api: implement several docker apis

internal/api/v1/dockerapi/info.go

@@ -0,0 +1,57 @@
+package dockerapi
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+
+	dockerSystem "github.com/docker/docker/api/types/system"
+	"github.com/yusing/go-proxy/internal/gperr"
+	"github.com/yusing/go-proxy/internal/utils/strutils"
+)
+
+type DockerInfo dockerSystem.Info
+
+func (d *DockerInfo) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]any{
+		"host": d.Name,
+		"containers": map[string]int{
+			"total":   d.Containers,
+			"running": d.ContainersRunning,
+			"paused":  d.ContainersPaused,
+			"stopped": d.ContainersStopped,
+		},
+		"images":  d.Images,
+		"n_cpu":   d.NCPU,
+		"memory":  strutils.FormatByteSizeWithUnit(d.MemTotal),
+		"version": d.ServerVersion,
+	})
+}
+
+func Info(w http.ResponseWriter, r *http.Request) {
+	ctx, cancel := context.WithTimeout(r.Context(), reqTimeout)
+	defer cancel()
+
+	dockerClients, ok := getDockerClientsWithErrHandling(w)
+	if !ok {
+		return
+	}
+	defer closeAllClients(dockerClients)
+
+	errs := gperr.NewBuilder("failed to get docker info")
+
+	dockerInfos := make([]DockerInfo, len(dockerClients))
+	i := 0
+	for name, dockerClient := range dockerClients {
+		info, err := dockerClient.Info(ctx)
+		if err != nil {
+			errs.Add(err)
+			continue
+		}
+		info.Name = name
+		dockerInfos[i] = DockerInfo(info)
+		i++
+	}
+
+	handleResult(w, errs.Error(), dockerInfos)
+}