[Mapbender-dev] planned changes to updateWMS?

Arnulf Christl arnulf.christl at ccgis.de
Tue Apr 18 12:17:27 EDT 2006

Michael Schulz wrote:
> Hi,
> I was wondering what the planned changes to class updateWMS are?
> Do they include a chance to (semi-)automatically update wms?

that was the intention. Currently no one is working on it as we are busy 
with code review, migration and the next version is already looming in 
the door. If you have interest we can get going on this together - but 
as already said we can't do much but assist and guide.

> Unfortunately e.g. MapServer (don't know about other wms servers) 
> doesn't seem to implement the updateSequence attribute, which would be 
> very well suited to check for a newer getCapabilities doc.

Yes, but we cannot trust this to work as we connect any WMS. What we are 
doing is comparing the local copy of the the capabilities document 
character by character with a freshly requested one. But yes, there are 
some difficulties. One is encoding (yuck!). We have to convert the 
incoming Caps to the encoding of the database (latin1 or UTF-8). When 
comparing we either have to do the same with the fresh request or store 
the copy as a blob inthe hope that it does not care for encoding (in 
binary form it should not, but you know all about "shouldnots").

> Cheers, Michael

I'd be happy to get this topic going asap, just say "Go".


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