I have a problem with the following code.
When I run it in IE8, I get an alert when I have a successful return from the call.
This does not happen in Firefox and Chrome, i.e. I get no alert when running it there.
Everything else works, except that it seems to me like the code section which is supposed to execute once the call is successful fails.
function stuffFile(file, wfid) {
var xmlhttp = new XMLHttpRequest();
if(window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
var url = "http://someotherserver.page.aspx";
var params = "fileName=" + file + "¶m11=" + wfid;
xmlhttp.open("POST", url, true);
//Send the proper header information along with the request
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.setRequestHeader("Content-length", params.length);
xmlhttp.setRequestHeader("Connection", "close");
xmlhttp.onreadystatechange = function() {//Call a function when the state changes.
//alert('onready');
if(xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var response = jQuery.trim(xmlhttp.responseText);
alert('response ' + response);
}
}
xmlhttp.send(params);
}
You're already using jQuery, you should use its AJAX capabilities. It takes care of creating the XMLHTTPRequest object and all the differences between different browsers, and does a lot of the stuff you are doing manually.
Related
I done a ajax call to local http server but I got error in xmlhttp.open("GET", "http://localhost//push", true); incorrect function in IE 11, Below is my full code:
var xmlhttp;
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
....some code.....
}}
}
xmlhttp.open("GET", "http://localhost//push", true);
xmlhttp.send();
}
IE uses new XMLHttpRequest();
Finally i got the answer very silly issue, In chrome URL can be "http://localhost//push" but in IE it should have backslash instead of forward slash "http:\\localhost\\push" or else it will show incorrect function
I am working on a webpage that needs to store data on the server in a .json file.
Here is what I have tried so far:
Javascript code:
// variable j = our json
var j;
function loadDoc(){
var xmlhttp;
if (window.XMLHttpRequest){// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
j = xmlhttp.responseText;
}
}
xmlhttp.open("GET","things.json",true);
xmlhttp.send();
}
loadDoc();
function rewrite(){
var xhr;
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
xhr = new XMLHttpRequest();
} else if (window.ActiveXObject) { // IE 8 and older
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
xhr.onreadystatechange = function(){
if(xhr.readyState == 4){
};
};
xhr.open("POST", "write.php", true);
xhr.send("data=" + j);
};
The PHP file:
<?php
$data = $_POST['data'];
file_put_contents('things.json', $data);
?>
Note, in other parts of my code the j variable is changed.
My problem is that after the PHP script is making the JSON file blank. Am I doing anything wrong? Is php receiving the JSON properly? If so, how can I fix that?
Cheers!
If you vote down, please tell me why.
To POST data like an HTML form, add an HTTP header with setRequestHeader(). (w3school page)
so it must be :
xmlhttp.setRequestHeader("Content-type","application/json");
I am new to JavaScript. In this first i sent successfully some data as a parameters in xmlhttprequest post method. But after that i am trying to send Image as a parameter but this time the post method fails.Here i am using content-type as a multipart/form-data
I am successfully sent image as a parameter in post method.But this time i used <form> tag.
Please any one tell me about this? why my first procedure fails?
function store(){
var pname=document.getElementById("pname").value;
var price=document.getElementById("price").value;
var discount=document.getElementById("discount").value;
var desc=document.getElementById("desc").value;
var heading=document.getElementById("heading").value;
var image=document.getElementById("image").value;
var params="pname="+pname+"&price="+price+"&discount="+discount+"&desc="+desc+"&heading="+heading+"&image="+image;
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
var txt=xmlhttp.responseText;
var obj = eval ("(" + txt + ")");
if(obj.success)
{
userlogin(obj.username,obj.password);
}
else
document.location.href="Userregistration.jsp";
//document.getElementById("countryname").innerHTML=obj.CurrencyById[0].country;
alert("Registered");
}
}
xmlhttp.open("POST","Newproduct",true);
xmlhttp.setRequestHeader("Content-type", "multipart/form-data");
xmlhttp.send(params);
}
I am calling a asmx web service like this
var xmlhttp;
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4) {
var data = xmlhttp.responseText;
var xmlDoc = xmlhttp.responseXML;
}
}
xmlhttp.open("GET", "https://Service/ServiceName.asmx/method?query=data1&count=1",true);
xmlhttp.setRequestHeader('Content-Type', 'text/xml');
xmlhttp.send();
even after the readystate being 4, I get responseXML as null and responseText as empty. whereas the url
"https://Service/ServiceName.asmx/method?query=data1&count=1"
works perfectly in the browser.
Please help.
Use a relative path:
with(new XMLHttpRequest)
{
open("GET","/Service/ServiceName.asmx/method?query=data1&count=1",true);
setRequestHeader("Foo", "Bar");
send("");
onreadystatechange = handler;
}
function handler(event)
{
!!event.target && !!event.target.readyState && event.target.readyState === 4 && ( console.log(event) );
}
If that doesn't work, try loading the URL from JavaScript to check for routing issues:
window.location = "/Service/ServiceName.asmx/method?query=data1&count=1"
Hello I want to get xml from Google Weather
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp= new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET", "http://www.google.com/ig/api?weather=london&hl=en", true);
xmlhttp.send(null);
xmlDoc=xmlhttp.responseXML;
It`s not working . Thanks
XMLHttpRequest is asynchronous. You need to use a callback. If you don't want to use a full-fledged library, I recommend using Quirksmode's XHR wrapper:
function callback(xhr)
{
xmlDoc = xhr.responseXML;
// further XML processing here
}
sendRequest('http://www.google.com/ig/api?weather=london&hl=en', callback);
If you absolutely insist on implementing this yourself:
// callback is the same as above
var xmlhttp;
if (window.XMLHttpRequest)
{
xmlhttp = new XMLHttpRequest();
}
else
{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET", "http://www.google.com/ig/api?weather=london&hl=en", true);
xmlhttp.onreadystatechange = function ()
{
if (xmlhttp.readyState != 4) return;
if (xmlhttp.status != 200 && xmlhttp.status != 304) return;
callback(xmlhttp);
};
xmlhttp.send(null);
Edit
As #remi commented:
I think you'll get a cross domain access exception : you can't make an ajax request to an other domain than your page's. no ?
Which is (for the most part) correct. You'll need to use a server-side proxy, or whatever API that Google provides, instead of a regular XHR.
You can't do this via javascript to to it being a cross-domain request. You'd have to do this server-side.
In PHP you'd use CURL.
What you are trying to do can't be done with Javascript.
Ok here is the code :
<html>
<body>
<script type="text/javascript">
var xmlhttp;
var xmlDoc;
function callback(xhr)
{
xmlDoc = xhr.responseXML;
// further XML processing here
}
if (window.XMLHttpRequest)
{
xmlhttp = new XMLHttpRequest();
}
else
{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET", "http://www.google.com/ig/api?weather=london&hl=en", true);
xmlhttp.onreadystatechange = function ()
{
if (xmlhttp.readyState != 4) return;
if (xmlhttp.status != 200 && xmlhttp.status != 304) return;
callback(xmlhttp);
};
xmlhttp.send(null);
alert(xmlDoc);
</script>
</body>
</html>
It doesn`t returns any errors but alert returns undefined.