How do I propagate failures from upstream wms-servers?

[Jacolin Yves]

Hi,

Why don't you use 
      "wms_exceptions_format" "application/vnd.ogc.se_inimage" ?

Regards,

Y.
Le Tuesday 06 November 2007 17:35:17 Trond Michelsen, vous avez écrit :
> Hi.
>
> In my mapfile, I have several layers with connectiontype WMS. Once in
> a while, the WMS-servers that deliver these layers will fail, usually
> due to high load, and return an application/vnd.ogc.se_xml
> exception. In these cases, I'd like mapserver to return an exception
> as well, but instead, mapserver will just log the error message in
> MS_ERRORFILE, and continue drawing the rest of the layers. If there
> are no more layers, it will result in a blank image.
>
> (BTW: I've also noticed the same behaviour if the remote wms-server
> answers with an internal server error)
>
> Here's the layer definition that I use for testing. exception.cgi will
> always return a dummy XML exception.
>
> LAYER
>     NAME "exception"
>     TYPE RASTER
>     STATUS ON
>     CONNECTION "http://wms1.oslo.dnmi.no/cgi-bin/exception.cgi"
>     CONNECTIONTYPE WMS
>     OFFSITE 255 255 254
>     METADATA
>       "wms_srs"               "EPSG:4326"
>       "wms_name"              "exception"
>       "wms_server_version"    "1.1.1"
>       "wms_formatlist"        "image/png"
>       "wms_format"            "image/png"
>       "wms_exceptions_format" "application/vnd.ogc.se_xml"
>     END #metadata
> END #layer
>
> Is there something I can do to force mapserver to fail, and return an
> exception if it fails to draw any of the wms-layers?
>
> I'm using mapserver 4.10
>
> $ cgi-bin/mapserv -v
> MapServer version 4.10.0 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
> OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER
> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT
> SUPPORTS=WCS_SERVER SUPPORTS=THREADS SUPPORTS=GEOS INPUT=EPPL7
> INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE DEBUG=MSDEBUG



-- 
Yves Jacolin
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