New submission from Demian Brecht:
#14721 solved setting the Content-Length header for 0-length bodies. However,
it doesn't account for cases where body is None (reported by James Rutherford
here: http://bugs.python.org/issue14721#msg236600).
One method of solving this might be something like this:
_METHODS_EXPECTING_BODIES = {'OPTIONS', 'POST', 'PUT', 'PATCH'}
if method.upper() in _METHODS_EXPECTING_BODIES and \
'content-length' not in header_names:
self._set_content_length(body)
(_set_content_length would have to be updated in order to allow for None)
This ensures that Content-Length will not be set for methods not expecting a
body.
RFC 7230, Section 3.3.2:
A user agent SHOULD NOT send a Content-Length header field when the
request message does not contain a payload body and the method
semantics do not anticipate such a body.
----------
components: Library (Lib)
messages: 236803
nosy: demian.brecht
priority: normal
severity: normal
stage: needs patch
status: open
title: Content-length not set for HTTP methods expecting body when body is None
type: behavior
versions: Python 3.5
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<http://bugs.python.org/issue23539>
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