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

从 Lib/urllib/parse.py 中 issue 所链接的 URL 分割代码开始，复现对 http://user:p?assword@server:port 的解析。确认代理凭据中问号的预期处理方式，然后验证该示例不再将密码的一部分视为单独的 URL 组件。