| 32 | } |
| 33 | |
| 34 | func (handler *WSHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { |
| 35 | if r.Method != "GET" { |
| 36 | http.Error(w, "Method not allowed", 405) |
| 37 | return |
| 38 | } |
| 39 | conn, err := handler.upgrader.Upgrade(w, r, nil) |
| 40 | if err != nil { |
| 41 | log.Debug("upgrade error: %v", err) |
| 42 | return |
| 43 | } |
| 44 | conn.SetReadLimit(int64(handler.maxMsgLen)) |
| 45 | |
| 46 | handler.wg.Add(1) |
| 47 | defer handler.wg.Done() |
| 48 | |
| 49 | handler.mutexConns.Lock() |
| 50 | if handler.conns == nil { |
| 51 | handler.mutexConns.Unlock() |
| 52 | conn.Close() |
| 53 | return |
| 54 | } |
| 55 | if len(handler.conns) >= handler.maxConnNum { |
| 56 | handler.mutexConns.Unlock() |
| 57 | conn.Close() |
| 58 | log.Debug("too many connections") |
| 59 | return |
| 60 | } |
| 61 | handler.conns[conn] = struct{}{} |
| 62 | handler.mutexConns.Unlock() |
| 63 | |
| 64 | wsConn := newWSConn(conn, handler.pendingWriteNum, handler.maxMsgLen) |
| 65 | agent := handler.newAgent(wsConn) |
| 66 | agent.Run() |
| 67 | |
| 68 | // cleanup |
| 69 | wsConn.Close() |
| 70 | handler.mutexConns.Lock() |
| 71 | delete(handler.conns, conn) |
| 72 | handler.mutexConns.Unlock() |
| 73 | agent.OnClose() |
| 74 | } |
| 75 | |
| 76 | func (server *WSServer) Start() { |
| 77 | ln, err := net.Listen("tcp", server.Addr) |