XmlHttpRequest Connection Limit - Detecting If A Request Is In The Queue
Mar 20, 2006
According to HTTP/1.1 specs, a client should only have two connections open
to the host at a time (which can be changed by browser users, of course).
When using xmlHttpRequest connections, is there any way to detect that the
request is queued?
I did some tests (see "Queued Requests" at
http://www.ajaxtoolbox.com/request/examples.php ) and it looks like
readyState 1 is fired immediately after the request is made, even though
it's not actually active yet.
Is there anything else I can look at to tell if my request has been queued
and hasn't actually started running yet?
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Oct 27, 2005
I'm having trouble finding example code to detect the presence of an Internet connection. It doesn't seem to be a very frequently asked question, as all I need is the answer yes or no (is the user connected or not).
I'm not interested in speed detection or any other aspect of the connection, just its existence or not. The reason is to be able to intercept link clicks on a CD-based set of HTML pages and pop up a warning if there is no connection; otherwise pass the request through to the net.
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Sep 20, 2009
I'm trying to queue to start once a getJSON request has finished but it's not working, I'm getting '...queue is not a function'.
I've tried:
And:
But I get the same error. I've tried with 1.3.2 and 1.2.6.
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Jul 20, 2006
I'd like to be able to detect whether the browser is receiving an HTTP
status 302 redirect when handling the response to an Ajax call. I can
see the 302 status code clearly with LiveHTTPHeaders in Firefox, but
every time the XmlHttpRequest onreadystatechange handler is called, the
status property is éU'. It seems like the 302 is being handled by the
browser somewhere upstream of my JavaScript.
(I know that this has been asked once before -- that I've found -- in
this group, but it seems like the only response misunderstood the
question.)
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Jul 10, 2009
Im trying to set request header of my XMLHttpRequest object.
Code:
xhr.setRequestHeader("Content-Type", "text/xml");
and it gives this exception
Quote:
Error: uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIXMLHttpRequest.setRequestHeader]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: http://************ :: process :: line 52" data: no]
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Jul 2, 2010
i want to find out the idle time when there is no http request is going on..i dont want to track any mouse or key board events.i dont want that..i read these thread but it is only about screen idle time URL...i am trying to track the time when there is no transaction going between client and server and no http request is sending if i will get that time then that time i can use to load my additional javascript files.so further transaction of user will become speed up..
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Nov 27, 2010
I have a script which needs to detect when the internet connection is lost and hold the content of the web page until the connection is restored.
I have been given a head start with a small javascript which I am trying to get to work.
My web page, I have a web page which contains some text and graphics but more importantly it also has an iFrame. The iFrame connects to an SQL database and displays data which is refreshed every 20 seconds.
Because the internet connection at the location where the script will be running I get connection loss which makes the iFrame loose its data. The Javascript I am working with is below.
Code:
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Oct 2, 2010
I have the following JavaScript (see below). The script requests an XML file from the server and displays it on the page.
The script works fine when the requested XML file is stored on the same server as the script.
The problem is when I try requesting an XML file from an external server such as the National Weather Service. I get an error. If I take the XML file from the National Weather Service and save it to my server it works. Why can't I use my script to request XML files stored on external servers?
Javascript Code
window.onload = initAll;
var xhr = false;
function initAll() {
document.getElementById("makeTextRequest").onclick = getNewFile;
[Code]....
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May 27, 2010
I developed a web application and it is working fine, except for one issue. The application includes uploading files from a JSP to my servlet, and the issue is that i would like to have a limit for the uploaded files on the client side (before actually uploading it).
I investigated alot and found some ways like changing my JSPs to PHPs, which is not feasable for my application. I would also like to add that using the Flash component ("<object>") for uploading is not feasable also at this time. Using ActiveX does not work also (for some security issues in javascript, it can not access the system information, also ActiveX works only on IE).
I would like to add that I have my application running on Oracle application Server, JSPs for displaying the forms, MultiPart Java API for getting the form input values and files to my servlet and everything is developed in JAVA.
Either by limiting the file size or the limiting the whole request size sent to the servlet.
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Aug 8, 2008
I am attempting to create an Access database connection from within an HTML page. I am using Javascript to make the connection and then test a basic UPDATE statement.
The following code is throwing back an error 'UPDATE statment syntax incorrect'
Code:
I thought the syntax was correct, but maybe it is something else?
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Jun 2, 2009
I worked with now in jQuery. Property however at present the following problem: [i]I provide a AJAX Request. the side is loaded, the parameters all conveyed and back receives I a complete HTML side. Now I would like to have only certain elements however from this side, like DIV, SPAN etc. How can I make with the AJAX Request return in such a way best, which I can select these elements thereby? Simply it would be unfortunately not functioned over the function $ (element), it even if I indicate the HTML Request as secondly parameter.[/i] Excused, for my bad English. ;-) Translatertool. There is unfortunately too many words, in order to describe my problem. ^^
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Oct 16, 2010
I have a php page which returns a table representing a query sent to a MySQL database. So far it has worked in every case except now that I'm trying to use it to call a stored procedure, in which case the readystate is staying at 1 and never completing.
I have logged the results of the php file both in an error log and looked at the response from the request using firebug, both of which show a correct result.
Why isn't this returning properly?
Here are the relevant javascript functions:
Code:
function customizeType()
{
$("custom-header").innerHTML = "";
$("custom-top").innerHTML = "";
[Code]....
After the page loads, the error log shows correct results for all queries.
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Jul 23, 2009
Got a question. Somehow this script does not react proper. It firsts appends and then fires the fadeout. Why is this?
$(this).fadeOut().appendTo($(to)).fadeIn('normal');
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Feb 21, 2010
I was reading about delay() in the API ref and it mentioned it used the standard effects queue or a custom queue, but didn't illustrate how you set up a custom queue.
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Jun 24, 2010
I have this jQuery chain
Code:
$(elements).delay(500).fadeInSequence().hide();
fadeInSequence is a plugin defined below
Code:
jQuery.fn.fadeInSequence = function(fadeInTime, timeBetween)
{
console.log("fadein");
//Default Values
timeBetween = typeof(timeBetween) == 'undefined' ? 0 : timeBetween;
[Code]...
I'm trying to make this plugin chainable, but right now the animation is not going in the queue. This is indicated by the fact that the .hide() goes into effect immediately. My goal is to make the plugin work so any methods called after it will wait until fadeInSequence() is finished. So in this case, all the elements will fade in and THEN .hide() will go into effect.
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Nov 26, 2009
I have a series of functions I need to run in order.The functions use a lot of scriptaculous effects and I need to que up the functions so that they only run when the previous one, with all of its functions, have finished running. Cause of the nature of what I'm trying to do, I can't use the queue that comes with scriptaculous.
I tried this http:[url]....how-do-i-store-javascript-functions-in-a-queue-for-them-to-be-executed-eventually, and the functions are still starting before all the effects finish.
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Mar 25, 2011
is there a way to tell the queue() method do not repeat itself for every element?
$('.video_list li').delay(500)
.animate( {left: move}, 1500)
.queue(function(next){
[code]....
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May 17, 2011
I have been trying to get queues working the way I thought they should work for ages… But I think I this functionality is not available in jQuery.
I basically want to run an animation in another elements queue (e.g. $('body').queue('custom')). So say I am moving a div element using the animate function I want that animation to be passed to the body's 'custom' queue so that I can do some other animations on other objects and also pass them to the body's 'custom' queue and they will respect the animation before it.
I did see a plugin [URL] which addressed it a few years ago but it has not been updated to even support jQuery 1.4.
There is also another plugin [URL] which seems quite new… but this seems ridiculous that such a feature has not already been addressed. It is a problem that I keep encountering over and over and over again.
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Sep 8, 2010
I'm trying to slide in a submenu on hover. The problem is the queue build up when moving the mouse over it quickly.
Here's my code:
I added the "stop(true, true)" to fix the build up problem but that's not what I want because when I hover while it's sliding up it "jumps" to a height of 0 before expanding.
I think that's because of the second "true" parameter (jumpToEnd). Without it .subnav doesn't open all the way anymore (it doesn't have a specific height specified).
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Dec 21, 2010
I have created the application in PHP and JQuery of display locations on google map.THere are few images in divs after clicking on it there are 3 ajax requests are called in following order 1: to display video from youtube2: to display description from database.3: to display locations on map. After clicking on images in div, result is displayed in following order.1: to display description from database. (It is displayed within 1 sec) 2: to display locations on map. (It is displayed within 2 sec)3: to display video from youtube. (It is displayed within 2 sec to 3 sec) As map and youtube video are not located on local server, so that those are taking time to display.Is there any way to display all above 3 output when all data will receive from their servers?
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Feb 8, 2010
I am having problems with the hover queue, see [URL] Now i found this plugin [URL] but assumes you are animating $(this) i my case a div triggers another div to animate
[Code]...
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Apr 28, 2010
My Javascript is very limited, but I get on pretty well with Jquery (I love it!) so some of what I say here may be seriously flawed I've done alot of searching on this but not found anything that fits what I need (I'd rather write and understand my own code than use a plugin) What a want is a simple function (or other means) of replicating the callback function for lengthy animations (so I don't end up with a load of functions within functions within functions) So I want to be able to animate (or change) a multiple number of elements IN TURN - ie once the previous animation has completed - eg
div1.animate({property: value}, 'fast');
div2.animate({property: value}, 'fast');
div3.css({property: value});
div1.animate({property: value}, 'fast');
div1.css({property: value});
div3.animate({property: value}, 'fast');
I know I can do this with callbacks, but as I said, this gets messy Can I stick these in an array and pass to a function to manage this (and if so how baring in mind my limited Javascript
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Mar 25, 2007
Someone can help me in accomplish a connection to 2 wms services. I could connect once but I changed something on the code and now I can't get the things work, the connection fails. Here is the link to the viewer:
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Jul 20, 2005
What is wrong with my code....The function "function ValidaProdutos()"
is not working....I need to execute the procedure to insert data in a
Database.... What can I do to have this code working.... I don't get
error line, but nothing happen in my database.... I think the
connection is not right.... Could anyone give a sample code on how to
do that.....
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1">
</head>
<script language='JavaScript'>
............
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Sep 8, 2009
I would like to be able to know if there is internet connection
Something like this:
If it posibile to do something like this in javascript.
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Mar 1, 2010
My question is, if I download javascript from a server (say Facebook), and then I send out a request to view some photos. The sever sends me back a list of IPs of other servers which have those photos. Now can I set connection to the other servers via the javascript? Or does the javascript can only talk to the original server?
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