[mapserver-users] how to throw a custom ExceptionReport

[Charlton Galvarino]

Tom, I've thought about this long and hard, and I can't wrap my head around it.

> You can use Perl mapscript WxS to intercept and return a custom
> exception.  Check out
> http://mapserver.gis.umn.edu/docs/howto/wxs_mapscript for info and
> examples.

It looks like those examples are doing what I'm doing in the end . . . dumping out XML.  But perhaps what I need accomplished is a bit trickier?  I don't think I explained in enough detail what I'm doing.

I have a .map that contains something like:

# demo.map
  LAYER
    NAME wind_wave_period_and_direction
    PROJECTION
      "init=epsg:4269"
    END
    TYPE RASTER
    STATUS OFF
    CONNECTION "http://localhost/viz"
    CONNECTIONTYPE WMS
    METADATA
      "ows_title"           "wind_wave_period_and_direction"
      "wms_extent"          "-100 5 -60 50"
      "wms_srs"             "EPSG:4269"
      "wms_name"            "ww3dir_info"
      "wms_server_version"  "1.1.1"
      "wms_format"          "image/png"
      "wms_connectiontimeout" "90"
    END

So what I'm really doing is a cascade WMS request because I'm asking that .amp for the wind_wave_period_and_direction layer.  http://localhost/mapserv?map=demo.map.

The thing that I need to throw the error is the viz CGI in the CONNECTION string above.

So perhaps my question boils down to . . .

What could viz spit out so that this WMS request would know it sees an error via something like EXCEPTIONS=application/vnd.ogc.se_inimage?  What I'm getting now, instead, is the MapServer error saying that the WMS returned an XML exception.  Well, yes, it did -- but I want to SEE it!  :)

TIA.