[OpenLayers-Users] openlayers,geoserver in external web app

[Alessandro Ferrucci]

Can't you instruct your struts action class to "decorate" the return http
message with some application specific error codes in the header portion of
the SMS http message? Then you can write an open layers filter that upon
receipt of the WMS response you check for the existence of those error
codes, and handle things accordingly.

On Friday, December 28, 2012, pierre de fermat wrote:

> It is slightly more complicated than that. For session related
> exceptions, i need to show a dialogue box and redirect to login page.
> For timeout errors, i can request a 'try again' message etc. There are
> also lots of application logic related exceptions that I need to
> handle.
>
> Best
> Pierre
>
> On 12/28/12, Tue Topholm <tt at sugee.dk <javascript:;>> wrote:
> > Why not just return an image with the error in…..
> > Den 28/12/2012 kl. 11.41 skrev pierre de fermat
> > <fermatslittletheorem at gmail.com <javascript:;>>:
> >
> >> Thanks Tue. I managed to redirect it and it works. However, this
> approach
> >> cannot handle exceptions. When i fake the wms call, and if the struts
> >> layer encounters an exception (session related, db timeout etc) , I just
> >> end up with an empty image. I am not able to redirect such a request via
> >> struts.xml or any other means. The proxy method would also face similar
> >> issues.
> >>
> >> Any thoughts?
> >>
> >> Best
> >> Pierre
> >>
> >>
> >> On Thu, Dec 27, 2012 at 6:06 PM, Tue Topholm <tt at sugee.dk<javascript:;>>
> wrote:
> >> That is the "normal" way to do it....
> >>
> >> You also have the option to provide a proxy url that does exactly what
> you
> >> want.
> >>
> >>
> >> --
> >>
> >> Med venlig hilsen / Kind regards
> >>
> >> Tue Topholm
> >> Sugee
> >> Tlf: +45 32 13 32 32
> >> W: http://www.sugee.dk
> >>
> >>
> >> 2012/12/27 pierre de fermat <fermatslittletheorem at gmail.com<javascript:;>
> >
> >> Hi
> >> I am creating a web app (dojo/struts/postgres/postgis) which amongst
> >> other things, need to deliver GIS capabilities.
> >>
> >> The base infrastructure (security,logging,caching etc) is in place and
> >> other modules are under development. I took up openlayers as my
> >> frontend js for rendering maps from geoserver.
> >>
> >> For other modules, the request (ajax and regular) goes through my
> >> struts filter layers -> action class->dao->db route. However,
> >> openlayer requires configuration of wms services URL (provided by the
> >> geoserver) . I can't direct those requests directly to geoserver. I
> >> need my app to trap requests do bunch of validations and then process
> >> it. I am sure any app developer would have gone through the same issue
> >> that i am facing right now.
> >>
> >> i am thinking of 'tricking' openlayer by giving the URL of a struts
> >> action which captures the parameters from the request URL, and then
> >> requesting the geoserver internally for the response.This way i could
> >> manage session, security etc and keep geoserver internally facing. Is
> >> this recomendded? Is there a better way to make openlayer work with
> >> external web app?
> >>
> >> Regards
> >> Pierre
> >> _______________________________________________
> >> Users mailing list
> >> Users at lists.osgeo.org <javascript:;>
> >> http://lists.osgeo.org/mailman/listinfo/openlayers-users
> >>
> >>
> >
> >
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-- 
Signed,
Alessandro Ferrucci
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