def drupal_page_cache_header(cache):
"""
Set HTTP headers in preparation for a cached page response.
The general approach here is that anonymous users can keep a local
cache of the page, but must revalidate it on every request. Then,
they are given a '304 Not Modified' response as long as they stay
logged out and the page has not been modified.
"""
# Set default values:
last_modified = php.gmdate("D, d M Y H:i:s", cache.created) + " GMT"
etag = '"' + drupy_md5(last_modified) + '"'
# See if the client has provided the required HTTP headers:
if_modified_since = (
php.stripslashes(php.SERVER["HTTP_IF_MODIFIED_SINCE"])
if php.isset(php.SERVER, "HTTP_IF_MODIFIED_SINCE")
else False
)
if_none_match = (
php.stripslashes(php.SERVER["HTTP_IF_NONE_MATCH"]) if php.isset(php.SERVER, "HTTP_IF_NONE_MATCH") else False
)
if (
if_modified_since
and if_none_match
and if_none_match == etag # etag must match
and if_modified_since == last_modified
): # if-modified-since must match
php.header(php.SERVER["SERVER_PROTOCOL"] + " 304 Not Modified")
# All 304 responses must send an etag if the 200 response for the same
# object contained an etag
php.header("Etag: %(etag)s" % {"etag": etag})
exit()
# Send appropriate response:
php.header("Last-Modified: %(last_modified)s" % {"last_modified": last_modified})
php.header("Etag: %(etag)s" % {"etag": etag})
# The following headers force validation of cache:
php.header("Expires: Sun, 19 Nov 1978 05:00:00 GMT")
php.header("Cache-Control: must-revalidate")
if variable_get("page_compression", True):
# Determine if the browser accepts gzipped data.
if php.strpos(php.SERVER["HTTP_ACCEPT_ENCODING"], "gzip") == False and php.function_exists("gzencode"):
# Strip the gzip php.header and run uncompress.
cache.data = php.gzinflate(php.substr(php.substr(cache.data, 10), 0, -8))
elif php.function_exists("gzencode"):
php.header("Content-Encoding: gzip")
# Send the original request's headers. We send them one after
# another so PHP's php.header() def can deal with duplicate
# headers.
headers = php.explode("\n", cache.headers)
for php.header_ in headers:
php.header(php.header_)
print cache.data
def drupal_page_cache_header(cache):
"""
Set HTTP headers in preparation for a cached page response.
The general approach here is that anonymous users can keep a local
cache of the page, but must revalidate it on every request. Then,
they are given a '304 Not Modified' response as long as they stay
logged out and the page has not been modified.
"""
# Set default values:
last_modified = php.gmdate('D, d M Y H:i:s', cache.created) + ' GMT'
etag = '"' + drupy_md5(last_modified) + '"'
# See if the client has provided the required HTTP headers:
if_modified_since = (php.stripslashes(php.SERVER['HTTP_IF_MODIFIED_SINCE']) \
if php.isset(php.SERVER, 'HTTP_IF_MODIFIED_SINCE') else False)
if_none_match = (php.stripslashes(php.SERVER['HTTP_IF_NONE_MATCH']) \
if php.isset(php.SERVER, 'HTTP_IF_NONE_MATCH') else False)
if (if_modified_since and if_none_match
and if_none_match == etag # etag must match
and if_modified_since
== last_modified): # if-modified-since must match
php.header(php.SERVER['SERVER_PROTOCOL'] + ' 304 Not Modified')
# All 304 responses must send an etag if the 200 response for the same
# object contained an etag
php.header("Etag: %(etag)s" % {'etag': etag})
exit()
# Send appropriate response:
php.header("Last-Modified: %(last_modified)s" % \
{'last_modified':last_modified})
php.header("Etag: %(etag)s" % {'etag': etag})
# The following headers force validation of cache:
php.header("Expires: Sun, 19 Nov 1978 05:00:00 GMT")
php.header("Cache-Control: must-revalidate")
if (variable_get('page_compression', True)):
# Determine if the browser accepts gzipped data.
if (php.strpos(php.SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') == False and \
php.function_exists('gzencode')):
# Strip the gzip php.header and run uncompress.
cache.data = php.gzinflate(
php.substr(php.substr(cache.data, 10), 0, -8))
elif (php.function_exists('gzencode')):
php.header('Content-Encoding: gzip')
# Send the original request's headers. We send them one after
# another so PHP's php.header() def can deal with duplicate
# headers.
headers = php.explode("\n", cache.headers)
for php.header_ in headers:
php.header(php.header_)
print cache.data
