48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
"""
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Decorator for views that tries getting the page from the cache and
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populates the cache if the page isn't in the cache yet.
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The cache is keyed by the URL and some data from the headers. Additionally
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there is the key prefix that is used to distinguish different cache areas
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in a multi-site setup. You could use the sites.get_current().domain, for
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example, as that is unique across a Django project.
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Additionally, all headers from the response's Vary header will be taken into
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account on caching -- just like the middleware does.
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"""
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try:
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from functools import wraps
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except ImportError:
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from django.utils.functional import wraps # Python 2.3, 2.4 fallback.
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from django.utils.decorators import decorator_from_middleware
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from django.utils.cache import patch_cache_control, add_never_cache_headers
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from django.middleware.cache import CacheMiddleware
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cache_page = decorator_from_middleware(CacheMiddleware)
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def cache_control(**kwargs):
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def _cache_controller(viewfunc):
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def _cache_controlled(request, *args, **kw):
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response = viewfunc(request, *args, **kw)
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patch_cache_control(response, **kwargs)
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return response
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return wraps(viewfunc)(_cache_controlled)
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return _cache_controller
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def never_cache(view_func):
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"""
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Decorator that adds headers to a response so that it will
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never be cached.
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"""
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def _wrapped_view_func(request, *args, **kwargs):
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response = view_func(request, *args, **kwargs)
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add_never_cache_headers(response)
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return response
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return wraps(view_func)(_wrapped_view_func)
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