Lengthen Short URL with service longurl.org

urls.py

#!/usr/bin/env python
#
# Scott Hendrickson
#  2012-03-18
#

import sys
import re
import urllib
import httplib2
import json

# URLS
r1 = r"(\b(http|https)://([-A-Za-z0-9+&@#/%?=~_()|!:,.;]*[-A-Za-z0-9+&@#/%=~_()|]))"
urlRE = re.compile(r1)

#########################
# http://longurl.org/api

http = httplib2.Http()
header = { 'User-Agent' : 'Mozilla/5.0' }
urlsUnrolled = 'http://api.longurl.org/v2/services?format=json'
response, content = http.request(urlsUnrolled, 'GET', headers=header)
# list contains all valid domains - don't try to process invalid domains
domainList = json.loads(content)

def unroll(x):
        # x e.g. "http://bit.ly/asdfg"
        domain = x.split('/')[2]
        if domain in domainList:
                u = 'http://api.longurl.org/v2/expand?url='+urllib.quote(x)
                response, content = http.request(u, 'GET', headers=header)
                # response verification here some day?
                tmp = urlRE.search(content)
                if tmp is not None:
                        return tmp.group(0)
                else:
                        return x
        else:
                return x
##########################

for r in sys.stdin:
        # r is some text containing 1 or more urls
        for x in urlRE.findall(r.strip()):
                print unroll(x[0])