Re: Python 3 resuma a file download

[MRAB]

On 2015-07-02 21:27, zljubi...@gmail.com wrote:

This is my final version which doesn't work. :(
Actually, it works with another file on another server, but doesn't work with 
mp4 files on this particular server.

I really don't know what to do?

Regards.

import os
import urllib.request

def Download(rfile, lfile):

     retval = False

     if os.path.isfile(lfile):
         lsize = os.stat(lfile).st_size
     else:
         lsize = 0

     req = urllib.request.Request(rfile)

     rfsize = urllib.request.urlopen(req).length

     req.add_header('Range', "bytes={}-".format(lsize))

     response = urllib.request.urlopen(req)

     with open(lfile, 'ab') as out_file:
         while True:
             try:
                 chunk = response.read(64 * 1024)
                 # chunk = response.read(128)
                 if not chunk: break
                 out_file.write(chunk)
                 out_file.flush()


                 lfsize = os.stat(lfile).st_size

                  print("{0:.2f}".format(lfsize / rfsize * 100))
             except ConnectionResetError as e:
                 print('Exception ConnectionResetError 
{0}'.format(os.stat(lfile).st_size))
                 response = urllib.request.urlopen(req)


     if lfsize == rfsize:
         retval = True

     return retval


while not Download('http://video.hrt.hr/2906/otv296.mp4', 'otv296.mp4'):
     print('1')

If a ConnectionResetError is raised, it'll restart the request from the
beginning, but continue appending to the same file. You should reset
the writing too.

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