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Diffstat (limited to 'django/utils/cache.py')
| -rw-r--r-- | django/utils/cache.py | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/django/utils/cache.py b/django/utils/cache.py index 5654bed7aa..4fcf493944 100644 --- a/django/utils/cache.py +++ b/django/utils/cache.py @@ -74,6 +74,21 @@ def patch_cache_control(response, **kwargs): cc = ', '.join([dictvalue(el) for el in cc.items()]) response['Cache-Control'] = cc +def get_max_age(response): + """ + Returns the max-age from the response Cache-Control header as an integer + (or ``None`` if it wasn't found or wasn't an integer. + """ + if not response.has_header('Cache-Control'): + return + cc = dict([_to_tuple(el) for el in + cc_delim_re.split(response['Cache-Control'])]) + if 'max-age' in cc: + try: + return int(cc['max-age']) + except (ValueError, TypeError): + pass + def patch_response_headers(response, cache_timeout=None): """ Adds some useful headers to the given HttpResponse object: @@ -180,3 +195,10 @@ def learn_cache_key(request, response, cache_timeout=None, key_prefix=None): # for the request.path cache.set(cache_key, [], cache_timeout) return _generate_cache_key(request, [], key_prefix) + + +def _to_tuple(s): + t = s.split('=',1) + if len(t) == 2: + return t[0].lower(), t[1] + return t[0].lower(), True |