Add JSON parser and exporter, to allow people to more safely parse and use JSON in their OpenLayers applications.
git-svn-id: http://svn.openlayers.org/trunk/openlayers@986 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
@@ -1,110 +1,110 @@
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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 = "/proxy/?url=";
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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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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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// 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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OpenLayers.ProxyHost = "/proxy/?url=";
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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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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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// 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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/** Adds a new script element to the head of the current document,
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@@ -117,4 +117,105 @@ OpenLayers.addScript = function(url) {
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var scriptElem = document.createElement("script");
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scriptElem.src = url;
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head.appendChild(scriptElem);
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};
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};
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(function () {
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var m = {
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'\b': '\\b',
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'\t': '\\t',
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'\n': '\\n',
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'\f': '\\f',
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'\r': '\\r',
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'"' : '\\"',
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'\\': '\\\\'
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},
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s = {
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array: function (x) {
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var a = ['['], b, f, i, l = x.length, v;
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for (i = 0; i < l; i += 1) {
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v = x[i];
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f = s[typeof v];
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if (f) {
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v = f(v);
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if (typeof v == 'string') {
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if (b) {
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a[a.length] = ',';
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}
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a[a.length] = v;
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b = true;
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}
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}
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}
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a[a.length] = ']';
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return a.join('');
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},
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'boolean': function (x) {
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return String(x);
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},
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'null': function (x) {
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return "null";
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},
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number: function (x) {
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return isFinite(x) ? String(x) : 'null';
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},
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object: function (x) {
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if (x) {
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if (x instanceof Array) {
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return s.array(x);
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}
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var a = ['{'], b, f, i, v;
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for (i in x) {
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v = x[i];
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f = s[typeof v];
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if (f) {
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v = f(v);
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if (typeof v == 'string') {
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if (b) {
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a[a.length] = ',';
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}
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a.push(s.string(i), ':', v);
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b = true;
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}
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}
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}
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a[a.length] = '}';
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return a.join('');
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}
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return 'null';
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},
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string: function (x) {
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if (/["\\\x00-\x1f]/.test(x)) {
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x = x.replace(/([\x00-\x1f\\"])/g, function(a, b) {
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var c = m[b];
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if (c) {
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return c;
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}
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c = b.charCodeAt();
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return '\\u00' +
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Math.floor(c / 16).toString(16) +
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(c % 16).toString(16);
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});
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}
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return '"' + x + '"';
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}
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};
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Object.prototype.toJSONString = function () {
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return s.object(this);
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};
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Array.prototype.toJSONString = function () {
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return s.array(this);
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};
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})();
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String.prototype.parseJSON = function () {
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try {
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return !(/[^,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]/.test(
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this.replace(/"(\\.|[^"\\])*"/g, ''))) &&
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eval('(' + this + ')');
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} catch (e) {
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return false;
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}
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};
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