New submission from Christian Heimes <li...@cheimes.de>: https://bugs.python.org/issue23302 changed how http.client sends request. endheaders() no longer sends header and message body in one TCP package if the total payload is smaller than TCP max segment size. https://github.com/python/cpython/blob/3.5/Lib/http/client.py#L934-L936 uses two send calls to send header and body. This causes very simple HTTP servers in embedded devices to fail.
Matthew Garrett noticed the bug, see https://twitter.com/mjg59/status/972985566387032064 / https://twitter.com/mjg59/status/973000950439817217 We should try to send requests as one TCP package again. TCP_CORK may do the trick. Or we should fix our custom implementation of send. It has multiple issues, e.g. a fixed buffer. The buffer size is suboptimal for small MTU and jumbo frames. ---------- components: Library (Lib) keywords: 3.5regression messages: 313743 nosy: benjamin.peterson, christian.heimes priority: normal severity: normal status: open title: http.client no longer sends HTTP request in one TCP package type: behavior versions: Python 3.6, Python 3.7, Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33067> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
