Question

I am trying to connect to a REST resource and retrieve the data using Python script (Python 3.2.3). When I run the script I am getting error as HTTP Error 401: Unauthorized. Please note that I am able to access the given REST resource using REST client using Basic Authentication. In the REST Client I have specified the hostname, user and password details (realm is not required).
Below is the code and complete error. Your help is very much appreciated.

Code:

import urllib.request

# set up authentication info
auth_handler = urllib.request.HTTPBasicAuthHandler()
auth_handler.add_password(realm=None,
                       uri=r'http://hostname/',
                       user='administrator',
                       passwd='administrator')
opener =  urllib.request.build_opener(auth_handler)
urllib.request.install_opener(opener)
res = opener.open(r'http://hostname:9004/apollo-api/nodes')
nodes = res.read()

Error

Traceback (most recent call last):
File "C:\Python32\scripts\get-nodes.py", line 12, in <module>
    res = opener.open(r'http://tolowa.wysdm.lab.emc.com:9004/apollo-api/nodes')
File "C:\Python32\lib\urllib\request.py", line 375, in open
   response = meth(req, response)
File "C:\Python32\lib\urllib\request.py", line 487, in http_response
   'http', request, response, code, msg, hdrs)
File "C:\Python32\lib\urllib\request.py", line 413, in error
   return self._call_chain(*args)
File "C:\Python32\lib\urllib\request.py", line 347, in _call_chain
   result = func(*args)
File "C:\Python32\lib\urllib\request.py", line 495, in http_error_default
   raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 401: Unauthorized

Answer 1

Try to give the correct realm name. You can find this out for example when opening the page in a browser – the password prompt should display the name.