AJAX :: Reading XMLHttpRequest.responseXML?
Feb 8, 2009
I am trying to build a very simple Ajax example with JavaScript and PHP. Basically, the goal is to populate a select list with values dependent on the selection in another list. I am able to do a GET from a server-side script and I see the XML displayed correctly in XMLHttpRequest.responseText. However, when I try to check XMLHttpRequest.responseXML, I am not able to get anything out of it. The alert() shows it as an "Object", so it's not null. I have tried getElementByTagName() from both responseXML and responseXML.documentElement, each time giving a legitimate inner tag, but nothing comes out. What is the correct way of doing it? This is my JavaScript and HTML code:
[Code]...
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Jun 9, 2006
I stumbled upon a strange behaviour of the XMLHttpRequest.. Maybe I'm
just not well informed enough about its possibilities, so could someone
please confirm my question?
When I put plain javscript in a file that is read-in through a
XMLHttpRequest-object, it's like it is totally ignored. Eg. I have the
file ajax_include.html with in it's body the following lines
<script type="text/javascript" language="javascript">
alert('some alert');
</script>
when I directly surf to the file, the alert pops up as expected, but
when I use a simple XMLHttpRequest to replace the contents of a div
with the contents of this page, the alert is not popping up, although
when I view the selection's source (Thank you, Firefox!), it is there!
When I place an anchor with an onclick-action (eg. alert('onclick')),
it works when I click it.
So my "conclusion" is that it seems like inline javascript commands are
ignored (functions not recognized etc.). All actions assigned to other
events work nice though.
Can someone confirm this strange behaviour? Or is it just normal with
the use of an XMLHttpRequest opbject?
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Jul 12, 2011
I'm not getting any response for the following ajax request. I'm getting the following error when i try to run request_get_xml.html im mozilla firefox:
XML Parsing Error: not well-formed Location: moz-nullprincipal:{d4e6a0fb-93c0-4ef4-82cf-7ccbd5c1e02e} Line Number 4, Column 2:
-<CATALOG>
request_get_xml.html
<script type="text/javascript">
function loadXMLDoc()[code].....
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Sep 27, 2010
It is day two of the same problem (and day two of learning Ajax, day five of Javascript)
The current code (below) does nothing; it does not go into the showContents function. Switching the order of some items would cause it to enter the function, but it would always alert that the xhr status was 0. I guess this is an improvement?
php doc that is getting requested (I don't think the error is here as the problem is that it is not even initializing):
Code:
javascript code that is requesting the information:
Code:
I need to pass the num variable because the fields I am dealing with are part of a bunch of fors that create an unspecified number of fields titled 1source, 2source, 3source, etc.
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Mar 23, 2006
I'd like to create a slideshow using the same technology that Google Maps uses:
Load/unload images offscreen and the user can drag the images around.....
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Jan 15, 2011
My app recently upgraded to 1.4 and as such started using the XMLHttpRequest in the success callback of the .ajax function however we been forced to roll back to 1.3.2 due to performance issues with IE7 (forced to use in a corporate environment) Is there any way to get access to the XMLHttpRequest after an ajax call? If not, would anyone be so kind as to point out if its possible to modify the 1.3.2 source to add the parameter to the success call back like in 1.4? I am hoping its a simple modification however I could be wrong. We are set to upgrade to the lastest jQuery when we get a browser upgrade to IE9 but that could be up to a year away and I would really like to continue to use the XMLHttpRequest in my app as its a lot faster than my old approach.
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May 4, 2011
XMLHttpRequest() function not work with IE 8. But its woking properly with other browsers.
[Code]...
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May 7, 2011
I am trying to create an xmlhttprequest object to update the shopping cart on my web page without submitting the entire page to the server for processing. However, what I have done so far is not working. All that is happening when I click the "update cart" button is the page sort of flashes and the check marks in the remove item check boxes disappear. The first code snippet is the "traditional" way of submitting the whole page to the server for processing - and it works. The second snippet is what I have done to try and implement AJAX to submit only the shopping cart - and it does not work.
<html>
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May 5, 2010
I am running the scripts below which should return a string containing a URL. So far, it cannot find the form contents in Firefox, but displays the non-dynamic data such as ?Location=. It won't work at all in IE.
HTML Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
[Code]....
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Mar 16, 2011
I find ajax with jquery more confusing than with regular JS, b/c in jQuery you don't declare XMLHttpRequest object.. so how do you do something like:
In example I mention here,[url] namely [url] I don't understand where var 'msg' is declared, I know it comes from the back-end, but HOW is it passed to the front-end? (how do you do this w/o responseText or something similar?)
I'm trying to connect to a send-mail jsp with ajax.. the email is not getting sent.. I want to test if the ajax connection is being made at all.. don't know how do it w/o something like xmlHttp.responseText
This is my jQuery ajax code for connecting to send-email jsp:
var dataToSend = "name=sName&email=sEmail&msg=sMsg;
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May 14, 2009
i am new to AJAX but i havejust managed to write one of my first basic scripts. What it does is takes all the news items out of a database and lists them as links. When you click a link i want all of the data that is linked to that news item to display underneath. Now i have got this to work except it will not work in Firefox, all other browsers it is fine.
[Code]....
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Mar 13, 2009
I was wondering if it was possible to execute javascript returned by ajax (XMLHttpRequest)? I can see that the script is returned by it doesn't execute. Here is what it returns. I can see the output but when I click on it nothing happens.
Code:
<script type="text/javascript">
function hi(name){
var latBox = document.getElementById("myinfo");
latBox.innerHTML = "<div>Greetings: " + name + "</div>";
}
</script>
<p onClick="hi('hi');">Math.random = " + Math.random() + "</p>
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Dec 6, 2005
Is there a way to read from a page using a setTimeOut rather than a readyStateChange?
I have a PHP script, and it uses ob_flush to print the data as it comes up with it. I would like to use AJAX to read that data as it comes out, and update a percentage bar with the data returned from the PHP. The problem is, is that usual AJAX uses readyStateChange. And the only options i have are 1) It has started, and 4) Its done.
Is there a way i can read from it as it loads?
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Nov 20, 2010
I am reading a text file using the following Javascript code.
function getXmlHttpRequestObject() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest(); //Not IE
[code]....
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Mar 20, 2009
I am trying to read data from server using AJAX XMLHttpRequest.responseText.In received data, there are lot of similar type of characters which has tge value of FFFFFD (65533). I think, all characters which has the value above 127 are converted to default character.
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May 14, 2006
Can I use the XMLHttpRequest object to call a url which would generate a PDF and then display it to the screen?
I'm new to AJAX and I'm very interested in using it to asychronously bring back documents with a content-type that IS NOT text/plain or text/html (like a PDF or Excel document) and then display that document to the screen. I have a web application that dynamically generates PDF and Excel documents. A user may have to wait a minute for the new doc to be created and displayed to the user. I want to put an animated notice saying the doc is being generated similar to what you see when you execute a search on a search engine. I've tried using animated gifs (with frames, etc.) but they don't work. As soon as a request is sent for the PDF, the browser halts the gif in IE. If I could instead call the URL that will produce the PDF asynchronously, then I could display the animated gif and call the PDF at the same time. Once the PDF is generated, I want it to then be displayed to the screen.
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Aug 20, 2010
Here's my problem code:
document.onclick=handler;
function handler(e) {
//do stuff
var params = "something";
var request = new XMLHttpRequest();
request.open("GET", "http://www.foo.com/bar.php?" + params, true);
[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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Mar 7, 2011
I've put together a function for screen scraping, just to see if I could do it. Basically, this gets a stock quote from Yahoo! and displays it. It works with no issues in IE7. FF and Chrome, however, it does not work. It will not display anything. Error Console is not returning any errors, and I'm a total novice when it comes to troubleshooting with FireBug.
[Code]....
I'm sure it's something simple, something I've overlooked. I'm beginning to think it might be with the trenary conditional setting the method.
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Apr 15, 2011
I have resorted to using a forum after 2 days of head scratching. What I need is some script to monitor the output of a php file that outputs "yes" or "no" depending on weather it is your turn in a multiplayer game.I would like it to just check every few seconds (in order to not crash the server) if it has changed. While the PHP file is showing "yes" I want it to show some buttons to make a move and when it is showing "no" for it to just say something like "enemy's turn". I hear that this kind of thing could be achieved with jQuery and AJAX but I have never used JavaScriptI already feel like I'm making a big ask but if you don't mind I would also like a way of submitting your move to a php file to make the move (submitting something to MySql)
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Feb 15, 2012
i wrote this code but noting happens.. can't find the error. even firebug is empty
$(document).ready(function(){
$.ajax({
type: "GET",
[code]....
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Feb 24, 2009
In processing the response from an AJAX call, assume the returned xml string as:
"<?xml version="1.0" encoding="UTF-8"?>
<options>
<option text="new search..." value="search..."/>[code].....
Now, in the javascript:
1)If I use ajaxRequest.responseXML, I can directly use it as DOM document, such as: ajaxRequest.responseXML.getElemetnByTagName("option");
2) Or, I can use another way(assume on Firefox):
var parser=new DOMParser();
doc=parser.parseFromString(ajaxRequest.responseText,"text/xml");
doc.getElemetnByTagName("option");
My questions are.Since I can use ajaxRequest.responseXML.getElemetnByTagName("option") directly, I do not need DOMParser to convert.On the other hand, if the ajaxRequest.responseText is NOT of the XML format, the parser.parseFromString will not work any way.Then, why (under what circumstance) should one use DOMParser?
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Aug 18, 2006
I'm having trouble figuring out what's going on with IE6's
Msxml2.XMLHTTP object. I have two feed addresses in this stripped down
version of my code below. Both work fine in Firefox (using the
XMLHttpRequest object), but only the thinkgeek one works in IE. In the
processFeed function, it shows the problem - the first alert shows 0
for the wikihow feed in IE, though it can still display the
responseText. Any insight? Code:
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Apr 25, 2010
I'm trying to create a function that will return the value of responseXML so I can assign a variable to it.
Code:
ajax.downloadXml = function (url)
{
var XMLHttpRequestObject = false;
[code]....
Stepping through the function, the onreadystatechange seems to never be executed, so nothing is returned. There's probably just a fundamental I'm messing up on.
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Feb 14, 2010
I'm try to create an XMLHttpRequest object but getting a syntax error with this code:
var XMLHttpRequest;
try{
XMLHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
syntax error: missing } XML expression (on column 56)
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Jul 23, 2005
I tried POSTing from XMLHttpRequest, i can get the XML right on server
but responseXML from server is coming null. I can see the XML right in
responseText. but responseXML is null. responseText to DOM conversion
also fails while the XML in responseText seems valid ..
-- here is the javascript code for sending ---
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Dec 4, 2006
I have several functions with code along the lines of:
var xmlDoc = requestXML("ajax.asp?SP=SelectRelatedTags&tag=" +
array[i]);
The requestXML() function includes the code:
var xmlDoc = null;
http_request.onreadystatechange = function() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
xmlDoc = http_request.responseXML;
} else {
alert('There was a problem with the request.' +
http_request.status);
}}};
http_request.open('GET', url, true);
http_request.send(null);
return xmlDoc;
However, the last line (the return) executes before the readyState
reaches 4. How do I return the xmlDoc to the functions only once the
xmlDoc has been assigned? I tried putting the return statement in a
while loop with the condition that the readyState must = 4 - this
worked, but makes the browser popup a message saying the script is
slowing down the system.
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