Can't Get Simple XMLHttpRequest To Work In FF1.0.7
Mar 10, 2006
The following script works fine in IE6. In FF 1.0.7, it doesn't display the response text. The alert()'s in the script show that:
1) the script successfully creates the request object
2) 'http_request.status' starts off equal to 0
3) the readystate displays: 1, 1, 2, 4
4) an error occurs when the script tries to access the .status property of the request object after the request has been sent and the readyState reaches 4(line marked in red below).
<html>
<head><title></title>
<script type="text/javascript" language="javascript">
function makeRequest(url)
{
var http_request = false;
if (window.XMLHttpRequest)
{ // Mozilla, Safari,...
http_request = new XMLHttpRequest();
alert(http_request); //object XMLHttpRequest
alert("status: " + http_request.status); //status: 0
/*
alert("overriding mime type");
http_request.overrideMimeType('text/xml');
*/
}
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('Giving up :( Cannot create an XMLHTTP instance');
return false;
}
http_request.onreadystatechange = function() { alertContents(http_request); };
http_request.open('GET', url, true);
http_request.send(null);
}
function alertContents(http_request)
{
alert(http_request.readyState);
if (http_request.readyState == 4)
{
ERROR ---> if(http_request.status) alert("status property exists");
else alert("no status property");
if (http_request.status == "200")
{
alert(http_request.responseText);
}
else
{
alert('There was a problem with the request.');
}
}
}
</script>
</head>
<body>
<div><a href="" onclick="makeRequest('someText.txt')">click me</a></div>
</body>
</html>
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Sep 8, 2005
I am having a problem using the XMLHTTPRequest, is something wrong in my code? How do you post data, I tried this but the PHP does not receibe any posted information, like if nothing was sended, i try this with Firefox 1.0.6 on Linux Fedora Core 3, thanks in advance for any ideas...., could it be some kind of firefox implementation bug? Code:
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Here's my problem code:
document.onclick=handler;
function handler(e) {
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[Code]....
Now is user clicks something else but not a link everything works just fine. But if she clicks a link, the bar.php call does not work (never comes to the server). If I change the call to a synchronuous one request.open("GET", [URL] false) also clicking a link works fine. But I would of course prefer the async way.
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Code:
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I spent 2 hours trying everything, but I still can't get it to work.
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<head>
<title>Hi</title>
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Why won't this work?
Nothing pops up for the alert.
<script type="text/javascript">
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Mar 13, 2005
Yesterday I started rewriting the xmlhttprequest functions to an oo equivalent, but as it turns out, I don't get it right:
Code:
function Request()
{
this.req=init();
this.req.onreadystatechange = this.processedRequest;
//addEventHandler/attachEvent alternative
//doesn't work either
function init()
{
try
{
if(window.XMLHttpRequest)
return new XMLHttpRequest();
else
return new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e)
{
alert(e);
}
}
}
Request.prototype.send=function(url)
{
this.req.open("GET", url, true);
this.req.send(null);
}
Request.prototype.processedRequest=function()
{
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if(this.req.status == 200)
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res=response.getElementsByTagName('result')[0].firstChild.data;
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eval(func+'('+result+')');
}
else
{
alert(this.req.statusText);
}
}
}
expected usage:
Code:
var x=new Request();
x.send(url); //the processing function
//the eventtrigger should activate the callback function
//when the xml has been returned
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Jul 6, 2010
1. - I am new to this
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Code:
function makeObject(){
var x;
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}else if (window.XMLHttpRequest) {
x = new XMLHttpRequest();
}
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Apr 24, 2005
function XML_request(func) {
var onreadystatechange= func;
this.method = "GET";
this.get = function(url) {
var request = null;
var state_change = function() {
if (request.readyState==4) {
if (request.status==200) {
onreadystatechange(request);
} else {
return null;
}
}
}
try {
request = new XMLHttpRequest();
} catch(e) {
try {
request = new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
return null;
}
}
if (request===null) {
return null;
}
request.onreadystatechange = state_change;
request.open(this.method, url, true);
request.send(null);
}
}
var req = new XML_request(function(response) {
response = response.responseXML
alert(response.getElementsByTagName('blah')[0].firstChild.data);
});
req.get('index.php?mode=blah&a=response')
i didn't like the examples I found so this is suitable.. I only tested in ie and firefox though.. so let me know what I may be missing.. or criticism in general.
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