On Thu, Sep 9, 2010 at 2:33 PM, <exarkun@twistedmatrix.com> wrote:

On 09:42 am, petshmidt@googlemail.com wrote:

...

Hello,

if an error occurs in HTTP11ClientProtocol request method (twisted.web._newclient) then error is stored in RequestGenerationFailed Exception and wrapped in Failure object:

       def ebRequestWriting(err):            if self._state == 'TRANSMITTING':                self._state = 'GENERATION_FAILED'                self.transport.loseConnection()                 self._finishedRequest.errback(                    Failure(RequestGenerationFailed([err])))            else:                log.err(err, "foo")

but if I print detailed traceback of failure in my code it doesn't show all information it contains

Original Failure (err in function above): [Failure instance: Traceback: <type 'exceptions.TypeError'>: Data must not be unicode

This is detailed traceback, where I don't see the message "Data must not be unicode"

*--- Failure #7 (pickled) --- Failure: twisted.web._newclient.RequestGenerationFailed: [<twisted.python.failure.Failure <type 'exceptions.TypeError'>>] *--- End of Failure #7 --- None

Is there a way to get original error message and where it was raised in Twisted code?

See the (documented) `reasons` attribute of `RequestGenerationFailed`.

Thanks for hint! RequestGenerationFailed save errors in `reasons` attribute, but documentation doesn't tell how to print reasons. I'm getting just failure object in my errback.

Jean-Paul

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On Thu, Sep 9, 2010 at 2:33 PM, <exarkun@twistedmatrix.com> wrote:

On 09:42 am, petshmidt@googlemail.com wrote:

...

Hello,

if an error occurs in HTTP11ClientProtocol request method (twisted.web._newclient) then error is stored in RequestGenerationFailed Exception and wrapped in Failure object:

       def ebRequestWriting(err):            if self._state == 'TRANSMITTING':                self._state = 'GENERATION_FAILED'                self.transport.loseConnection()                 self._finishedRequest.errback(                    Failure(RequestGenerationFailed([err])))            else:                log.err(err, "foo")

but if I print detailed traceback of failure in my code it doesn't show all information it contains

Original Failure (err in function above): [Failure instance: Traceback: <type 'exceptions.TypeError'>: Data must not be unicode

This is detailed traceback, where I don't see the message "Data must not be unicode"

*--- Failure #7 (pickled) --- Failure: twisted.web._newclient.RequestGenerationFailed: [<twisted.python.failure.Failure <type 'exceptions.TypeError'>>] *--- End of Failure #7 --- None

Is there a way to get original error message and where it was raised in Twisted code?

See the (documented) `reasons` attribute of `RequestGenerationFailed`.

Thanks for hint! RequestGenerationFailed save errors in `reasons` attribute, but documentation doesn't tell how to print reasons. I'm getting just failure object in my errback.

Jean-Paul

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