[Zope] xmlrpc calls require string results?

[Phil Harris]

Oh good it's not just me.

I've noticed exactly this.

Phil

> -----Original Message-----
> From: zope-admin@zope.org [mailto:zope-admin@zope.org]On Behalf Of Dan
> Pierson
> Sent: 04 November 1999 22:14
> To: 'zope@zope.org'
> Subject: [Zope] xmlrpc calls require string results?
>
>
> I'm using xmlrpclib from a standalone Python script to post articles to
> Squishdot.  It seems that calls to methods that return strings work fine,
> while calls to other methods fail with tracebacks like the following:
>
> Traceback (innermost last):
>   File "./postToControlCom.py", line 77, in ?
>     postMessage(msg)
>   File "./postToControlCom.py", line 68, in postMessage
>     summary, subject, "Automation List")
>   File "./xmlrpclib.py", line 547, in __call__
>     return self.__send(self.__name, args)
>   File "./xmlrpclib.py", line 630, in __request
>     request
>   File "./xmlrpclib.py", line 582, in request
>     headers
> xmlrpclib.ProtocolError: <ProtocolError for silver.control.com/zope/: 500
> Internal Server Error>
>
> This sort of thing seems to happen no matter what the non-string
> return type
> is.  In the case above, the difference between the following code (which
> works) and the failing code is exactly the rather bogus last line: "return
> 'Done'".
> The code is in zope as an External Method (since I can't use xmlrpc to do
> the same thing from my script).
>
> def postSquishdotReply(self, title, author, body, email='', notify='',
> file='',
>                        summary='', subject='', dept='',
>                        REQUEST=None, RESPONSE=None):
>     results = self.__call__({'title':title, 'subject':subject,
> 'op':'articles'})
>     if len(results):
>         # If there are multiple Articles with the same title and subject,
>         # just use the first one.
>         article = results[0]
>         article.addPosting(title, author, body, email, notify, file,
>                            REQUEST, RESPONSE)
>     else:
>         self.addPosting(title, author, body, email, notify, file,
>                         summary, subject, dept, REQUEST, RESPONSE)
>
>     # It appears that calls via xmlrpclib throw:
>     #   xmlrpclib.ProtocolError:
>     #   <ProtocolError for silver.control.com/zope/: 500 Internal Server
> Error>
>     # if a method called by it doesn't return a string.
>     # This is bogus, but:
>     return 'Done'
>
> BTW: all of this appears to me to be true whether or not Squishdot is
> involved -- I have tested with target methods that are not part of it.
>
> What am I doing wrong here?
>
> Dan Pierson, Control Technology Corporation, <dan@control.com>
>
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