URL Parse Split incorreclty interpret proxy pw, which include '?'

Hi,

I have exported the env var for http proxy, where the Username and password is included in the URL.
The password of the user includes an '?', which is the reason, why the URL string is not correctly processed.

The URL
http_proxy='http://<username>:<pass_with_?>@<server>:<port>'

When the method splits:
https://github.com/python/cpython/blob/53d9cd95cd91f1a291a3923acb95e0e86942291a/Lib/urllib/parse.py#L477

It splits at the ? of the password.

Therefore resulting into

 File "/usr/lib/python3/dist-packages/httplib2/__init__.py", line 950, in proxy_info_from_url
    port = int(port)
ValueError: invalid literal for int() with base 10: 'p'

if the URL would be:

http://user:p?assword@server:port

Regards
Nam

Iniziate in Lib/urllib/parse.py, nel codice di suddivisione degli URL collegato nell’issue, e riproducete il parsing di http://user:p?assword@server:port. Confermate la gestione prevista per un punto interrogativo nelle credenziali del proxy, quindi verificate che l’esempio non tratti più parte della password come un componente separato dell’URL.