Get all html meta tag with facebookexternalhit/1.1 user agent

fbbot.py

#!/usr/bin/env python
from BeautifulSoup import BeautifulSoup
import urllib2
import sys

if len(sys.argv) < 2 :
    print 'Usage : fbbot.py URL'
    exit()

http = urllib2.build_opener()
http.addheaders = [('User-agent', 'facebookexternalhit/1.1')]
try :
    page = http.open(sys.argv[1])
    soup = BeautifulSoup(page.read())
    for m in soup.findAll('meta'):
        print m
except ValueError:
    print 'Invalid URL'