[OWSLib-users] connection refused when searching a specific metadata

[Tom Kralidis]

Hi Ernest:


> On Apr 29, 2016, at 09:41, Chiarello Ernest <Ernest.Chiarello at univ-fcomte.fr> wrote:
> 
> Hello Tom,
> 
> pleased to meet you  !
> 
> Le 29/04/2016 14:17, Tom Kralidis a écrit :
>> Hi Ernest:
>> 
>> On Fri, Apr 29, 2016 at 5:49 AM, Ernest Chiarello
>> <ernest.chiarello at univ-fcomte.fr> wrote:
>>> Hello,
>>> 
>>> i am new in this list and in Python, so it is possible that i ask naive
>>> issues...
>>> i am looking for a specific metadata in geonetwork, according to owslib
>>> documentation.
>>> 
>>> it works well with Chrome and Firefox, using this url:
>>> http://geonetwork-mshe.univ-fcomte.fr:8080/geonetwork/srv/fre/catalog.search#/metadata/8174d16d-240f-4199-9c2f-af6976e376b3
>>> 
>>> but i fails with owslib. :'(
>>> 
>>>>>> geonetwork =
>>>>>> 'http://geonetwork-mshe.univ-fcomte.fr:8080/geonetwork/srv/fre/csw'
>>>>>> csw = CatalogueServiceWeb(geonetwork)
>>>>>> csw.getrecordbyid(id=['8174d16d-240f-4199-9c2f-af6976e376b3'])
>>> Traceback (most recent call last):
>>>   File "<stdin>", line 1, in <module>
>>>   File "/usr/lib/python2.7/dist-packages/owslib/csw.py", line 293, in
>>> getrecordbyid
>>>     self._invoke()
>>>   File "/usr/lib/python2.7/dist-packages/owslib/csw.py", line 647, in
>>> _invoke
>>>     self.response = openURL(self.request, None, 'Get',
>>> username=self.username, password=self.password, timeout=self.timeout).read()
>>>   File "/usr/lib/python2.7/dist-packages/owslib/util.py", line 186, in
>>> openURL
>>>     **rkwargs)
>>>   File "/usr/lib/python2.7/dist-packages/requests/api.py", line 53, in
>>> request
>>>     return session.request(method=method, url=url, **kwargs)
>>>   File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 468, in
>>> request
>>>     resp = self.send(prep, **send_kwargs)
>>>   File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 576, in
>>> send
>>>     r = adapter.send(request, **kwargs)
>>>   File "/usr/lib/python2.7/dist-packages/requests/adapters.py", line 437, in
>>> send
>>>     raise ConnectionError(e, request=request)
>>> requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost',
>>> port=8080): Max retries exceeded with url:
>>> /geonetwork/srv/fre/csw?outputFormat=application%2Fxml&service=CSW&outputSchema=http%3A%2F%2Fwww.opengis.net%2Fcat%2Fcsw%2F2.0.2&request=GetRecordById&version=2.0.2&elementsetname=full&id=8174d16d-240f-4199-9c2f-af6976e376b3
>>> (Caused by
>>> NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection
>>> object at 0x7fd4f8050fd0>: Failed to establish a new connection: [Errno 111]
>>> Connection refused',))
>>> 
>>> any idea ?
>> I'm guessing the CSW you are querying has 'http://localhost:8080' set as it's
>> host in the CSW configuration.  OWSLib's CSW support does a GetCapabilities
>> request by default to get this information.  You can use the skip_caps=True
>> parameter to bypass this:
>> 
>> csw = CatalogueServiceWeb(geonetwork, skip_caps=True)
> 
> you are right, with this option, the request is successful.
> 
> >>> geonetwork = 'http://geonetwork-mshe.univ-fcomte.fr:8080/geonetwork/srv/fre/csw'
> >>> from owslib.csw import CatalogueServiceWeb
> >>> csw = CatalogueServiceWeb(geonetwork, skip_caps=True)
> >>> csw.getrecordbyid(id=['8174d16d-240f-4199-9c2f-af6976e376b3'])
> >>>
> >>> for rec in csw.records:
> ...     print csw.records[rec].title
> ...
> Localities in Victoria (VMADMIN.LOCALITY_POLYGON) - Comprehensive Elements
> 
> it works also on our geOrchestra instance ! :-)
> 
> >>> geonetwork = 'https://georchestra-mshe.univ-fcomte.fr/geonetwork/srv/fre/csw'
> >>>
> >>>
> >>> georchestra = 'https://georchestra-mshe.univ-fcomte.fr/geonetwork/srv/fre/csw'
> >>> from owslib.csw import CatalogueServiceWeb
> >>> csw = CatalogueServiceWeb(georchestra, skip_caps=True)
> >>> csw.getrecordbyid(id=['7253afc776baa4ed602def02e4ef04d15ef5ebd3'])
> >>> for rec in csw.records:
> ...     print csw.records[rec].title
> ...
> voirie__voirie_pcn
> 
> 
>> 
>> which means OWSLib will always use the URL you specify when initializing
>> the CSW.  This is not always guaranteed to work as some CSW implementations
>> have URLs which differ depending on the operation.
> 
> do you mean that it is possible to change that in geonetwork/csw configuration ?
> 

Exactly, yes. 


>> Having said this, the CSW itself should update its configuration accordingly
>> to prevent this issue from manifesting itself for downstream
>> clients/applications.
>> 
>> Hope this helps.
> Thanks a lot.
> 
> Ernest.
>> 
>> ..Tom
>> 
>>> Thanks in advance.
>>> 
>>> Ernest.
> 
> 
> -- 
> Ernest CHIARELLO  -  Ernest.Chiarello at univ-fcomte.fr
> UMR6049 ThéMA - Théoriser et Modéliser pour Aménager
> CNRS / université de Bourgogne Franche-Comté
> 32 rue Mégevand 25030 BESANÇON Cedex
> 
> Tel : 03 81 66 54 80           Mob : 07 82 99 11 08
> 
>