def modified(date=None, etag=None):
"""
Checks to see if the page has been modified since the version in the
requester's cache.
When you publish pages, you can include `Last-Modified` and `ETag`
with the date the page was last modified and an opaque token for
the particular version, respectively. When readers reload the page,
the browser sends along the modification date and etag value for
the version it has in its cache. If the page hasn't changed,
the server can just return `304 Not Modified` and not have to
send the whole page again.
This function takes the last-modified date `date` and the ETag `etag`
and checks the headers to see if they match. If they do, it returns
`True` and sets the response status to `304 Not Modified`. It also
sets `Last-Modified and `ETag` output headers.
"""
n = set(x.strip('" ') for x in web.ctx.env.get('HTTP_IF_NONE_MATCH', '').split(','))
m = net.parsehttpdate(web.ctx.env.get('HTTP_IF_MODIFIED_SINCE', '').split(';')[0])
validate = False
if etag:
if '*' in n or etag in n:
validate = True
if date and m:
# we subtract a second because
# HTTP dates don't have sub-second precision
if date-datetime.timedelta(seconds=1) <= m:
validate = True
if validate: web.ctx.status = '304 Not Modified'
lastmodified(date)
web.header('ETag', '"' + etag + '"')
return not validate
def modified(date=None, etag=None):
n = web.ctx.env.get('HTTP_IF_NONE_MATCH')
m = net.parsehttpdate(web.ctx.env.get('HTTP_IF_MODIFIED_SINCE', '').split(';')[0])
validate = False
if etag:
raise NotImplementedError, "no etag support yet"
# should really be a warning
if date and m:
# we subtract a second because
# HTTP dates don't have sub-second precision
if date-datetime.timedelta(seconds=1) <= m:
validate = True
if validate: web.ctx.status = '304 Not Modified'
return not validate
def modified(date=None, etag=None):
n = set(x.strip('" ') for x in web.ctx.env.get('HTTP_IF_NONE_MATCH', '').split(','))
m = net.parsehttpdate(web.ctx.env.get('HTTP_IF_MODIFIED_SINCE', '').split(';')[0])
validate = False
if etag:
if '*' in n or etag in n:
validate = True
if date and m:
# we subtract a second because
# HTTP dates don't have sub-second precision
if date-datetime.timedelta(seconds=1) <= m:
validate = True
if validate: web.ctx.status = '304 Not Modified'
return not validate
def modified(date=None, etag=None):
n = web.ctx.env.get('HTTP_IF_NONE_MATCH')
m = net.parsehttpdate(
web.ctx.env.get('HTTP_IF_MODIFIED_SINCE', '').split(';')[0])
validate = False
if etag:
raise NotImplementedError, "no etag support yet"
# should really be a warning
if date and m:
# we subtract a second because
# HTTP dates don't have sub-second precision
if date - datetime.timedelta(seconds=1) <= m:
validate = True
if validate: web.ctx.status = '304 Not Modified'
return not validate
def modified(date=None, etag=None):
n = set(
x.strip('" ')
for x in web.ctx.env.get('HTTP_IF_NONE_MATCH', '').split(','))
m = net.parsehttpdate(
web.ctx.env.get('HTTP_IF_MODIFIED_SINCE', '').split(';')[0])
validate = False
if etag:
if '*' in n or etag in n:
validate = True
if date and m:
# we subtract a second because
# HTTP dates don't have sub-second precision
if date - datetime.timedelta(seconds=1) <= m:
validate = True
if validate: web.ctx.status = '304 Not Modified'
return not validate
def modified(date=None, etag=None):
"""
Checks to see if the page has been modified since the version in the
requester's cache.
When you publish pages, you can include `Last-Modified` and `ETag`
with the date the page was last modified and an opaque token for
the particular version, respectively. When readers reload the page,
the browser sends along the modification date and etag value for
the version it has in its cache. If the page hasn't changed,
the server can just return `304 Not Modified` and not have to
send the whole page again.
This function takes the last-modified date `date` and the ETag `etag`
and checks the headers to see if they match. If they do, it returns
`True`, or otherwise it raises NotModified error. It also sets
`Last-Modified` and `ETag` output headers.
"""
try:
from __builtin__ import set
except ImportError:
from sets import Set as set
n = set([x.strip('" ')
for x in web.ctx.env.get('HTTP_IF_MODIFIED_SINCE', '').split(',')])
m = net.parsehttpdate(
web.ctx.env.get('HTTP_IF_MODIFIED_SINCE', '').split(';')[0])
validate = False
if etag:
if '*' in n or etag in n:
validate = True
if date and m:
if date - datetime.timedelta(seconds=1) <= m:
validate = True
if date:
lastmodified(date)
if etag:
web.header('ETag', '"' + etag + '"')
if validate:
raise web.NotModified()
else:
return True