[MapServer-users] getfeatureinfo works from mapserver but not via mapcache

[Trygve Aspenes]

Hi mapserver users list

I have a mapserver with getfeatureinfo available. This seems to return 
the correct value for the selected timestamp for the given layer when 
used directly.

But when I try to reach the same info, ie. getfeatureinfo, from mapcache 
a wrong timestamp is passed to mapserver and then the wrong values are 
returned.

The request received by mapcache(as seen in the logs):
2023-04-14T13:34:20.304781696Z 172.16.16.234 - - [14/Apr/2023:13:34:20 
+0000] "GET /okd-satellite 
&SERVICE=WMS&REQUEST=GetFeatureInfo&VERSION=1.1.1&LAYERS=ash_meteosat_0deg&QUERY_LAYERS=ash_meteosat_0deg&SRS=EPSG%3A3857&BBOX=-3396560.8725830186,6408480.4514,7422652.026383018,11520588.9031&WIDTH=1782&HEIGHT=842&X=333&Y=704&FORMAT=image/gif&INFO_FORMAT=text/html&STYLES=&&TIME=2023-04-11T07%3A15%3A00Z

The request received by mapserver(as seen in the logs):
2023-04-14T13:34:20.303555611Z 172.16.2.224 - - [14/Apr/2023:13:34:20 
+0000] "GET 
/okd-satellite?VERSION=1.1.1&REQUEST=GetFeatureInfo&SERVICE=WMS&STYLES=&FORMAT=image%2fpng&LAYERS=ash_meteosat_0deg&MAP=%2fconfig%2fmapserver-products.map&BBOX=-3396560.872583%2c6408480.451400%2c7422652.026383%2c11520588.903100&WIDTH=1782&HEIGHT=842&SRS=EPSG%3a3857&X=333&Y=704&INFO_FORMAT=text%2fhtml&QUERY_LAYERS=ash_meteosat_0deg&time=2023-03-25T16%3a00%3a00Z 
HTTP/1.1" 200 743 "-" "mod-mapcache/1.11dev"

So what happens. The mapcache request looks correct with 
time=2023-04-11T07:15:00Z, then I guess this request is forwarded to 
mapserver, but I think it is without the TIME parameter. Why I think 
this is because the request I see in the mapserver logs has the default 
time stamp as given in my mapfile.

Are there some configuration I'm missing? I had a look at 
https://github.com/MapServer/mapcache/blob/main/mapcache.xml.sample#L753-L763 
to see how getfeatureinfo should be configured, but no other 
information. My mapcache source config looks like

     <source name="ash_meteosat_0deg_source" type="wms">
         <http>
             <url>http://<my-url>?</url>
         </http>
         <getmap>
             <params>
                 <FORMAT>image/png</FORMAT>
                 <LAYERS>ash_meteosat_0deg</LAYERS>
                 <MAP><my map file></MAP>
             </params>
         </getmap>
         <getfeatureinfo>
             <info_formats>text/html</info_formats>
             <params>
                 <QUERY_LAYERS>ash_meteosat_0deg</QUERY_LAYERS>
             </params>
         </getfeatureinfo>
     </source>

Any hints are appreciated.

Trygve