def _wrapped_view_func(request, *args, **kwargs):
if cr_settings['CACHE_PAGES']:
# check if request is cacheable
request.is_preview = getattr(request, 'is_preview', False)
is_cacheable = request.method in (
'GET', 'HEAD'
) and not request.is_preview and not request.user.is_authenticated
for fn in hooks.get_hooks('is_request_cacheable'):
result = fn(request)
if isinstance(result, bool):
is_cacheable = result
if is_cacheable:
cache = caches[cr_settings['CACHE_BACKEND']]
djcache = CacheMiddleware(
cache_alias=cr_settings['CACHE_BACKEND'],
cache_timeout=cache.
default_timeout, # override CacheMiddleware's default timeout
key_prefix=None)
response = djcache.process_request(request)
if response:
response['X-Crcms-Cache'] = 'hit'
return response
# since we don't have a response at this point, run the view.
response = view_func(request, *args, **kwargs)
response['X-Crcms-Cache'] = 'miss'
djcache.process_response(request, response)
return response
# as a fall-back, just run the view function.
return view_func(request, *args, **kwargs)
def thumbnail(request, board_id, marked=False, voted=False):
bingo_board = get_object_or_404(BingoBoard,
board_id=board_id,
game__site=get_current_site(request))
square = bool(request.GET.get("square"))
large = bool(request.GET.get("large"))
# check if the board is from an expired game
game_expired_cachename = "game_expired__board={0:d}".format(
int(bingo_board.id))
game_expired = cache.get(game_expired_cachename)
if game_expired is None:
game_expired = bingo_board.game.is_expired()
cache.set(game_expired_cachename, game_expired, 60 * 60)
# when the game of the board is expired,
# the thumbnail can be cached longer.
if game_expired:
m = CacheMiddleware(cache_timeout=OLD_THUMBNAIL_CACHE_EXPIRY,
key_prefix="site_id={0:d}".format(
get_current_site(request).id))
else:
m = CacheMiddleware(cache_timeout=THUMBNAIL_CACHE_EXPIRY,
key_prefix="site_id={0:d}".format(
get_current_site(request).id))
response = m.process_request(request)
if response: # cached
return response
response = HttpResponse(content_type="image/png")
filename = _get_image_name(board_id, marked, voted) + \
"_" + _("thumbnail") + ".png"
response['Content-Disposition'] = 'filename={0}'.format(filename)
# TODO: replace hardcoded values with configurable ones
kwargs = {}
if large:
kwargs = {'thumbnail_width': 500, 'thumbnail_height': 500}
im = image_module.get_thumbnail(request.get_host(),
bingo_board,
marked,
voted,
square=square,
**kwargs)
im.save(response, "png")
return m.process_response(request, response)
def process_request(req, prefix, cache_time=60 * 60):
# retrieve the cache using the django's CacheMiddleware
cache_middleware = CacheMiddleware(cache_timeout=cache_time,
key_prefix=prefix)
response = cache_middleware.process_request(req)
# if no cache is found, return false
if not response:
return False
return response
def process_response(req, res, prefix, cache_time=60 * 60):
# update the cache using the django's CacheMiddleware
cache_middleware = CacheMiddleware(cache_timeout=cache_time,
key_prefix=prefix)
response = cache_middleware.process_response(req, res)
# update some header to prevent wrong client caching
max_age = get_max_age(response)
if max_age and max_age < max_age:
# Remove headers so patch_response works
for header in ('ETag', 'Last-Modified', 'Expires'):
if response.has_header(header):
del response[header]
patch_response_headers(response, max_age)
return response
def _wrapped_view_func(request, *args, **kwargs):
if wagtailcache_settings['WAGTAIL_CACHE']:
# check if request is cacheable
request.is_preview = getattr(request, 'is_preview', False)
is_cacheable = request.method in ('GET', 'HEAD') and \
not request.is_preview and \
not request.user.is_authenticated
for fn in hooks.get_hooks('is_request_cacheable'):
result = fn(request)
if isinstance(result, bool):
is_cacheable = result
if is_cacheable:
cache = caches[wagtailcache_settings['WAGTAIL_CACHE_BACKEND']]
# Create a CacheMiddleware using our specified values
djcache = CacheMiddleware(
cache_alias=wagtailcache_settings['WAGTAIL_CACHE_BACKEND'],
cache_timeout=cache.default_timeout,
key_prefix=None)
response = djcache.process_request(request)
if response:
# add a response header to indicate this was a cache hit
if wagtailcache_settings['WAGTAIL_CACHE_HEADER']:
response[wagtailcache_settings[
'WAGTAIL_CACHE_HEADER']] = 'hit'
return response
# since we don't have a response at this point, run the view.
response = view_func(request, *args, **kwargs)
# add a response header to indicate this was a cache miss
if wagtailcache_settings['WAGTAIL_CACHE_HEADER']:
response[
wagtailcache_settings['WAGTAIL_CACHE_HEADER']] = 'miss'
djcache.process_response(request, response)
return response
# as a fall-back, just run the view function.
return view_func(request, *args, **kwargs)
def set_cache_middleware(self, cache_time, prefix):
name = router.router.get_cache_name(prefix=prefix)
self.cache_middleware = CacheMiddleware(cache_timeout=cache_time,
key_prefix=prefix,
cache_alias=name)
def set_cache_middleware(self, cache_time, prefix):
self.cache_middleware = CacheMiddleware(cache_timeout=cache_time,
key_prefix=prefix)
