Data extraction from /Filter /FlateDecode PDF stream in PHP

Question

I can not decrypt the data from the stream like:

    56 0 obj 
    << /Length 1242 /Filter /FlateDecode >>
    stream
    x]êΩnƒ Ñ{ûbÀKq¬æ\\âê¢..         


        

Answer 1

Long overdue, but someone might find it helpful. In this case: << /Length 1242 /Filter /FlateDecode >> all you need is to pass the isolated binary string (so basically everything between "stream" and "endstream") to zlib.decompress:

import zlib
stream = b"êΩnƒ Ñ{ûbÀKq¬æ\âê"  # binary stream here
data = zlib.decompress(stream) # Here you have your clean decompressed stream

However, if you have/DecodeParms in your PDF object thing become complicated. You will need the /Predictor value and columns number. Better use PyPDF2 for this.