Requests, bind to an ip

Question

I have a script that makes some requests with urllib2.

I use the trick suggested elsewhere on Stack Overflow to bind another ip to the application, where my my computer has two ip addresses (IP A and IP B).

I would like to switch to using the requests library. Does anyone knows how I can achieve the same functionality with that library?

Answer 1

Looking into the requests module, it looks like it uses httplib to send the http requests. httplib uses socket.create_connection() to connect to the www host.

Knowing that and following the monkey patching method in the link you provided:

import socket

real_create_conn = socket.create_connection

def set_src_addr(*args):
    address, timeout = args[0], args[1]
    source_address = ('IP_ADDR_TO_BIND_TO', 0)
    return real_create_conn(address, timeout, source_address)

socket.create_connection = set_src_addr

import requests
r = requests.get('http://www.google.com')

It looks like httplib passes all the arguments (to create_connection()) as args (vs keywords) as trying to extend the kwargs dict inside set_src_addr was failing. I believe the above is what you want, but I don't have a dual homed machine to test on.

Answer 2

actually, you should bind IP to requests like this :

import urllib3
real_create_conn = urllib3.util.connection.create_connection

def set_src_addr(address, timeout, *args, **kw):
    source_address = ('YOUR_BIND_IP', 0)
    return real_create_conn(address, timeout=timeout, source_address=source_address)

urllib3.util.connection.create_connection = set_src_addr

import requests
r = requests.get('http://ipecho.net/plain')
print( r.text)