Socket.io can't connect to WebSockets (only)

You want to:

• report a bug
• request a feature

Current behaviour

I connect to a WebSocket using Socket.io and no connection will be established. The WebSocket server (PHP Ratchet) detects a connection but this will be closed soon and Socket.IO never says that the client is connected to the server.

Steps to reproduce (if the current behaviour is a bug)

var conn = io('wss://demos.kaazing.com/echo', { upgrade: false, transports: ['websocket'] });

Error: Error during WebSocket handshake: Unexpected response code: 403

This is working:

var conn = new WebSocket('wss://demos.kaazing.com/echo');

-> Tested in the console of https://socket.io/get-started/chat/ <-

Expected behaviour

That socket.io can handle the WebSocket 👍

Setup

• OS: Windows 10
• browser: Google Chrome 66.0.3359.181 (Official Build) (64-bit)
• socket.io version: 1.3.5 and 2.1

[patrickbussmann]

Hi @hongweipeng, Im using new WebSocket() direct instead of using Socket.IO client.

[hongweipeng]

@patrickbussmann Well，Im also going to use the same way as you, thx.