Expose received Websocket Handshake Headers

[Nikola-Milovic]

Current implementation of WebsocketPeer.HandshakeHeaders says the following

string[] WebSocketPeer.HandshakeHeaders { get; set; }

The extra HTTP headers to be sent during the WebSocket handshake\.

Note: Not supported in Web exports due to browsers' restrictions\.

Meaning this is only supported to set the headers when establishing a connection, but since the you can also use this peer on the server side, it would be useful to receive the headers as well. For example if I am implementing a WS server in Godot I would like to have a way to get the auth headers that occured during the handshake.

[Az-qianchen]

If we can receive it, maybe we can use it as an authorization?

[Nikola-Milovic]

Yeah that lead me to this proposal. With Godot WS you cannot do handshake authorization since you have no access to the tokens :/