Python requests API using proxy for https request get 407 Proxy Authentication Required

Question

I've been struggling with my company proxy to make an https request.

import requests
from requests.auth import HTTPProxyAuth

proxy_string = 'http://user:password@url_proxt:port_proxy'

s = requests.Session()
s.proxies = {"http": proxy_string , "https": proxy_string}
s.auth = HTTPProxyAuth(user,password)

r = s.get('http://www.google.com') # OK
print(r.text)
r = s.get('https://www.google.com',proxies={"http": proxy_string , "https": proxy_string}) #OK
print(r.text)
r = s.get('https://www.google.com') # KO
print(r.text)

When KO, I have the following exception :

HTTPSConnectionPool(host='www.google.com', port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 407 Proxy Authentication Required',)))

I looked online but didn't find someone having this specific issue with HTTPS.

Thank you for your time

Jack Moody · Accepted Answer · 2021-05-19 05:30:03Z

9

Thanks to the amazing help of Lukasa, I solved my issue.

Please see discussion on fix here or set :

session.trust_env=False

edited May 19, 2021 at 5:30

Jack Moody

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answered Dec 2, 2015 at 21:42

Fabrice E.

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1 Comment

Yahya Over a year ago

Did not work for me !

Somit · Accepted Answer · 2017-05-25 17:16:16Z

1

I personally solved the above problem on my system by updating the environment variables http_proxy,https_proxy,socks_proxy,ftp_proxy.

First enter the command on your terminal : printenv

This should show you the environment variables on your system.

In my case intially: http_proxy=http://proxyserver:port/

I changed it to : http_proxy=http://username:password@proxy:port/

using the command export http_proxy="http://username:password@proxy:port/"

Similarly for https_proxy,socks_proxy,ftp_proxy

answered May 25, 2017 at 17:16

Somit

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Vinay · Accepted Answer · 2018-02-16 10:57:44Z

1

Other way i have resolved is - speak with your corporate IT administrator and find a direct proxy port which connects to external domain (with / without password)

pip install --proxy=http://proxyhost:proxy_port pixiedust

Found from other colleagues using the proxy (proxy_port direct connection) in their eclipse settings (network)

answered Feb 16, 2018 at 10:57

Vinay

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Daniel Miranda · Accepted Answer · 2021-08-25 12:45:45Z

1

To anyone else that tried the accepted answer's "session.trust_env=False" with no success, there may be a deeper issue that produces a similar error (which is probably not the issue the OP had): There may be a corporate proxy configuration that requires specific headers to be sent upon CONNECT, and python requests doesn't send them ('User-Agent' and 'Host', for example).

I do not have a solution for that at the moment. See https://github.com/psf/requests/issues/5028 for a discussion on the subject.

answered Aug 25, 2021 at 12:45

Daniel Miranda

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