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Controlling gzipped I/O (Python recipe) by Keisuke URAGO
ActiveState Code (http://code.activestate.com/recipes/148292/)

Using gzip and StringIO module, then controllable gzipped stream.

Python, 26 lines
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# gzipout.py
from gzip import GzipFile
from StringIO import StringIO

sio = StringIO()
gzf = GzipFile(fileobj=sio, mode='wb')
gzf.write(sys.stdin.read())
gzf.close()

# Output gzipped stream.
sys.stdout.write(sio.getvalue())

# It is performed as follows for trying operation on shell.
# $ cat textfile | python gzipout.py | zcat

# Moreover, since socket object used for network programming
# cannot do seek(), it is once copied to StringIO.

# gzipin.py
from gzip import GzipFile
from StringIO import StringIO

gzstream = open('gzipped.gz', 'rb')
sio = StringIO(gzstream)
gz = GzipFile(fileobj=sio, mode='rb')
print gz.read()

It must be useful to the time of wanting to treat stream compressed by mod_gzip of Apache, and the data compression of transmission programs.

I found exmaple code for mod_python http://www.modpython.org in CVS use like this tip. See also http://cvs.apache.org/viewcvs.cgi/httpd-python/examples/gzipfilter.py?rev=1.1&content-type=text/vnd.viewcvs-markup

Tags: programs