Develop Reference

Cross domain ajax causing issues to render data

I trying to capture data from an HTML form which will be placed on another website. From that form I need to capture data into my website. But when I tried jQuery Ajax call for cross domain it shows me 302 error with no response.
I've tried this
$('button[type="button"]').on('click', function(){
var data = $('.data-capture-form').serialize();
$.ajax({
type : 'POST',
url: 'http://prospectbank.co.uk/leads/test',
dataType: 'jsonp',
crossDomain : true,
data : data,
contentType: 'application/jsonp'
}).done(function(res){
var resp = $.parseJSON(res);
console.log(resp);
});
});
Where is problem with this code? Any help?
Fiddle Code

If you have access to the server, add the following header:
Access-Control-Allow-Origin: *
And then make JSONP calls
$.ajax({
type: "POST",
dataType: 'jsonp',
...... etc ....
If you do not have access to the external server, you have to direct the request to your server and then make a proxied call to the external server.

How to get a json response from yaler

I create an account with yaler, to comunicate with my arduino yun. It works fine, and i'm able to switch on and off my leds.
Then i created a web page, with a button that calls an ajax function with GET method to yaler (yaler web server accept REST style on the URL)
$.ajax({
url: "http://RELAY_DOMAIN.try.yaler.net/arduino/digital/13/1",
dataType: "json",
success: function(msg){
var jsonStr = msg;
},
error: function(err){
alert(err.responseText);
}
});
This code seem to work fine, infact the led switches off and on, but i expect a json response in success function (msg) like this:
{
"command":"digital",
"pin":13,
"value":1,
"action":"write"
}
But i get an error (error function). I also tried to alert the err.responseText, but it is undefined....
How could i solve the issue? Any suggestions???
Thanks in advance....

If the Web page containing the above Ajax request is served from a different origin, you'll have to work around the same origin policy of your Web browser.
There are two ways to do this (based on http://forum.arduino.cc/index.php?topic=304804):
CORS, i.e. adding the header Access-Control-Allow-Origin: * to the Yun Web service
JSONP, i.e. getting the Yun to serve an additional JS function if requested by the Ajax call with a query parameter ?callback=?
CORS can probably be configured in the OpenWRT part of the Yun, while JSONP could be added to the Brige.ino code (which you seem to be using).

I had the same problem. I used JSONP to solve it. JSONP is JSON with padding. Basically means you send the JSON data with a sort of wrapper.
Instead of just the data you have to send a Java Script function and this is allowed by the internet.
So instead of your response being :
{"command":"digital","pin":13,"value":0,"action":"write"}
It should be:
showResult({command:"analog",pin:13,value:0,action:"write"});
I changed the yunYaler.ino to do this.
So for the html :
var url = 'http://try.yaler.net/realy-domain/analog/13/210';
$.ajax({
type: 'GET',
url: url,
async: false,
jsonpCallback: 'showResult',
contentType: "application/json",
dataType: 'jsonp',
success: function(json) {
console.dir(json.action);
},
error: function(e) {
console.log(e.message);
}
});
};
function showResult(show)
{
var str = "command = "+show.command;// you can do the others the same way.
alert (str);
}
My JSON is wrapped with a showResult() so its made JSONP and its the function I called in the callback.
Hope this helps. If CORS worked for you. Could you please put up how it worked here.

How to Get Response From rest URL using jquery

I have a URL https://aua.maharashtra.gov.in/aua/rest/checkauastatus
When I visit the URL in a browser, I get an XML response. I want to collect that response in a String using Javascript or jQuery. I tried many things but nothing worked.
Please help me to get that response in a String.

Try this:
$.ajax({
type:'POST',
url:'https://aua.maharashtra.gov.in/aua/rest/checkauastatus',
success: function(response)
{
alert(response);
}
Just see if your expected reponse is coming or not.
Hope this helps.

If you are trying to make a request to other domains, use the below code for reference.
$.ajax({
url: 'https://aua.maharashtra.gov.in/aua/rest/checkauastatus',
dataType: 'jsonp',
jsonpCallback: 'dataResult',
jsonp: 'callback',
});
function dataResult(data) {
//Access your data here.
};

If you are calling ajax with different domain , then ajax will not work, You have to call your server and collect data. For e.g using curl, then return as response. You can also use jsonp if it supports.

Ajax response with JSONP, can see result cannot use it

I have the following javascript:
jQuery(document).ready( function($) {
var id = "123";
var api = "example.com:8999/".concat(id)
$.ajax({
url : api,
type: 'GET',
dataType: 'jsonp',
// jsonpCallback: "localcallback",
success: function (data) { alert('success'); }
})
});
I can see the response in chrome dev tools, but the alert isn't getting called. Ultimately I need to work with this response to set the value of a div.
Image of chrome tools:
Thanks
EDIT: Put 'POST', was using 'GET', still not working. Also, I think I'd prefer "mom and pop" json, but due to CORS and the fact I'm not good with the web and am just trying to hack this together.

Your server is not returning JSONP. It's returning plain JSON. If you specify JSONP, then the server must explicitly create a JSONP formatted response or the ajax response will not be received and processed properly.
FYI, a JSONP request is sent via a script tag (that's how it gets around the same-origin limitation for cross domain requests) and the response has to be formatted as a script that calls a function and passed the requested data to that function. You can read about how JSONP works here.

Just make your ajax call without specifying the 'dataType' attribute, then control should come back to your success callback if your ajax call completes successfully.
FYI: jQuery will try to find the response data type based on the MIME type of that response.
Example:
$( function() {
$.ajax({
url :"http://example.com:8999/123",
type: 'GET',
success: function (data) {
console.log(data); // Prints the response on console
alert('success');
}
})
});
If you want to make this call only with JSONP then it would be better to share the reason with us, so that we can suggest a better solution if possible.

Uncaught SyntaxError: Unexpected token : ajax call

So I'm trying to query the below json feed, however I keep getting the error in the topic.
I've searched around this site for possible answers however none that I've come across have worked so far. Commented out datatype and jsonp, jsonpCallback isnt it either, either is data, I've made sure that it validats via http://jsonformatter.curiousconcept.com/ and it does. I really dont know.
$.ajax({
type: 'GET',
url: 'http://raidbots.com/json/playerdata/us/mannoroth/usiris',
cache:true,
dataType: 'jsonp',
data: {
format: 'json',
},
success: ranks,
jsonpCallback:'callbackName',
error: function(data) { console.log(data); },
jsonp: false,
});
function callbackName(data){
console.log("jsonpCallback");
}
var ranks = function(data) {
console.log(data);
}
Thank you
-Art

The error is in your JSONp data because it's just JSON and not JSONp. JSONp requires the document to be valid JavaScript containing a function call.
If they don't support jsonp you need to use a proxy script (e.g. a php script on your server that retrieves the document) or ask them to send CORS headers so you can use a normal non-JSONp AJAX call to retrieve the data directly.