fix: headers not included in request on web platform

[wkok]

Description

When specifying headers in the connect request, they are not included in the server request when the platform is web.

(It works on linux)

Steps To Reproduce

v0.1.1

import 'package:web_socket_client/web_socket_client.dart';

WebSocket connect(url) {
  return WebSocket(url, headers: {"test": "header"});
}

Expected Behavior

Headers to be included in the network request.

Screenshots

It works on linux:

but not on web (chrome):

[felangel]

Hi @wkok 👋 Thanks for opening an issue!

This is working as intended because afaik it's not possible to set headers as part of the WebSocket MDN Specification.

Also see https://stackoverflow.com/questions/4361173/http-headers-in-websockets-client-api.

Hope that helps 👍

[wkok]

Thanks for the links, I've opted for going the protocols route and sending the data in the Sec-WebSocket-Protocol headers as suggested here