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Author Stephen Balousek
Recipients Stephen Balousek
Date 2020-02-03.23:31:28
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <>
When making an HTTP request using an opener with an attached HTTPDigestAuthHandler, the request causes a crash when the returned 'WWW-Authenticate' header for the 'Digest' domain does not return the optional 'qop' value.

Response headers:
Content-Type: application/json
Content-Security-Policy: default-src 'self' 'unsafe-eval' 'unsafe-inline';img-src 'self' data:
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Content-Length: 600
WWW-Authenticate: Digest realm="ServiceManager", nonce="1580815098100956"
WWW-Authenticate: Basic realm="ServiceManager", charset="UTF-8"
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Expires: 0
Pragma: no-cache

Error:   Exception: 'NoneType' object has no attribute 'split'
Traceback (most recent call last):
  File "/home/sbalousek/bin/", line 1317, in RunTest
    status, payload, contentType = ExecuteRequest(baseUrl, test, tap);
  File "/home/sbalousek/bin/", line 1398, in ExecuteRequest
    response    =, payload, timeout);
  File "/usr/lib/python3.8/urllib/", line 523, in open
    response = meth(req, response)
  File "/home/sbalousek/bin/", line 1065, in http_response
    return self.process_response(request, response, HTTPErrorProcessor.http_response);
  File "/home/sbalousek/bin/", line 1056, in process_response
    return handler(self, request, response);
  File "/usr/lib/python3.8/urllib/", line 632, in http_response
    response = self.parent.error(
  File "/usr/lib/python3.8/urllib/", line 555, in error
    result = self._call_chain(*args)
  File "/usr/lib/python3.8/urllib/", line 494, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.8/urllib/", line 1203, in http_error_401
    retry = self.http_error_auth_reqed('www-authenticate',
  File "/usr/lib/python3.8/urllib/", line 1082, in http_error_auth_reqed
    return self.retry_http_digest_auth(req, authreq)
  File "/usr/lib/python3.8/urllib/", line 1090, in retry_http_digest_auth
    auth = self.get_authorization(req, chal)
  File "/usr/lib/python3.8/urllib/", line 1143, in get_authorization
    if 'auth' in qop.split(','):
AttributeError: 'NoneType' object has no attribute 'split'

The crash is a result of an optional 'qop' value missing from the 'WWW-Authenticate' header.

This bug was introduced in changes for issue 38686.
Date User Action Args
2020-02-03 23:31:29Stephen Balouseksetrecipients: + Stephen Balousek
2020-02-03 23:31:29Stephen Balouseksetmessageid: <>
2020-02-03 23:31:29Stephen Balouseklinkissue39548 messages
2020-02-03 23:31:28Stephen Balousekcreate