On Mon, Mar 24, 2008 at 03:51:10AM -0700, ChrisWebster wrote: > > I'm new to OL, Ajax etc, so I hope you'll excuse this dumb question, but.... > > I have OL and GeoServer running on my local machine. Apache is at > http://localhost/, and geoServer is on http://localhost:8080/geoserver/. I > can load WMS layers from my local GeoServer into a web page on localhost > using OpenLayers jsut fine. But if I try to load a WFS layer into the same > web page from the same GeoServer instance, I get an error: > > "Permission denied to call method XMLHttpRequest.open" > > The WFS layer seems to be OK if I load it via GeoServer's own demo pages > (which are running on http://localhost:8080), so as far as I can tell, the > feature layer and GeoServer are working OK together. It's when I try to > load the WFS layer with OpenLayers via my Apache server that things fall > apart. > > This looks like the usual cross-domain problem, but why should I be getting > this for the WFS layer if everything works with my WMS layer served via > exactly the same servers?
WMS tiles are served via <img> tags; <img> is safe, and not subject to the Same Origin Policy. (Similarly true for Javascript files, which isw hy you can load http://openlayers.org/api/OpenLayers.js into your app not hosted on OpenLayers.org.) WFS Tilse are XMLHTtprequests: there is no other way to get teh data, so it's a violation of the Same origin policy. http://trac.openlayers.org/wiki/FrequentlyAskedQuestions#ProxyHost has information on how to resolve. Regards, -- Christopher Schmidt MetaCarta _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
