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How to convert jquery ajax to native javascript?

here is my ajaxHandler i want to convert this to native javascript i.e
using XMLHttpRequest but i am unable to understand how to convert.`
ajaxHandler = {
defaultAttributes: {
type: 'GET',
url: 'index.php/request',
datatype: 'json',
data: {},
success: null,
error: function(data) {
errorHandler.showError('An Error occurred while trying to retreive your requested data, Please try again...');
},
timeout: function() {
errorHandler.showError('The request has been timed out, Please check your Internet connection and try again...');
}
},
sendRequest: function(attributes) {
Paper.giffyLoading.style.display = 'block';
if (!attributes.nopopup) {
if (attributes.loadmsg) {
Controllers.AnimationController.createProgressBarScreen(attributes.loadmsg);
attributes.loadmsg = null;
}
}
$.ajax(attributes);
}
}
i have try to convert the above code like this
XMLRequestDefaultHandler = function() {
var xmlHttp = new XMLHttpRequest();
xmlHttp.open('GET', 'index.php/request', true);
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState === 4 || xmlHttp.status === 200) {
} else {
errorHandler.showError('An Error occurred while trying to retreive your requested data, Please try again...');
}
};
xmlHttp.send(null);
}

I extracted ajax function of Jquery, to work without jquery.
And replace $.ajax(attributes); to ajax(attributes);
JQuery's ajax function, without JQuery :
function ajax(option) { // $.ajax(...) without jquery.
if (typeof(option.url) == "undefined") {
try {
option.url = location.href;
} catch(e) {
var ajaxLocation;
ajaxLocation = document.createElement("a");
ajaxLocation.href = "";
option.url = ajaxLocation.href;
}
}
if (typeof(option.type) == "undefined") {
option.type = "GET";
}
if (typeof(option.data) == "undefined") {
option.data = null;
} else {
var data = "";
for (var x in option.data) {
if (data != "") {
data += "&";
}
data += encodeURIComponent(x)+"="+encodeURIComponent(option.data[x]);
};
option.data = data;
}
if (typeof(option.statusCode) == "undefined") { // 4
option.statusCode = {};
}
if (typeof(option.beforeSend) == "undefined") { // 1
option.beforeSend = function () {};
}
if (typeof(option.success) == "undefined") { // 4 et sans erreur
option.success = function () {};
}
if (typeof(option.error) == "undefined") { // 4 et avec erreur
option.error = function () {};
}
if (typeof(option.complete) == "undefined") { // 4
option.complete = function () {};
}
typeof(option.statusCode["404"]);
var xhr = null;
if (window.XMLHttpRequest || window.ActiveXObject) {
if (window.ActiveXObject) { try { xhr = new ActiveXObject("Msxml2.XMLHTTP"); } catch(e) { xhr = new ActiveXObject("Microsoft.XMLHTTP"); } }
else { xhr = new XMLHttpRequest(); }
} else { alert("Votre navigateur ne supporte pas l'objet XMLHTTPRequest..."); return null; }
xhr.onreadystatechange = function() {
if (xhr.readyState == 1) {
option.beforeSend();
}
if (xhr.readyState == 4) {
option.complete(xhr, xhr.status);
if (xhr.status == 200 || xhr.status == 0) {
option.success(xhr.responseText);
} else {
option.error(xhr.status);
if (typeof(option.statusCode[xhr.status]) != "undefined") {
option.statusCode[xhr.status]();
}
}
}
};
if (option.type == "POST") {
xhr.open(option.type, option.url, true);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
xhr.send(option.data);
} else {
xhr.open(option.type, option.url+option.data, true);
xhr.send(null);
}
}

Run one ajax after another one

I'm working on the project where I (sadly) cannot use jQuery. And I need to do something which is simple in jQuery but I cannot do it in pure JavaScript. So, I need to run one ajax request using a response form another one. In jQuery it will look like:
$.get("date.php", "", function(data) {
var date=data;
$("#date").load("doku.php?id="+date.replace(" ", "_")+" #to_display", function() {
$(document.createElement("strong")).html(""+date+":").prependTo($(this));
});
});
And this is my code in pure JS which isn't working:
if (window.XMLHttpRequest)
{
ObiektXMLHttp = new XMLHttpRequest();
} else if (window.ActiveXObject)
{
ObiektXMLHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
if(ObiektXMLHttp)
{
ObiektXMLHttp.open("GET", "date.php");
ObiektXMLHttp.onreadystatechange = function()
{
if (ObiektXMLHttp.readyState == 4)
{
var date = ObiektXMLHttp.responseText;
if (window.XMLHttpRequest)
{
ObiektXMLHttp = new XMLHttpRequest();
} else if (window.ActiveXObject)
{
ObiektXMLHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
ObiektXMLHttp.open("GET", "doku.php?id="+date.replace(" ", "_"));
ObiektXMLHttp.onreadystatechange = function()
{
if (ObiektXMLHttp.readyState == 4)
{
alert(ObiektXMLHttp.responseText);
}
}
}
}
ObiektXMLHttp.send(null);
}
What am I doing worng?

You forgot to call ObiektXMLHttp.send(null); on second case:
//....
ObiektXMLHttp.open("GET", "doku.php?id="+date.replace(" ", "_"));
ObiektXMLHttp.onreadystatechange = function() {
if (ObiektXMLHttp.readyState == 4)
{
alert(ObiektXMLHttp.responseText);
}
};
//Here
ObiektXMLHttp.send(null);

How about something like this (naive prototype):
// xhr object def
var xhr = {
obj: function() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
} else if (window.ActiveXObject) {
return new ActiveXObject("Microsoft.XMLHTTP");
}
throw new Error("can't init xhr object");
},
get: function(url, fn) {
var xhr = this.obj();
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
fn(xhr.responseText);
}
};
xhr.open("GET", url);
xhr.send(null);
}
};
// implementation
xhr.get("date.php", function(data){
xhr.get("doku.php?id=" + data.replace(" ", "_"), function(data){
alert(data);
});
});

It's not clear what you got wrong (can you tell us?), but I'd suggest to rely on some helper function like this:
function xhrGet(url, callback) {
if (window.XMLHttpRequest)
var xhr = new XMLHttpRequest();
else if (window.ActiveXObject)
var xhr = new ActiveXObject("Microsoft.XMLHTTP");
if (!xhr) return;
xhr.open("GET", url);
xhr.onreadystatechange = function() {
if (xhr.readyState !== 4) return;
if (typeof callback === "function") callback(xhr);
};
xhr.send(null);
return xhr;
}
So all you have to do is to use this function:
xhrGet("date.php", function(x1) {
xhrGet("doku.php?id=" + date.replace(" ", "_"), function(x2) {
// do stuff
// x1 and x2 are respectively the XHR object of the two requests
});
});

Getting response from server in javascript

How does I get the response from the server in JavaScript? This is my sample code:
function get_Image(values) {
if (window.XMLHttpRequest) {
var http_request = new XMLHttpRequest();
} else if (window.ActiveXObject) {
var http_request = new ActiveXObject("Microsoft.XMLHTTP");
} else {
http_request.open("GET", "http://sample_address_for_server", true);
http_request.send();
}
alert(http_request.status);
if (http_request.readyState == 4) {
if (http_request.status == 200) {
xmlDoc = http_request.responseText;
alert(xmlDoc);
}
}
}

Try using this block .. the problem with your code is that you missed the quote while creating the open connetion
function get_Image(values){
var http_request = false;
if (window.XMLHttpRequest) {
http_request = new XMLHttpRequest()
} else {
if (window.ActiveXObject) {
try {
http_request = new ActiveXObject("MSXML2.XMLHTTP")
} catch () {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP")
} catch () {}
}
} else {
return false
}
}
http_request.onreadystatechange = function () {
alert(http_request.status);
if ( http_request.readyState == 4 ) {
if ( http_request.status == 200 ) {
xmlDoc = http_request.responseText;
alert(xmlDoc);
}}
};
http_request.open( "GET", "http://sample_address_for_server", true);
http_request.send(null);
}

you have to attach a function to the object's onreadystatechange event. The way you are doing, you are trying to get the response imediately after you sent the request, you don't have any response yet.
function get_Image(values) {
if (window.XMLHttpRequest) {
var http_request = new XMLHttpRequest();
} else if (window.ActiveXObject) {
var http_request = new ActiveXObject("Microsoft.XMLHTTP");
} else {
http_request.open("GET", "http://sample_address_for_server", true);
http_request.send();
}
alert(http_request.status);
http_request.onreadystatechange = function(){
if (http_request.readyState == 4) {
if (http_request.status == 200) {
xmlDoc = http_request.responseText;
alert(xmlDoc);
}
}
}
}

window.onbeforeunload and redirect to root path

I did find some javascript/activex code in a project, called when leaving a page (window.onbeforeunload):
My project is reachable at the address
www.someaddress.itdoesntexists/MyProjectName/page.jsp
When the logout function is called, the action in the page logout.jsp is correctly performed but at the end of the process the user is redirected to
www.someaddress.itdoesntexists
instead of
ww.someaddress.itdoesntexists/MyProjectName/
The code:
<script type="text/javascript">
var loggedout = false;
bVer = parseInt(navigator.appVersion);
bName = navigator.appName;
browserIE = bName == "Microsoft Internet Explorer";
browserNS = bName == "Netscape";
function sendHttpRequestSubmit (http_request, parameters) {
http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http_request.setRequestHeader("Content-length", parameters.length);
http_request.setRequestHeader("Connection", "close");
http_request.send(parameters);
}
function httpRequest(url, mime, callback, async, parameters) {
var http_request = false;
if (window.XMLHttpRequest) { // Mozilla, Safari,...
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) http_request.overrideMimeType(mime);
} else if (window.ActiveXObject) { // IE
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!http_request) {
alert('Unable to create a XMLHTTP instance');
return false;
}
http_request.onreadystatechange = function () {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
if (callback != null) callback(http_request);
} else alert('There is a problem with the request "' + url + '"');
}
}
async = async == null ? true : async;
http_request.open('POST', url, async);
if (parameters != null) sendHttpRequestSubmit(http_request, parameters);
else http_request.send(null);
if (browserNS && !async) {//
if (callback != null) callback(http_request);
}
}
function logout () {
var sg;
if (!loggedout)
httpRequest ("logout.jsp?js=1", "text/javascript", function (http_request) {
sg = eval(http_request.responseText);
}, false);
loggedout = true;
return sg;
}
window.onbeforeunload = logout;
Can someone explain to me where to tell the script that it doesn't have to go to the root path?

The script doesn't directly declare the redirect - it simply handles a response from an AJAX call to logout.jsp?js=1 by evaluating it as a function - I would guess that you'll need to modify that response text (so outside of the script you've posted) to get it to redirect to the location you want.

AJAX Only Javascript Library

I am searching for a Javascript Library Which has only AJAX no other feature. e.g. a Small Simple XMLHttp Wrapper.

microajax is what I settled on.

This is not a library but it is a "Small Simple XMLHttp Wrapper" I made:
//params format:"bob=hi&id=1295&lol=haha"
function ajax_post(post_url,params,success_callback,fail_callback,timeout)
{
var xmlHttp = new XMLHttpRequest();
xmlHttp.open("POST",post_url, true);
xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlHttp.setRequestHeader("Content-length", params.length);
//xmlHttp.setRequestHeader("Connection", "close");
xmlHttp.onreadystatechange=function()
{
if (xmlHttp.readyState == 4 )
{
clearTimeout(xmlHttpTimeout);
if(xmlHttp.status == 200)
{
success_callback();
}
else
{
fail_callback();
}
}
}
xmlHttp.send(params);
var xmlHttpTimeout=setTimeout(ajaxTimeout,timeout);
function ajaxTimeout()
{
xmlHttp.abort();
fail_callback();
}
}
function ajax_get(url,success_callback,fail_callback,timeout)
{
var xmlHttp = new XMLHttpRequest();
xmlHttp.open("GET",url, true);
xmlHttp.onreadystatechange=function()
{
if (xmlHttp.readyState == 4 )
{
clearTimeout(xmlHttpTimeout);
if(xmlHttp.status == 200)
{
success_callback(xmlHttp.responseText);
}
else
{
fail_callback();
}
}
}
xmlHttp.send();
var xmlHttpTimeout=setTimeout(ajaxTimeout,timeout);
function ajaxTimeout()
{
xmlHttp.abort();
fail_callback();
}
}

Here' a small chunk of a JavaScript PHP wrapper I wrote a long time ago when I virtually knew nothing about JavaScript... it barely contains any AJAX methods, just wrapper functions that communicate with a PHP backend in order to allow PHP to do all the work...
In all honesty, to get what it seems you're looking for... just sit down and write yourself an AJAX library with all the common helper functions. It should take you a few hours at the most.
The Javascript:
(function() {
var
PHPJS = window.PHPJS = window.$ = function() {
return new PHPJS.Strings;
};
PHPJS.Strings = PHPJS.prototype = {
InitAJAX: function(Library, ServerString)
{
var ResultCache = document.body;
var FunctionRequest;
try {
FunctionRequest = new XMLHttpRequest();
} catch (e) {
try {
FunctionRequest = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
FunctionRequest = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
throw new Error("The XMLHttpRequest() object is not supported by your browser.")
return false;
}
}
}
FunctionRequest.onreadystatechange = function() {
if (FunctionRequest.readyState == 4 && FunctionRequest.status == 200) {
ResultCache.innerHTML = FunctionRequest.responseText;
return FunctionRequest.responseText;
}
}
switch (Library) {
case 'Arrays' :
FunctionRequest.open("GET", "functions/arrays-lib.php" + ServerString, true);
break;
case 'Math' :
FunctionRequest.open("GET", "functions/math-lib.php" + ServerString, true);
break;
case 'Strings' :
FunctionRequest.open("GET", "functions/strings-lib.php" + ServerString, true);
break;
}
FunctionRequest.send(null);
},
/* String Functions */
addcslashes: function(str, charlist)
{
return this.InitAJAX('Strings','?function=addcslashes&String='+str+'&Charlist='+charlist);
},
addslashes: function(str)
{
return this.InitAJAX('Strings','?function=addslashes&String='+str);
},
bin2hex: function(str)
{
return this.InitAJAX('Strings','?function=bin2hex&String='+str);
},
chop: function(str,charlist)
{
return this.InitAJAX('Strings','?function=chop&String='+str+'&Charlist='+charlist);
},
chr: function(int)
{
return this.InitAJAX('Strings','?function=chr&Int='+int);
},
chunk_split: function(str, chunklen, end)
{
return this.InitAJAX('Strings','?function=chunk_split&String='+str+'&Chunklen='+chunklen+'&End='+end);
},
convert_cyr_string: function(str)
{
return this.InitAJAX('Strings','?function=convert_cyr_string');
},
/* more functions... */
}
})();
//PHPJS.bin2hex('afsdfadsafdsafdasfsaf');
The PHP:
<?php
switch($_GET['function']) {
case 'addcslashes' :
$charlist = (#$_GET['Charlist']) ? ','.$_GET['Charlist'] : '';
echo addcslashes($_GET['String'], $charlist);
break;
case 'addslashes' :
echo addslashes($_GET['String']);
break;
case 'bin2hex' :
echo bin2hex($_GET['String']);
break;
case 'chop' :
$charlist = (#$_GET['Charlist']) ? ','.$_GET['Charlist'] : '';
echo rtrim($_GET['String'], $charlist);
break;
case 'chr' :
echo chr($_GET['Int']);
break;
case 'chunk_split' :
echo chunk_split($_GET['String'], #$_GET['Chunklen'], #$_GET['End']);
break;
/** ...etc, etc... **/
?>