2chdd.py

#!/usr/bin/env python3


import re
import subprocess


site = 'https://2ch.hk'
rx = r'/[^/]*?/src/\d+/\d+.\w{3,4}'

def main(argv):
    if len(argv) < 2:
        print('Usage: python3 2chdd.py <link-to-thread>')
        return 1

    link = argv[1]

    proc = subprocess.Popen(['wget', '-O', '-', link], stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)

    page = proc.stdout.read().decode()
    proc.wait()

    links = set(re.findall(rx, page))

    with open('links.txt','w') as link_file:
        link_file.writelines([site+link+'\n' for link in links])

    proc = subprocess.run(['wget', '-nc', '-i', 'links.txt', '-q', '--show-progress'])

    return 0


if __name__ == '__main__':
    import sys
    exit(main(sys.argv))