[OWSLib-users] Help with wps.execute

[Alastair Graham]

Hi Carsten
Thanks for the clarification. I will try setting up the ComplexInput format
and will give it a go. Thanks for the get request pointer too

Cheers
Alastair

| Alastair Graham |

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On Wed, 28 Aug 2019 at 13:18, Carsten Ehbrecht <ehbrecht at dkrz.de> wrote:

> Hello Alastair,
>
> I checked the describeProcess:
>
> http://localhost:8080/geoserver/wps?service=wps&version=1.0.0&request=DescribeProcess&identifier=vec:Simplify
>
>
> The process expects a ComplexInput (a url to a resource) as “features”
> input.
>
> You can also try wps “get” requests without owslib to test the process:
> http://geoprocessing.info/wpsdoc/1x0Execute
>
>
> Here an example with a ComplexInput:
>
> https://bovec.dkrz.de/ows/proxy/emu?service=WPS&version=1.0.0&request=Execute&identifier=wordcounter&DataInputs=text=@xlink:href=http://pywps.org
>
>
> Cheers,
> Carsten
>
> On 28 Aug 2019, at 12:50 pm, Alastair Graham <a.graham at geoger.co.uk>
> wrote:
>
> Hello
> I am trying to get a simple WPS call to work using the standard tools in
> Geoserver (vec:Simplify using topp:states data) and owslib. I keep coming
> up with the following error:
>
> owslib.wps.WPSException : {'code': 'NoApplicableCode', 'locator': None,
> 'text': 'Failed to retrieve value for input
> features\norg.geoserver.wps.ppio.WFSPPIO$WFS10 cannot be cast to
> org.geoserver.wps.ppio.LiteralPPIO'}
>
> I think I know what it means (a clash of formats?) but don't know how to
> resolve it. All the WMS, WFS and WPS GetCapabilities and DescribeProcess
> work fine, it's just the Execute component that is failing.
>
> Geoserver: I am using the latest container from meteofi (
> https://hub.docker.com/r/meteofi/geoserver)
> Data: I am trying to get this running on the data supplied with Geoserver
> (topp:states) before I try my own data.
>
> Code:
> from owslib.wps import WebProcessingService, monitorExecution,
> printInputOutput
>
> serverURL = 'http://localhost:8080/geoserver/wps'
>
> wps = WebProcessingService(serverURL, verbose=False, skip_caps=True)
> processid = 'vec:Simplify'
> inputs = [('features','topp:states'),
>             ('distance', '10'),
>             ('preserveTopology', 'True')]
>
> execution = wps.execute(processid, inputs)
> if execution.isSucceded:
>     output, = execution.processOutputs
>     print(output.data)
>
> I can get this to work using the Geoserver WPS request builder, and using
> an XML file through Curl, so I guess the issue is with my Python.
> Any pointers on what I need to do to handle this issue would be really
> appreciated
>
> Thanks
> Alastair
>
>
> | Alastair Graham
>
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