#copy this text to a new .txt file, then change the extension to .py
#you'll need python 3.0 to run this file (all you'd need to do is download and install it, then double click the .py file you just created)
#64 bit Windows download link: https://www.python.org/ftp/python/3.6.1/python-3.6.1-amd64.exe
#32 bit Windows download link: https://www.python.org/ftp/python/3.6.1/python-3.6.1.exe

#! /usr/bin/python3
# -*- coding: utf-8 -*-
import urllib.request, urllib.error, urllib.parse, urllib.request, urllib.parse, urllib.error, http.cookiejar
import http.client
import json
import pprint
import os.path

URL_WGCAT = "http://a.4cdn.org/wg/catalog.json"
#http://a.4cdn.org/wg/thread/4667225.json
URL_THREAD = "http://a.4cdn.org/wg/thread/"
URL_IMG = "https://i.4cdn.org/wg/"
def newOpener():
        cj = http.cookiejar.CookieJar()
        opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))
        opener.addheaders.append(('User-agent', "wg image downloader"))
        return opener

def postStuff(opener,site,postData, refer="",printResp =False):
        postData = urllib.parse.urlencode(postData)
        if refer != "":
                opener.addheaders.append( ('Referer', refer) )

        resp = opener.open(site, postData,timeOut)
        if printResp:
                return resp.read();


def main():
    o = newOpener()
    resp = o.open(URL_WGCAT)

    pp = pprint.PrettyPrinter(indent=2)

    pages = json.load(resp)
    threads = []
    for p in pages:
        print((p['page']))
        for t in p['threads']:
            print((t['no']))
            threads.append(t['no'])

    for t in threads:
        tjson = o.open(URL_THREAD+str(t)+".json")
        tvar  = json.load(tjson)
        print(( "thread: " +str(t)))
        for post in tvar['posts']:
            try:
                #print "width: "+str(post['w']) + ", height: " + str(post['h'])+",ratio: "+str(post['w']/float(post['h']))+", image id: "+ str(post['tim'])+str(post['ext'])

                if (post['w']==2560)  and (post['h'] ==1440):

                    if os.path.isfile(str(post['tim'])+str(post['ext'])):
                        continue

                    print(("width: "+str(post['w']) + ", height: " + str(post['h'])+",ratio: "+str(post['w']/float(post['h']))+", image id: "+ str(post['tim'])+str(post['ext'])))
                    img = o.open(URL_IMG+str(post['tim'])+str(post['ext'])).read()
                    f = open(str(post['tim'])+str(post['ext']),'wb')
                    f.write(img)
                    f.close()

                    #ratio219.append(str(post['tim'])+str(post['ext']))
            except KeyError:
                #print "post has no image"
                pass
            except Exception as e:
                print((repr(e)))
    #pp.pprint(json.load(resp))


if __name__ == "__main__":
    #Run as main program
    main()