46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
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import logging
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import socket
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from functools import partial
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from typing import Callable, Optional
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from .._private.unmarshaller import Unmarshaller
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from ..message import Message
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def _message_reader(
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unmarshaller: Unmarshaller,
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process: Callable[[Message], None],
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finalize: Callable[[Optional[Exception]], None],
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negotiate_unix_fd: bool,
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) -> None:
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"""Reads messages from the unmarshaller and passes them to the process function."""
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try:
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while True:
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message = unmarshaller._unmarshall()
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if message is None:
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return
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try:
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process(message)
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except Exception:
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logging.error("Unexpected error processing message: %s", exc_info=True)
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# If we are not negotiating unix fds, we can stop reading as soon as we have
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# the buffer is empty as asyncio will call us again when there is more data.
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if (
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not negotiate_unix_fd
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and not unmarshaller._has_another_message_in_buffer()
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):
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return
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except Exception as e:
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finalize(e)
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def build_message_reader(
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sock: Optional[socket.socket],
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process: Callable[[Message], None],
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finalize: Callable[[Optional[Exception]], None],
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negotiate_unix_fd: bool,
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) -> Callable[[], None]:
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"""Build a callable that reads messages from the unmarshaller and passes them to the process function."""
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unmarshaller = Unmarshaller(None, sock, negotiate_unix_fd)
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return partial(_message_reader, unmarshaller, process, finalize, negotiate_unix_fd)
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