websocket_server_process_handshake

Examines the method and request headers in msg and (assuming msg contains a valid handshake request), fills in the handshake response.

If expected_origin is non-null, then only requests containing a matching "Origin" header will be accepted. If protocols is non-null, then only requests containing a compatible "Sec-WebSocket-Protocols" header will be accepted. If supported_extensions is non-null, then only requests containing valid supported extensions in "Sec-WebSocket-Extensions" header will be accepted. The accepted extensions will be returned in accepted_extensions parameter if non-null.

This is a low-level function; if you use [method@Server.add_websocket_handler] to handle accepting WebSocket connections, it will call this for you.

Parameters:

msg	SoupServerMessage containing the client side of a WebSocket handshake
expected_origin	expected Origin header
protocols	allowed WebSocket protocols.
accepted_extensions	a List of [class@WebsocketExtension] objects
supported_extensions	list of supported extension types

Returns:

true if msg contained a valid WebSocket handshake request and was updated to contain a handshake response. false if not.