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Corrected a typo and made some style fixes. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@6626 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Gary Wilson Jr 2007-10-28 22:32:25 +00:00
parent 26ea06b0ab
commit d453eda388
1 changed files with 14 additions and 10 deletions
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20
django/utils/cache.py
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@ -13,7 +13,7 @@ into account when building its cache key. Requests with the same path but
different header content for headers named in "Vary" need to get different different header content for headers named in "Vary" need to get different
cache keys to prevent delivery of wrong content. cache keys to prevent delivery of wrong content.
A example: i18n middleware would need to distinguish caches by the An example: i18n middleware would need to distinguish caches by the
"Accept-language" header. "Accept-language" header.
""" """
@ -21,6 +21,7 @@ import md5
import re import re
import time import time
from email.Utils import formatdate from email.Utils import formatdate
from django.conf import settings from django.conf import settings
from django.core.cache import cache from django.core.cache import cache
from django.utils.encoding import smart_str, iri_to_uri from django.utils.encoding import smart_str, iri_to_uri
@ -95,8 +96,7 @@ def patch_response_headers(response, cache_timeout=None):
def add_never_cache_headers(response): def add_never_cache_headers(response):
""" """
Add headers to a response to indicate that Adds headers to a response to indicate that a page should never be cached.
a page should never be cached.
""" """
patch_response_headers(response, cache_timeout=-1) patch_response_headers(response, cache_timeout=-1)
@ -119,13 +119,14 @@ def patch_vary_headers(response, newheaders):
response['Vary'] = ', '.join(vary) response['Vary'] = ', '.join(vary)
def _generate_cache_key(request, headerlist, key_prefix): def _generate_cache_key(request, headerlist, key_prefix):
"Returns a cache key from the headers given in the header list." """Returns a cache key from the headers given in the header list."""
ctx = md5.new() ctx = md5.new()
for header in headerlist: for header in headerlist:
value = request.META.get(header, None) value = request.META.get(header, None)
if value is not None: if value is not None:
ctx.update(value) ctx.update(value)
return 'views.decorators.cache.cache_page.%s.%s.%s' % (key_prefix, iri_to_uri(request.path), ctx.hexdigest()) return 'views.decorators.cache.cache_page.%s.%s.%s' % (
key_prefix, iri_to_uri(request.path), ctx.hexdigest())
def get_cache_key(request, key_prefix=None): def get_cache_key(request, key_prefix=None):
""" """
@ -139,7 +140,8 @@ def get_cache_key(request, key_prefix=None):
""" """
if key_prefix is None: if key_prefix is None:
key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
cache_key = 'views.decorators.cache.cache_header.%s.%s' % (key_prefix, iri_to_uri(request.path)) cache_key = 'views.decorators.cache.cache_header.%s.%s' % (
key_prefix, iri_to_uri(request.path))
headerlist = cache.get(cache_key, None) headerlist = cache.get(cache_key, None)
if headerlist is not None: if headerlist is not None:
return _generate_cache_key(request, headerlist, key_prefix) return _generate_cache_key(request, headerlist, key_prefix)
@ -163,9 +165,11 @@ def learn_cache_key(request, response, cache_timeout=None, key_prefix=None):
key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
if cache_timeout is None: if cache_timeout is None:
cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS
cache_key = 'views.decorators.cache.cache_header.%s.%s' % (key_prefix, iri_to_uri(request.path)) cache_key = 'views.decorators.cache.cache_header.%s.%s' % (
key_prefix, iri_to_uri(request.path))
if response.has_header('Vary'): if response.has_header('Vary'):
headerlist = ['HTTP_'+header.upper().replace('-', '_') for header in vary_delim_re.split(response['Vary'])] headerlist = ['HTTP_'+header.upper().replace('-', '_')
for header in vary_delim_re.split(response['Vary'])]
cache.set(cache_key, headerlist, cache_timeout) cache.set(cache_key, headerlist, cache_timeout)
return _generate_cache_key(request, headerlist, key_prefix) return _generate_cache_key(request, headerlist, key_prefix)
else: else: