Proxy Authentication Error in Urllib2 (Python 2.7)

Question

[Windows 7 64 bit; Python 2.7]

If I try to use Urllib2, I get this error

Traceback (most recent call last): File "C:\Users\cYanide\Documents\Python Challenge\1\1.py", line 7, in <module> response = urllib2.urlopen('http://python.org/') File "C:\Python27\lib\urllib2.py", line 126, in urlopen return _opener.open(url, data, timeout) File "C:\Python27\lib\urllib2.py", line 400, in open response = meth(req, response) File "C:\Python27\lib\urllib2.py", line 513, in http_response 'http', request, response, code, msg, hdrs) File "C:\Python27\lib\urllib2.py", line 438, in error return self._call_chain(*args) File "C:\Python27\lib\urllib2.py", line 372, in _call_chain result = func(*args) File "C:\Python27\lib\urllib2.py", line 521, in http_error_default raise HTTPError(req.get_full_url(), code, msg, hdrs, fp) **urllib2.HTTPError: HTTP Error 407: Proxy Authentication Required** 

Now I am behind a college proxy that requires authentication, so that is probably the reason this is happening. But shouldn't Urllib2 output authentication and proxy information from system settings?

I understand that there is some additional code that I can insert into my program to have “hardcode” proxy information in the program, but I really do not want to do this if this is not the last resort. This will prevent portability of the program on computers with different authentication identifiers and college passwords.

Answer 1

Your program should see the environment variables that are installed on Windows. So these are the two environment variables in your Windows.

HTTP_PROXY = http://username: [e-mail]

HTTPS_PROXY = https://username: [e-mail]

And continue to execute the script. He must pick up the corresponding authenticators and continue the connection.