ws works

main.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"context"
+	"log"
+	"net/http"
+	"time"
+
+	"nhooyr.io/websocket"
+	"nhooyr.io/websocket/wsjson"
+)
+
+type Server struct {
+	OnOpen    func(conn *websocket.Conn)
+	OnClose   func(conn *websocket.Conn, err error)
+	OnMessage func(conn *websocket.Conn, msg map[string]any)
+}
+
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	conn, err := websocket.Accept(w, r, &websocket.AcceptOptions{
+		InsecureSkipVerify: true,
+	})
+	if err != nil {
+		log.Println("accept error:", err)
+		return
+	}
+	defer conn.CloseNow()
+
+	if s.OnOpen != nil {
+		s.OnOpen(conn)
+	}
+
+	ctx, cancel := context.WithTimeout(r.Context(), 30*time.Second)
+	defer cancel()
+
+	var readErr error
+	for {
+		var msg map[string]any
+		if readErr = wsjson.Read(ctx, conn, &msg); readErr != nil {
+			break
+		}
+		if s.OnMessage != nil {
+			s.OnMessage(conn, msg)
+		}
+	}
+
+	if s.OnClose != nil {
+		s.OnClose(conn, readErr)
+	}
+
+	conn.Close(websocket.StatusNormalClosure, "done")
+}
+
+func main() {
+	srv := &Server{
+		OnOpen: func(conn *websocket.Conn) {
+			log.Println("client connected")
+		},
+		OnClose: func(conn *websocket.Conn, err error) {
+			log.Println("client disconnected:", err)
+		},
+		OnMessage: func(conn *websocket.Conn, msg map[string]any) {
+			log.Printf("received: %v\n", msg)
+			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+			defer cancel()
+			if err := wsjson.Write(ctx, conn, map[string]any{"echo": msg}); err != nil {
+				log.Println("write error:", err)
+			}
+		},
+	}
+
+	http.Handle("/ws", srv)
+	log.Println("server listening on :8080")
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}