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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,67 +1,80 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "fmt" | ||
| "log" | ||
| "net" | ||
| "net/http" | ||
|
|
||
| "github.com/lxzan/gws" | ||
| ) | ||
|
|
||
| func main() { | ||
| var app = gws.NewServer(new(Handler), nil) | ||
| var h = &Handler{conns: gws.NewConcurrentMap[string, *gws.Conn]()} | ||
|
|
||
| app.OnRequest = func(conn net.Conn, br *bufio.Reader, r *http.Request) { | ||
| socket, err := app.GetUpgrader().UpgradeFromConn(conn, br, r) | ||
| var upgrader = gws.NewUpgrader(h, &gws.ServerOption{ | ||
| PermessageDeflate: gws.PermessageDeflate{ | ||
| Enabled: true, | ||
| ServerContextTakeover: true, | ||
| ClientContextTakeover: true, | ||
| }, | ||
| }) | ||
|
|
||
| http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) { | ||
| socket, err := upgrader.Upgrade(writer, request) | ||
| if err != nil { | ||
| log.Print(err.Error()) | ||
| log.Println(err.Error()) | ||
| return | ||
| } | ||
| var channel = make(chan []byte, 8) | ||
| var closer = make(chan struct{}) | ||
| socket.Session().Store("channel", channel) | ||
| socket.Session().Store("closer", closer) | ||
| go socket.ReadLoop() | ||
| websocketKey := request.Header.Get("Sec-WebSocket-Key") | ||
| socket.Session().Store("websocketKey", websocketKey) | ||
| h.conns.Store(websocketKey, socket) | ||
| go func() { | ||
| for { | ||
| select { | ||
| case p := <-channel: | ||
| _ = socket.WriteMessage(gws.OpcodeText, p) | ||
| case <-closer: | ||
| return | ||
| } | ||
| } | ||
| socket.ReadLoop() | ||
| }() | ||
| }) | ||
|
|
||
| go func() { | ||
| if err := http.ListenAndServe(":8000", nil); err != nil { | ||
| return | ||
| } | ||
| }() | ||
|
|
||
| for { | ||
| var msg = "" | ||
| if _, err := fmt.Scanf("%s\n", &msg); err != nil { | ||
| log.Println(err.Error()) | ||
| return | ||
| } | ||
| h.Broadcast(msg) | ||
| } | ||
| } | ||
|
|
||
| log.Fatalf("%v", app.Run(":8000")) | ||
| func getSession[T any](s gws.SessionStorage, key string) (val T) { | ||
| if v, ok := s.Load(key); ok { | ||
| val, _ = v.(T) | ||
| } | ||
| return | ||
| } | ||
|
|
||
| type Handler struct { | ||
| gws.BuiltinEventHandler | ||
| conns *gws.ConcurrentMap[string, *gws.Conn] | ||
| } | ||
|
|
||
| func (c *Handler) getSession(socket *gws.Conn, key string) any { | ||
| v, _ := socket.Session().Load(key) | ||
| return v | ||
| } | ||
|
|
||
| func (c *Handler) Send(socket *gws.Conn, payload []byte) { | ||
| var channel = c.getSession(socket, "channel").(chan []byte) | ||
| select { | ||
| case channel <- payload: | ||
| default: | ||
| return | ||
| } | ||
| func (c *Handler) Broadcast(msg string) { | ||
| var b = gws.NewBroadcaster(gws.OpcodeText, []byte(msg)) | ||
| c.conns.Range(func(key string, conn *gws.Conn) bool { | ||
| _ = b.Broadcast(conn) | ||
| return true | ||
| }) | ||
| _ = b.Close() | ||
| } | ||
|
|
||
| func (c *Handler) OnClose(socket *gws.Conn, err error) { | ||
| var closer = c.getSession(socket, "closer").(chan struct{}) | ||
| closer <- struct{}{} | ||
| websocketKey := getSession[string](socket.Session(), "websocketKey") | ||
| c.conns.Delete(websocketKey) | ||
| } | ||
|
|
||
| func (c *Handler) OnMessage(socket *gws.Conn, message *gws.Message) { | ||
| defer message.Close() | ||
| _ = socket.WriteMessage(message.Opcode, message.Bytes()) | ||
| } |
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