Add basic clash api

experimental/clashapi/connections.go

@@ -0,0 +1,97 @@
+package clashapi
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/sagernet/sing-box/experimental/clashapi/trafficontroll"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/render"
+	"github.com/gorilla/websocket"
+)
+
+func connectionRouter(trafficManager *trafficontroll.Manager) http.Handler {
+	r := chi.NewRouter()
+	r.Get("/", getConnections(trafficManager))
+	r.Delete("/", closeAllConnections(trafficManager))
+	r.Delete("/{id}", closeConnection(trafficManager))
+	return r
+}
+
+func getConnections(trafficManager *trafficontroll.Manager) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if !websocket.IsWebSocketUpgrade(r) {
+			snapshot := trafficManager.Snapshot()
+			render.JSON(w, r, snapshot)
+			return
+		}
+
+		conn, err := upgrader.Upgrade(w, r, nil)
+		if err != nil {
+			return
+		}
+
+		intervalStr := r.URL.Query().Get("interval")
+		interval := 1000
+		if intervalStr != "" {
+			t, err := strconv.Atoi(intervalStr)
+			if err != nil {
+				render.Status(r, http.StatusBadRequest)
+				render.JSON(w, r, ErrBadRequest)
+				return
+			}
+
+			interval = t
+		}
+
+		buf := &bytes.Buffer{}
+		sendSnapshot := func() error {
+			buf.Reset()
+			snapshot := trafficManager.Snapshot()
+			if err := json.NewEncoder(buf).Encode(snapshot); err != nil {
+				return err
+			}
+			return conn.WriteMessage(websocket.TextMessage, buf.Bytes())
+		}
+
+		if err = sendSnapshot(); err != nil {
+			return
+		}
+
+		tick := time.NewTicker(time.Millisecond * time.Duration(interval))
+		defer tick.Stop()
+		for range tick.C {
+			if err = sendSnapshot(); err != nil {
+				break
+			}
+		}
+	}
+}
+
+func closeConnection(trafficManager *trafficontroll.Manager) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		id := chi.URLParam(r, "id")
+		snapshot := trafficManager.Snapshot()
+		for _, c := range snapshot.Connections {
+			if id == c.ID() {
+				c.Close()
+				break
+			}
+		}
+		render.NoContent(w, r)
+	}
+}
+
+func closeAllConnections(trafficManager *trafficontroll.Manager) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		snapshot := trafficManager.Snapshot()
+		for _, c := range snapshot.Connections {
+			c.Close()
+		}
+		render.NoContent(w, r)
+	}
+}