Make creating a new sender cleaner

telethon/network/connection.py

@@ -130,6 +130,13 @@ class Connection:
     def close(self):
         self.conn.close()
 
+    def clone(self):
+        """Creates a copy of this Connection"""
+        return Connection(self.ip, self.port,
+                          mode=self._mode,
+                          proxy=self.conn.proxy,
+                          timeout=self.conn.timeout)
+
     # region Receive message implementations
 
     def recv(self):

telethon/network/mtproto_sender.py

@@ -54,6 +54,10 @@ class MtProtoSender:
         self._need_confirmation.clear()
         self._clear_all_pending()
 
+    def clone(self):
+        """Creates a copy of this MtProtoSender as a new connection"""
+        return MtProtoSender(self.session, self.connection.clone())
+
     # region Send and receive
 
     def send(self, *requests):

telethon/telegram_bare_client.py

@@ -388,18 +388,11 @@ class TelegramBareClient:
             raise ValueError('You can only invoke requests, not types!')
 
         # Determine the sender to be used (main or a new connection)
-        # TODO Polish this so it's nicer
         on_main_thread = threading.get_ident() == self._main_thread_ident
         if on_main_thread or self._on_read_thread():
             sender = self._sender
         else:
-            conn = Connection(
-                self.session.server_address, self.session.port,
-                mode=self._sender.connection._mode,
-                proxy=self._sender.connection.conn.proxy,
-                timeout=self._sender.connection.get_timeout()
-            )
-            sender = MtProtoSender(self.session, conn)
+            sender = self._sender.clone()
             sender.connect()
 
         # We should call receive from this thread if there's no background