[MapServer-users] Link in SLD doc returns an exception

[Bjørn Ove Grøtan]

Brent Fraser:
> Hi All,
> 
> I'm experimenting with SLD and reading the MapServer doc.  On the SLD page under Server Side Support, it says "Test the remote SLD request" with a link to
> 
> https://demo.mapserver.org/cgi-bin/wms?SERVICE=wms&VERSION=1.1.1&REQUEST=GetMap&LAYERS=country_bounds&FORMAT=png&WIDTH=400&HEIGHT=300&SRS=EPSG:4326&STYLES=&BBOX=-180.0,-90.0,180.0,90.0&TRANSPARENT=TRUE&SLD=https://demo.mapserver.org/ogc-demos/map/sld/sld_line_simple.xml
> 
> The link looks good but it returns an exception:
> 
> <?xml version='1.0' encoding="UTF-8" standalone="no" ?>
> <!DOCTYPE ServiceExceptionReport SYSTEM "http://schemas.opengis.net/wms/1.1.1/exception_1_1_1.dtd">
> <ServiceExceptionReport version="1.1.1">
> <ServiceException>
> msSLDApplySLDURL: WMS server error. Could not open SLD https://demo.mapserver.org/ogc-demos/map/sld/sld_line_simple.xml and save it in a temporary file. Please make sure that the sld url is valid and that the temporary path is set. The temporary path can be defined for example by setting TEMPPATH in the map file. Please check the MapServer documentation on temporary path settings.
> msHTTPExecuteRequests(): HTTP request error. HTTP GET request failed with status 404 () for https://demo.mapserver.org/ogc-demos/map/sld/sld_line_simple.xml
> </ServiceException>
> </ServiceExceptionReport>
> 
> Is the demo in a repo somewhere or does someone have some insight?  Thanks!

The error message is correct,
https://demo.mapserver.org/ogc-demos/map/sld/sld_line_simple.xml returns a 404
Page not found, The root folder at /ogc-demos/ has been removed at some point.

Be aware though, that not all WMS-servers allow (by configuration) external
hosted SLD-files due to potential XXE (XML eXternal Entity) vulnerability, 

Also might be of interrest: the Mapserver implementation of GetStyle-request
(return SLD for a given layer) has some limitations on line-symbols where
images (png) are placed along the line symbol, and same with polygon fills
using a repeated png-file as fill - but simple polygon symbologies with a solid
fill color works as expected.

-- 
Kind regards
 
Bjørn Ove Grøtan