Mapserver and SLDs

[Adam Quiney]

Hello all,

I'm working on an application that (in part) dynamically generates
SLDs, then publishes these SLDs through a Java servlet.  I've enjoyed
reasonable success so far, but have hit a glitch when trying to test
against this specific server: (http://wms1.agr.gc.ca/cgi-bin/mapeco).

Our application works by allowing the user to specify styling
information, then publishing this information as an SLD document,
through a Java Servlet.  This technique has worked with all of the
servers so far, though with your server, I seem to run into problems
with the fact that I am using a Servlet to publish this information.   I
have checked to make sure that the servlet is reachable from the
outside web, and that the SLD document being generated is indeed
correctly formed and valid to the SLD 1.0.0 specification.  In order  to
ensure that the error is not occuring due to a clash of layer  stylings
(or something else along those lines), I have changed the SLD
generating servlet to simply return the same string everytime it  is
called - this string provides valid styling (in the form of a  complete
SLD document) for the "ecodistricts" layer made available by  this
server.  When I attempt to pass the URL to this servlet in the  query
string to the server, the layer is not styled according to the  SLD
document.  The full URL I am using is:

http://wms1.agr.gc.ca/cgi-bin/
mapeco?VERSION=1.1.1&REQUEST=GetMap&LAYERS=ecodistricts&STYLES=&SLD=htt
p://office.refractions.net:9999/imf-ows/
SLDGenerator&SRS=EPSG%3A4269&BBOX=-138.0,45.438244853737814,-
114.0,63.561755146262186&WIDTH=923&HEIGHT=697&FORMAT=image/
png&TRANSPARENT=TRUE&EXCEPTIONS=application/vnd.ogc.se_inimage&

The interesting thing is, when I copy the output from my servlet, and
paste and save it into a web-accessible file (with either the  extension
.sld or .xml), I can provide the URL to this file in my  request
(instead of the URL to the servlet), and the layer is  returned, styled
according to the SLD document.  I have not  encountered this problem in
any other case.  To see the layer being  styled correctly, use this URL:

http://wms1.agr.gc.ca/cgi-bin/
mapeco?VERSION=1.1.1&REQUEST=GetMap&LAYERS=ecodistricts&STYLES=&SLD=htt
p://office.refractions.net/~aquiney/
popplace.xml&SRS=EPSG%3A4269&BBOX=-138.0,45.438244853737814,-
114.0,63.561755146262186&WIDTH=923&HEIGHT=697&FORMAT=image/
png&TRANSPARENT=TRUE&EXCEPTIONS=application/vnd.ogc.se_inimage&

The xml file can be viewed here:

http://office.refractions.net/~aquiney/popplace.xml

You can view the output generated by the servlet here:

http://office.refractions.net:9999/imf-ows/SLDGenerator


Is it possible to somehow configure mapserver in a manner that would
prevent the passing of an SLD document this way?  Has anyone else ever
encountered this problem?

Thanks a lot,

--Adam

--

Adam Quiney
Analyst
Refractions Research Inc.