WebSocket connection to '...' failed: Invalid frame header

Question

I use express and socket.io

My node server is running on 127.0.0.1:3000 and i have connected it

var socket = io.connect('http://127.0.0.1:3000', {query: 'id=' + user.id});

There is a warning in my browser console.

WebSocket connection to 'ws://127.0.0.1:3000/socket.io/?id=ecad7e1a009eb4f943ead0b4db8d62c4&EIO=3&transport=websocket&sid=0RMaRoZb7U67td_2AAAD' failed: Invalid frame header

Also it runs well. There is no problem :). But i wondered.

Answer 1

Maybe you should check versions of socket client and server. They should be the same.