48 lines
1.7 KiB
Python
48 lines
1.7 KiB
Python
from functools import wraps
|
|
|
|
from django.middleware.cache import CacheMiddleware
|
|
from django.utils.cache import add_never_cache_headers, patch_cache_control
|
|
from django.utils.decorators import decorator_from_middleware_with_args
|
|
|
|
|
|
def cache_page(timeout, *, cache=None, key_prefix=None):
|
|
"""
|
|
Decorator for views that tries getting the page from the cache and
|
|
populates the cache if the page isn't in the cache yet.
|
|
|
|
The cache is keyed by the URL and some data from the headers.
|
|
Additionally there is the key prefix that is used to distinguish different
|
|
cache areas in a multi-site setup. You could use the
|
|
get_current_site().domain, for example, as that is unique across a Django
|
|
project.
|
|
|
|
Additionally, all headers from the response's Vary header will be taken
|
|
into account on caching -- just like the middleware does.
|
|
"""
|
|
return decorator_from_middleware_with_args(CacheMiddleware)(
|
|
cache_timeout=timeout, cache_alias=cache, key_prefix=key_prefix
|
|
)
|
|
|
|
|
|
def cache_control(**kwargs):
|
|
def _cache_controller(viewfunc):
|
|
@wraps(viewfunc)
|
|
def _cache_controlled(request, *args, **kw):
|
|
response = viewfunc(request, *args, **kw)
|
|
patch_cache_control(response, **kwargs)
|
|
return response
|
|
return _cache_controlled
|
|
return _cache_controller
|
|
|
|
|
|
def never_cache(view_func):
|
|
"""
|
|
Decorator that adds headers to a response so that it will never be cached.
|
|
"""
|
|
@wraps(view_func)
|
|
def _wrapped_view_func(request, *args, **kwargs):
|
|
response = view_func(request, *args, **kwargs)
|
|
add_never_cache_headers(response)
|
|
return response
|
|
return _wrapped_view_func
|