Opened 17 years ago
Closed 9 years ago
#6727 closed Cleanup/optimization (fixed)
django.utils.cache.patch_cache_control enhancement when response has empty cache control header
Reported by: | Owned by: | Dwight Gunning | |
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Component: | HTTP handling | Version: | dev |
Severity: | Normal | Keywords: | |
Cc: | doug@… | Triage Stage: | Ready for checkin |
Has patch: | yes | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description (last modified by )
See source:/django/trunk/django/utils/cache.py :
60: if response.has_header('Cache-Control'): 61: cc = cc_delim_re.split(response['Cache-Control']) 62: cc = dict([dictitem(el) for el in cc])
If a Cache-Control header exists but is empty, this will add a useless comma in the result.
See:
>>> cache_control_header='' >>> import re >>> cc_delim_re = re.compile(r'\s*,\s*') >>> cc = cc_delim_re.split(cache_control_header) >>> def dictitem(s): ... t = s.split('=',1) ... if len(t) > 1: ... return (t[0].lower(), t[1]) ... else: ... return (t[0].lower(), True) ... >>> cc = dict([dictitem(el) for el in cc]) >>> cc {'': True} >>> def dictvalue(t): ... if t[1] is True: ... return t[0] ... else: ... return t[0] + '=' + smart_str(t[1]) ... >>> from django.utils.encoding import smart_str >>> cc['max-age']='300' >>> cc = ', '.join([dictvalue(el) for el in cc.items()]) >>> cc ', max-age=300'
Note that this is still a valid cache control header according to:
- http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9
- http://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.1
But It would be nicer to test if existing cache control response header is empty, so something like:
60: if response.has_header('Cache-Control') and response['Cache-Control']:
Change History (11)
comment:1 by , 17 years ago
Cc: | removed |
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comment:2 by , 17 years ago
Triage Stage: | Unreviewed → Accepted |
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comment:3 by , 17 years ago
Description: | modified (diff) |
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comment:4 by , 14 years ago
Severity: | → Normal |
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Type: | → Cleanup/optimization |
comment:5 by , 13 years ago
UI/UX: | unset |
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comment:7 by , 9 years ago
Owner: | changed from | to
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Status: | new → assigned |
comment:8 by , 9 years ago
Created Github branch: https://github.com/dwightgunning/django/tree/ticket_6727
comment:9 by , 9 years ago
Additional test created. Test suite passes.
Raised pull request: https://github.com/django/django/pull/5597
Change UI/UX from NULL to False.