OpenLayers can indeed use POST requests for each tile in a map:
http://dev.openlayers.org/docs/files/OpenLayers/Layer/WMS/Post-js.html
This feature was developed specifically to allow larger SLDs in GetMap
requests so it should work well for this use case. Here's an example of it
in use: http://openlayers.org/dev/examples/wms-long-url.html
--
David Winslow
OpenGeo - http://opengeo.org/
On Sat, Nov 27, 2010 at 4:47 AM, Andrea Aime
<[email protected]>wrote:
> On Wed, Nov 24, 2010 at 5:48 AM, Adam Ratcliffe <[email protected]> wrote:
> > Hi,
> >
> > I would like to pass a reference to an external SLD with a GetMap
> request. The SLD is created using an OpenLayers client and contains a
> <NamedLayer> element for each layer in the target namespace, and within each
> <NamedLayer> element there are separate <UserStyle> elements for the various
> rendering intents supported by OpenLayers.
> >
> > Each GetMap request will be for a single layer and should use the
> 'default' <UserStyle>.
> >
> > I can pass a reference to the SLD using the 'SLD' parameter but I don't
> know how to target a specific <UserStyle> in the SLD - if that is indeed
> possible. A sample SLD is shown below.
>
> What you need is library mode. You have to setup your SLD so that the
> named layers do match the layer names in the request, and then the
> &styles parameter can refer
> to any user style associated in the sld to the corresponding layer.
>
> However the SLD you reference by &SLD=... must be accessible to
> geoserver, meaning it should be possible to make an http connection
> from geoserver to that file
> and download it. I don't think this can be done using openlayers
> alone, the browser cannot act as a web server.
>
> An alternative is to send a POST request for each tile, but I don't
> think openlayers can do that either.
> Maybe a way is to use RESTConfig to statically add the file to the
> geoserver catalog, and then just refer it by name in the GetMap
> requests.
>
> Cheers
> Andrea
>
> -----------------------------------------------------
> Ing. Andrea Aime
> Senior Software Engineer
>
> GeoSolutions S.A.S.
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584962313
> fax: +39 0584962313
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
> -----------------------------------------------------
>
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