def send_preamble(self):
"""Transmit version/status/date/server, via self._write()"""
if self.origin_server:
if self.client_is_modern():
self._write('HTTP/%s %s\r\n' %
(self.http_version, self.status))
if 'Date' not in self.headers:
self._write('Date: %s\r\n' % http_date())
if self.server_software and 'Server' not in self.headers:
self._write('Server: %s\r\n' % self.server_software)
else:
self._write('Status: %s\r\n' % self.status)
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 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 send_preamble(self):
"""Transmit version/status/date/server, via self._write()"""
if self.origin_server:
if self.client_is_modern():
self._write('HTTP/%s %s\r\n' % (self.http_version,self.status))
if 'Date' not in self.headers:
self._write(
'Date: %s\r\n' % http_date()
)
if self.server_software and 'Server' not in self.headers:
self._write('Server: %s\r\n' % self.server_software)
else:
self._write('Status: %s\r\n' % self.status)
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 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 __call__(self, environ, start_response):
import os.path
# Ignore requests that aren't under ADMIN_MEDIA_PREFIX. Also ignore
# all requests if ADMIN_MEDIA_PREFIX isn't a relative URL.
if self.media_url.startswith('http://') or self.media_url.startswith(
'https://') or not environ['PATH_INFO'].startswith(
self.media_url):
return self.application(environ, start_response)
# Find the admin file and serve it up, if it exists and is readable.
try:
file_path = self.file_path(environ['PATH_INFO'])
except ValueError: # Resulting file path was not valid.
status = '404 NOT FOUND'
headers = {'Content-type': 'text/plain'}
output = ['Page not found: %s' % environ['PATH_INFO']]
start_response(status, headers.items())
return output
if not os.path.exists(file_path):
status = '404 NOT FOUND'
headers = {'Content-type': 'text/plain'}
output = ['Page not found: %s' % environ['PATH_INFO']]
else:
try:
fp = open(file_path, 'rb')
except IOError:
status = '401 UNAUTHORIZED'
headers = {'Content-type': 'text/plain'}
output = ['Permission denied: %s' % environ['PATH_INFO']]
else:
# This is a very simple implementation of conditional GET with
# the Last-Modified header. It makes media files a bit speedier
# because the files are only read off disk for the first
# request (assuming the browser/client supports conditional
# GET).
mtime = http_date(os.stat(file_path)[stat.ST_MTIME])
headers = {'Last-Modified': mtime}
if environ.get('HTTP_IF_MODIFIED_SINCE', None) == mtime:
status = '304 NOT MODIFIED'
output = []
else:
status = '200 OK'
mime_type = mimetypes.guess_type(file_path)[0]
if mime_type:
headers['Content-Type'] = mime_type
output = [fp.read()]
fp.close()
start_response(status, headers.items())
return output
def __call__(self, environ, start_response):
import os.path
# Ignore requests that aren't under ADMIN_MEDIA_PREFIX. Also ignore
# all requests if ADMIN_MEDIA_PREFIX isn't a relative URL.
if self.media_url.startswith('http://') or self.media_url.startswith('https://') or not environ['PATH_INFO'].startswith(self.media_url):
return self.application(environ, start_response)
# Find the admin file and serve it up, if it exists and is readable.
try:
file_path = self.file_path(environ['PATH_INFO'])
except ValueError: # Resulting file path was not valid.
status = '404 NOT FOUND'
headers = {'Content-type': 'text/plain'}
output = ['Page not found: %s' % environ['PATH_INFO']]
start_response(status, headers.items())
return output
if not os.path.exists(file_path):
status = '404 NOT FOUND'
headers = {'Content-type': 'text/plain'}
output = ['Page not found: %s' % environ['PATH_INFO']]
else:
try:
fp = open(file_path, 'rb')
except IOError:
status = '401 UNAUTHORIZED'
headers = {'Content-type': 'text/plain'}
output = ['Permission denied: %s' % environ['PATH_INFO']]
else:
# This is a very simple implementation of conditional GET with
# the Last-Modified header. It makes media files a bit speedier
# because the files are only read off disk for the first
# request (assuming the browser/client supports conditional
# GET).
mtime = http_date(os.stat(file_path)[stat.ST_MTIME])
headers = {'Last-Modified': mtime}
if environ.get('HTTP_IF_MODIFIED_SINCE', None) == mtime:
status = '304 NOT MODIFIED'
output = []
else:
status = '200 OK'
mime_type = mimetypes.guess_type(file_path)[0]
if mime_type:
headers['Content-Type'] = mime_type
output = [fp.read()]
fp.close()
start_response(status, headers.items())
return output
