Loop through header information in a ZIP file : File Zip « File « Python

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Python » File » File Zip

Loop through header information in a ZIP file



import struct



data = open('myfile.zip', 'rb').read()

start = 0

for i in range(3):                      # show the first 3 file headers

    start += 14

    fields = struct.unpack('LLLHH', data[start:start+16])

    crc32, comp_size, uncomp_size, filenamesize, extra_size = fields



    start += 16

    filename = data[start:start+filenamesize]

    start += filenamesize

    extra = data[start:start+extra_size]

    print filename, hex(crc32), comp_size, uncomp_size



    start += extra_size + comp_size     # skip to the next header

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