Cherrypy Errors?

[mic...@yanovich.net]

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I just recently noticed this error:

ERROR:cherrypy.error:[17/Apr/2014:18:13:18] ENGINE TypeError("argument of type 'NoneType' is not iterable",)
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/cherrypy/wsgiserver/wsgiserver2.py", line 1292, in communicate
req.parse_request()
File "/usr/lib/python2.7/dist-packages/cherrypy/wsgiserver/wsgiserver2.py", line 580, in parse_request
success = self.read_request_line()
File "/usr/lib/python2.7/dist-packages/cherrypy/wsgiserver/wsgiserver2.py", line 644, in read_request_line
if NUMBER_SIGN in path:
TypeError: argument of type 'NoneType' is not iterable



Seems to happen once in a while. I'm not sure which queries are causing this to happen, nor of a way to reproduce it.

Just thought I'd put this out there.

- --
Michael Yanovich

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[Dave Schaefer]

>TypeError: argument of type 'NoneType' is not iterable

Hey Michael, thanks for the report. I have not seen this in any of the
logs for heimdal. So nice find ;) I don't see any reports in the
cherrypy mailing list either. Any idea what site you might have been
querying around that time? What version of cherrypy are you running?

From the error message it looks like python is complaining about being
asked to work with the 'path' variable when path is None. e.g. we may
want something like this: instead of

if NUMBER_SIGN in path:

we could have

if path and NUMBER_SIGN in path:


Farther down in that function there is a line that says

if QUESTION_MARK in path:

That will probaby fail in the same way.

Looking at cherrypy's code, it appears 'path' can certainly become
None from some calls to parse_request_uri() - there is a case where
the function returns (None, uri, None), which would set the path to
None and presumably trigger this bug. However, I was unable to trigger
that case with a few minutes of trying. I think we'd need someone who
knows more about cherrypy, what cherrypy 'authority' URLs are, and how
they work.

Are you interested in pinging the cherrypy list?

If you know what kind of URL your notary might have been fed that
would be very useful. From looking at parse_request_uri() it looks
like:

- it cannot be '*'
- it cannot have both '://' and a question mark
- it cannot start with '/'

Most notary URLs I've seen start with / or have a ?, so I would be
interested to see what happened here.


Summary: looks like a cherrypy bug. I'm not sure what the correct fix is.

Thanks for the report!

[Chris Hills]

Did this get resolved? I recently installed perspectives server and I am running into the same issue:-

$ tail logs/webserver.log

ERROR:cherrypy.error:[11/Jul/2015:13:01:42] ENGINE TypeError("argument of type 'NoneType' is not iterable",)

Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/cherrypy/wsgiserver/wsgiserver2.py", line 1292, in communicate

    req.parse_request()

  File "/usr/lib/python2.7/site-packages/cherrypy/wsgiserver/wsgiserver2.py", line 580, in parse_request

    success = self.read_request_line()

  File "/usr/lib/python2.7/site-packages/cherrypy/wsgiserver/wsgiserver2.py", line 644, in read_request_line

    if NUMBER_SIGN in path:

TypeError: argument of type 'NoneType' is not iterable

$ rpm -q --whatprovides "/usr/lib/python2.7/site-packages/cherrypy/wsgiserver/wsgiserver2.py"

python-cherrypy-3.2.2-4.el7.noarch

My server is running at http://notary1.chaz6.com:8080/

[Dave Schaefer]

Hey Chris, thanks for reporting this. Do you happen to know the site
or URL that causes this to happen? That would be very useful.

[Chris Hills]

I'm sorry I don't know what site is causing it. Can you suggest how to find out? I just had a look in the log and it's showing a different error:-

ERROR:cherrypy.error.44152656:[13/Jul/2015:13:24:53] HTTP Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/cherrypy/_cprequest.py", line 656, in respond

    response.body = self.handler()

  File "/usr/lib/python2.7/site-packages/cherrypy/lib/encoding.py", line 188, in __call__

    self.body = self.oldhandler(*args, **kwargs)

  File "/usr/lib/python2.7/site-packages/cherrypy/_cpdispatch.py", line 34, in __call__

    return self.callable(*self.args, **self.kwargs)

  File "/usr/lib/python2.7/site-packages/cherrypy/_cptools.py", line 168, in handle_func

    handled = self.callable(*args, **self._merged_args(kwargs))

TypeError: staticfile() got multiple values for keyword argument 'filename'