socket.io-client how to set request header when making connection

Question

I'm trying to set a http header when socket.io client makes the connection request. Is there a way to do this?

Here is what i'm doing:

// server side var io = socketio(server);  io.use(function (socket, next) {   // authorize using authorization header in socket.request.headers });  // client side var socket = io();  // i'm trying to set an authorization header in this http reqeust 

Any ideas? Thanks.

Answer 1

You can use extraHeaders option, if you are using socket.io-client >= 1.4.

For example:

var socket = io("http://localhost", {   extraHeaders: {     Authorization: "Bearer authorization_token_here"   } }); 

engine.io-client, which is a backend of socket.io-client, introduced extraHeaders support on 2015-11-28.

Answer 2

It seems like the client doesn't support setting headers, as not all transports allow for the setting of headers.

This post by facundoolano details a workaround to authentication that doesn't require placing the auth token in the query string.

His workaround module can be found at https://github.com/invisiblejs/socketio-auth.

Makes me wonder why on server-side, socket.io allows for the request headers to be accessed...