def render(self, context):
try:
expire_time = self.expire_time_var.resolve(context)
except VariableDoesNotExist:
raise TemplateSyntaxError('"cache" tag got an unknown variable: %r' % self.expire_time_var.var)
try:
expire_time = int(expire_time)
except (ValueError, TypeError):
raise TemplateSyntaxError('"cache" tag got a non-integer timeout value: %r' % expire_time)
# Build a unicode key for this fragment and all vary-on's.
args = md5_constructor(':'.join([urlquote(resolve_variable(var, context)) for var in self.vary_on]))
cache_key = 'template.cache.%s.%s' % (self.fragment_name, args.hexdigest())
value = cache.get(cache_key)
if value is None:
value = self.nodelist.render(context)
cache.set(cache_key, value, expire_time)
return value
def render(self, context):
try:
expire_time = self.expire_time_var.resolve(context)
except VariableDoesNotExist:
raise TemplateSyntaxError('"cache" tag got an unknown variable: %r' % self.expire_time_var.var)
try:
expire_time = int(expire_time)
except (ValueError, TypeError):
raise TemplateSyntaxError('"cache" tag got a non-integer timeout value: %r' % expire_time)
# Build a unicode key for this fragment and all vary-on's.
args = md5_constructor(u':'.join([urlquote(resolve_variable(var, context)) for var in self.vary_on]))
cache_key = 'template.cache.%s.%s' % (self.fragment_name, args.hexdigest())
value = cache.get(cache_key)
if value is None:
value = self.nodelist.render(context)
cache.set(cache_key, value, expire_time)
return value
def get_cache_key(request, key_prefix=None):
"""
Returns a cache key based on the request path. It can be used in the
request phase because it pulls the list of headers to take into account
from the global path registry and uses those to build a cache key to check
against.
If there is no headerlist stored, the page needs to be rebuilt, so this
function returns None.
"""
if key_prefix is None:
key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
cache_key = _generate_cache_header_key(key_prefix, request)
headerlist = cache.get(cache_key, None)
if headerlist is not None:
return _generate_cache_key(request, headerlist, key_prefix)
else:
return None
def get_cache_key(request, key_prefix=None):
"""
Returns a cache key based on the request path. It can be used in the
request phase because it pulls the list of headers to take into account
from the global path registry and uses those to build a cache key to check
against.
If there is no headerlist stored, the page needs to be rebuilt, so this
function returns None.
"""
if key_prefix is None:
key_prefix = settings.CACHE_MIDDLEWARE_KEY_PREFIX
cache_key = _generate_cache_header_key(key_prefix, request)
headerlist = cache.get(cache_key, None)
if headerlist is not None:
return _generate_cache_key(request, headerlist, key_prefix)
else:
return None
