I am passing a spatial query such as
CONTAINS(geom, POLYGON((// geometry))) in the
cql_filter, but for big polygons
GET request the allowed URI length is violated and hence my requests is getting HTTP 414 status code 'URI too long'.
I looked for the solution so someone suggested me to use POST request and it worked, but I don't know how to modify the WMS GET request in Leaflet to POST?