A script I made in 2013 to download all images from a 4chan thread. Works with Python 2.7

4chan.py

#!/usr/bin/env python
#4chan image downloader
 
import urllib
import re
import sys
import os

usage = """
Usage:
./4chan.py <download dir> <thread>
Example: ./4chan.py /home/user/images/ http://boards.4chan.org/fit/res/13727107

"""

if len(sys.argv) < 3:
	print usage
	sys.exit()

localfolder = str(sys.argv[1])

if localfolder[-1:] != "/":
	localfolder = localfolder + "/"

if os.path.isdir(localfolder) is False:
	print "Creating " + localfolder
	os.makedirs(localfolder)

downloadurl = sys.argv[2]
imageurl = urllib.urlopen(downloadurl).read()

print "Downloading all images from " + downloadurl
regex = '<a class="fileThumb" href="//(.+?)" target="_blank">'
upattern = re.compile(regex)
images = re.findall(regex, imageurl)
print "Found " + str(len(images)) + " images:"

i = 0
while i < len(images):
	image = images[i]
	dlurl = "http://" + image
	print "Downloading: http://" + image
	index1 = image.find("src/")
	downloaddir = localfolder + image[index1 + 4:]
	urllib.urlretrieve(dlurl, filename=downloaddir )
	i += 1

print "Finished."