Add headers to websocket handler object

Author: adityamohta

Diff for: websocket_server/websocket_server.py

@@ -446,6 +446,7 @@ def handshake(self):
         with self._send_lock:
             self.handshake_done = self.request.send(response.encode())
         self.valid_client = True
+        self.headers = headers
         self.server._new_client_(self)
 
     @classmethod