mapserver as wms client - gracefully handling errors

[Bart van den Eijnden (OSGIS)]

Something went wrong with e-mail formatting (cut and paste from OGC 
pdf), for clarity, it should be:

"wms_exceptions_format "application/vnd.ogc.se_blank"

Best regards,
Bart

Bart van den Eijnden (OSGIS) wrote:

> Hi Matthew,
>
> I haven't tested, but the following could work (it should according to 
> the WMS spec :-) ):
>
> "wms_exceptions_format "*application/vnd.ogc.se_blank *"
>
>
> Best regards,
> Bart
>
> Matthew Perry wrote:
>
>> Hey folks,
>>
>> I've set up a mapfile with a number of datasets plus the terraserver
>> wms. When browsing parts of the earth not covered by terraserver,
>> however, an in-image error message appears:
>>
>> msDrawMap(): WMS connection error. Failed to draw WMS layer named
>> 'Terraserver_DOQ'. This most likely happened because the
>> remote WMS server returned an invalid image, and XML exception or
>> another unexpected result in response to the GetMap request. Also
>> check and make sure that the layer's connection URL is valid.
>>
>> I can get the wms client and my wms server to return xml instead of an
>> inline error but the real question is, how do I force mapserver to
>> simply ignore the cascaded wms when an error occurs so that it can
>> still render the other data in the mapfile without returning an
>> exception?
>>
>> Here's my mapfile entry for reference:
>>
>>
>> LAYER
>>  NAME "Terraserver_DOQ"
>>  STATUS OFF
>>  TYPE RASTER
>>  GROUP "main"
>>  CONNECTIONTYPE WMS
>>  CONNECTION "http://terraservice.net/OgcMap.ashx?"
>>  DEBUG ON
>>  METADATA
>>    "wms_srs"    "EPSG:4326"
>>    "wms_title"    "Digital_Orthophoto"
>>    "wms_name"    "DOQ"
>>    "wms_server_version"    "1.1.1"
>>    "wms_exceptions_format" "application/vnd.ogc.se_xml"
>>    "wms_format"    "image/jpeg"
>>    "wms_layers"    "doq"
>>  END
>>  MINSCALE 10000
>>  MAXSCALE 40000
>>  PROJECTION
>>    "init=epsg:4326"
>>  END
>> END
>>
>
>


-- 
Bart van den Eijnden
OSGIS, Open Source GIS
http://www.osgis.nl