Python Compare local and remote file MD5 Hash

Question

I am trying to compare Local and remote file MD5 hash (the same file i copy/paste in my wamp "www" directory), but I don't understand why the "checksums" are not corresponding...

Here's the checksum code:

#-*- coding: utf-8 -*-

import hashlib
import requests

def md5Checksum(filePath,url):
    if url==None:
        with open(filePath, 'rb') as fh:
            m = hashlib.md5()
            while True:
                data = fh.read(8192)
                if not data:
                    break
                m.update(data)
            return m.hexdigest()
    else:
        r = requests.get(url, stream=True)
        m = hashlib.md5()
        for line in r.iter_lines():
            m.update(line)
        return m.hexdigest()

print "checksum_local :",md5Checksum("projectg715gb.pak",None)
print "checksum_remote :",md5Checksum(None,"http://testpangya.ddns.net/projectg715gb.pak")

And I am suprised to get this output :

checksum_local : 9d33806fdebcb91c3d7bfee7cfbe4ad7
checksum_remote : a13aaeb99eb020a0bc8247685c274e7d

The size of "projectg715gb.pak" is 14.7Mb

But if I try with a text file (size 1Kb) :

print "checksum_local :",md5Checksum("toto.txt",None)
print "checksum_remote :",md5Checksum(None,"http://testpangya.ddns.net/toto.txt")

Then it works oO I get this output :

checksum_local : f71dbe52628a3f83a77ab494817525c6
checksum_remote : f71dbe52628a3f83a77ab494817525c6

I am new to comparing MD5 hash so be nice please ^^' I might have done some big mistake, I don't understand why it doesn't work on big files, if someone could give me a hint, it would be super nice!

However thanks for reading and helping !

Answer 1

So thanks to helpers here's the final code working :

#-*- coding: utf-8 -*-

import hashlib
import requests

def md5Checksum(filePath,url):
    m = hashlib.md5()
    if url==None:
        with open(filePath, 'rb') as fh:
            m = hashlib.md5()
            while True:
                data = fh.read(8192)
                if not data:
                    break
                m.update(data)
            return m.hexdigest()
    else:
        r = requests.get(url)
        for data in r.iter_content(8192):
             m.update(data)
        return m.hexdigest()

print "checksum_local :",md5Checksum("projectg715gb.pak",None)
print "checksum_remote :",md5Checksum(None,"http://testpangya.ddns.net/projectg715gb.pak")