Python3 Facebook Album Downloader: Album ID and Graph API Access token are required

facebook_album_downloader.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Get an access token here:
# https://developers.facebook.com/tools/explorer/
#
# Get the album id from the url when watching the album
# in your browser.


import sys
import os.path
import getopt
import requests

ACCES_TOKEN = ""
HELPSTRING = "downloader.py -a <album_id> -t <access_token>"


def main(argv):

    try:
        opts, args = getopt.getopt(argv, "ha:t:", ["album=", "token="])
    except getopt.GetoptError:
        print(HELPSTRING)
        sys.exit(2)

    for opt, arg in opts:
        if opt == '-h':
            print(HELPSTRING)
            sys.exit()
        elif opt in ("-a", "--album"):
            album_id = arg
        elif opt in ("-t", "--token"):
            ACCES_TOKEN = arg
        else:
            print(HELPSTRING)
            sys.exit(2)

    if album_id.isdigit():
        created_time, name, album_id = get_album_meta(album_id)
        q = input("Do you want to download '"+name+"' [Y/n] ")
        if q in ("Y", "y", "yes", "Yes"):
            download_album(album_id)


def get_album_meta(album_id):
    r = requests.get("https://graph.facebook.com/v2.8/" + album_id +
                     "?access_token=" + ACCES_TOKEN)
    if r.status_code == 200 and r.json()['name']:
        return r.json()["created_time"], r.json()["name"], r.json()["id"]
    else:
        print("Error: request went wrong or you have no permission to access "
              "this album")
        sys.exit(1)


def get_album_photos(album_id):
    r = requests.get("https://graph.facebook.com/v2.8/" + album_id +
                     "/photos?access_token=" + ACCES_TOKEN)
    return r.json()["data"]


def download_album(album_id):
    photos = get_album_photos(album_id)
    download_urls = []

    for photo in photos:
        uid = photo['id']

        r = requests.get("https://graph.facebook.com/v2.8/" + uid +
                         "?fields=images&access_token="+ACCES_TOKEN)
        print("get download url for picture '"+photo["id"]+"' ...")
        download_urls.append(r.json()["images"][0]['source'])
        # print(r.json()["images"][0]['source'])

    print("There are "+str(len(download_urls))+" pictures in this album")

    if not os.path.exists("./photos"):
        os.makedirs("./photos")

    for url in download_urls:
        filename = url.split('/')[-1]
        path = os.path.abspath("./photos/"+filename)
        print("downlading picture '"+filename+"' ...")

        r = requests.get(url, stream=True)

        with open(path, 'wb') as file:
            total_length = int(r.headers.get('content-length'))
            for chunk in r.iter_content(chunk_size=1024):
                if chunk:
                    file.write(chunk)
                    file.flush()
        if os.path.getsize("./photos/"+filename) == total_length:
            pass
        else:
            print("Error downloading "+filename)


if __name__ == '__main__':
    main(sys.argv[1:])