Addictive point when going through http proxy with basic authentication in python

2.7.x series. When basic authentication is applied when going through http proxy with urllib2.

When the target server is authenticated

client => proxy => target
↑ Here

This is okay if you imitate the reference or the one that comes out when you google normally.

#!/usr/bin/env python

import urllib2

proxy = urllib2.ProxyHandler({
  'http': 'http://username:password@proxy:8080'
})
auth = urllib2.HTTPBasicAuthHandler()
opener = urllib2.build_opener(proxy, auth)
urllib2.install_opener(opener)

conn = urllib2.urlopen('http://target/')
print conn.read()

This will give you the Proxy-Authorization header.

When basic authentication is applied to the proxy server

client => proxy => target
↑ Here

In this case, you must add the ʻAuthorization header instead of the Proxy-Authorization` header. However, no matter how much I searched and tried, the method using Handler did not come out, so It can't be helped, so I managed to solve it by calculating the header by hand and adding it.

#!/usr/bin/env python

import urllib2
import base64

proxy = urllib2.ProxyHandler({
  'http':'http://proxy:8080'
})
opener = urllib2.build_opener(proxy)
base64string = base64.encodestring('%s:%s' % ("username", "password"))
opener.addheaders = [ ("Authorization", "Basic %s" % base64string) ]

conn = opener.open('http://target/')
print conn.read()

I wonder if there is a proper solution using Handler.

By the way

pip requests When used It was the behavior of Proxy-Authorization.

#!/usr/bin/env python

import requests

proxies = {
    "http": "http://username:password@proxy:8080",
}

ret = requests.get("http://target/", proxies=proxies)
print ret