[OpenLayers-Users] OpenLayers Proxying in IIS
Linda Rawson
linda.rawson at gmail.com
Mon Oct 15 17:03:53 EDT 2007
I should have been more specific. I am very familiar with WMS. Thanks for
the info!
I just needed to send a *username:password@* to the service and that is
where it is coughing and puking but only in IE. I think with tilecache I
will need to adjust the proxy parameters in the cache.py but I was wondering
if anyone else got around this problem. You seemed to be a pretty good
expert on proxy so I emailed you.
Thanks!
Linda Rawson
On 10/15/07, Jeff Dege <jdege at korterra.com> wrote:
>
> (You sent this just to me, instead of to the list. I'm CC'ing it to the
> list).
>
> First, I'm by no means the expert on this stuff. But I'll give it a
> shot. Others can correct me, if I'm messing up. (Though this is pretty
> simple, getting-started kind of stuff, and may be within my competency.)
>
> It sounds as if you're trying to plug the WMS server URL directly into
> your browser, as given, and it's not working for you. That's not a
> surprise. A WMS server needs a lot of complicated arguments appended to
> the URL, and it doesn't return an HTML page, suitable for browsing.
>
> If you want to display a map, using data from WMS server, you'll need a
> map viewer - like OpenLayers. Your browser should point to a web page
> containing OpenLayers javascript code, and that web page should build a
> layer using the WMS URL you are working with.
>
> Look at: http://openlayers.org/dev/examples/wms.html
>
> Then look at the code:
>
> function init(){
> map = new OpenLayers.Map( 'map' );
> layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
> "http://labs.metacarta.com/wms/vmap0", {layers:
> 'basic'} );
> map.addLayer(layer);
>
> map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
> map.addControl( new OpenLayers.Control.LayerSwitcher() );
> }
>
> This declares a map, and adds a WMS layer, using a WMS server at
> labs.metacarta.com.
>
> If you replace that url with the one you have (putting in the real
> username and password), you should be able to get a start.
>
> You may have to set the longitude and latitude to different values to
> center the map where you want.
>
> And the WMS server you're trying to access may not define a layer named
> 'basic'.
>
> You can get a list of available layers by passing a GetCapabilities
> request to the WMS server. This will return an XML document describing
> what the WMS server is capable of providing.
>
> The URL for the metacarta site above is:
>
> http://labs.metacarta.com/wms/vmap0?version=1.1.1&service=wms&request=Ge
> tCapabilities
>
> For your site, it would be something like:
>
> http://username:password@image.globexplorer.com/gexservlets/wms?version=
> 1.1.1&service=wms&request=GetCapabilities
>
>
>
> > -----Original Message-----
> > From: linda.rawson at gmail.com [mailto:linda.rawson at gmail.com]
> > Sent: Monday, October 15, 2007 12:20 PM
> > To: Jeff Dege
> > Subject: Re: OpenLayers Proxying in IIS
> >
> > Jeff,
> >
> > I am using Digital Globe and they gave me the following url
> > for their WMS service. They suck! Anyway I have vented.
> >
> > http://username:password@image.globexplorer.com/gexservlets/wms
> >
> > How on earth do I send this URL to IE or tilecache? It
> > totally returns errors. I assume I use a proxy but I was
> > wondering if you could send me in the right direction.
> >
> > Thanks,
> > Linda Rawson
> >
> > Jeff Dege wrote:
> > >
> > > When I asked Erik whether it would be appropriate to suggest a
> > > commercial package on the list, he said yes, it might be of help to
> > > others with the same problem, and it would probably
> > encourage others to
> > > offer their own solutions, which would also be of help to
> > others with
> > > the same problem.
> > >
> > >
> > >> -----Original Message-----
> > >> From: John Cole [mailto:john.cole at uai.com]
> > >> Sent: Friday, October 05, 2007 10:56 AM
> > >> To: Jeff Dege; users at openlayers.org
> > >> Subject: RE: [OpenLayers-Users] OpenLayers Proxying in IIS
> > >>
> > >> Search the mailing list, I posted a WFS proxy in asp.net a
> > while back.
> > >>
> > >> John
> > >>
> > >> -----Original Message-----
> > >> From: users-bounces at openlayers.org
> > >> [mailto:users-bounces at openlayers.org] On
> > >> Behalf Of Jeff Dege
> > >> Sent: Friday, October 05, 2007 9:57 AM
> > >> To: users at openlayers.org
> > >> Subject: [OpenLayers-Users] OpenLayers Proxying in IIS
> > >>
> > >> OpenLayers uses AJAX, and AJAX has a problem with cross-domain http
> > >> requests. So OpenLayers has a mechanism by which a proxy
> > >> prefix can be
> > >> prepended to every request, directing the request to a proxy
> > >> site on the
> > >> host domain.
> > >>
> > >> The issue has always been how to set up such a proxy site.
> > >>
> > >> If your website is hosted by Apache, it's easy. Apache ships
> > >> with tools
> > >> that make creating such a proxy easy.
> > >>
> > >> If your website is IIS, it has not been. I, at least, have
> > >> been unable
> > >> to find either public domain code, or understandable
> > instructions, on
> > >> how to create a proxying site for IIS.
> > >>
> > >> I've asked on OpenLayers-Users, and had no answers. I've asked
> > >> elsewhere, and had no answers.
> > >>
> > >> Eventually, I found a discussion of the issue:
> > >>
> > >> http://blogs.msdn.com/david.wang/archive/2005/08/01/HOWTO_Comm
> > >> on_URL_Red
> > >> irection_Techniques_for_IIS_Summary.aspx
> > >>
> > >> The relevant quote:
> > >>
> > >> No one seems to provide modules to do Server-Side Redirection or
> > >> Server-Side
> > >> Forwarding on IIS for free. At least, I am not aware of any
> > >> free/open-source
> > >> add-on IIS modules which implement those Server-Side
> > behaviors; I
> > >> only know
> > >> of for-fee modules like ISAPIRewrite.
> > >>
> > >> Which got me looking for ISAPIRewrite. This I found at:
> > >>
> > >> http://www.helicontech.com/isapi_rewrite/
> > >>
> > >> This is a commercial, but reasonably priced ($99), ISAPI
> > >> filter DLL that
> > >> implements the functionality of Apache's mod_rewrite and
> > >> mod_proxy. And
> > >> with it, creating a forwarding proxy for OpenLayers is simple.
> > >>
> > >> ISAPI_Rewrite has a "lite" version that is free, but the
> > lite version
> > >> doesn't do proxying. The commercial version is available
> > for download
> > >> on a 45-day free trial. I downloaded it yesterday
> > morning, and had a
> > >> proxy working before lunchtime.
> > >>
> > >> I know there are others who have had the same problem.
> > This may be of
> > >> help.
> > >>
> > >> _______________________________________________
> > >> Users mailing list
> > >> Users at openlayers.org
> > >> http://openlayers.org/mailman/listinfo/users
> > >>
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> > >> Date: 10/4/2007
> > >> 8:59 AM
> > >>
> > >>
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> > >> 8:59 AM
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> > > _______________________________________________
> > > Users mailing list
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> > >
> > >
> > Quoted from:
> > http://www.nabble.com/OpenLayers-Proxying-in-IIS-tf4575776.htm
> > l#a13064168
> >
> >
>
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