Hi all,
I wish to update my problem in hope to get more precise help.
I checked what is returned by the server and every time and do a manual
attempt by entering the request URL myself I get "no features were found".
Is it because of the server or from OpenLayers?
I tried to change the name of the layer in the reuqest to something
random, and I received a message telling that the feature type was not
found.
So I guess that it is querying the server with something that exists.
But it can't get any feature from the database. Again, if anyone has any
experience of OpenLayers getting layers from geoserver with PostGIS,
please tell me if there is anything to do in the database to make ot work.
Thank you :)
Marc
Tim Schaub wrote:
Hey Marc-
Marc Desharnais wrote:
To get the getfeatureInfo working. I get the loading message in the
div section 'nodeList'. The problem is that it never seems to get an
answer.
I get the checkpoint popup when I click the map so I guess that this
part is executed well. But it stays forever with the loading message.
So probably "wmsLayer1.getFullRequestString" is not correct or my
database is not quite right... I just have a layer with points.
And I want to query information about thoise points in the database
to display it beside the map.
Since you are making an asynchronous request for the GetFeatureInfo
results, you are subject to the same origin policies that browsers
enforce.
This means that your GetFeatureInfo request won't go anywhere unless
it is requested with the same protocol, from the same port, and on the
same host as the request that initiated your application (see [1]).
If this sounds like your issue (i.e. you are making the request to
GeoServer on a different port than the request for the rest of your
application), see the FAQ on setting up a proxy host [2]. Note that
if you are using the proxy.cgi that comes in the OL examples
directory, you will need to add your host (and port) to the accepted
list (in proxy.cgi).
I'm using a local Geoserver with PostGIS. I would like to know too
how the getFeatureInfo query works.
Like if I have anything I have to do specially into the database. I
figure that it's querying the database for info, but what info?
Do I have to define what I want to be queried? Maybe this is
off-topic here sorry.
Also, use Firebug to watch the requests go out. Copy the request and
paste in to a new tab to make sure you are getting what you expect.
If you don't get what you expect, then you'll have to troubleshoot
your GeoServer configuration.
Hope that helps some,
Tim
[1] http://www.mozilla.org/projects/security/components/same-origin.html
[2] http://trac.openlayers.org/wiki/FrequentlyAskedQuestions#ProxyHost
I searched for informations on the UTIL package for openlayers but
didn't find real documentation about that.
Please let me know if you would like more info.
Any help will be greatly appreciated.
Thanks in advance
/******* CODE START HERE - !!! Note that this code is not complete. I
posted only the parts I found relevant. !!!
function init(){
var map = new OpenLayers.Map($('map'), {controls:[]} );
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 5;
var yahooLayer = new
OpenLayers.Layer.Yahoo( "Globe (Yahoo)", {reproject: "true"} );
map.addLayer(yahooLayer);
var wmsLayer1 = new OpenLayers.Layer.WMS(
"POSTGIS villes",
"http://ulysse.cmc.ec.gc.ca:8081/geoserver/wms";,
{
layers: 'topp:villes',
format: 'image/png' , transparent: "true", reproject:
"true"}
);
map.addLayer(wmsLayer1);
map.addControl(new
OpenLayers.Control.LayerSwitcher());
map.addControl(new OpenLayers.Control.NavToolbar());
map.addControl(new OpenLayers.Control.PanZoomBar($('map')));
map.addControl(new OpenLayers.Control.MouseDefaults());
map.addControl(new OpenLayers.Control.Scale($('scale')));
map.addControl(new
OpenLayers.Control.MousePosition({element: $('position')}));
map.events.register('click', map, function (e) {
OpenLayers.Util.getElement('nodeList').innerHTML =
"<b>Téléchargement d'information...<br> Veuillez Attendre SVP...</b>";
var url = wmsLayer1.getFullRequestString({
REQUEST: "GetFeatureInfo",
EXCEPTIONS: "application/vnd.ogc.se_xml",
BBOX: wmsLayer1.map.getExtent().toBBOX(),
X: e.xy.x,
Y: e.xy.y,
INFO_FORMAT: 'text/html',
QUERY_LAYERS: wmsLayer1.params.LAYERS,
WIDTH: wmsLayer1.map.size.w,
HEIGHT: wmsLayer1.map.size.h});
OpenLayers.loadURL(url, '', this, setHTML);
alert("Checkpoint");
Event.stop(e);
});
}
function setHTML(response) {
alert("before answer");
OpenLayers.Util.getElement('nodeList').innerHTML =
response.responseText;
alert("after answer");
}
/********* CODE STOPS HERE
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