[Pywps-dev] pywps - json output

[Tom Kralidis]

Another option is to extend PyWPS to support an 'outputformat'
parameter like 'application/json' which would simply transform the XML
response into JSON.  Or to be closer to the WPS spec allow one to
define/send process input which allows takes over the entire response
into JSON.

Having said this, we do this for pycsw as very simple step just before
the response is sent.  Examples:

Example response:
https://github.com/geopython/pycsw/blob/master/tests/expected/suites_default_post_GetRecordById-json.xml
Code: https://github.com/geopython/pycsw/blob/master/pycsw/core/formats/fmt_json.py#L35

Thoughts? Feel free to open a ticket if something like this would be useful.

..Tom



On Sun, Oct 23, 2016 at 6:14 PM, Sylvain Beorchia
<sylvain.beorchia at gmail.com> wrote:
> Thank you for your answers.
>
> Jachym, i knew that WPS is XML a  based communication protocol, but i was
> hoping for a full  JSON output.
> I'm going to have a look at the rawdataoutput Jonas suggered.
>
> Thank you.
>
> Sylvain.
>
> 2016-10-23 22:26 GMT+02:00 Jachym Cepicky <jachym.cepicky at gmail.com>:
>>
>> Ah, yes, I almost forget about it
>>
>>
>>
>> ne 23. 10. 2016 v 22:10 odesílatel Jonas Eberle <jonas.eberle at gmx.de>
>> napsal:
>>>
>>> Hi Sylvain,
>>>
>>> if you have only one output, you can use the rawdataoutput paramater,
>>> just like this WPS request:
>>>
>>>
>>> http://artemis.geogr.uni-jena.de/cgi-bin/testbox.cgi?service=WPS&version=1.0.0&request=Execute&identifier=fossgis_wps_proj&datainputs=[epsg_target=2927;epsg_source=4326;wkt=POINT(11%2051)]&rawdataoutput=output
>>>
>>> In your case it should be &rawdataoutput=out. Then you will get directly
>>> the data from this output.
>>>
>>> Cheers,
>>> Jonas
>>>
>>> ----- Am 23. Okt 2016 um 19:17 schrieb Sylvain Beorchia
>>> <sylvain.beorchia at gmail.com>:
>>>
>>> Thank you for the fix Jachym.
>>> But apparently it just changes the output, from :
>>>
>>> ...
>>> <wps:ComplexData mimeType="application/geojson">
>>> <![CDATA[
>>>
>>> WwogICJmb28iLCAKICB7CiAgICAiYmFyIjogWwogICAgICAiYmF6IiwgCiAgICAgIG51bGwsIAogICAgICAxLjAsIAogICAgICAyCiAgICBdCiAgfQpd
>>> ]]>
>>> </wps:ComplexData>
>>>
>>> to:
>>>
>>> <wps:ComplexData mimeType="application/geojson">
>>> [ "foo", { "bar": [ "baz", null, 1.0, 2 ] } ]
>>> </wps:ComplexData>
>>>
>>>
>>> JSON, but still in XML result.
>>> Am i doing something wrong in my code ?
>>>
>>>
>>> Thanks .
>>>
>>> Sylvain.
>>>
>>>
>>> 2016-10-23 8:01 GMT+02:00 Jachym Cepicky <jachym.cepicky at gmail.com>:
>>>>
>>>> Hi Sylvain,
>>>> fixed in master https://github.com/geopython/pywps/pull/201
>>>>
>>>> Hope, it works
>>>>
>>>> J
>>>>
>>>>
>>>>
>>>> so 22. 10. 2016 v 23:42 odesílatel Sylvain Beorchia
>>>> <sylvain.beorchia at gmail.com> napsal:
>>>>>
>>>>> Hi all,
>>>>>
>>>>> Trying to build my first WPS, i want to return JSON outputs. After many
>>>>> tests, i always got some JSON encoded chars embeded in XML, or clear JSON
>>>>> embeded in XML...always XML.
>>>>> Here is the simple code i've tried :
>>>>>
>>>>>
>>>>> import json
>>>>> from pywps import Process, LiteralInput, LiteralOutput, OGCUNIT, UOM,
>>>>> ComplexInput, ComplexOutput, Format, FORMATS
>>>>>
>>>>> class Test(Process):
>>>>>     def __init__(self):
>>>>>         inputs = [LiteralInput('name', 'Input name',
>>>>> data_type='string')]
>>>>>         outputs = [ComplexOutput('out', 'Referenced Output',
>>>>> supported_formats=[Format('application/geojson')])]
>>>>>
>>>>>         super(Test, self).__init__(
>>>>>             self._handler,
>>>>>             identifier='cartogsm',
>>>>>             title='Process Test',
>>>>>             version='1.0.0.0',
>>>>>             inputs=inputs,
>>>>>             outputs=outputs,
>>>>>             store_supported=True,
>>>>>             status_supported=True
>>>>>         )
>>>>>
>>>>>     def _handler(self, request, response):
>>>>>         data = json.loads('["foo", {"bar":["baz", null, 1.0, 2]}]')
>>>>>         out_bytes = json.dumps(data, indent=2)
>>>>>         response.outputs['out'].output_format = 'application/json'
>>>>>         response.outputs['out'].data = out_bytes
>>>>>
>>>>>         return response
>>>>>
>>>>>
>>>>> Ouput :
>>>>> ...
>>>>> <wps:ProcessOutputs>
>>>>> <wps:Output>
>>>>> <ows:Identifier>out</ows:Identifier>
>>>>> <ows:Title>Referenced Output</ows:Title>
>>>>> <wps:Data>
>>>>> <wps:ComplexData mimeType="application/geojson">
>>>>> <![CDATA[
>>>>>
>>>>> WwogICJmb28iLCAKICB7CiAgICAiYmFyIjogWwogICAgICAiYmF6IiwgCiAgICAgIG51bGwsIAogICAgICAxLjAsIAogICAgICAyCiAgICBdCiAgfQpd
>>>>> ]]>
>>>>> </wps:ComplexData>
>>>>> </wps:Data>
>>>>> </wps:Output>
>>>>> </wps:ProcessOutputs>
>>>>> </wps:ExecuteResponse>
>>>>>
>>>>>
>>>>> How can i return only JSON, with no XML at all ?
>>>>>
>>>>> Thank you.
>>>>> _______________________________________________
>>>>> pywps-dev mailing list
>>>>> pywps-dev at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/pywps-dev
>>>
>>>
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