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Apply SO_REUSEADDR to test server's socket #4393

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merged 4 commits into from
Nov 27, 2019
Merged

Apply SO_REUSEADDR to test server's socket #4393

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6d0fedd
Apply SO_REUSEADDR to test server's socket
asvetlov Nov 27, 2019
e29da1e
Add changelog
asvetlov Nov 27, 2019
1c0e98b
Update aiohttp/test_utils.py
asvetlov Nov 27, 2019
c1bf57b
Unify configs (#4394)
asvetlov Nov 27, 2019
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1 change: 1 addition & 0 deletions CHANGES/4393.feature
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@@ -0,0 +1 @@
Apply SO_REUSEADDR to test server's socket.
6 changes: 6 additions & 0 deletions aiohttp/test_utils.py
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Expand Up @@ -5,6 +5,7 @@
import functools
import gc
import inspect
import os
import socket
import sys
import unittest
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SSLContext = None


REUSE_ADDRESS = os.name == 'posix' and sys.platform != 'cygwin'


def get_unused_port_socket(host: str) -> socket.socket:
return get_port_socket(host, 0)


def get_port_socket(host: str, port: int) -> socket.socket:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
if REUSE_ADDRESS:
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It will be nice if you add a comment describing why it is set here.

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+1

not everyone knows that it has different semantics under Windows.

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Well, I mean another thing ;). I don't understand why it ever needs. Even in Linux.

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Because if you retry binding to the same socket fast enough, it'll fail. Even from the same process (after unbinding). There's some sort of timeout in place.

OTOH if you were to always use an ephemeral port 0, the kernel would allocate you a different port each time and there wouldn't be such a problem.

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Sorry, I confused. I misread as SO_REUSEPORT.

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s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((host, port))
return s

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