Script calling Facebook's robot to visit URLs from a RSS feed.

call_facebook_robot.py

#!/usr/bin/env python

import feedparser
import os
import pickle
import sys
import time
import urllib

facebook_lint = 'https://developers.facebook.com/tools/lint?url='

if (len(sys.argv) != 2):
    print 'Usage: %s <rss>' % sys.argv[0]
    sys.exit(1)

feed = feedparser.parse(sys.argv[1])

cache = []
cache_filename = 'facebook_cache.pkl'
if os.path.isfile(cache_filename):
    cache_file = open(cache_filename, 'rb')
    cache = pickle.load(cache_file)

for item in feed.entries:
    if item.link not in cache:
        print "Call Facebook robot to visit '%s'" % item.link
        cache.append(item.link)
        urllib.urlopen('%s%s' % (facebook_lint, urllib.quote(item.link)))
        time.sleep(5)

cache_file = open(cache_filename, 'wb')
pickle.dump(cache, cache_file)
cache_file.close()