New submission from Cal Leeming <[email protected]>:
I came up against a problem today whilst trying to submit a request to a remote
API. The header needed to contain:
'Content-MD5' : "md5here"
But the urllib2 Request() forces capitalize() on all header names, and
transformed it into "Content-Md5", which in turn made the remote web server
ignore the header and break the request (as the remote side is case sensitive,
of which we don't have any control over).
I attempted to get smart by using the following patch:
class _str(str):
def capitalize(s):
print s
return s
_headers = {_str("Content-MD5") : 'md5here'}
But this failed to work:
---HEADERS---
{'Content-MD5': 'nts0yj7AdzJALyNOxafDyA=='}
---URLLIB2 DEBUG---
send: 'POST /api/v1 m HTTP/1.1\r\nContent-Md5:
nts0yj7AdzJALyNOxafDyA==\r\n\r\n\r\n'
Upon inspecting the urllib2.py source, I found 3 references to capitalize()
which seem to cause this problem, but it seems impossible to monkey patch, nor
fix without forking.
Therefore, I'd like to +1 a feature request to have an extra option at the time
of the request being opened, to bypass the capitalize() on header names (maybe,
header_keep_original = True or something).
And, if anyone could suggest a possible monkey patch (which doesn't involve
forking huge chunks of code), that'd be good too :)
Thanks
Cal
----------
components: Library (Lib)
messages: 139512
nosy: Cal.Leeming
priority: normal
severity: normal
status: open
title: urllib2 Request() forces capitalize() on header names, breaking some
requests
type: behavior
versions: Python 2.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue12455>
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