How To Read The Streaming Data From IE Xmlhttprequest Object
Apr 3, 2006
I am going to use the server push
for streaming the data by keeping the connection open. At client side,
i am having the XMhttprequest object (i.e ActiveX object of IE). When
the data comes, onreadystatechange method get callback on state 3 but
it doesn't allow me to read the data from the object. It says 'The data
necessary to complete this operation is not yet available'. Is it
possible to read the streaming data from the XMLHttprequest object in
IE?
I know Mozilla supports to read the data, when the ready state is 3. In
Internet Explorer, how we can use the XMLhttp Active object to read the
I am playing with the XMLHTTPRequest method to perform client/server transactions. I have it set up right now so that when readyState is 4, it takes the XML and processes it. This works great until there is alot of data. In that case, the user will have to wait for the data to come back which may take a minute or so.
I don't want the user to have to wait. Is it possible for javascript to periodically (while still receiving more data) stop and display what it has received thus far? I guess this would be considered a type of streaming.
In mozilla/firefox, I have read that I can use readyState 3 to run my callback function every 4096 bytes. I can then take those 4K, parse them, and then continue on. However I have also read that IE cannot do this. Since I need this to work in IE, is there a workaround?
I wants to access server web page which data is continuously growing(streaming data), I want to buffered some of that data write it in responseText then again get next buffered data write it and so on (in AJAX).
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.
I am having trouble populating elements from the following Yahoo RSS feed: [URL] I need to show the current weather conditions when a button is clicked. Here is what I have so far.
[Code].....
I need to populate the <h1> and two <p> elements. I know that the copyWeatherData() and getWeatherData() functions are not coded properly.
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.
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.
I've created a small AJAX library for our application. We send the response data back as JSON in responseText. So far so good.
Before we invoke the response handler, I'm putting the eval'ed responseText in the request object like so:
Code: req.respText = eval('(' + req.responseText + ')'); This works in FF but breaks in IE 6. (*gasp*)
I finally got the Microsoft Script Editor yesterday, so I could play with the values and see what was going on. Kind of... I'm still in the dark. For some reason, it won't let me add a property to req. Can anyone explain why/how it prevents me from doing so?
Conceivably I could add the eval'ed responseText to the response handler function, but that would break the API, and would require us to modify a bunch of existing functions.
My JavaScript is trying to POST data to a CGI script (Perl) using XMLHttpRequest. My CGI server gets different data from IE than Mozilla Firefox.
// For Mozilla, req = new XMLHttpRequest(); // For IE req = new ActiveXObject("Microsoft.XMLHTTP"); req.onreadystatechange = requestHandler ; // function to handle async response req.open('POST', myURL, true); // use POST req.send('foo=11&bar=22') ;
A Perl CGI script prints the parameters passed to it. $q = new CGI ; foreach my $param ($q->param) { print "$param: " . $q->param($param) . " " ; }
The data received by the CGI script is inconsistent, depending if the client is IE or Mozilla (Firefox) Server result from IE client: foo: 11 bar: 22 Server result from Mozilla Firefox client: POSTDATA: foo=11&bar=22
It seems that the POST data IE sends is more correct than the Mozilla data. Is there another way to send the data in Mozilla so the CGI script will give the same results. I could easily adjust the CGI script, but I think the problem is at the client.
I'm working with a pretty large XML file, but I really only need to display a few things that requires quite a few transforms. I already limited to the transforms to the data i need to use, but I'd like to speed things up by loading only the data I need.
I need to mention that this is for a local application that sometimes will lookup updates on a server, but mostly, it is for local use (offline)
I can use xmlHTTPrequest for both local or server data access. That seems to work fine. Now I would like to be able to load only the data I need.
I hear the Google suggest tool bar uses xmlHTTPrequest to look up a list of known queries, so I am hoping they lookup "only" the necessary data as one types. It's kinda what I want to do, but I'm not sure how that would work, since the "url" parameter should be a destination file name.
I'm reading the content of a local binary file with the method mentioned here: [URL]
Then I'm getting the data as a string where each character represents the binary value. I have successfully sent that string with Mozilla's XmlHttpRequest's sendAsBinary method, but IE 7's version doesn't have that method...
Using the send method almost works, the only problem is that binary content can be represented as the asciicode 0. This means that the string read by sent is cut off as soon as it is encountered. That means that the part before the first NULL character (asciicode = 0) is successfully sent to the server.
The solution I have made right now is to increment each character's asciicode on the client side by one and decrement them on the server before converting the character to the binary representation. The downside with this is that the size of the data sent between the client and server gets larger than the original filesize. Ex: 8kb file grows to ~12kb.
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;
Say I have 2 HTML pages. In page A, I want to display part of page B.(content between a div tag pair with ID in B) Now I was able to use the XMLHttpRequest object to get the complete page B, namely, through the reponseText property of the XMLHttpRequest object. But my goal is only part of page B, not the entire page. I tried to use XML DOM tree node methods to extract the wanted part from page B, but it does not work. I think the problem is that page B is a HTML page, not a XML page. Is there a work around on this?
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?
I am submitting a form using ajaxSubmit and trying to read back the status code.For a error case it is showing HTTP Status 404 in responseText but not xhr.status is undefined.If i use complete callback then xhr.status 0 So how to handle case when there is some error like 404..[code]
I have a project that I need to read some data from an XML file.
Something like:
However, since JS is a client side script so it can't read from client side, is there any alternate way to do this? I am thinking to create a "Data" class, and many "Data" objects, is this an elegant way to do it?
for example there is site with address www.X.com, that has the price of some product:<div id="product1">price: 100$</div>now I wanna make site www.Y.com and then, I wanna read the price of product1 which is in the site www.X.comwe can read the value in the html site with javascript command like this:String s = document.getElementById("product1").valuebut how can we read this value in out of that site automatically?
I have posted a question I believe that relates more to the PERL language, but it has to do with reading an external data only javascript extension file. [URL]
I am working on a simple tool for my office.We have a very huge database with 5000 tables. All the tables, Columns and their attributes are stored in to excel sheet.
Tool I am designing is for mapping between front end and back end values. Now I will use an image (front end screen of our application) , when user clicks it, I need the HTML to access the excel sheet and display the back end field,the name of tables it can be found in and other data related to that field
Simply,I want to pull data from excel and display them differently for each different click. I want to pass the parameter on click and filter a column in excel with it and display the entire set of sheet with this criteria. Is this possible? or am I expecting too much
I have an object with a single Method to load content from a xml file. The problem is... how do I add a property to the object to store the data loaded?? I tryed adding a simple Array inside the object, but didn't work.
Ive been banging my head on the wall for hours with this one, hopefully someone will know what Im doing wrong here :
The Goal:
I have an xml file that is generated on the fly via JSP which I want to load into a Microsoft.XMLHTTP ActiveX object and manipulate via javascript on the client side. Data is retreived from the server at the request of the javascript without having to reload the page.
The Problem:
For the JSP to dynamically output xml, the file must have the extension JSP, which is set to the mime type of dynamo-internal/html on the server side (as we are using ATG Dynamo). But the javascript on the client side will not retrieve anything unless the file extension is ..xml (or the mime type is recognized as text/xml). So the only way I can get it to work is to change the extension to .xml, which then of course amkes it so that the server will not process any of the JSP code.
Ive tried to override the mime type within the javascript, using the setRequestHeader method after opening the file, but no luck. A call to alert the value of req.responseXML.xml after the send() turns up empty. Ive only gotten it to work if I use a static xml file in palce of the jsp. Sample of the javascript code is below:
if (window.XMLHttpRequest) { // branch for native XMLHttpRequest object - THIS WORKS req = new XMLHttpRequest(); req.overrideMimeType("text/xml"); req.onreadystatechange = processReqChange; req.open("GET", "models.jsp?cId=300006&mId=TAC24", true); req.send(null); alert(req.responseXML.xml); //this gives me the resulting xml file } else if (window.ActiveXObject) { // branch for IE/Windows ActiveX version - NOT WORKING req = new ActiveXObject("Microsoft.XMLHTTP"); if (req) { req.onreadystatechange = processReqChange; req.open("GET", "models.jsp?cId=300006&mId=TAC24", true); req.setRequestHeader("Content-Type","text/xml"); req.send(); alert(req.responseXML.xml); //this gives me nothing } }
In looking at the following example the Microsoft gives (bottom of page):
I should note that I successfully got the script to work using the XMLHttpRequest object and the overrideMimeType() method. This works with FireFox and I think some Mozilla clients, but not with the all important IE5, which instead uses the XMLHTTP ActiveX control.=
I have a streaming audio feature set up using a M3u file and a bunch of MP3's: http://www.motorcityrock.com/mcr_radio/mcr_radio.html. When then visitor clicks on the link the M3u kicks in and the songs play in the pre-determined order. That works great, but everytime a visitor clicks the link the songs start from the beginning. Is there a simple way (using Javascript or?) to keep the M3u "running" in the background all the time so that all visitors will hear the same song at the same time...just like a traditional radio station?
I have created a servlet that does nothing more than create a XML file.i have got some JQuery code that reloads the servlet to get the XML data.This works fine and i am able to load the data i want, the problem i have is that when the data is loaded to the jsp page it displays [object Document] in front of my output.
