cleanup code

client.go

@@ -430,7 +430,14 @@ func (c *Client) Tracks() Tracks {
 func (c *Client) run() {
 	defer close(c.done)
 
-	c.closeError = func() error {
+	c.closeError = c.runInner()
+
+	c.ctxCancel()
+
+	c.doClose()
+}
+
+func (c *Client) runInner() error {
 	for {
 		select {
 		case req := <-c.options:
@@ -570,11 +577,6 @@ func (c *Client) run() {
 			return liberrors.ErrClientTerminated{}
 		}
 	}
-	}()
-
-	c.ctxCancel()
-
-	c.doClose()
 }
 
 func (c *Client) doClose() {
@@ -957,22 +959,18 @@ func (c *Client) do(req *base.Request, skipResponse bool, allowFrames bool) (*ba
 		c.OnRequest(req)
 	}
 
-	var res base.Response
-
-	err := func() error {
 	var buf bytes.Buffer
 	req.Write(&buf)
 
 	c.conn.SetWriteDeadline(time.Now().Add(c.WriteTimeout))
 	_, err := c.conn.Write(buf.Bytes())
 	if err != nil {
-			return err
+		return nil, err
 	}
 
-		if skipResponse {
-			return nil
-		}
+	var res base.Response
 
+	if !skipResponse {
 		c.conn.SetReadDeadline(time.Now().Add(c.ReadTimeout))
 
 		if allowFrames {
@@ -983,20 +981,14 @@ func (c *Client) do(req *base.Request, skipResponse bool, allowFrames bool) (*ba
 			buf := make([]byte, c.ReadBufferSize)
 			err = res.ReadIgnoreFrames(c.br, buf)
 			if err != nil {
-				return err
+				return nil, err
 			}
 		} else {
 			err = res.Read(c.br)
-			if err != nil {
-				return err
-			}
-		}
-
-		return nil
-	}()
 			if err != nil {
 				return nil, err
 			}
+		}
 
 		if c.OnResponse != nil {
 			c.OnResponse(&res)
@@ -1029,6 +1021,7 @@ func (c *Client) do(req *base.Request, skipResponse bool, allowFrames bool) (*ba
 
 			return c.do(req, skipResponse, allowFrames)
 		}
+	}
 
 	return &res, nil
 }

serverconn.go

@@ -115,25 +115,7 @@ func (sc *ServerConn) run() {
 	readDone := make(chan struct{})
 	go sc.runReader(readRequest, readErr, readDone)
 
-	err := func() error {
-		for {
-			select {
-			case req := <-readRequest:
-				req.res <- sc.handleRequestOuter(req.req)
-
-			case err := <-readErr:
-				return err
-
-			case ss := <-sc.sessionRemove:
-				if sc.session == ss {
-					sc.session = nil
-				}
-
-			case <-sc.ctx.Done():
-				return liberrors.ErrServerTerminated{}
-			}
-		}
-	}()
+	err := sc.runInner(readRequest, readErr)
 
 	sc.ctxCancel()
 
@@ -160,6 +142,26 @@ func (sc *ServerConn) run() {
 	}
 }
 
+func (sc *ServerConn) runInner(readRequest chan readReq, readErr chan error) error {
+	for {
+		select {
+		case req := <-readRequest:
+			req.res <- sc.handleRequestOuter(req.req)
+
+		case err := <-readErr:
+			return err
+
+		case ss := <-sc.sessionRemove:
+			if sc.session == ss {
+				sc.session = nil
+			}
+
+		case <-sc.ctx.Done():
+			return liberrors.ErrServerTerminated{}
+		}
+	}
+}
+
 var errSwitchReadFunc = errors.New("switch read function")
 
 func (sc *ServerConn) runReader(readRequest chan readReq, readErr chan error, readDone chan struct{}) {

serversession.go

@@ -267,7 +267,63 @@ func (ss *ServerSession) run() {
 		})
 	}
 
-	err := func() error {
+	err := ss.runInner()
+
+	ss.ctxCancel()
+
+	switch ss.state {
+	case ServerSessionStatePlay:
+		ss.setuppedStream.readerSetInactive(ss)
+
+		if *ss.setuppedTransport == TransportUDP {
+			ss.s.udpRTCPListener.removeClient(ss)
+		}
+
+	case ServerSessionStateRecord:
+		if *ss.setuppedTransport == TransportUDP {
+			ss.s.udpRTPListener.removeClient(ss)
+			ss.s.udpRTCPListener.removeClient(ss)
+		}
+	}
+
+	if ss.setuppedStream != nil {
+		ss.setuppedStream.readerRemove(ss)
+	}
+
+	if ss.writerRunning {
+		ss.writeBuffer.Close()
+		<-ss.writerDone
+		ss.writerRunning = false
+	}
+
+	for sc := range ss.conns {
+		if sc == ss.tcpConn {
+			sc.Close()
+
+			// make sure that OnFrame() is never called after OnSessionClose()
+			<-sc.done
+		}
+
+		select {
+		case sc.sessionRemove <- ss:
+		case <-sc.ctx.Done():
+		}
+	}
+
+	select {
+	case ss.s.sessionClose <- ss:
+	case <-ss.s.ctx.Done():
+	}
+
+	if h, ok := ss.s.Handler.(ServerHandlerOnSessionClose); ok {
+		h.OnSessionClose(&ServerHandlerOnSessionCloseCtx{
+			Session: ss,
+			Error:   err,
+		})
+	}
+}
+
+func (ss *ServerSession) runInner() error {
 	for {
 		select {
 		case req := <-ss.request:
@@ -369,60 +425,6 @@ func (ss *ServerSession) run() {
 			return liberrors.ErrServerTerminated{}
 		}
 	}
-	}()
-
-	ss.ctxCancel()
-
-	switch ss.state {
-	case ServerSessionStatePlay:
-		ss.setuppedStream.readerSetInactive(ss)
-
-		if *ss.setuppedTransport == TransportUDP {
-			ss.s.udpRTCPListener.removeClient(ss)
-		}
-
-	case ServerSessionStateRecord:
-		if *ss.setuppedTransport == TransportUDP {
-			ss.s.udpRTPListener.removeClient(ss)
-			ss.s.udpRTCPListener.removeClient(ss)
-		}
-	}
-
-	if ss.setuppedStream != nil {
-		ss.setuppedStream.readerRemove(ss)
-	}
-
-	if ss.writerRunning {
-		ss.writeBuffer.Close()
-		<-ss.writerDone
-		ss.writerRunning = false
-	}
-
-	for sc := range ss.conns {
-		if sc == ss.tcpConn {
-			sc.Close()
-
-			// make sure that OnFrame() is never called after OnSessionClose()
-			<-sc.done
-		}
-
-		select {
-		case sc.sessionRemove <- ss:
-		case <-sc.ctx.Done():
-		}
-	}
-
-	select {
-	case ss.s.sessionClose <- ss:
-	case <-ss.s.ctx.Done():
-	}
-
-	if h, ok := ss.s.Handler.(ServerHandlerOnSessionClose); ok {
-		h.OnSessionClose(&ServerHandlerOnSessionCloseCtx{
-			Session: ss,
-			Error:   err,
-		})
-	}
 }
 
 func (ss *ServerSession) handleRequest(sc *ServerConn, req *base.Request) (*base.Response, error) {