New submission from Daniel Morrison: The no_proxy environment variable works in python as a case sensitive suffix check.
Curl handles this variable as a case insensitive hostname check. Case sensitivity appears to be in conflict with the DNS Case Insensitivity RFC (https://tools.ietf.org/html/rfc4343). While the suffix check is documented (https://docs.python.org/3/library/urllib.request.html), this seems to be problematic and inconsistent with other tools on the system. I believe the ideal solution would be to have proxy_bypass be a method of ProxyHandler so that it can be overridden without dependence on undocumented methods. This would also allow for the requested behavior to be added without breaking backwards compatibility. ---------- components: Library (Lib) messages: 264297 nosy: Daniel Morrison priority: normal severity: normal status: open title: urllib.request no_proxy check differs from curl type: enhancement versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4, Python 3.5, Python 3.6 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26864> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
