Description

similar to #7705, but for WMS protocol

How to reproduce

• go to https://mapstore.geosolutionsgroup.com/mapstore/#
• add wms service from https://tiles.craig.fr/pci/service
• add cadastre layer
• zoom to 'Clermont Ferrand'
• try to print pdf

Expected Result
the pdf should contain data from WMS layer

Current Result
the image shows Invalid request: invalid tile size (use 256x256), probably because in the POST data ms2 sends TILED=true (added by https://github.com/geosolutions-it/MapStore2/blob/master/web/client/utils/PrintUtils.js#L490).

the postdata sent to mfprint has this:

{
    "baseURL": "https://tiles.craig.fr/pci/service?",
    "opacity": 1,
    "singleTile": false,
    "type": "WMS",
    "layers": [
        "cadastre"
    ],
    "format": "image/png",
    "styles": [
        ""
    ],
    "customParams": {
        "TRANSPARENT": true,
        "TILED": true,
        "EXCEPTIONS": "application/vnd.ogc.se_inimage",
        "scaleMethod": "accurate",
        "ENV": ""
   }
}

The WMS request sent by mfprint to mapproxy looks like this:
https://tiles.craig.fr/pci/service?BBOX=335973.47%2C5827852.5%2C339748.2%2C5832086.0&WIDTH=713&HEIGHT=800&format_options=dpi%3A96&map_resolution=96&FORMAT=image%2Fpng&STYLES=&ENV=&LAYERS=cadastre&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&TILED=true&SRS=EPSG%3A3857&REQUEST=GetMap&VERSION=1.1.1&SERVICE=WMS&scaleMethod=accurate&TRANSPARENT=true

which reproduces the error. Without TILED=true the query succeeds.

The same layer successfully prints when being added/queried as WMTS since #7705.

• Not browser related

From my understanding of WMS, if using TILED=true the HEIGHT and WIDTH parameters should match the server tile size (which at that point mapstore knows, since it uses it to display the layer?).

@offtherailz, any idea ?