I'm having difficulties loading a GML file into OpenLayers. I've stripped down the problem to the following : - copy/past the example at : http://openlayers.org/dev/examples/behavior-fixed-http-gml.html - replace all links to absolute
This results in the following file/code that I run from localhost (file:///) :
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<title>OpenLayers Vector Behavior Example</title>
<link rel="stylesheet" href="http://openlayers.org/dev/theme/default/style.css" type="text/css" />
<link rel="stylesheet" href="http://openlayers.org/dev/examples/style.css" type="text/css" />
<script src="http://openlayers.org/dev/OpenLayers.js"></script>
<script type="text/javascript">
var map;
function init(){
map = new OpenLayers.Map('map');
var wms = new OpenLayers.Layer.WMS(
"OpenLayers WMS", "http://vmap0.tiles.osgeo.org/wms/vmap0",
{layers: 'basic'}
);
var layer = new OpenLayers.Layer.Vector("GML", {
strategies: [new OpenLayers.Strategy.Fixed()],
protocol: new OpenLayers.Protocol.HTTP({
url: "http://openlayers.org/dev/examples/gml/polygon.xml",
format: new OpenLayers.Format.GML()
})
});
map.addLayers([wms, layer]);
map.zoomToExtent(new OpenLayers.Bounds(
-3.92, 44.34, 4.87, 49.55
));
}
</script>
</head>
<body onload="init()">
<h1 id="title">Vector Behavior Example (Fixed/HTTP/GML)</h1>
<div id="tags">
vector, strategy, strategies, protocoll, advanced, gml, http, fixed
</div>
<p id="shortdesc">
Vector layer with a Fixed strategy, HTTP protocol, and GML format.
</p>
<div id="map" class="smallmap"></div>
<div id="docs">
The vector layer shown uses the Fixed strategy, the HTTP protocol,
and the GML format.
The Fixed strategy is a simple strategy that fetches features once
and never re-requests new data.
The HTTP protocol makes requests using HTTP verbs. It should be
constructed with a url that corresponds to a collection of features
(a resource on some server).
The GML format is used to serialize features.
</div>
</body>
</html>
The problem is that the GML is not displayed (everything else works great). I have no errors in the console but status 200 OK for the request (both in FF console and FireBug Network tab). What I am missing? Same origin policy failure should show up some error, no?
It does give an Access-Control-Allow-Origin error in Chrome.
XMLHttpRequest cannot load http://openlayers.org/dev/examples/gml/polygon.xml. Origin http://fiddle.jshell.net is not allowed by Access-Control-Allow-Origin.
For FF it does give a 200 response code as you stated, but the response contains no data.