raise 500 error when receive the Wechat xml message

[adam777]

I running a Plone 4.3.4.1 based Zope2-2.13.22.
I used wechat simulator (https://github.com/xixilive/wecheat) and send text message to a browser view in plone instance.
the view isn't response the request.I check instance-z2.log and found the following error:
127.0.0.1 - Anonymous [26/Mar/2015:13:11:34 +0800] "POST /xsgs998/@@receive_weixin?timestamp=1427346534&nonce=suwkv7m6dz9ol3agyheyiaw5kpbfqjqe&signature=fe3322802cf60b4b228870a8a5827d42a07ce288 HTTP/1.1" 500 0 "" "Ruby".
Obviously ,the zope instance can't operate the post request that come from the wechat server.
So I set debug code in http_server.py module that located in Zope2-2.13.22/ZServer/medusa. The output of debug is in attachment.

[Colin Watson (cjwatson)]

The zope2 project on Launchpad has been archived at the request of the Zope developers (see https://answers.launchpad.net/launchpad/+question/683589 and https://answers.launchpad.net/launchpad/+question/685285). If this bug is still relevant, please refile it at https://github.com/zopefoundation/zope2.