I havent heard of one. Its only Javascript at the end of the day! Here are
some methods I have in an ajax.js and some example code to invoke the code.
ajax.js
/**
* Returns an XMLHttpRequest object based on the client platform
*/
function getXMLHttpRequest() {
var newRequest = null;
if (window.XMLHttpRequest) {
// Non-IE browsers
newRequest = new XMLHttpRequest();
} else if (window.ActiveXObject) {
// IE
newRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
return newRequest;
}
/**
* Indicates if the request is of a ready state
*/
function isResponseReady() {
return request.readyState == 4;
}
function ifHttpStatusOK() {
return request.status == 200;
}
function getResponseText() {
return request.responseText;
}
function getResponseXML() {
return request.responseXML;
}
function getResponseStatusText() {
return request.statusText;
}
/**
* The global variable request object
*/
var request = null;
/**
* Returns a response for the requested url.
*/
function getResponseForRequestUrl(url, method) {
request = getXMLHttpRequest();
request.onreadystatechange = method;
try {
request.open("GET", url, true);
if (window.ActiveXObject) {
// IE
request.send();
}
} catch (e) {
// @TODO Log the issue
alert(e);
}
if (window.XMLHttpRequest) {
// Non-IE browsers
request.send(null);
}
}
function invokeRequestUrl(url) {
getResponseForRequestUrl(url, function() {});
}
example client side code.
// Load the Shop categories document
getResponseForRequestUrl('/ajax/shop_module/preferences/kelkoo.do?dispatch=loadShopCategories',
shopCategoriesReturned);
/**
* Invoked when the Shop categories have been returned
*/
function shopCategoriesReturned() {
if (isResponseReady()) {
// At this point the response will be ready
if (!ifHttpStatusOK()) {
// @TODO Log the issue
var statusText = getResponseStatusText();
} else {
// Correct response
var shopNavigationDocument = getResponseXML();
// Now work with the document
}
}
}
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