[MM-61776] Fix errcheck issues in server/channels/app/platform/web_conn.go (#29515)

server/.golangci.yml

@@ -101,7 +101,6 @@ issues:
         channels/app/platform/session.go|\
         channels/app/platform/status.go|\
         channels/app/platform/web_broadcast_hook.go|\
-        channels/app/platform/web_conn.go|\
         channels/app/platform/web_hub.go|\
         channels/app/platform/web_hub_test.go|\
         channels/app/plugin_test.go|\

server/channels/app/platform/web_conn.go

@@ -437,7 +437,11 @@ func (wc *WebConn) readPump() {
 	}
 
 	wc.WebSocket.SetReadLimit(model.SocketMaxMessageSizeKb)
-	wc.WebSocket.SetReadDeadline(time.Now().Add(pongWaitTime))
+	err := wc.WebSocket.SetReadDeadline(time.Now().Add(pongWaitTime))
+	if err != nil {
+		wc.logSocketErr("websocket.SetReadDeadline", err)
+		return
+	}
 	wc.WebSocket.SetPongHandler(func(string) error {
 		if err := wc.WebSocket.SetReadDeadline(time.Now().Add(pongWaitTime)); err != nil {
 			return err
@@ -551,7 +555,9 @@ func (wc *WebConn) writePump() {
 		select {
 		case msg, ok := <-wc.send:
 			if !ok {
-				wc.writeMessageBuf(websocket.CloseMessage, []byte{})
+				if err := wc.writeMessageBuf(websocket.CloseMessage, []byte{}); err != nil {
+					wc.logSocketErr("websocket.send", err)
+				}
 				return
 			}
 
@@ -620,7 +626,9 @@ func (wc *WebConn) writePump() {
 // writeMessageBuf is a helper utility that wraps the write to the socket
 // along with setting the write deadline.
 func (wc *WebConn) writeMessageBuf(msgType int, data []byte) error {
-	wc.WebSocket.SetWriteDeadline(time.Now().Add(writeWaitTime))
+	if err := wc.WebSocket.SetWriteDeadline(time.Now().Add(writeWaitTime)); err != nil {
+		return err
+	}
 	return wc.WebSocket.WriteMessage(msgType, data)
 }