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

[pierre de fermat]

Thanks for the pointers. It appears i may have to extend/modify the parts
where the actual requests are processed. Apart from getURL, would it be
worthwhile to look into openlayers.request?


On Sat, Dec 29, 2012 at 7:00 PM, Tue Topholm <tt at sugee.dk> wrote:

> 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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