def process_response(self, request, response):
"""
Calculate the ETag, if needed.
When the status code of the response is 404, it may redirect to a path
with an appended slash if should_redirect_with_slash() returns True.
"""
# If the given URL is "Not Found", then check if we should redirect to
# a path with a slash appended.
if response.status_code == 404:
if self.should_redirect_with_slash(request):
return self.response_redirect_class(self.get_full_path_with_slash(request))
if settings.USE_ETAGS:
if not response.has_header('ETag'):
set_response_etag(response)
if response.has_header('ETag'):
return get_conditional_response(
request,
etag=unquote_etag(response['ETag']),
response=response,
)
return response
python类USE_ETAGS的实例源码
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'):
if hasattr(response, 'render') and callable(response.render):
response.add_post_render_callback(set_response_etag)
else:
response = set_response_etag(response)
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 process_response(self, request, response):
"""
Calculate the ETag, if needed.
"""
if settings.USE_ETAGS:
if response.has_header('ETag'):
etag = response['ETag']
elif response.streaming:
etag = None
else:
etag = '"%s"' % hashlib.md5(response.content).hexdigest()
if etag is not None:
if (200 <= response.status_code < 300
and request.META.get('HTTP_IF_NONE_MATCH') == etag):
cookies = response.cookies
response = http.HttpResponseNotModified()
response.cookies = cookies
else:
response['ETag'] = etag
return response
def process_response(self, request, response):
"""
Calculate the ETag, if needed.
"""
if settings.USE_ETAGS:
if response.has_header('ETag'):
etag = response['ETag']
elif response.streaming:
etag = None
else:
etag = '"%s"' % hashlib.md5(response.content).hexdigest()
if etag is not None:
if (200 <= response.status_code < 300
and request.META.get('HTTP_IF_NONE_MATCH') == etag):
cookies = response.cookies
response = http.HttpResponseNotModified()
response.cookies = cookies
else:
response['ETag'] = etag
return response
def process_response(self, request, response):
"""
Calculate the ETag, if needed.
"""
if settings.USE_ETAGS:
if response.has_header('ETag'):
etag = response['ETag']
elif response.streaming:
etag = None
else:
etag = '"%s"' % hashlib.md5(response.content).hexdigest()
if etag is not None:
if (200 <= response.status_code < 300
and request.META.get('HTTP_IF_NONE_MATCH') == etag):
cookies = response.cookies
response = http.HttpResponseNotModified()
response.cookies = cookies
else:
response['ETag'] = etag
return response
def patch_response_headers(response, cache_timeout=None):
"""
Add HTTP caching headers to the given HttpResponse: 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'):
if hasattr(response, 'render') and callable(response.render):
response.add_post_render_callback(set_response_etag)
else:
response = set_response_etag(response)
if not response.has_header('Expires'):
response['Expires'] = http_date(time.time() + cache_timeout)
patch_cache_control(response, max_age=cache_timeout)
def process_response(self, request, response):
"""
Calculate the ETag, if needed.
When the status code of the response is 404, it may redirect to a path
with an appended slash if should_redirect_with_slash() returns True.
"""
# If the given URL is "Not Found", then check if we should redirect to
# a path with a slash appended.
if response.status_code == 404:
if self.should_redirect_with_slash(request):
return self.response_redirect_class(self.get_full_path_with_slash(request))
if settings.USE_ETAGS:
if not response.has_header('ETag'):
set_response_etag(response)
if response.has_header('ETag'):
return get_conditional_response(
request,
etag=unquote_etag(response['ETag']),
response=response,
)
return response
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'):
if hasattr(response, 'render') and callable(response.render):
response.add_post_render_callback(set_response_etag)
else:
response = set_response_etag(response)
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 process_response(self, request, response):
"""
Calculate the ETag, if needed.
When the status code of the response is 404, it may redirect to a path
with an appended slash if should_redirect_with_slash() returns True.
"""
# If the given URL is "Not Found", then check if we should redirect to
# a path with a slash appended.
if response.status_code == 404:
if self.should_redirect_with_slash(request):
return self.response_redirect_class(self.get_full_path_with_slash(request))
if settings.USE_ETAGS:
if not response.has_header('ETag'):
set_response_etag(response)
if response.has_header('ETag'):
return get_conditional_response(
request,
etag=unquote_etag(response['ETag']),
response=response,
)
return response
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'):
if hasattr(response, 'render') and callable(response.render):
response.add_post_render_callback(set_response_etag)
else:
response = set_response_etag(response)
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 process_response(self, request, response):
"""
Calculate the ETag, if needed.
"""
if settings.USE_ETAGS:
if response.has_header('ETag'):
etag = response['ETag']
elif response.streaming:
etag = None
else:
etag = '"%s"' % hashlib.md5(response.content).hexdigest()
if etag is not None:
if (200 <= response.status_code < 300
and request.META.get('HTTP_IF_NONE_MATCH') == etag):
cookies = response.cookies
response = http.HttpResponseNotModified()
response.cookies = cookies
else:
response['ETag'] = etag
return response
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'):
if hasattr(response, 'render') and callable(response.render):
response.add_post_render_callback(_set_response_etag)
else:
response = _set_response_etag(response)
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 process_response(self, request, response):
"""
Calculate the ETag, if needed.
When the status code of the response is 404, it may redirect to a path
with an appended slash if should_redirect_with_slash() returns True.
"""
# If the given URL is "Not Found", then check if we should redirect to
# a path with a slash appended.
if response.status_code == 404:
if self.should_redirect_with_slash(request):
return self.response_redirect_class(self.get_full_path_with_slash(request))
if settings.USE_ETAGS and self.needs_etag(response):
if not response.has_header('ETag'):
set_response_etag(response)
if response.has_header('ETag'):
return get_conditional_response(
request,
etag=response['ETag'],
response=response,
)
# Add the Content-Length header to non-streaming responses if not
# already set.
if not response.streaming and not response.has_header('Content-Length'):
response['Content-Length'] = str(len(response.content))
return response
def process_response(self, request, response):
"""
Calculate the ETag, if needed.
When the status code of the response is 404, it may redirect to a path
with an appended slash if should_redirect_with_slash() returns True.
"""
# If the given URL is "Not Found", then check if we should redirect to
# a path with a slash appended.
if response.status_code == 404:
if self.should_redirect_with_slash(request):
return self.response_redirect_class(self.get_full_path_with_slash(request))
if settings.USE_ETAGS and self.needs_etag(response):
warnings.warn(
"The USE_ETAGS setting is deprecated in favor of "
"ConditionalGetMiddleware which sets the ETag regardless of "
"the setting. CommonMiddleware won't do ETag processing in "
"Django 2.1.",
RemovedInDjango21Warning
)
if not response.has_header('ETag'):
set_response_etag(response)
if response.has_header('ETag'):
return get_conditional_response(
request,
etag=response['ETag'],
response=response,
)
# Add the Content-Length header to non-streaming responses if not
# already set.
if not response.streaming and not response.has_header('Content-Length'):
response['Content-Length'] = str(len(response.content))
return response
def patch_response_headers(response, cache_timeout=None):
"""
Add HTTP caching headers to the given HttpResponse: 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'):
warnings.warn(
"The USE_ETAGS setting is deprecated in favor of "
"ConditionalGetMiddleware which sets the ETag regardless of the "
"setting. patch_response_headers() won't do ETag processing in "
"Django 2.1.",
RemovedInDjango21Warning
)
if hasattr(response, 'render') and callable(response.render):
response.add_post_render_callback(set_response_etag)
else:
response = set_response_etag(response)
if not response.has_header('Expires'):
response['Expires'] = http_date(time.time() + cache_timeout)
patch_cache_control(response, max_age=cache_timeout)
def process_response(self, request, response):
"""
Calculate the ETag, if needed.
When the status code of the response is 404, it may redirect to a path
with an appended slash if should_redirect_with_slash() returns True.
"""
# If the given URL is "Not Found", then check if we should redirect to
# a path with a slash appended.
if response.status_code == 404:
if self.should_redirect_with_slash(request):
return self.response_redirect_class(self.get_full_path_with_slash(request))
if settings.USE_ETAGS and self.needs_etag(response):
warnings.warn(
"The USE_ETAGS setting is deprecated in favor of "
"ConditionalGetMiddleware which sets the ETag regardless of "
"the setting. CommonMiddleware won't do ETag processing in "
"Django 2.1.",
RemovedInDjango21Warning
)
if not response.has_header('ETag'):
set_response_etag(response)
if response.has_header('ETag'):
return get_conditional_response(
request,
etag=response['ETag'],
response=response,
)
# Add the Content-Length header to non-streaming responses if not
# already set.
if not response.streaming and not response.has_header('Content-Length'):
response['Content-Length'] = str(len(response.content))
return response
