python - How to determine the IP address of the server after connecting with urllib2?

Question

I am downloading data from a server using urllib2. But I need to determine the IP address of the server to which I am connected.

import urllib2
STD_HEADERS = {'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,
                    */*;q=0.8',
                'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
                'Accept-Language': 'en-us,en;q=0.5',
                'User-Agent': 'Mozilla/5.0 (X11; U; Linux x86_64;en-US;rv:1.9.2.12)     
                           Gecko/20101028 Firefox/3.6.12'}
request = urllib2.Request(url, None, STD_HEADERS)
data =  urllib2.urlopen(request)

Please don't ask me to find the IP address using the URL as this does not guarantee that the server from which the data is downloaded and the IP address query resolve to the same IP address in case of 'HTTPRedirects' or a loadbalancing server

Answer 1

Here's what works for me on Python 2.7:

>>> from urllib2 import urlopen
>>> from socket import fromfd
>>> from socket import AF_INET
>>> from socket import SOCK_STREAM
>>> r = urlopen('http://stackoverflow.com/')
>>> mysockno = r.fileno()
>>> mysock = fromfd( mysockno, AF_INET, SOCK_STREAM)
>>> (ip, port) = mysock.getpeername()
>>> print "got IP %s port %d" % (ip, port)
got IP 198.252.206.140 port 80