[mapserver-users] Trying to get GeoWebCache to work with MapServer

[thomas bonfort]

what are the exact urls called by geowebcache? (from your apache logs)

I'd suspect a typo in your wms definition, given the stray "?" in your
error message. eg:

http://server/cgi/mapserv/map=path/to/map
instead of
http://server/cgi/mapserv?map=path/to/map

regards,
thomas

On Wed, Dec 17, 2008 at 15:32, John Westwood <John.Westwood at port.ac.uk> wrote:
> Hi,
>
> I am having some problems trying to get GeoWebCache working with MapServer. I currently have a fully functional MapServer / TileCache / OpenLayers system setup on the server. MapServer is functioning as a WMS server.
>
> With a GeoWebCache layer I receive pink tiles, right clicking and viewing the image tile reports the following type of GeoWevCache error:
>
> 400: Empty metatile, error message: MimeType mismatch, expected image/png but got text/html
>
> I believe this means that GeoWebCache received a text response from MapServer instead of an image response. The previous error also came with a MapServer url. Hitting that url brings back the following MapServer error:
>
> msEvalRegex(): Regular expression error. String (/data/map-files/gbhgis.map?exceptions=application/vnd.ogc.se_inimage) failed expression test
>
> I tried stripping down my map file to just a single layer but that did not help. I also tried using the shp2img command with my full map file:
>
> shp2img -m /data/map-files/gbhgis.map -o test.png -map_debug 3
>
> The following debug information was output and the resulting png was blank / transparent:
>
> msDrawMap(): Drawing Label Cache, 0.000s
> msDrawMap() total time: 0.001s
> msSaveImage() total time: 0.031s
>
> There are many layers in my map file, yet nothing much happened with shp2img. Something seems a bit fishy. But everything works alright with Tilecache or with MapServer on its own with no caching. I'm confused.
>
> Does anybody have any ideas? Perhaps I could look at and compare the TileCache and GeoWebCache requests in the server log? However, it seems that there may be something more fundamentally wrong if shp2img returns northing.
>
> Regards,
>
> John Westwood
> Great Britain Historical GIS Project
>
>
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