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#
# Usage:
# <Directory /where/ever>
# PythonOutputFilter gzipfilter
# SetOutputFilter gzipfilter
# </Directory>
from mod_python import apache
import os
import sys
import gzip
import cStringIO
from mod_python import apache
def compress(s):
sio = cStringIO.StringIO()
f = gzip.GzipFile(mode='wb', fileobj=sio)
f.write(s)
f.close()
return sio.getvalue()
def accepts_gzip(req):
if req.headers_in.has_key('accept-encoding'):
encodings = req.headers_in['accept-encoding']
return (encodings.find("gzip") != -1)
return 0
###
### main filter function
###
def outputfilter(filter):
if (filter.req.main or
not accepts_gzip(filter.req)):
# Presense of filter.req.main tells us that
# we are in a subrequest. We don't want to compress
# the data more than once, so we pass_on() in
# subrequests. We also pass_on() if the client
# does not accept gzip encoding, of course.
filter.pass_on()
else:
if not filter.req.sent_bodyct:
# the above test allows us to set the encoding once
# rather than every time the filter is invoked
filter.req.headers_out['content-encoding'] = 'gzip'
# loop through content, compressing
s = filter.read()
while s:
s = compress(s)
filter.write(s)
s = filter.read()
if s is None:
# this means we received an EOS, so we pass it on
# by closing the filter
filter.close()
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