[MapProxy] Chance the cache using a dpi parameter from the request

[Andrea Peri]

Hi,

I need to change the resolution of the map returned following the dpi
parameter from the request of the gis client.
To do this, I try to find a solution to use a different cache folder for
the same layer when the dpi from the request are different.

I try to have 2 kind of cache. One for 90 dpi and another for 300dpi.
The layer should take from the 90 when the user do not put the dpi param or
set explicitly the dpi=90.
Otherwise the layer use the 300 dpi cache when the user request ask foto
dpi=300.

Is this allowed with mapproxy ?

Manu THX.
Andrea Peri
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