[OSGeo-Discuss] [Analysis] Geospatial server deployment statistics

[Jim Klassen]

On 6/5/20 4:50 PM, Even Rouault wrote:
>
> On vendredi 5 juin 2020 14:18:42 CEST Jody Garnett wrote:
>
> > Interesting so some of the 5000+ WMS services attributed to geoserver may
>
> > be mapserver instances?
>
> I imagine someone with sufficient time and determination could actually do much more than saying this is a Geoserver, this is a Mapserver. You could actually probably tell the precise version number. One advantage of being open source is that our bug trackers are public too. So by looking at which bug a deployment has or not, you could really refine the identification. But that would indeed be time consuming and cumbersome to do. I guess only black hat hackers would be interesting in that :-)
>
> But probably more easily: triggering exception situations in WMS/WFS/etc protocols should help to find the implementation. Error messages are really implementation specific. But maybe part of that was actually done.
>
> Even
>

I'm not sure with GeoServer, but MapServer is very easy to tell from the responses.  The GetCapabilities response even includes the version number in an XML comment (which reminds me, I need to update my MapServer installs).

No parameters:

         https://www.example.org/datasets/wms.map?

No query information to decode. QUERY_STRING is set, but empty.

or, depending on how the server is setup

       mapserv(): Web application error. Traditional BROWSE mode requires a TEMPLATE in the WEB section, but none was provided.

Missing WMS REQUEST parameter:

https://www.example.org/datasets/wms.map?SERVICE=WMS&VERSION=1.3.0

<ServiceExceptionReport version="1.3.0" xsi:schemaLocation="http://www.opengis.net/ogc http://schemas.opengis.net/wms/1.3.0/exceptions_1_3_0.xsd"><ServiceException>
*msWMSDispatch()*: WMS server error. Incomplete WMS request: REQUEST parameter missing
</ServiceException></ServiceExceptionReport>

GetCapabilities:

https://www.example.org/datasets/wms.map?SERVICE=WMS&VERSION=1.3.0&Request=GetCapabilities

       <WMS_Capabilities version="1.3.0" xsi:schemaLocation="http://www.opengis.net/wms http://schemas.opengis.net/wms/1.3.0/capabilities_1_3_0.xsd http://www.opengis.net/sld http://schemas.opengis.net/sld/1.1.0/sld_capabilities.xsd http://mapserver.gis.umn.edu/mapserver http://www.example.org/datasets/wms.map?SERVICE=WMS&service=WMS&version=1.3.0&request=GetSchemaExtension">*<!--**
** MapServer version 7.0.5 OUTPUT=PNG OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS SUPPORTS=RSVG SUPPORTS=ICONV SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS INPUT=JPEG INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE **
**-->*<Service><Name>WMS</Name>...
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