOptionsClone(opts)
+		if err != nil {
+			invalidOpts.Add(err.Subject(name))
+			continue
+		}
+		middlewares = append(middlewares, m)
+	}
+
+	if invalidM.HasError() {
+		return
+	}
+
+	patchReverseProxy(rpName, rp, middlewares)
+	return
+}
+
+func patchReverseProxy(rpName string, rp *ReverseProxy, middlewares []*Middleware) {
+	mid := BuildMiddlewareFromChain(rpName, middlewares)
+
+	if mid.before != nil {
+		ori := rp.ServeHTTP
+		rp.ServeHTTP = func(w http.ResponseWriter, r *http.Request) {
+			mid.before(ori, w, r)
+		}
+	}
+
+	if mid.modifyResponse != nil {
+		if rp.ModifyResponse != nil {
+			ori := rp.ModifyResponse
+			rp.ModifyResponse = func(res *http.Response) error {
+				return errors.Join(mid.modifyResponse(res), ori(res))
+			}
+		} else {
+			rp.ModifyResponse = mid.modifyResponse
+		}
+	}
+}

internal/net/http/middleware/middleware_builder.go

@@ -0,0 +1,114 @@
+package middleware
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/yusing/go-proxy/internal/common"
+	E "github.com/yusing/go-proxy/internal/error"
+	"gopkg.in/yaml.v3"
+)
+
+func BuildMiddlewaresFromComposeFile(filePath string) (map[string]*Middleware, E.NestedError) {
+	fileContent, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, E.FailWith("read middleware compose file", err)
+	}
+	return BuildMiddlewaresFromYAML(fileContent)
+}
+
+func BuildMiddlewaresFromYAML(data []byte) (middlewares map[string]*Middleware, outErr E.NestedError) {
+	b := E.NewBuilder("middlewares compile errors")
+	defer b.To(&outErr)
+
+	var rawMap map[string][]map[string]any
+	err := yaml.Unmarshal(data, &rawMap)
+	if err != nil {
+		b.Add(E.FailWith("yaml unmarshal", err))
+		return
+	}
+	middlewares = make(map[string]*Middleware)
+	for name, defs := range rawMap {
+		chainErr := E.NewBuilder("%s", name)
+		chain := make([]*Middleware, 0, len(defs))
+		for i, def := range defs {
+			if def["use"] == nil || def["use"] == "" {
+				chainErr.Add(E.Missing("use").Subjectf(".%d", i))
+				continue
+			}
+			baseName := def["use"].(string)
+			base, ok := Get(baseName)
+			if !ok {
+				base, ok = middlewares[baseName]
+				if !ok {
+					chainErr.Add(E.NotExist("middleware", baseName).Subjectf(".%d", i))
+					continue
+				}
+			}
+			delete(def, "use")
+			m, err := base.WithOptionsClone(def)
+			m.name = fmt.Sprintf("%s[%d]", name, i)
+			if err != nil {
+				chainErr.Add(err.Subjectf("item%d", i))
+				continue
+			}
+			chain = append(chain, m)
+		}
+		if chainErr.HasError() {
+			b.Add(chainErr.Build())
+		} else {
+			middlewares[name+"@file"] = BuildMiddlewareFromChain(name, chain)
+		}
+	}
+	return
+}
+
+// TODO: check conflict or duplicates.
+func BuildMiddlewareFromChain(name string, chain []*Middleware) *Middleware {
+	m := &Middleware{name: name, children: chain}
+
+	var befores []*Middleware
+	var modResps []*Middleware
+
+	for _, comp := range chain {
+		if comp.before != nil {
+			befores = append(befores, comp)
+		}
+		if comp.modifyResponse != nil {
+			modResps = append(modResps, comp)
+		}
+		comp.parent = m
+	}
+
+	if len(befores) > 0 {
+		m.before = buildBefores(befores)
+	}
+	if len(modResps) > 0 {
+		m.modifyResponse = func(res *Response) error {
+			b := E.NewBuilder("errors in middleware")
+			for _, mr := range modResps {
+				b.Add(E.From(mr.modifyResponse(res)).Subject(mr.name))
+			}
+			return b.Build().Error()
+		}
+	}
+
+	if common.IsDebug {
+		m.EnableTrace()
+		m.AddTracef("middleware created")
+	}
+	return m
+}
+
+func buildBefores(befores []*Middleware) BeforeFunc {
+	if len(befores) == 1 {
+		return befores[0].before
+	}
+	nextBefores := buildBefores(befores[1:])
+	return func(next http.HandlerFunc, w ResponseWriter, r *Request) {
+		befores[0].before(func(w ResponseWriter, r *Request) {
+			nextBefores(next, w, r)
+		}, w, r)
+	}
+}

internal/net/http/middleware/middleware_builder_test.go

@@ -0,0 +1,22 @@
+package middleware
+
+import (
+	_ "embed"
+	"encoding/json"
+	"testing"
+
+	E "github.com/yusing/go-proxy/internal/error"
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+//go:embed test_data/middleware_compose.yml
+var testMiddlewareCompose []byte
+
+func TestBuild(t *testing.T) {
+	middlewares, err := BuildMiddlewaresFromYAML(testMiddlewareCompose)
+	ExpectNoError(t, err.Error())
+	_, err = E.Check(json.MarshalIndent(middlewares, "", "  "))
+	ExpectNoError(t, err.Error())
+	// t.Log(string(data))
+	// TODO: test
+}

internal/net/http/middleware/middlewares.go

@@ -0,0 +1,81 @@
+package middleware
+
+import (
+	"fmt"
+	"net/http"
+	"path"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+	"github.com/yusing/go-proxy/internal/common"
+	E "github.com/yusing/go-proxy/internal/error"
+	U "github.com/yusing/go-proxy/internal/utils"
+)
+
+var middlewares map[string]*Middleware
+
+func Get(name string) (middleware *Middleware, ok bool) {
+	middleware, ok = middlewares[U.ToLowerNoSnake(name)]
+	return
+}
+
+func All() map[string]*Middleware {
+	return middlewares
+}
+
+// initialize middleware names and label parsers
+func init() {
+	middlewares = map[string]*Middleware{
+		"setxforwarded":    SetXForwarded,
+		"hidexforwarded":   HideXForwarded,
+		"redirecthttp":     RedirectHTTP,
+		"modifyresponse":   ModifyResponse.m,
+		"modifyrequest":    ModifyRequest.m,
+		"errorpage":        CustomErrorPage,
+		"customerrorpage":  CustomErrorPage,
+		"realip":           RealIP.m,
+		"cloudflarerealip": CloudflareRealIP.m,
+		"cidrwhitelist":    CIDRWhiteList.m,
+
+		// !experimental
+		"forwardauth": ForwardAuth.m,
+		"oauth2":      OAuth2.m,
+	}
+	names := make(map[*Middleware][]string)
+	for name, m := range middlewares {
+		names[m] = append(names[m], http.CanonicalHeaderKey(name))
+	}
+	for m, names := range names {
+		if len(names) > 1 {
+			m.name = fmt.Sprintf("%s (a.k.a. %s)", names[0], strings.Join(names[1:], ", "))
+		} else {
+			m.name = names[0]
+		}
+	}
+}
+
+func LoadComposeFiles() {
+	b := E.NewBuilder("failed to load middlewares")
+	middlewareDefs, err := U.ListFiles(common.MiddlewareComposeBasePath, 0)
+	if err != nil {
+		logrus.Errorf("failed to list middleware definitions: %s", err)
+		return
+	}
+	for _, defFile := range middlewareDefs {
+		mws, err := BuildMiddlewaresFromComposeFile(defFile)
+		for name, m := range mws {
+			if _, ok := middlewares[name]; ok {
+				b.Add(E.Duplicated("middleware", name))
+				continue
+			}
+			middlewares[U.ToLowerNoSnake(name)] = m
+			logger.Infof("middleware %s loaded from %s", name, path.Base(defFile))
+		}
+		b.Add(err.Subject(path.Base(defFile)))
+	}
+	if b.HasError() {
+		logger.Error(b.Build())
+	}
+}
+
+var logger = logrus.WithField("module", "middlewares")

internal/net/http/middleware/modify_request.go

@@ -0,0 +1,61 @@
+package middleware
+
+import (
+	"github.com/yusing/go-proxy/internal/common"
+	E "github.com/yusing/go-proxy/internal/error"
+)
+
+type (
+	modifyRequest struct {
+		*modifyRequestOpts
+		m *Middleware
+	}
+	// order: set_headers -> add_headers -> hide_headers
+	modifyRequestOpts struct {
+		SetHeaders  map[string]string
+		AddHeaders  map[string]string
+		HideHeaders []string
+	}
+)
+
+var ModifyRequest = &modifyRequest{
+	m: &Middleware{withOptions: NewModifyRequest},
+}
+
+func NewModifyRequest(optsRaw OptionsRaw) (*Middleware, E.NestedError) {
+	mr := new(modifyRequest)
+	var mrFunc RewriteFunc
+	if common.IsDebug {
+		mrFunc = mr.modifyRequestWithTrace
+	} else {
+		mrFunc = mr.modifyRequest
+	}
+	mr.m = &Middleware{
+		impl:   mr,
+		before: Rewrite(mrFunc),
+	}
+	mr.modifyRequestOpts = new(modifyRequestOpts)
+	err := Deserialize(optsRaw, mr.modifyRequestOpts)
+	if err != nil {
+		return nil, err
+	}
+	return mr.m, nil
+}
+
+func (mr *modifyRequest) modifyRequest(req *Request) {
+	for k, v := range mr.SetHeaders {
+		req.Header.Set(k, v)
+	}
+	for k, v := range mr.AddHeaders {
+		req.Header.Add(k, v)
+	}
+	for _, k := range mr.HideHeaders {
+		req.Header.Del(k)
+	}
+}
+
+func (mr *modifyRequest) modifyRequestWithTrace(req *Request) {
+	mr.m.AddTraceRequest("before modify request", req)
+	mr.modifyRequest(req)
+	mr.m.AddTraceRequest("after modify request", req)
+}

internal/net/http/middleware/modify_request_test.go

@@ -0,0 +1,34 @@
+package middleware
+
+import (
+	"slices"
+	"testing"
+
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+func TestSetModifyRequest(t *testing.T) {
+	opts := OptionsRaw{
+		"set_headers":  map[string]string{"User-Agent": "go-proxy/v0.5.0"},
+		"add_headers":  map[string]string{"Accept-Encoding": "test-value"},
+		"hide_headers": []string{"Accept"},
+	}
+
+	t.Run("set_options", func(t *testing.T) {
+		mr, err := ModifyRequest.m.WithOptionsClone(opts)
+		ExpectNoError(t, err.Error())
+		ExpectDeepEqual(t, mr.impl.(*modifyRequest).SetHeaders, opts["set_headers"].(map[string]string))
+		ExpectDeepEqual(t, mr.impl.(*modifyRequest).AddHeaders, opts["add_headers"].(map[string]string))
+		ExpectDeepEqual(t, mr.impl.(*modifyRequest).HideHeaders, opts["hide_headers"].([]string))
+	})
+
+	t.Run("request_headers", func(t *testing.T) {
+		result, err := newMiddlewareTest(ModifyRequest.m, &testArgs{
+			middlewareOpt: opts,
+		})
+		ExpectNoError(t, err.Error())
+		ExpectEqual(t, result.RequestHeaders.Get("User-Agent"), "go-proxy/v0.5.0")
+		ExpectTrue(t, slices.Contains(result.RequestHeaders.Values("Accept-Encoding"), "test-value"))
+		ExpectEqual(t, result.RequestHeaders.Get("Accept"), "")
+	})
+}

internal/net/http/middleware/modify_response.go

@@ -0,0 +1,61 @@
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/yusing/go-proxy/internal/common"
+	E "github.com/yusing/go-proxy/internal/error"
+)
+
+type (
+	modifyResponse struct {
+		*modifyResponseOpts
+		m *Middleware
+	}
+	// order: set_headers -> add_headers -> hide_headers
+	modifyResponseOpts struct {
+		SetHeaders  map[string]string
+		AddHeaders  map[string]string
+		HideHeaders []string
+	}
+)
+
+var ModifyResponse = &modifyResponse{
+	m: &Middleware{withOptions: NewModifyResponse},
+}
+
+func NewModifyResponse(optsRaw OptionsRaw) (*Middleware, E.NestedError) {
+	mr := new(modifyResponse)
+	mr.m = &Middleware{impl: mr}
+	if common.IsDebug {
+		mr.m.modifyResponse = mr.modifyResponseWithTrace
+	} else {
+		mr.m.modifyResponse = mr.modifyResponse
+	}
+	mr.modifyResponseOpts = new(modifyResponseOpts)
+	err := Deserialize(optsRaw, mr.modifyResponseOpts)
+	if err != nil {
+		return nil, err
+	}
+	return mr.m, nil
+}
+
+func (mr *modifyResponse) modifyResponse(resp *http.Response) error {
+	for k, v := range mr.SetHeaders {
+		resp.Header.Set(k, v)
+	}
+	for k, v := range mr.AddHeaders {
+		resp.Header.Add(k, v)
+	}
+	for _, k := range mr.HideHeaders {
+		resp.Header.Del(k)
+	}
+	return nil
+}
+
+func (mr *modifyResponse) modifyResponseWithTrace(resp *http.Response) error {
+	mr.m.AddTraceResponse("before modify response", resp)
+	err := mr.modifyResponse(resp)
+	mr.m.AddTraceResponse("after modify response", resp)
+	return err
+}

internal/net/http/middleware/modify_response_test.go

@@ -0,0 +1,35 @@
+package middleware
+
+import (
+	"slices"
+	"testing"
+
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+func TestSetModifyResponse(t *testing.T) {
+	opts := OptionsRaw{
+		"set_headers":  map[string]string{"User-Agent": "go-proxy/v0.5.0"},
+		"add_headers":  map[string]string{"Accept-Encoding": "test-value"},
+		"hide_headers": []string{"Accept"},
+	}
+
+	t.Run("set_options", func(t *testing.T) {
+		mr, err := ModifyResponse.m.WithOptionsClone(opts)
+		ExpectNoError(t, err.Error())
+		ExpectDeepEqual(t, mr.impl.(*modifyResponse).SetHeaders, opts["set_headers"].(map[string]string))
+		ExpectDeepEqual(t, mr.impl.(*modifyResponse).AddHeaders, opts["add_headers"].(map[string]string))
+		ExpectDeepEqual(t, mr.impl.(*modifyResponse).HideHeaders, opts["hide_headers"].([]string))
+	})
+
+	t.Run("request_headers", func(t *testing.T) {
+		result, err := newMiddlewareTest(ModifyResponse.m, &testArgs{
+			middlewareOpt: opts,
+		})
+		ExpectNoError(t, err.Error())
+		ExpectEqual(t, result.ResponseHeaders.Get("User-Agent"), "go-proxy/v0.5.0")
+		t.Log(result.ResponseHeaders.Get("Accept-Encoding"))
+		ExpectTrue(t, slices.Contains(result.ResponseHeaders.Values("Accept-Encoding"), "test-value"))
+		ExpectEqual(t, result.ResponseHeaders.Get("Accept"), "")
+	})
+}

internal/net/http/middleware/oauth2.go

@@ -0,0 +1,129 @@
+package middleware
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"reflect"
+
+	E "github.com/yusing/go-proxy/internal/error"
+)
+
+type oAuth2 struct {
+	*oAuth2Opts
+	m *Middleware
+}
+
+type oAuth2Opts struct {
+	ClientID     string
+	ClientSecret string
+	AuthURL      string // Authorization Endpoint
+	TokenURL     string // Token Endpoint
+}
+
+var OAuth2 = &oAuth2{
+	m: &Middleware{withOptions: NewAuthentikOAuth2},
+}
+
+func NewAuthentikOAuth2(opts OptionsRaw) (*Middleware, E.NestedError) {
+	oauth := new(oAuth2)
+	oauth.m = &Middleware{
+		impl:   oauth,
+		before: oauth.handleOAuth2,
+	}
+	oauth.oAuth2Opts = &oAuth2Opts{}
+	err := Deserialize(opts, oauth.oAuth2Opts)
+	if err != nil {
+		return nil, err
+	}
+	b := E.NewBuilder("missing required fields")
+	optV := reflect.ValueOf(oauth.oAuth2Opts)
+	for _, field := range reflect.VisibleFields(reflect.TypeFor[oAuth2Opts]()) {
+		if optV.FieldByName(field.Name).Len() == 0 {
+			b.Add(E.Missing(field.Name))
+		}
+	}
+	if b.HasError() {
+		return nil, b.Build().Subject("oAuth2")
+	}
+	return oauth.m, nil
+}
+
+func (oauth *oAuth2) handleOAuth2(next http.HandlerFunc, rw ResponseWriter, r *Request) {
+	// Check if the user is authenticated (you may use session, cookie, etc.)
+	if !userIsAuthenticated(r) {
+		// TODO: Redirect to OAuth2 auth URL
+		http.Redirect(rw, r, fmt.Sprintf("%s?client_id=%s&redirect_uri=%s&response_type=code",
+			oauth.oAuth2Opts.AuthURL, oauth.oAuth2Opts.ClientID, ""), http.StatusFound)
+		return
+	}
+
+	// If you have a token in the query string, process it
+	if code := r.URL.Query().Get("code"); code != "" {
+		// Exchange the authorization code for a token here
+		// Use the TokenURL and authenticate the user
+		token, err := exchangeCodeForToken(code, oauth.oAuth2Opts, r.RequestURI)
+		if err != nil {
+			// handle error
+			http.Error(rw, "failed to get token", http.StatusUnauthorized)
+			return
+		}
+
+		// Save token and user info based on your requirements
+		saveToken(rw, token)
+
+		// Redirect to the originally requested URL
+		http.Redirect(rw, r, "/", http.StatusFound)
+		return
+	}
+
+	// If user is authenticated, go to the next handler
+	next(rw, r)
+}
+
+func userIsAuthenticated(r *http.Request) bool {
+	// Example: Check for a session or cookie
+	session, err := r.Cookie("session_token")
+	if err != nil || session.Value == "" {
+		return false
+	}
+	// Validate the session_token if necessary
+	return true
+}
+
+func exchangeCodeForToken(code string, opts *oAuth2Opts, requestURI string) (string, error) {
+	// Prepare the request body
+	data := url.Values{
+		"client_id":     {opts.ClientID},
+		"client_secret": {opts.ClientSecret},
+		"code":          {code},
+		"grant_type":    {"authorization_code"},
+		"redirect_uri":  {requestURI},
+	}
+	resp, err := http.PostForm(opts.TokenURL, data)
+	if err != nil {
+		return "", fmt.Errorf("failed to request token: %w", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("received non-ok status from token endpoint: %s", resp.Status)
+	}
+	// Decode the response
+	var tokenResp struct {
+		AccessToken string `json:"access_token"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil {
+		return "", fmt.Errorf("failed to decode token response: %w", err)
+	}
+	return tokenResp.AccessToken, nil
+}
+
+func saveToken(rw ResponseWriter, token string) {
+	// Example: Save token in cookie
+	http.SetCookie(rw, &http.Cookie{
+		Name:  "auth_token",
+		Value: token,
+		// set other properties as necessary, such as Secure and HttpOnly
+	})
+}

internal/net/http/middleware/real_ip.go

@@ -0,0 +1,115 @@
+package middleware
+
+import (
+	"net"
+
+	E "github.com/yusing/go-proxy/internal/error"
+	"github.com/yusing/go-proxy/internal/net/types"
+)
+
+// https://nginx.org/en/docs/http/ngx_http_realip_module.html
+
+type realIP struct {
+	*realIPOpts
+	m *Middleware
+}
+
+type realIPOpts struct {
+	// Header is the name of the header to use for the real client IP
+	Header string
+	// From is a list of Address / CIDRs to trust
+	From []*types.CIDR
+	/*
+		If recursive search is disabled,
+		the original client address that matches one of the trusted addresses is replaced by
+		the last address sent in the request header field defined by the Header field.
+		If recursive search is enabled,
+		the original client address that matches one of the trusted addresses is replaced by
+		the last non-trusted address sent in the request header field.
+	*/
+	Recursive bool
+}
+
+var RealIP = &realIP{
+	m: &Middleware{withOptions: NewRealIP},
+}
+
+var realIPOptsDefault = func() *realIPOpts {
+	return &realIPOpts{
+		Header: "X-Real-IP",
+		From:   []*types.CIDR{},
+	}
+}
+
+func NewRealIP(opts OptionsRaw) (*Middleware, E.NestedError) {
+	riWithOpts := new(realIP)
+	riWithOpts.m = &Middleware{
+		impl:   riWithOpts,
+		before: Rewrite(riWithOpts.setRealIP),
+	}
+	riWithOpts.realIPOpts = realIPOptsDefault()
+	err := Deserialize(opts, riWithOpts.realIPOpts)
+	if err != nil {
+		return nil, err
+	}
+	return riWithOpts.m, nil
+}
+
+func (ri *realIP) isInCIDRList(ip net.IP) bool {
+	for _, CIDR := range ri.From {
+		if CIDR.Contains(ip) {
+			return true
+		}
+	}
+	// not in any CIDR
+	return false
+}
+
+func (ri *realIP) setRealIP(req *Request) {
+	clientIPStr, _, err := net.SplitHostPort(req.RemoteAddr)
+	if err != nil {
+		clientIPStr = req.RemoteAddr
+	}
+	clientIP := net.ParseIP(clientIPStr)
+
+	var isTrusted = false
+	for _, CIDR := range ri.From {
+		if CIDR.Contains(clientIP) {
+			isTrusted = true
+			break
+		}
+	}
+	if !isTrusted {
+		ri.m.AddTracef("client ip %s is not trusted", clientIP).With("allowed CIDRs", ri.From)
+		return
+	}
+
+	var realIPs = req.Header.Values(ri.Header)
+	var lastNonTrustedIP string
+
+	if len(realIPs) == 0 {
+		ri.m.AddTracef("no real ip found in header %s", ri.Header).WithRequest(req)
+		return
+	}
+
+	if !ri.Recursive {
+		lastNonTrustedIP = realIPs[len(realIPs)-1]
+	} else {
+		for _, r := range realIPs {
+			if !ri.isInCIDRList(net.ParseIP(r)) {
+				lastNonTrustedIP = r
+			}
+		}
+	}
+
+	if lastNonTrustedIP == "" {
+		ri.m.AddTracef("no non-trusted ip found").With("allowed CIDRs", ri.From).With("ips", realIPs)
+		return
+	}
+
+	req.RemoteAddr = lastNonTrustedIP
+	req.Header.Set(ri.Header, lastNonTrustedIP)
+	req.Header.Set("X-Real-IP", lastNonTrustedIP)
+	req.Header.Set(xForwardedFor, lastNonTrustedIP)
+	ri.m.AddTracef("set real ip %s", lastNonTrustedIP)
+}