[mapserver-users] wms_enable_request header vs. layer

Passmore, James H. jpass at bgs.ac.uk
Thu Dec 7 02:30:01 PST 2017


Technically QGIS (or any other client) is going against the WMS standard by requesting something not in GetCapabilities response, and MapServer is at fault for responding with something not advertised.

Of course a GetMap operation is mandatory for a WMS, so you might argue that MapServer is at fault for providing a GetCapabilities response that doesn't advertise a GetMap operation.

James

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Today's Topics:

   1. wms_enable_request header vs. layer (Jörg Thomsen (WhereGroup))


----------------------------------------------------------------------

Message: 1
Date: Wed, 6 Dec 2017 13:41:36 +0100
From: Jörg Thomsen (WhereGroup)  <joerg.thomsen at wheregroup.com>
To: "mapserver-users at lists.osgeo.org"
<mapserver-users at lists.osgeo.org>
Subject: [mapserver-users] wms_enable_request header vs. layer
Message-ID: <4dccde7c-ce96-e22a-af43-718d4631a8bb at wheregroup.com>
Content-Type: text/plain; charset=utf-8

Hi,

I need an explanation for ows_enable_request.

There are two mapfiles, brw_enable_header.map and brw_enable_layer.map The only difference is, that in brw_enable_header.map I have enabled all ows requests within the metadata-section in the header and in each layer.

In brw_enable_layer.map I only have enabled all requests in the layer-section, but not in the header.

Both WMS allow the capability-request and in brw_enable_layer.map the information for the wms-request is missing:
https://www.diffchecker.com/KjsX2Wbk

OK. The brw_enable_layer.map (with no ows_enable_reqeust in the header) allows GetMap-Requests:
http://h2743629.stratoserver.net/cgi-bin/mapserv?map=/data/ows/map/brw_enable_layer.map&&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=48.60086340827337636,9.02229999999999954,48.65160000000000196,9.0733134442446044&CRS=EPSG:4326&WIDTH=426&HEIGHT=422&LAYERS=bodenrichtwertzone&STYLES=&FORMAT=image/png&DPI=96&MAP_RESOLUTION=96&FORMAT_OPTIONS=dpi:96&TRANSPARENT=TRUE

I think this is technically correct, but as the capabilities don't provide any information for the getMap-Request (no online-ressource, no image-formats), a client does not know this parameters. In the result I cannot load the WMS into a mabpender-application.
I wonder why (and I am surprised) QGIS doesn't have any problems with this wms.

Is this how it shall be? Is MapServer working correct or Mapbender? Or both, but ...?

Regards, Jörg

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