OpenXcap exception: TypeError in twisted.web2.stream.IByteStream

[gregorio]

Hi all. I already posted this in openSer mailing list but nobody could help me.

I get an exception in openXcap when I send a GET to retrieve the resources file.

I explain the process I followed:

---

<----Receive 404, because there is not file.

---

Body;

<?xml version='1.0' encoding='UTF-8'?>

<resource-lists xmlns='urn:ietf:params:xml:ns:resource-lists' xmlns:cp='urn:ietf:params:xml:ns:copycontrol'>

<list></list>

</resource-lists>

<----Receive 200 OK. So openXcap likes my document.

---

<---- Receive 500 “An error occurred rendering the requested page. More information is available in the server log”. So the same document that was accepted in the PUT throws an exception.

The server log says:

Oct 30 15:01:55 localhost openxcap[2791]: [-] Exception rendering:

Oct 30 15:01:55 localhost openxcap[2791]: [-] Traceback (most recent call last):

Oct 30 15:01:55 localhost openxcap[2791]: [-] File "/usr/lib/python2.4/site-packages/twisted/internet/posixbase.py", line 228, in mainLoop

Oct 30 15:01:55 localhost openxcap[2791]: [-] self.runUntilCurrent()

Oct 30 15:01:55 localhost openxcap[2791]: [-] File "/usr/lib/python2.4/site-packages/twisted/internet/base.py", line 533, in runUntilCurrent

Oct 30 15:01:55 localhost openxcap[2791]: [-] f(*a, **kw)

Oct 30 15:01:55 localhost openxcap[2791]: [-] File "/usr/lib/python2.4/site-packages/twisted/internet/defer.py", line 239, in callback

Oct 30 15:01:55 localhost openxcap[2791]: [-] self._startRunCallbacks(result)

Oct 30 15:01:55 localhost openxcap[2791]: [-] File "/usr/lib/python2.4/site-packages/twisted/internet/defer.py", line 304, in _startRunCallbacks

Oct 30 15:01:55 localhost openxcap[2791]: [-] self._runCallbacks()

Oct 30 15:01:55 localhost openxcap[2791]: [-] --- <exception caught here> ---

Oct 30 15:01:55 localhost openxcap[2791]: [-] File "/usr/lib/python2.4/site-packages/twisted/internet/defer.py", line 317, in _runCallbacks

Oct 30 15:01:55 localhost openxcap[2791]: [-] self.result = callback(self.result, *args, **kw)

Oct 30 15:01:55 localhost openxcap[2791]: [-] File "/usr/lib/python2.4/site-packages/xcap/resource.py", line 51, in sendResponse

Oct 30 15:01:55 localhost openxcap[2791]: [-] response = http.Response(response.code, stream=response.data)

Oct 30 15:01:55 localhost openxcap[2791]: [-] File "/usr/lib/python2.4/site-packages/twisted/web2/http.py", line 109, in init

Oct 30 15:01:55 localhost openxcap[2791]: [-] self.stream = IByteStream(stream)

Oct 30 15:01:55 localhost openxcap[2791]: [-] exceptions.TypeError: ('Could not adapt', array('c', "<?xml version='1.0' encoding='UTF-8'?><resource-lists xmlns='urn:ietf:params:xml:ns:resource-lists' xmlns:cp='urn:ietf:params:xml:ns:copycontrol'><list></list></resource-lists>"), <InterfaceClass twisted.web2.stream.IByteStream>)

Anyone know what is wrong?

Thanks and best regards.

Gregorio

[ruud]

Hi Gregorio,

Could you please tell me what version of the python MySQLdb module you are using?

[gregorio]

Hi.

I think the version is MySQL-python-1.2.1. I did "rpm -qa|grep python", is it right?

Regards.

[ruud]

Please upgrade to version 1.2.2 of MySQL-python. From the 1.2.2 changelog:

"BLOB columns are now returned as Python strings instead of byte arrays."

[diego]

Hi,

I have the same error as Gregorio, and when I try to upgrade to version 1.2.2 of MySQL-python, it requires Python 2.5. I have Python 2.4 installed (as appears in the openXCAP requirements), so I tried to install the rpm (1.2.2) without dependencies, but it seems not to work. Is it possible to copy into the CentOS only the libraries needed for the current problem?

Regards

[ruud]

Python 2.5 does not seem to be a requirement for MySQL-python 1.2.2. Indeed we have tested it with Python 2.4 and MySQL-python 1.2.2 on debian, which is the distribution we recommend for OpenXCAP.

If this does not work in your distribution you may have to install it manually for Python 2.4.