server: Check websocket.Conn.WriteMessage error

server.go

@@ -35,7 +35,11 @@ func jpeg(w http.ResponseWriter, r *http.Request) {
 	tick := time.NewTicker(114 * time.Millisecond)
 	defer tick.Stop()
 	for range tick.C {
-		c.WriteMessage(websocket.BinaryMessage, data)
+		err = c.WriteMessage(websocket.BinaryMessage, data)
+		if err != nil {
+			log.Print("WriteMessage: ", err)
+			return
+		}
 	}
 }