exceptions.AttributeError: 'NoneType' object has no attribute 'strip'

Hi Folks, I´m trying to run the Autobahn test suite in “fuzzingclient” mode against a custom websocket server to discover connection and compatibility issues in the custom websocket implementation. The http traffic runs over two proxy servers (Traefik, Nginx).
I execute the test suite with the following command line: wstest -d -m fuzzingclient -o report.html | tee output.txt The problem is that the test never finishes. However, the following exception is dumped to the console:

Traceback (most recent call last):
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/autobahntestsuite/wstest.py", line 346, in run
            start(options, spec)
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/autobahntestsuite/wstest.py", line 280, in start
            reactor.run()
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/twisted/internet/base.py", line 1243, in run
            self.mainLoop()
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/twisted/internet/base.py", line 1252, in mainLoop
            self.runUntilCurrent()
        --- <exception caught here> ---
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/twisted/internet/base.py", line 878, in runUntilCurrent
            call.func(*call.args, **call.kw)
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/twisted/internet/tcp.py", line 479, in connectionLost
            self.connector.connectionLost(reason)
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/twisted/internet/base.py", line 1136, in connectionLost
            self.factory.clientConnectionLost(self, reason)
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/twisted/protocols/policies.py", line 167, in clientConnectionLost
            self.wrappedFactory.clientConnectionLost(connector, reason)
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/autobahntestsuite/fuzzing.py", line 1292, in clientConnectionLost
            self.createReports()
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/autobahntestsuite/fuzzing.py", line 469, in createReports
            self.createMasterReportHTML(self.outdir)
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/autobahntestsuite/fuzzing.py", line 670, in createMasterReportHTML
            agent_case_report_file = self.makeAgentCaseReportFilename(agentId, caseId, ext = 'html')
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/autobahntestsuite/fuzzing.py", line 498, in makeAgentCaseReportFilename
            return self.cleanForFilename(agentId) + "_case_" + c + "." + ext
          File "/home/cluick/wstest/local/lib/python2.7/site-packages/autobahntestsuite/fuzzing.py", line 487, in cleanForFilename
            s0 = ''.join([c if c in "abcdefghjiklmnopqrstuvwxyz0123456789" else " " for c in str.strip().lower()])
        exceptions.AttributeError: 'NoneType' object has no attribute 'strip'

The complete test directory including the console output can be found in the following ZIP file: wstest.zip

I´m using wstest version 17.5.0.

Can you please tell me what is going wrong here?

Thank you & best regards, Christof Luick.

[jsthomas]

I’m hitting this same error, both when I try to run locally on Ubuntu 16.04 or using the crossbar-docker/autobahn-testsuite container. My versions are the same:

Autobahn 0.10.9
AutobahnTestSuite 0.7.6

[jamillosantos]

Well, as I told you, I am not an expert.

I know that Autobahn uses the user agent information on the header of the report table and It was what was crashing the autobahn in my specific case.