606991fc0d
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.3-rc1@2106 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
309 lines
8.7 KiB
JavaScript
309 lines
8.7 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
|
|
* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
|
|
* for the full text of the license. */
|
|
|
|
|
|
OpenLayers.ProxyHost = "";
|
|
//OpenLayers.ProxyHost = "examples/proxy.cgi?url=";
|
|
|
|
/**
|
|
* Ajax reader for OpenLayers
|
|
*
|
|
*@uri url to do remote XML http get
|
|
*@param 'get' format params (x=y&a=b...)
|
|
*@who object to handle callbacks for this request
|
|
*@complete the function to be called on success
|
|
*@failure the function to be called on failure
|
|
*
|
|
* example usage from a caller:
|
|
*
|
|
* caps: function(request) {
|
|
* -blah-
|
|
* },
|
|
*
|
|
* OpenLayers.loadURL(url,params,this,caps);
|
|
*
|
|
* Notice the above example does not provide an error handler; a default empty
|
|
* handler is provided which merely logs the error if a failure handler is not
|
|
* supplied
|
|
*
|
|
*/
|
|
|
|
|
|
/**
|
|
* @param {} request
|
|
*/
|
|
OpenLayers.nullHandler = function(request) {
|
|
alert("Unhandled request return " + request.statusText);
|
|
};
|
|
|
|
/** Background load a document
|
|
*
|
|
* @param {String} uri URI of source doc
|
|
* @param {String} params Params on get (doesnt seem to work)
|
|
* @param {Object} caller object which gets callbacks
|
|
* @param {Function} onComplete callback for success
|
|
* @param {Function} onFailure callback for failure
|
|
*
|
|
* Both callbacks optional (though silly)
|
|
*/
|
|
OpenLayers.loadURL = function(uri, params, caller,
|
|
onComplete, onFailure) {
|
|
|
|
if (OpenLayers.ProxyHost && uri.startsWith("http")) {
|
|
uri = OpenLayers.ProxyHost + escape(uri);
|
|
}
|
|
|
|
var success = (onComplete) ? onComplete.bind(caller)
|
|
: OpenLayers.nullHandler;
|
|
|
|
var failure = (onFailure) ? onFailure.bind(caller)
|
|
: OpenLayers.nullHandler;
|
|
|
|
// from prototype.js
|
|
new OpenLayers.Ajax.Request(uri,
|
|
{ method: 'get',
|
|
parameters: params,
|
|
onComplete: success,
|
|
onFailure: failure
|
|
}
|
|
);
|
|
};
|
|
|
|
/** Parse XML into a doc structure
|
|
* @param {String} text
|
|
*
|
|
* @returns Parsed Ajax Response ??
|
|
* @type ?
|
|
*/
|
|
OpenLayers.parseXMLString = function(text) {
|
|
|
|
//MS sucks, if the server is bad it dies
|
|
var index = text.indexOf('<');
|
|
if (index > 0) {
|
|
text = text.substring(index);
|
|
}
|
|
|
|
var ajaxResponse = OpenLayers.Util.Try(
|
|
function() {
|
|
var xmldom = new ActiveXObject('Microsoft.XMLDOM');
|
|
xmldom.loadXML(text);
|
|
return xmldom;
|
|
},
|
|
function() {
|
|
return new DOMParser().parseFromString(text, 'text/xml');
|
|
},
|
|
function() {
|
|
var req = new XMLHttpRequest();
|
|
req.open("GET", "data:" + "text/xml" +
|
|
";charset=utf-8," + encodeURIComponent(text), false);
|
|
if (req.overrideMimeType) {
|
|
req.overrideMimeType("text/xml");
|
|
}
|
|
req.send(null);
|
|
return req.responseXML;
|
|
}
|
|
);
|
|
|
|
return ajaxResponse;
|
|
};
|
|
|
|
OpenLayers.Ajax = {
|
|
emptyFunction: function () {},
|
|
|
|
getTransport: function() {
|
|
return OpenLayers.Util.Try(
|
|
function() {return new ActiveXObject('Msxml2.XMLHTTP')},
|
|
function() {return new ActiveXObject('Microsoft.XMLHTTP')},
|
|
function() {return new XMLHttpRequest()}
|
|
) || false;
|
|
},
|
|
|
|
activeRequestCount: 0
|
|
};
|
|
|
|
OpenLayers.Ajax.Responders = {
|
|
responders: [],
|
|
|
|
register: function(responderToAdd) {
|
|
for (var i = 0; i < this.responders.length; i++)
|
|
if (responderToAdd == this.responders[i])
|
|
return;
|
|
this.responders.push(responderToAdd);
|
|
},
|
|
|
|
dispatch: function(callback, request, transport, json) {
|
|
for (var i = 0; i < this.responders.length; i++) {
|
|
responder = this.responders[i];
|
|
if (responder[callback] && typeof responder[callback] == 'function') {
|
|
try {
|
|
responder[callback].apply(responder, [request, transport, json]);
|
|
} catch (e) {}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
OpenLayers.Ajax.Responders.register({
|
|
onCreate: function() {
|
|
OpenLayers.Ajax.activeRequestCount++;
|
|
},
|
|
|
|
onComplete: function() {
|
|
OpenLayers.Ajax.activeRequestCount--;
|
|
}
|
|
});
|
|
|
|
OpenLayers.Ajax.Base = function() {};
|
|
OpenLayers.Ajax.Base.prototype = {
|
|
setOptions: function(options) {
|
|
this.options = {
|
|
method: 'post',
|
|
asynchronous: true,
|
|
parameters: ''
|
|
}
|
|
OpenLayers.Util.extend(this.options, options || {});
|
|
},
|
|
|
|
responseIsSuccess: function() {
|
|
return this.transport.status == undefined
|
|
|| this.transport.status == 0
|
|
|| (this.transport.status >= 200 && this.transport.status < 300);
|
|
},
|
|
|
|
responseIsFailure: function() {
|
|
return !this.responseIsSuccess();
|
|
}
|
|
}
|
|
|
|
OpenLayers.Ajax.Request = OpenLayers.Class.create();
|
|
OpenLayers.Ajax.Request.Events =
|
|
['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
|
|
|
|
OpenLayers.Ajax.Request.prototype = OpenLayers.Class.inherit( OpenLayers.Ajax.Base, {
|
|
initialize: function(url, options) {
|
|
this.transport = OpenLayers.Ajax.getTransport();
|
|
this.setOptions(options);
|
|
this.request(url);
|
|
},
|
|
|
|
request: function(url) {
|
|
var parameters = this.options.parameters || '';
|
|
if (parameters.length > 0) parameters += '&_=';
|
|
|
|
try {
|
|
this.url = url;
|
|
if (this.options.method == 'get' && parameters.length > 0)
|
|
this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;
|
|
|
|
OpenLayers.Ajax.Responders.dispatch('onCreate', this, this.transport);
|
|
|
|
this.transport.open(this.options.method, this.url,
|
|
this.options.asynchronous);
|
|
|
|
if (this.options.asynchronous) {
|
|
this.transport.onreadystatechange = this.onStateChange.bind(this);
|
|
setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10);
|
|
}
|
|
|
|
this.setRequestHeaders();
|
|
|
|
var body = this.options.postBody ? this.options.postBody : parameters;
|
|
this.transport.send(this.options.method == 'post' ? body : null);
|
|
|
|
} catch (e) {
|
|
this.dispatchException(e);
|
|
}
|
|
},
|
|
|
|
setRequestHeaders: function() {
|
|
var requestHeaders =
|
|
['X-Requested-With', 'XMLHttpRequest',
|
|
'X-Prototype-Version', 'OpenLayers'];
|
|
|
|
if (this.options.method == 'post') {
|
|
requestHeaders.push('Content-type',
|
|
'application/x-www-form-urlencoded');
|
|
|
|
/* Force "Connection: close" for Mozilla browsers to work around
|
|
* a bug where XMLHttpReqeuest sends an incorrect Content-length
|
|
* header. See Mozilla Bugzilla #246651.
|
|
*/
|
|
if (this.transport.overrideMimeType)
|
|
requestHeaders.push('Connection', 'close');
|
|
}
|
|
|
|
if (this.options.requestHeaders)
|
|
requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);
|
|
|
|
for (var i = 0; i < requestHeaders.length; i += 2)
|
|
this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);
|
|
},
|
|
|
|
onStateChange: function() {
|
|
var readyState = this.transport.readyState;
|
|
if (readyState != 1)
|
|
this.respondToReadyState(this.transport.readyState);
|
|
},
|
|
|
|
header: function(name) {
|
|
try {
|
|
return this.transport.getResponseHeader(name);
|
|
} catch (e) {}
|
|
},
|
|
|
|
evalJSON: function() {
|
|
try {
|
|
return eval(this.header('X-JSON'));
|
|
} catch (e) {}
|
|
},
|
|
|
|
evalResponse: function() {
|
|
try {
|
|
return eval(this.transport.responseText);
|
|
} catch (e) {
|
|
this.dispatchException(e);
|
|
}
|
|
},
|
|
|
|
respondToReadyState: function(readyState) {
|
|
var event = OpenLayers.Ajax.Request.Events[readyState];
|
|
var transport = this.transport, json = this.evalJSON();
|
|
|
|
if (event == 'Complete') {
|
|
try {
|
|
(this.options['on' + this.transport.status]
|
|
|| this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
|
|
|| OpenLayers.Ajax.emptyFunction)(transport, json);
|
|
} catch (e) {
|
|
this.dispatchException(e);
|
|
}
|
|
|
|
if ((this.header('Content-type') || '').match(/^text\/javascript/i))
|
|
this.evalResponse();
|
|
}
|
|
|
|
try {
|
|
(this.options['on' + event] || OpenLayers.Ajax.emptyFunction)(transport, json);
|
|
OpenLayers.Ajax.Responders.dispatch('on' + event, this, transport, json);
|
|
} catch (e) {
|
|
this.dispatchException(e);
|
|
}
|
|
|
|
/* Avoid memory leak in MSIE: clean up the oncomplete event handler */
|
|
if (event == 'Complete')
|
|
this.transport.onreadystatechange = OpenLayers.Ajax.emptyFunction;
|
|
},
|
|
|
|
dispatchException: function(exception) {
|
|
(this.options.onException || OpenLayers.Ajax.emptyFunction)(this, exception);
|
|
OpenLayers.Ajax.Responders.dispatch('onException', this, exception);
|
|
}
|
|
});
|
|
|
|
OpenLayers.Ajax.getElementsByTagNameNS = function(parentnode, nsuri, nsprefix, tagname) {
|
|
return parentnode.getElementsByTagNameNS ?
|
|
parentnode.getElementsByTagNameNS(nsuri, tagname)
|
|
: parentnode.getElementsByTagName(nsprefix + ':' + tagname);
|
|
}
|