I do not think it is a string length limit. The IIS returns a separate error for that. At least it does when you exceed the URL length limit in a GET request.
I have been doing some tests and it looks like it might be more of a limit in the number of parameters in the POST request. I can't find any info regarding the maximum number of parameters that you can send in one request (to an IIS server), but again, I would think that IIS would be responding with a more specific error if the limit was with it. Is it possible that the MapServer CGI is limited to 100 POST parameters? Fawcett, David (MPCA) wrote: > > According to the docs, starting with MapServer 5.0, there is no limit to > the number of layers in a mapfile. > http://mapserver.org/introduction.html#layer-object > > I am guessing that you are running into a different issue. > > Have you captured the post request string and examined it to make sure > that it is valid? > > Are you running into a string length limit for your post request? The URL > for your post request would be limited to ~2k char for IE, but this only > includes the URL to the server, not the key:value pairs. There could be a > size limit for post requests set on your Web server to help prevent DOS > attacks. I don't know where this would be set in IIS. > > David. > > -----Original Message----- > From: mapserver-users-boun...@lists.osgeo.org > [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of stoli > Sent: Monday, September 20, 2010 6:18 PM > To: mapserver-users@lists.osgeo.org > Subject: [mapserver-users] CGI returning a 502 error > > > I'm using the ms4w binaries (5.6.3) under IIS 7. > > My application sends (via http POST) a lot of parameters to modify the > .map > file. Mostly to add features to layers that are turned off by default and > then make them visible. When my parameters cause the map to show over 50 > layers, the IIS returns a 502 error. > > I realize that the max layers are set to 100 in the default map.h file, > but > like I said, I am using the compiled binaries from ms4w. Does anyone know > if > they change that to 50 when they compile, or should I look elsewhere to > find > my problem? > > > -- > View this message in context: > http://osgeo-org.1803224.n2.nabble.com/CGI-returning-a-502-error-tp5552675p5552675.html > Sent from the Mapserver - User mailing list archive at Nabble.com. > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/CGI-returning-a-502-error-tp5552675p5555339.html Sent from the Mapserver - User mailing list archive at Nabble.com. _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users