[Zoo-discuss] ZOO-Project OGC API - Processes User Interface

[Pablo J. Zader]

Hi Gerald,
great job! Thank you for this.

I have a query, maybe you can clarify it for me, what is the difference
between the api[1] that the ogc provides and zoo-project?

Is the ogc api just the interface or does it also run processes?
zoo-project, runs processes but doesn't have a restfull api?

Cheers
Pablo

[1] https://ogcapi.ogc.org/processes/

El lun., 2 nov. 2020 a las 13:04, Gérald Fenoy (<gerald.fenoy at geolabs.fr>)
escribió:

> Dear all,
> I am glad to present some enhancements that has been added lately on the
> ZOO-Project and especially the addition of a basic User Interface  (UI).
>
> I made this UI available on this demo server [1], as said it is a really
> basic UI where one can browse the processes available from the /processes
> path [2], get detailed informations from the /process/{processId} path
> (i.e. using OTB.BandMath processId [3]) but also use this same page to
> produce the JSON Execute request to be sent to the ZOO-Kernel with OGC API
> - Processes activated.
>
> Indeed, from this last part of the UI, users have an HTML form that can be
> used to configure the inputs, the outputs and other parameters to be sent.
> From this HTML form, complex data can be passed by reference only when
> literal input can be defined right from the corresponding field. To
> generated the JSON Execute request, one can click on the « Submit »
> button. Note that in case you did not define a required input properly, you
> will be prompted to fill them.
>
> Also, as we now get the callbacks [4] definition supported by the
> ZOO-Kernel, the UI is automatically defining a URL for successUri,
> inProgressUri and failedUri. The consequence is that the ZOO-Kernel will
> send the current status of the execution of a process to the defined Uris.
> Also, when one click on the « Submit job » button appearing in the modal, a
> web socket is used to get the up-to-date information about status of
> execution of a process. Note that the service implemented to handle this is
> a very trivial python code [5] using redis and a uuid generated by the
> ZOO-Kernel to keep track of whom the messages should be targeted to. We
> implemented the UI this way to illustrate how the callbacks can be used to
> avoid polling using the OGC API - Processes.
>
> The UI uses the Cheetah Tempalte Engine [6] and will require that the
> display service [7] is installed on your server. Also, to simplify the URLs
> to access the OGC API - Processes I have added this .htaccess [8] sample to
> show how to setup the transparent invocation of the display service in case
> the URL ends with .html. You may notice that the rewrite rules defined in
> this file use the original URL to create a Xlink:href that is passed as an
> input to the display Service which is responsible to produce the HTML
> output. The display service also rely on the Cheetah template [9] which
> define the way data should be shown in the HTML layout. One more time, this
> HTML code is very basic and require improvement here and there.
>
> Note that, by now, only the document value is acceptable for the response
> parameter in the JSON Execute request.
>
> I hope you will appreciate the UI. I am more than open to any comment,
> enhancement request and so on.
>
> I wish you a great day and a great week ahead.
>
> Best regards,
>
>
> [1] https://demo.mapmint.com/ogc-api/index.html
> [2] https://demo.mapmint.com/ogc-api/processes.html
> [3] https://demo.mapmint.com/ogc-api/processes/OTB.BandMath.html
> [4] https://swagger.io/docs/specification/callbacks/
> [5]
> http://www.zoo-project.org/trac/browser/trunk/zoo-project/zoo-services/utils/open-api/server/publish.py
> [6] https://cheetahtemplate.org/
> [7]
> http://www.zoo-project.org/trac/browser/trunk/zoo-project/zoo-services/utils/open-api/cgi-env
> [8]
> http://www.zoo-project.org/trac/browser/trunk/zoo-project/zoo-services/utils/open-api/server/.htaccess
> [9]
> http://www.zoo-project.org/trac/browser/trunk/zoo-project/zoo-services/utils/open-api/templates/index.html
>
> Gerald Fenoy
> Chair, ZOO-Project PSC
>
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> Zoo-discuss at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/zoo-discuss



-- 

Pablo J. Zader
Lic. en Cs. de la Computación + MSc. en Aplicaciones Espaciales de Alerta y
Respuesta Temprana a Emergencias
pablo.zader at gmail.com

Universidad Nacional de Córdoba
Av. Valpáraíso s/n Ciudad Universitaria
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<http://linkedin.com/in/pablo-javier-zader-7a232125>

*"Los Grandes Hombres hablan sobre ideas...  Los Hombres Promedio hablan
sobre cosas...  Los Hombres Pequeños hablan.. de otros Hombres.*

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