[issue43619] convenience of using create_datagram_endpoint (and friends)
New submission from Roman Valov : Please check the attached source code. I have to implement an UDP server listening on all interfaces and able to detect what is the local address is used to communicate with remote address. In order to do this I'm using a temporary socket connected to exact remote endpoint to retrieve it's sock name. When I implement the solution in a pure `asyncio` fashion I faced pair of inconveniences: ISSUE-1: there is no idiomatic way to sleep forever inside async function. The example of using `create_datagram_endpoint` in documentation uses `sleep(3600)` which is not so useful. I've used `loop.create_future()` but it's perceived to be kind of hack. Also I can't use `loop.run_forever` in this context. Possible solutions: - `serve_forever` for a transport object - `asyncio.setup_and_run_forever(main())` -- function to setup file descriptors for an event loop and run forever. - `asyncio.sleep(None)` or `asyncio.pause()` -- special argument for sleep or dedicated `pause` function. ISSUE-2: callbacks for `Protocol` class are assumed to be sync `def`s. Despite the class is designed to be used as a part of `asyncio`. So, in order to invoke async code from sync callback I have to add some boilerplate code. Compare with `start_server`. It's `client_connected_cb` argument maybe a plain callable or co-routine function. So it's proposed to let Protocol callbacks to be `async def`s. -- components: asyncio files: async.py messages: 389488 nosy: Roman.Valov, asvetlov, yselivanov priority: normal severity: normal status: open title: convenience of using create_datagram_endpoint (and friends) type: enhancement versions: Python 3.8 Added file: https://bugs.python.org/file49912/async.py ___ Python tracker <https://bugs.python.org/issue43619> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18095] unable to invoke socket.connect with AF_UNSPEC
New submission from Roman Valov: There is a way to disconnect UDP socket that was previously connected to specific remote endpoint in C: struct sockaddr_in sin; memset((char *)sin, 0, sizeof(sin)); sin.sin_family = AF_UNSPEC; connect(fd, (struct sockaddr *)sin, sizeof(sin)); However in this is not available in python, since connect accepts only (host, port) as a parameter for UDP socket. It's possible to drop port connection with port=0, however I can't find a way to drop host connection. -- components: IO messages: 190308 nosy: Roman.Valov priority: normal severity: normal status: open title: unable to invoke socket.connect with AF_UNSPEC type: behavior versions: Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18095 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
