python - Force requests to use IPv4 / IPv6

Question

How to force the requests library to use a specific internet protocol version for a get request? Or can this be achieved better with another method in Python? I could but I do not want to use curl…

Example to clarify purpose:

import requests
r = requests.get('https://my-dyn-dns-service.domain/?hostname=my.domain',
                 auth = ('myUserName', 'my-password'))

Answer 1

I've found a minimalistic solution to force urrlib3 to use either ipv4 or ipv6. This method is used by urrlib3 for creating new connection both for Http and Https. You can specify in it any AF_FAMILY you want to use.

import socket
import requests.packages.urllib3.util.connection as urllib3_cn


  def allowed_gai_family():
    """
     https://github.com/shazow/urllib3/blob/master/urllib3/util/connection.py
    """
    family = socket.AF_INET
    if urllib3_cn.HAS_IPV6:
        family = socket.AF_INET6 # force ipv6 only if it is available
    return family

urllib3_cn.allowed_gai_family = allowed_gai_family