I am trying to cache the result of a JQuery. This is my Ajax call:
$.ajax({
dataType: "json",
url: myEndPoint,
type:"GET",
cache:true,
startTime: performance.now(),
data: {"query": myQuery,
"output": "json"},
success: createDisplay,
error: myError
});
console.log('After .ajax');
};
I am trying to do this so that I minimize the amount of Ajax calls as I noticed that it takes about 2.4s to get the results which results in a lag time on the web user interface. In the networks console window I can see that the query is being re-executed even if it has been performed before. What am I doing wrong? Can I see the cached contents anywhere?
Sure you can store it on localStorage.
There is also a library that does just that: cache4.js
It is a wrapper for the jQuery ajax call. Just pass to it what you would pass to $.ajax.
[EDIT] Sure Simas Joneliunas Although I can guarantee that the docs will stay the same, as I own the repository.
Using the question example, it would be something like this:
cache4js.ajaxCache({
dataType: "json",
url: myEndPoint,
context: {
startTime: performance.now()
}
data: {
"query": myQuery,
"output": "json"
},
success: createDisplay,
error: myError
}).then(function (res){
console.log('After .ajax');
});
Related
I am sending username and password as request parameter to the server in AJAX and trying to show the response message. But not able to showing the response message.In fiddler it is showing the response message. But while on the browser screen it is not showing.PLEASE somebody help me out where i am wrong or need to change anything..
I have written like this-
$(document).ready(function () {
$("#btnCity").click(function () {
$.ajax({
type: "POST",
url: "http://test.xyz.com/login",
crossDomain: true,
contentType: "application/json; charset=utf-8",
data: { username: "abc", password: "1234" },
dataType: "JSONP",
jsonpCallback: 'jsonCallback',
async: false,
success: function (resdata) {
alert(resdata);
},
error: function (result, status, err) {
alert(result.responseText);
alert(status.responseText);
alert(err.Message);
}
});
});
});
TL;DR: I guess the problem is on the server side of your code (that we don't know yet).
At first: I don't know why it fails for you. I've taken your code and ran it against a public available JSONP API, that returns the current IP of your system and it worked.
Please try yourself using the URL: http://ip.jsontest.com/.
So most probably, the server doesn't return the right response to the JSONP request. Have a look at the network tab in developer tools. With your current code, the answer of the server should be something like:
jsonCallback({'someResponseKeys': 'someResponseValue'});
Note: The header should contain Content-Type:application/javascript!
BTW, even if this doesn't for now solve your problem - here are some tweaks, I'd like to advice to you:
Don't set async to false, at the documentation of jQuery.ajax() says:
Cross-domain requests and dataType: "jsonp" requests do not support synchronous
operation.
You don't need to set a jsonpCallback, because jQuery will generate and handle (using the success function a random one for you. Quote from the docs:
This value will be used instead of the random name automatically generated by jQuery. It is preferable to let jQuery generate a unique name as it'll make it easier to manage the requests and provide callbacks and error handling.
So here comes my code:
$(document).ready(function () {
$("#btnCity").click(function () {
$.ajax({
type: "POST",
url: "http://ip.jsontest.com/",
crossDomain: true,
data: { username: "abc", password: "1234" },
dataType: "JSONP",
success: function (resdata) {
console.log("success", resdata);
},
error: function (result, status, err) {
console.log("error", result.responseText);
console.log("error", status.responseText);
console.log("error", err.Message);
}
});
});
});
A working example can be found here.
Another solution, like Yonatan Ayalon suggested, can be done with a predefined function and then setting the jsonpCallback explicitly to the function that should be called.
if you see the response in Fiddler, it seems that the issue is in the callback function.
you are doing a jsonP call - which means that you need a callback function to "read" the response data.
Do you have a local function that calls "jsonCallback"?
this is a simple jsonP request, which initiates the function "gotBack()" with the response data:
function gotBack(data) {
console.log(data);
}
$.ajax({
url: 'http://test.xyz.com/login' + '?callback=?',
type: "POST",
data: formData,
dataType: "jsonp",
jsonpCallback: "gotBack"
});
You can try with the following methods and close every instance of chrome browser in task manager, then open browser in web security disable mode by the command "chrome.exe --disable-web-security"
success: function (resdata) {
alert(resdata);
alert(JSON.stringify(resdata));
},
And the better option to debug the code using "debugger;"
success: function (resdata) {
debugger;
alert(resdata);
alert(JSON.stringify(resdata));
},
I wanted to retrieve data using ajax, when open the url in browser it showing data but when i execute this url in ajax code error msg function is running however data is showing in browser.
url: "http://live.nayatel.com/?json=1"
$(document).ready(function() {
$.ajax({
type: "GET",
url: "http://live.nayatel.com/?json=1",
cache: false,
success: onSuccess,
error: onError
});
});
its a wordpress site and i used a plugin to retrive its data working in browser but not giving response text.
I have two suggestions, since I am not that sure about your problem.
a) Try changing
success: onSuccess,
to
success: function(data, status) {
onSuccess(data, status);
},
b) If that fails, try adding
crossDomain: true,
I have a very basic ajax call to alert the data that was reported from the server
$.ajax({
type: "POST",
url: "/someform/act", //edit utl to url
data: { changed: JSON.stringify(plainData) }, //edit to include
success: function(data) {
alert(data); //data not $data
},
error: function() {
//error condition code
}
});
According to the docs on the jquery website regarding data field on the success callback, it says that data returned is the data from the server. However for some strange reason when I alert $data, I get [object Object]
I was expecting to see something like this, since that is what the server would send back
<status>0</status>
EDIT:
data is also passed along as the POST
You need to use JSON.stringify(data) in the alert to get anything readable.
Also, $data is a completely different variable name than data.
alert() prints the string representation of the arguments - hence if you pass an object, you'll get [object Object].
To inspect data, use console.log(data) better.
If you server send a JSON, you need to put dataType: 'json' to your ajax call. Be aware there's some mistake in your ajax call.
$.ajax({
type: "POST",
url: "/someform/act", // NOT 'UTL',
data: {
key: value,
key2: value2
},
// or data: plaindata, // If 'plaindata' is an object.
dataType: 'json',
success: function(data) {
console.log(data); // As moonwave99 said
},
error: function() {
//error condition code
}
});
EDIT
When sending data, you should send an object. jQuery will handle the array to sned it to the server. So if plain data is an object, it should be like this
data: plainData,
If you're sending data via $.ajax({...}), the Network tab of your browser inspector might be showing [object Object] in the Payload (Chrome) / Request (Firefox) sub-tab, like in the following image (Firefox):
The reason for this might be in the way you're forming your AJAX call. Specifically:
$.ajax({
url: '/ajax/example-endpoint',
data: {'fooKey':fooData,'barKey':barData},
type: 'post',
cache: false,
contentType: false, // this one will turn your data into something like fooKey=fooData&barKey=barData
processData: false, // and this one will make it [object Object]:""
beforeSend: function() {
// whatever it is you need to do
},
success: function(data) {
// do stuff
},
error: function(desc, err) {
// do stuff
}
});
When combined, contentType: false and processData: false turn your data into [object Object], because you're actually telling your AJAX call to ignore the content type of whatever is being sent, and not to process it.
If it's IIS, try creating a site outside of the Default Web Site (for example localhost/ajax1). For example a new site ajax1, place it not in the DefaultAppPool, but in your pool, for example ajax1. Try http://ajax1
I have come across a peculiar item in JQuery that I am hoping somebody can help me to understand.
I've spent much of the day trying to get JQUERY's AJAX 'success' function to be raised when returning JSON from the server.
I checked the JSON # JSONLint to ensure validity, checked encoding, tried different headers, but still PROBLEMS.
After a couple hours, I switched the url (by accident!)
from
http//www.testing.com/_r4444/myfile.php
to the exact same thing WITHOUT the www... and it suddenly worked.
I have no clue why this would be the case - any ideas?
the snippet follows
$(document).ready(function() {
$.ajax( {
type: "POST",
contentType: "application/json",
url: "http://testing.com/_r4444/getter.php",
beforeSend: function(x) {
if(x && x.overrideMimeType) x.overrideMimeType("application/json;charset=UTF-8");
},
data: "pass=TEST",
dataType: "json",
error: function (xhr, status) {
alert(status);
},
success: function (result) {
alert(result);
}
});
});
Are you using "www" on the page in the browser?
Try switching the call to not include the domain, like:
"/_r4444/getter.php" instead of the full domain.
I have a problem to refresh a bloc in my page.
Here is the request:
> $("#pwd_lost_link").click(function(){
alert('1');
$.ajax({
type : 'POST',
url: 'test.php',
dataType: 'json',
data :{"nom" : "akbar"},
success : function(data){
$("#main_bloc").append(data.msg);
alert('2');
},
error : function(XMLHttpRequest, textStatus, errorThrown) {
alert(XMLHttpRequest.responseText);
alert(errorThrown); }
}); })
and here is the php file
<?php
$return['nom'] = "ffrfrfrfr";
echo json_encode($return)
?>
It doesn't work. It give me a status error ( 0 ) and the page is automatically reloaded
Thanks
Michaël
Confusing question Michael, not sure what you mean by "the page is automatically reloaded" but you should do 2 things:
In the $.ajax() method, make sure your success called back is handling the data correctly. You are looking for data.msg but I don't see where .msg comes from.
$.ajax({
type: "GET",
contentType: "application/json; charset=utf-8",
data: {},
dataType: "json",
url: url,
success: function(data) {
// parse data object so you can see what's being returned ex. alert(data) or alert(data[0]) or alert(data.nom)
},
error: function (xhr, status, error) {
// XHR DOM reference: http://www.w3schools.com/dom/dom_http.asp
// check for errors ex. alert(xhr.statusText);
}
});
On the PHP side, you may want to debug there to see what is being received and what you are sending back.
Aside from that using an XHR viewer like Firebug or Chrome's built-in utility (CTRL+SHIFT+I) can be very helpful.
And on a final note, if pwd_lost_link is a link elment a id="pwd_lost_link" href="..." then you will have to stop the browser from following the link before you process the AJAX.
$("#pwd_lost_link").click(function(e) {
e.preventDefault();
alert('1');
$.ajax({
...
});
If you aren't seeing the '1' being alerted then that is definitely your first problem.
You're trying to access data.msg, but your PHP script is only creating data.nom. So data.msg doesn't exist. Try changing data.msg to data.nom and see if this does what you want.