Develop Reference

How do i correctly call API with ajax in Cordova?

I have a cordova weather app where I call an API which returns a JSON file with weather data. But every time i call the API with ajax it returns 404, but if i copy the same url in the browser it works.
Here's the part of the code where i call the API(the url is set before):
$.ajax({
type: 'GET',
url: url,
data: {
format: 'json'
},
dataType: 'jsonp',
success: function(data, status){
console.log(data);
},
error: function(data, status) {
console.log(data.status);
}
});

From my comment:
Are you including https:// in the url? or just api... as you have here?
Try https://api.openweathermap.org/data/2.5/weather?q=london&appid=b3a1cd2134e9f28c43beacab95ea8a1a
Cordova or jQuery may or may not prepend http:// or https:// to scheme-free URLS

Jquery: Probably a syntax Issue in ajax() method - Value not getting sent

I'm able to dump value of the variable message in console .
But im not able to send it off in POST Request.
AJAX call:
chat.throwmsg = function(message) {
if ($.trim(message).length != 0) {
console.log(message);
$.ajax({
url: 'ajax/chat.php',
type: 'post',
data: { method: 'throw', message: message} ,
success: function(data) {
chat.fetchmsgs();
$('textarea#entry').val('');
}
});
}
}
This maybe due to wrong syntax, but I've tried both single and double quotes, and combination as well .

With a wild assumption, you are not having any error messages in developer console and chat.php has a post handler forthese parameters
Since your data is JSON, please change the code as this way and have a try..
var temp={ method: 'throw', message: message};
var param=JSON.stringify(temp);
$.ajax({
url: 'ajax/chat.php',
type: 'post',
data: param ,
dataType: "json",
success: function(data) {
chat.fetchmsgs();
$('textarea#entry').val('');
}
});

after reviewing the code I could not find any issues that restrict the data to be sent along with ajax request,if you are having any syntax errors you should have been warned prior the request initialization, however I recommend you to check the request header in the network tab of browser console and see your sending data along with the request if it's there you probably need to check the code of getting the post data in your server-side implementations

Catch / Handle 502 Bad Gateway Error

I have to update a large collection so I am calling in a loop an web api. I use jQuery.ajax()
Something like this:
$.ajax({
type: 'GET',
url: 'http://www.somesite.com/API/API.php',
jsonpCallback: 'API_SC4',
contentType: "application/json",
dataType: 'jsonp',
data:'action=update&page='+collection[currentIndex].name+'&callback=API_SC4',
async:false,
success: function(data) {
//use data for update of collection[currentIndex]
UpdateNext(currentIndex+1);
},
error: function(e) {
//interpret error
UpdateNext(currentIndex+1);
}
});
The problem is the collection is quite large and sometimes I get a 502 Bad Gateway error and the ajax error handler is not called.
I even tried $( document ).ajaxError() but i'm doing a cross-domain jsonp call , and it seems .ajaxError() does not get called in that situation.
Is there any way to handle that error? Something at window level?
I can see the error in the Chrome development console , and I was thinking there might be a way.
Thanks

Yes, there is: statusCode. See the jQuery documentation on AJAX for details.
Simple example:
$.ajax({
statusCode: {
502: function () {
alert('Fail!');
}
}
});

Perform GET request using jquery

I need to perform the following GET request,
telnet somesite.com 80
GET /index.html HTTP/1.0
using javascript, jQuery.
I've tried to follow the instructions in this site in particular the following code:
$.ajax({
url: 'http://somesite.com',
success:function(data){
alert(data);
}
});
but It doesn't work!
Where am I wrong?

Try this one:
$.ajax({
type: "GET",
url: "http://somesite.com",
timeout: 300000,
contentType: "application/json; charset=utf-8",
success: success,
error: failure
});
function failure(response) {
alert(response);
}
function success(response) {
alert(response);
}

by your code im assuming you are doing a cross domain ajax request. Which are automatically blocked by the browser.
you can either use the allow domain header using Cors see this Cross Domain Get Request in JS/JQuery
or switch to JSONP

If you want to perform a cross domain request try this
Working DEMO
You can use this in your head tag
<script src="https://rawgithub.com/IonicaBizau/jQuery-cross-domain-requests/master/js/jquery.xdomainajax.js">
</script>
code
$.ajax({
url: 'http://somsite.com', // Or your web page link
type: 'GET',
success: function(res) {
alert(res);
}
});

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.