ConnectionResetError: An existing connection was forcibly closed by the remote host
<p>I'm working on a script to download a group of files. I successfully completed this and it's working decently. Now I have tried adding a dynamic printout of the progression of the download. </p>

<p>For small downloads (it's of .mp4 files by the way) such as 5MB, the progression works great and the file closes successfully, thus resulting in a complete and working downloaded .mp4 file. For larger files, such as 250MB and above, it does not work successfully, I get the following error: </p>

<p><a href="https://i.stack.imgur.com/hztx7.png" rel="noreferrer"><img src="https://i.stack.imgur.com/hztx7.png" alt="enter image description here"></a></p>

<p>And here's my code: </p>

<pre><code>import urllib.request
import shutil
import os
import sys
import io

script_dir = os.path.dirname('C:/Users/Kenny/Desktop/')
rel_path = 'stupid_folder/video.mp4'
abs_file_path = os.path.join(script_dir, rel_path)
url = 'https://archive.org/download/SF145/SF145_512kb.mp4'
# Download the file from `url` and save it locally under `file_name`:

with urllib.request.urlopen(url) as response, open(abs_file_path, 'wb') as out_file:

    eventID = 123456

    resp = urllib.request.urlopen(url)
    length = resp.getheader('content-length')
    if length:
        length = int(length)
        blocksize = max(4096, length//100)
    else:
        blocksize = 1000000 # just made something up

    # print(length, blocksize)

    buf = io.BytesIO()
    size = 0
    while True:
        buf1 = resp.read(blocksize)
        if not buf1:
            break
        buf.write(buf1)
        size += len(buf1)
        if length:
            print('\r[{:.1f}%] Downloading: {}'.format(size/length*100, eventID), end='')#print('\rDownloading: {:.1f}%'.format(size/length*100), end='')
    print()

    shutil.copyfileobj(response, out_file)
</code></pre>

<p>This works perfectly with small files, but larger ones I get the error. Now, I do NOT get the error, however, with larger files if I comment out the <em>progress</em> indicator code: </p>

<pre><code>with urllib.request.urlopen(url) as response, open(abs_file_path, 'wb') as out_file:

    # eventID = 123456
    # 
    # resp = urllib.request.urlopen(url)
    # length = resp.getheader('content-length')
    # if length:
    #     length = int(length)
    #     blocksize = max(4096, length//100)
    # else:
    #     blocksize = 1000000 # just made something up
    # 
    # # print(length, blocksize)
    # 
    # buf = io.BytesIO()
    # size = 0
    # while True:
    #     buf1 = resp.read(blocksize)
    #     if not buf1:
    #         break
    #     buf.write(buf1)
    #     size += len(buf1)
    #     if length:
    #         print('\r[{:.1f}%] Downloading: {}'.format(size/length*100, eventID), end='')#print('\rDownloading: {:.1f}%'.format(size/length*100), end='')
    # print()

    shutil.copyfileobj(response, out_file)
</code></pre>

<p>Does anyone have any ideas? This is the last part of my project and I would really like to be able to see the progress. Once again, this is Python 3.5. Thanks for any help provided!</p>