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/trunk/qpid/python/qpid/messaging/driver.py
<https://reviews.apache.org/r/21765/#comment77891>

    I think the distinction between null and a zero length string is important. 
So it may be the saslwrapper (or interface to that) that needs to be changed to 
return null where appropriate and a zero length string where appropriate.


- Gordon Sim


On May 21, 2014, 11:45 a.m., Pavel Moravec wrote:
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> https://reviews.apache.org/r/21765/
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> (Updated May 21, 2014, 11:45 a.m.)
> 
> 
> Review request for qpid, Gordon Sim and Rafael Schloming.
> 
> 
> Bugs: QPID-5778
>     https://issues.apache.org/jira/browse/QPID-5778
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> 
> Repository: qpid
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> 
> Description
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> 
> CRAM-MD5 requires an empty response string to be treated as null in 
> sasl_client_start - the patch handles this right. But I dont want to 
> introduce a regression like https://issues.apache.org/jira/browse/QPID-3522 
> where this kind of fix broker EXTERNAL mechanism that interprets zero string 
> as a string and not null.
> 
> I have no experience with EXTERNAL / SSL in Python client hence raising 
> review request.
> 
> 
> Diffs
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>   /trunk/qpid/python/qpid/messaging/driver.py 1596542 
> 
> Diff: https://reviews.apache.org/r/21765/diff/
> 
> 
> Testing
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> 
> CRAM-MD5 now works, haven't tested EXTERNAL.
> 
> 
> Thanks,
> 
> Pavel Moravec
> 
>

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