I want to send request parameters to other domain
I already know that Cross Scripting needs JsonP and I have used JsonP with Jquery ajax
but i do not figure out how to do Cross Scripting as using XMLHttpRequest
following code my basic XMLHttpRequest code.
i guess i need to chage xhr.setRequestHeader()
and i have to add parsing code
please give me any idea
var xhr;
function createXMLHttpRequest(){
if(window.AtiveXObject){
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}else{
xhr = new XMLHttpRequest();
}
var url = "http://www.helloword.com";
}
function openRequest(){
createXMLHttpRequest();
xhr.onreadystatechange = getdata;
xhr.open("POST",url,true);
xhr.setRequestHeader("Content-Type",'application/x-www-form-urlencoded');
xhr.send(data);
}
function getdata(){
if(xhr.readyState==4){
if(xhr.status==200){
var txt = xhr.responseText;
alert(txt);
}
}
}
JSONP does not use XMLHttpRequests.
The reason JSONP is used is to overcome cross-origin restrictions of XHRs.
Instead, the data is retrieved via a script.
function jsonp(url, callback) {
var callbackName = 'jsonp_callback_' + Math.round(100000 * Math.random());
window[callbackName] = function(data) {
delete window[callbackName];
document.body.removeChild(script);
callback(data);
};
var script = document.createElement('script');
script.src = url + (url.indexOf('?') >= 0 ? '&' : '?') + 'callback=' + callbackName;
document.body.appendChild(script);
}
jsonp('http://www.helloword.com', function(data) {
alert(data);
});
In interest of simplicity, this does not include error handling if the request fails. Use script.onerror
if you need that.