[Geoserver-devel] Using WMS Freemarker templates for GetFeature output as well?

Andrea_Aime4 · January 11, 2024, 6:26pm

Hi all,
I’m considering extending the usage of HTML GetFeatureInfo templates for WFS as well.
Here are some pros/cons of that approach:

GetFeatureInfo is already taking N feature collections and encoding the output towards the desired format. It’s the same as what a GetFeature does (a GetFeature can request multiple feature types, too)
The Freemarker encoding machinery is 95% independent of WMS, there is only one WMS setting called “GetFeatureInfo results auto-escaping”. This setting could have to be replicated for WFS as well
There are a couple of places where adding a core HTML WFS output format might cause friction, one is users of the XSLT extension, that could have configured a HTML output format, and the OGC API, that has its own native HTML output format.
The XSLT does not seem used very much, so probably not a big deal, while the OGC API module could recognize the WFS HTML output format and just blacklist it from usage in OGC API Features
As an alternative, the WFS HTML output format based on Freemarker templates could become its own separate module, maybe a community one, solving a couple of problems, it could depend on WMS too, releaving the issue with the configuration, and being optional, it would not affect existing installations. Downside, the module would be a very thin implementation, which may make people wonder why it’s even there
Opinions?

Cheers
Andrea

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jive · January 17, 2024, 1:13am

Andrea,

I think that is a good idea? Similar in use to the WMS “preview” link? I think this is “simple” enough functionality that having it is core should be fine (only take it into its own module if you wish to backport eh?).

You mention the overlap with OGCAPI, but I view that document as a bit more “connected” with links to the collection page and so on. I view the free marker page as … very simple?

Would you bother with page next / prev controls or let people adjust the URL…

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Jody Garnett