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/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/license.txt for the full
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* text of the license. */
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OpenLayers.ProxyHost = "";
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//OpenLayers.ProxyHost = "examples/proxy.cgi?url=";
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/**
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* Ajax reader for OpenLayers
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*
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*@uri url to do remote XML http get
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*@param 'get' format params (x=y&a=b...)
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*@who object to handle callbacks for this request
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*@complete the function to be called on success
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*@failure the function to be called on failure
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*
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* example usage from a caller:
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*
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* caps: function(request) {
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* -blah-
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* },
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*
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* OpenLayers.loadURL(url,params,this,caps);
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*
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* Notice the above example does not provide an error handler; a default empty
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* handler is provided which merely logs the error if a failure handler is not
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* supplied
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*
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*/
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/**
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* @param {} request
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*/
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OpenLayers.nullHandler = function(request) {
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alert("Unhandled request return " + request.statusText);
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};
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/** Background load a document
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*
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* @param {String} uri URI of source doc
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* @param {String} params Params on get (doesnt seem to work)
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* @param {Object} caller object which gets callbacks
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* @param {Function} onComplete callback for success
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* @param {Function} onFailure callback for failure
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*
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* Both callbacks optional (though silly)
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*/
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OpenLayers.loadURL = function(uri, params, caller,
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onComplete, onFailure) {
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51
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if (OpenLayers.ProxyHost && uri.startsWith("http")) {
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uri = OpenLayers.ProxyHost + escape(uri);
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}
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var success = (onComplete) ? onComplete.bind(caller)
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: OpenLayers.nullHandler;
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var failure = (onFailure) ? onFailure.bind(caller)
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: OpenLayers.nullHandler;
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61
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// from prototype.js
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new Ajax.Request(uri,
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{ method: 'get',
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parameters: params,
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onComplete: success,
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onFailure: failure
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}
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);
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};
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/** Parse XML into a doc structure
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* @param {String} text
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*
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* @returns Parsed Ajax Response ??
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* @type ?
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*/
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OpenLayers.parseXMLString = function(text) {
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//MS sucks, if the server is bad it dies
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var index = text.indexOf('<');
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if (index > 0) {
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text = text.substring(index);
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}
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var ajaxResponse = Try.these(
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function() {
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var xmldom = new ActiveXObject('Microsoft.XMLDOM');
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xmldom.loadXML(text);
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return xmldom;
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},
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function() {
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return new DOMParser().parseFromString(text, 'text/xml');
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},
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function() {
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var req = new XMLHttpRequest();
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req.open("GET", "data:" + "text/xml" +
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";charset=utf-8," + encodeURIComponent(text), false);
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if (req.overrideMimeType) {
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req.overrideMimeType("text/xml");
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}
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req.send(null);
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return req.responseXML;
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}
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);
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return ajaxResponse;
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};
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