Rename more subpackages and modules

telethon/_network/mtprotoplainsender.py

@@ -0,0 +1,56 @@
+"""
+This module contains the class used to communicate with Telegram's servers
+in plain text, when no authorization key has been created yet.
+"""
+import struct
+
+from .mtprotostate import MTProtoState
+from ..errors import InvalidBufferError
+from ..extensions import BinaryReader
+
+
+class MTProtoPlainSender:
+    """
+    MTProto Mobile Protocol plain sender
+    (https://core.telegram.org/mtproto/description#unencrypted-messages)
+    """
+    def __init__(self, connection, *, loggers):
+        """
+        Initializes the MTProto plain sender.
+
+        :param connection: the Connection to be used.
+        """
+        self._state = MTProtoState(auth_key=None, loggers=loggers)
+        self._connection = connection
+
+    async def send(self, request):
+        """
+        Sends and receives the result for the given request.
+        """
+        body = bytes(request)
+        msg_id = self._state._get_new_msg_id()
+        await self._connection.send(
+            struct.pack('<qqi', 0, msg_id, len(body)) + body
+        )
+
+        body = await self._connection.recv()
+        if len(body) < 8:
+            raise InvalidBufferError(body)
+
+        with BinaryReader(body) as reader:
+            auth_key_id = reader.read_long()
+            assert auth_key_id == 0, 'Bad auth_key_id'
+
+            msg_id = reader.read_long()
+            assert msg_id != 0,  'Bad msg_id'
+            # ^ We should make sure that the read ``msg_id`` is greater
+            # than our own ``msg_id``. However, under some circumstances
+            # (bad system clock/working behind proxies) this seems to not
+            # be the case, which would cause endless assertion errors.
+
+            length = reader.read_int()
+            assert length > 0,  'Bad length'
+            # We could read length bytes and use those in a new reader to read
+            # the next TLObject without including the padding, but since the
+            # reader isn't used for anything else after this, it's unnecessary.
+            return reader.tgread_object()