In Python how to add headers for a file after gzip before writing it

Question

I am trying to open a javascript file, read it, gzip it and then write it back to another file.. able to do all that.. but how can set the "Content-Encoding : gzip" before writing the compressed content... here is the code:

import os, sys, mimetypes, zipfile, gzip, cStringIO
from optparse import OptionParser
def main():
    parser = OptionParser(usage='usage: %prog [options] src_file destination_file')
    parser.add_option('-x', '--expires', action='store_true', help='set far future expiry for all files')
    (options, args) = parser.parse_args()
    if len(args) != 2:
        parser.error("incorrect number of arguments")
    name = os.path.normpath(args[0])
    des_file = os.path.normpath(args[1])

    try:
        s_file = open(name, 'r')
        content = s_file.read()

        compressed = cStringIO.StringIO()
        gz = gzip.GzipFile(filename=name,  mode='w', fileobj=compressed)
        gz.write(content)
        gz.close()
        s_file.close()

        o_file = open(des_file, 'w')
        ##
        ## BEFORE WRITING THE CONTENT INTO A FILE HOW WE ADD THE Content-Encoding
        ##
        o_file.write(compressed.getvalue())
        o_file.close()

    except (IOError, os.error), why:
        print 'Failed to read the file', filename, '\n Exception:', why

hmm, that just adds the an extra line in the gzip'ed file.. does not really add it to the file header! — Santosh S Kumar, Sep 29 '11 at 13:04
There is no such think as content-encoding for a file. That's an HTTP header. — jterrace, Sep 29 '11 at 13:09

the wolf · Answer 1 · 2011-09-29T22:00:40.303

0

That is usually determined by whatever is serving the file. Your job is usually limited to setting the correct file name extension (.gz in this case) when you create the file and configuring the server properly.

edited Sep 29 '11 at 22:00

answered Sep 29 '11 at 16:10

the wolf

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In Python how to add headers for a file after gzip before writing it

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