/_ah/bounce

[johnP]

24 hours ago started getting constant errors - it's not even hitting my code...

'str' object has no attribute 'get_payload'
Traceback (most recent call last):
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1535, in __call__
    rv = self.handle_exception(request, response, e)
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1529, in __call__
    rv = self.router.dispatch(request, response)
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher
    return route.handler_adapter(request, response)
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1102, in __call__
    return handler.dispatch()
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 572, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 570, in dispatch
    return method(*args, **kwargs)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/webapp/mail_handlers.py", line 114, in post
    self.receive(BounceNotification(self.request.POST))
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/webapp/mail_handlers.py", line 168, in __init__
    post_vars.get('raw-message', ''))
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/mail.py", line 939, in __init__
    self.update_from_mime_message(mime_message)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/mail.py", line 1513, in update_from_mime_message
    super(InboundEmailMessage, self).update_from_mime_message(mime_message)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/mail.py", line 1422, in update_from_mime_message
    super(EmailMessage, self).update_from_mime_message(mime_message)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/mail.py", line 1295, in update_from_mime_message
    self._update_payload(mime_message)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/mail.py", line 1228, in _update_payload
    self._update_payload(alternative)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/mail.py", line 1223, in _update_payload
    payload = mime_message.get_payload()
AttributeError: 'str' object has no attribute 'get_payload'

[Nicholas (Google Cloud Support)]

This is indeed an odd error message that seems to be emanating from the Mail API when attempting to sent bounce notifications to the /_ah/bounce endpoint of your application.  If you believe this to be an issue with the platform, I'd recommend filing a new issue on the App Engine public issue tracker.  Be sure to include the following in your report:

• The minimal code from your application required to reproduce this error, most importantly the code using the Mail API and the code handling requests to the /_ah/bounce endpoint
  
• A timeline of when this issue began and/or ended
  
• Any other relevant logs you think may be related
  

If/when filing a public issue, feel free to link to it here so that others that may also be encountering this can follow through and support the report.  Thanks for your patience.

[johnP]

Posted issue.  https://code.google.com/p/googleappengine/issues/detail?id=13512

[Attila-Mihaly Balazs]

@johnP: did you make the issue private intentionally?

Thanks,
Attila

[Nicholas (Google Cloud Support)]

I made the issue private as it contained a fair amount of project-sensitive information.  Nevertheless, I've created a generalized and publicly available reproduction of the issue which includes a usable workaround provided by another contributor on the reported issue.  Once this issue is properly triaged, I will sanitize its contents of sensitive information and make it public again.

[Jason Myers]

We've noticed this issue too.  I also noticed that the bounce messages are now coming in as `quoted-printable` encoded (notice for example the mime boundaries are `; boundary=3DXXXXX`).  This must have changed recently.

If you have access to the payload before it is passed through to BounceNotification, you can decoding the incoming payload raw-message as `quoted-printable` to temporarily fix the issue

This has happened in the past with blobstore POSTs (that started using `quoted-printable`), see https://code.google.com/p/googleappengine/issues/detail?id=10109

On Wednesday, January 18, 2017 at 5:13:00 PM UTC-5, johnP wrote: