api: implement several docker apis

internal/api/v1/dockerapi/containers.go

@@ -0,0 +1,79 @@
+package dockerapi
+
+import (
+	"context"
+	"net/http"
+	"sort"
+	"time"
+
+	"github.com/coder/websocket"
+	"github.com/coder/websocket/wsjson"
+	"github.com/docker/docker/api/types/container"
+	"github.com/yusing/go-proxy/internal/gperr"
+	"github.com/yusing/go-proxy/internal/net/gphttp/gpwebsocket"
+	"github.com/yusing/go-proxy/internal/net/gphttp/httpheaders"
+)
+
+type Container struct {
+	Server string `json:"server"`
+	Name   string `json:"name"`
+	ID     string `json:"id"`
+	Image  string `json:"image"`
+	State  string `json:"state"`
+}
+
+func Containers(w http.ResponseWriter, r *http.Request) {
+	if httpheaders.IsWebsocket(r.Header) {
+		gpwebsocket.Periodic(w, r, 5*time.Second, func(conn *websocket.Conn) error {
+			containers, err := listContainers(r.Context())
+			if err != nil {
+				return err
+			}
+			return wsjson.Write(r.Context(), conn, containers)
+		})
+	} else {
+		containers, err := listContainers(r.Context())
+		handleResult(w, err, containers)
+	}
+}
+
+func listContainers(ctx context.Context) ([]Container, error) {
+	ctx, cancel := context.WithTimeout(ctx, reqTimeout)
+	defer cancel()
+
+	dockerClients, err := getDockerClients()
+	if err != nil {
+		return nil, err
+	}
+	defer closeAllClients(dockerClients)
+
+	errs := gperr.NewBuilder("failed to get containers")
+	containers := make([]Container, 0)
+	for server, dockerClient := range dockerClients {
+		conts, err := dockerClient.ContainerList(ctx, container.ListOptions{All: true})
+		if err != nil {
+			errs.Add(err)
+			continue
+		}
+		for _, cont := range conts {
+			containers = append(containers, Container{
+				Server: server,
+				Name:   cont.Names[0],
+				ID:     cont.ID,
+				Image:  cont.Image,
+				State:  cont.State,
+			})
+		}
+	}
+	sort.Slice(containers, func(i, j int) bool {
+		return containers[i].Name < containers[j].Name
+	})
+	if err := errs.Error(); err != nil {
+		gperr.LogError("failed to get containers", err)
+		if len(containers) == 0 {
+			return nil, err
+		}
+		return containers, nil
+	}
+	return containers, nil
+}