def _generate_cache_key(request, method, headerlist, key_prefix):
"""Returns a cache key from the headers given in the header list."""
ctx = md5_constructor()
for header in headerlist:
value = request.META.get(header, None)
if value is not None:
ctx.update(value)
path = md5_constructor(iri_to_uri(request.get_full_path()))
cache_key = 'views.decorators.cache.cache_page.%s.%s.%s.%s' % (
key_prefix, request.method, path.hexdigest(), ctx.hexdigest())
return _i18n_cache_key_suffix(request, cache_key)
def _generate_cache_key(request, method, headerlist, key_prefix):
"""Returns a cache key from the headers given in the header list."""
ctx = md5_constructor()
for header in headerlist:
value = request.META.get(header, None)
if value is not None:
ctx.update(value)
path = md5_constructor(iri_to_uri(request.get_full_path()))
cache_key = "views.decorators.cache.cache_page.%s.%s.%s.%s" % (
key_prefix,
request.method,
path.hexdigest(),
ctx.hexdigest(),
)
return _i18n_cache_key_suffix(request, cache_key)
def patch_response_headers(response, cache_timeout=None):
"""
Adds some useful headers to the given HttpResponse object:
ETag, Last-Modified, Expires and Cache-Control
Each header is only added if it isn't already set.
cache_timeout is in seconds. The CACHE_MIDDLEWARE_SECONDS setting is used
by default.
"""
if cache_timeout is None:
cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS
if cache_timeout < 0:
cache_timeout = 0 # Can't have max-age negative
if settings.USE_ETAGS and not response.has_header("ETag"):
response["ETag"] = '"%s"' % md5_constructor(response.content).hexdigest()
if not response.has_header("Last-Modified"):
response["Last-Modified"] = http_date()
if not response.has_header("Expires"):
response["Expires"] = http_date(time.time() + cache_timeout)
patch_cache_control(response, max_age=cache_timeout)
def patch_response_headers(response, cache_timeout=None):
"""
Adds some useful headers to the given HttpResponse object:
ETag, Last-Modified, Expires and Cache-Control
Each header is only added if it isn't already set.
cache_timeout is in seconds. The CACHE_MIDDLEWARE_SECONDS setting is used
by default.
"""
if cache_timeout is None:
cache_timeout = settings.CACHE_MIDDLEWARE_SECONDS
if cache_timeout < 0:
cache_timeout = 0 # Can't have max-age negative
if settings.USE_ETAGS and not response.has_header('ETag'):
response['ETag'] = '"%s"' % md5_constructor(
response.content).hexdigest()
if not response.has_header('Last-Modified'):
response['Last-Modified'] = http_date()
if not response.has_header('Expires'):
response['Expires'] = http_date(time.time() + cache_timeout)
patch_cache_control(response, max_age=cache_timeout)
def _generate_cache_header_key(key_prefix, request):
"""Returns a cache key for the header cache."""
path = md5_constructor(iri_to_uri(request.get_full_path()))
cache_key = "views.decorators.cache.cache_header.%s.%s" % (key_prefix, path.hexdigest())
return _i18n_cache_key_suffix(request, cache_key)
def _generate_cache_header_key(key_prefix, request):
"""Returns a cache key for the header cache."""
path = md5_constructor(iri_to_uri(request.get_full_path()))
cache_key = 'views.decorators.cache.cache_header.%s.%s' % (
key_prefix, path.hexdigest())
return _i18n_cache_key_suffix(request, cache_key)
