[MapProxy-dev] Trigger seeding in mapproxy via REST

[André Henn]

Hi all,

seeding for tile generation can currently -afaik- only be started using 
the mapproxy-seed - script and a corresponding seed.yaml.

But sometimes, it might be useful to trigger re-seed / cleanup for 
certain areas or caches by an external application without calling the 
reseed script directly.
For example, cache handling for frequently used layers that are updated 
only in a certain area could be such a use case.

I think, a (small) WSGI application (like wsgiapp.py) providing a REST 
endpoint (HTTP POST) could be a solution. This endpoint would handle a 
json body containing (maybe a shortened) seeding configuration, for 
example like this:

{
     "seedConfig": {
         "cleanups": {
             "cleanupPolygon": {
                 "caches": [
                     "layer_cache"
                 ],
                 "coverages": [
                     "changes_entity_area1"
                 ]
             }
         },
         "coverages": {
             "changes_entity_area1": {
                 "bbox": [
                     638207.82,
                     5683208.6,
                     638666.91,
                     5683227.69
                 ],
                 "srs": "EPSG:25832"
             }
         }
     },
     "config": {
         "dry_run": false,
         "concurrency": 2
     }
}

Do you think, such a REST endpoint might be included in mapproxy core, 
or would this be some kind of "plugin" / custom build?

If you are interested, I could provide a corresponding PR draft for this.

Kind regards,
André



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