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

[Tue Topholm]

Would he be able to get the error in onimageloaderror?


The other way is to extend the the geturl, with a second request, where you catch the error….

Den 29/12/2012 kl. 03.40 skrev Alessandro Ferrucci <alessandroferrucci at gmail.com>:

> The onImageLoadError would not allow him to program granular handlers depending on the type of application exception, just one broad error, which sounds like its not enough.
> 
> Alessandro Ferrucci.
> 
> On Friday, December 28, 2012, Tue Topholm wrote:
> What about the onImageLoadError, I don't know if it is deprecated…
> 
> 
> 
> 
> Den 28/12/2012 kl. 14.59 skrev pierre de fermat <fermatslittletheorem at gmail.com>:
> 
> > 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> 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>:
> >>
> >>> 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> 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>
> >>> 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
> >>> http://lists.osgeo.org/mailman/listinfo/openlayers-users
> >>>
> >>>
> >>
> >>
> 
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> 
> 
> -- 
> Signed,
> Alessandro Ferrucci

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