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how to use ajax to get a json file in github

I want to use ajax to get a json file in github, I wrote this code:
$.ajax({
url: "https://rawgit.com/nianyuyu/play_javascript/master/1.json",
type:"get",
dataType:'json',
success: function(data){
console.log(data);
},
error:function() {
console.log("err");
}
});
but I always get "err" and I check the network , it gets the data
How can I solve this problem, thank you!

Since you have included dataType:'json', in your request, jQuery will validate the returned JSON. In this case, the returned JSON has a semi-colon at the end of the body which is not valid JSON.
{
"name":"Bill Gates",
"street":"Fifth Avenue New York 666",
"age":56,
"phone":"555 1234567"
};
Remove the semi-colon to prevent the error handler from being called.

I think you are getting a parse error which is causing the issue, you can fix the json response or you can remove data type json from you request.
You will get parse error, if your json response is not valid and you are using dataType: 'json'. you can change it dataType: 'text'
$.ajax({
url: "https://rawgit.com/nianyuyu/play_javascript/master/1.json",
type:"get",
dataType: 'text',
error: function(data){
//debugger;
alert('err');
},
success:function(data) {
alert(data);
}
});
Reference: jQuery returning "parsererror" for ajax request

1.json file is incorrect. At the end there is a semi colon. Remove that semi colon and it will work fine.
if you dont have access to that file then you can use the following code.
$.ajax({
url: "https://rawgit.com/nianyuyu/play_javascript/master/1.json",
type:"get",
dataType:'text',
success: function(data){
console.log(JSON.parse(data.substring(0, data.length - 1)));
},
error:function() {
console.log("err");
}
});
Here I basically get the string and trim its last character and then parse the string back to JSON object.

You are receiving the data in error because you are expecting a JSON response where as the actual response is not a valid JSON.
It has semicolon at the end, it makes a invalid JSON.
Try dataType as text. Here you go with the example https://jsfiddle.net/sfjxsdsx/1/
$.ajax({
url: "https://rawgit.com/nianyuyu/play_javascript/master/1.json",
type:"get",
dataType:'text',
success: function(data){
console.log(data);
},
error:function() {
console.log("err");
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Based on the error, parsererror, the url doesn't seem to return valid JSON, while the call expects it to be JSON (dataType: 'json')
You can tell jQuery to parse it as text (using dataType: 'text') and then convert it to JSON manually using JSON.parse.
You'll have to trim out the last ; before you parse.
On a side note, you can use the parameter passed into the error callback to print out the error.
Fixed code:
$.ajax({
url: "https://rawgit.com/nianyuyu/play_javascript/master/1.json",
type: "get",
dataType: 'text',
success: function(response) {
if (!response)
return;
response = response.slice(0, -1); // trim ";" at the end
var data = JSON.parse(response); // convert to object
console.log(data);
},
error: function(err) {
console.log(err);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

How to transform $.post to $.ajax?

I have this $.post peace of code:
$.post("../admin-login",
{
dataName:JSON.stringify({
username:uname,
password:pass,
})
}, function(data,status){
console.log("Data:"+data);
answer = data;
}
);
and I wont to transform it to $.ajax. On the servlet side I am demanding request.getParamter("dataName") but I do not know how to write data: section in $.ajax so that I can get parameters like that(request.getParamter("dataName"))? Also, it seems to be problem with this type of code, I am asuming cause of async, that I cannot do this:
var answer="";
function(data,status){
console.log("Data:"+data);
answer = data;
}
And that answer is keeping empty(""), even though in console is written in deed "true" or "false" as my server answers. What is this about?
Thanks in advance.
I found out that problem is in the click() event. Ajax finishes when click() finishes, so I am not able to get data before event is done. What is bad in that is that I cannot fetch data because it is finished. Does anyone know how to solve this?

$.post("../admin-login",
{
dataName:JSON.stringify({
username:uname,
password:pass,
})
}, function(data,status){
console.log("Data:"+data);
answer = data;
}
);
becomes
function getResult(data) {
// do something with data
// you can result = data here
return data;
}
$.ajax({
url: "../admin-login",
type: 'post',
contentType: "application/x-www-form-urlencoded",
data: {
dataName:JSON.stringify({
username:uname,
password:pass,
})
},
success: function (data, status) {
getResult(data);
console.log(data);
console.log(status);
},
error: function (xhr, desc, err) {
console.log(xhr);
}
});

You need to see how the information os arriving to your servlet as query parameter or payload.
See this HttpServletRequest get JSON POST data

You could try structuring your AJAX request like the below:
var dataName = username:uname, password:pass;
$.ajax({
url: "../admin-login",
data: JSON.stringify(dataName),
type: "POST",
cache: false,
dataType: "json"
}).done(function(data, status) {
console.log("Data:"+data);
answer = data;
});

AJAX call returning data but failing

I've been trying to make an ajax call to retrieve some data from a database but i don't know why is returning an error.
there's the code
$('#afegir_pagament').submit(function() {
var import_pagament = $('#import_pagament').val();
var id_reserva = $('#id_reserva_hidden').val();
url = "afegir_pagament.php";
data = {import: import_pagament, id_reserva: id_reserva};
$.ajax({
url: url,
dataType: 'application/json',
type: 'post',
data: data,
complete: function(xhr, statusText) {
console.log(xhr.responseText);
},
success: function(responseText) {
$('#pag_import_pagat_propietari').val(responseText.total);
},
error: function(req, status, err) {
alert('Error');
}
});
return false;
});
console.log(xhr.responseText) returns {"total":"230.00"}
ERROR: no conversion from text to application/json
Could somebody help me?

"application/json" is not a valid value for the dataType property. Change it to "json".
See here (comment #7):
Thanks for the report, but this is not a jQuery bug. application/json is not a valid value for the dataType property.

Just change application/json to datatype :"json" and exactly what you trying to do inside the
success function ..if you trying to display this value in your text field just try this..
$("#pag_import_pagat_propietari").attr("#yourid",responseText.total);

Get parameter from JSON

In data from server I get the following JSON:
{
"response": {
"upload_url": "http:\/\/cs9458.vk.com\/upload.php?act=do_add&mid=6299927&aid=-14&gid=0&hash=73e525a1e2f4e6a0f5fb4c171d0fa3e5&rhash=bb38f2754c32af9252326317491a2c31&swfupload=1&api=1&wallphoto=1",
"aid": -14,
"mid": 6299927
}
}
I need to get upload_url. I'm doing:
function (data) {
var arrg = JSON.parse(data);
alert(data.upload_url);
});
but it doesn't work (alert doesn't show).
How do I get parameter upload_url?

It looks like you need to access arrg, not data. Also you need to access the 'response' key first.
function (data) {
var arrg = JSON.parse(data);
alert( arrg.response.upload_url);
}

There are several correct answers here, but there is one trigger that decides how you should handle your returned data.
When you use an ajax request and use JSON data format, you can handle the data in two ways.
treat your data as JSON when it returns
configure your ajax call for JSON by adding a dataType
See the following examples:
returned data string:
{"color1":"green","color2":"red","color3":"blue"}
ajax call without dataType:
$.ajax({
method: "post",
url: "ajax.php",
data: data,
success: function (response) {
var data = JSON.parse(response);
console.log(data.color1); // renders green
// do stuff
}
});
ajax call with dataType:
$.ajax({
method: "post",
url: "ajax.php",
dataType: "json", // added dataType
data: data,
success: function (response) {
console.log(response.color1); // renders green
// do stuff
}
});
In your case you probably used JSON.parse() when the call was already configured for JSON. Hope this makes things clear.

If response is in json and not a string then
alert(response.id);
or
alert(response['id']);
otherwise
var response = JSON.parse('{"id":"2231f87c-a62c-4c2c-8f5d-b76d11942301"}');
response.id ; //# => 2231f87c-a62c-4c2c-8f5d-b76d11942301

Your code has a small error. try:
function (data) {
var arrg = JSON.parse(data);
alert(arrg.response.upload_url);
});

Calling Deezer API using Ajax (jquery) - dataType JSON return null - JSONP return error

here is my code, i suggest you to test it :
function callDeezerAPI() {
$.ajax({
type: 'GET',
url: 'http://api.deezer.com/playlist/580739065',
dataType: 'jsonp',
success: function(data) {
console.log(data);
},
error: function(XMLHttpRequest, textStatus, errorThrown) {
console.log(XMLHttpRequest);
console.log(textStatus);
console.log(errorThrown);
}
});
}
callDeezerAPI();
I'm just trying to get the same result as if I'go to http://api.deezer.com/playlist/580739065 and works with these JSON data.
When I use JSONP dataType, I can see the data I want through a JQuery error... so I can't use it.
Please let me know if someone knows how to do this using JSON or JSONP (it seems that Deezer API accepts JSONP...).
Thank you !

You must specify the format via the output-parameter:
http://api.deezer.com/playlist/580739065?output=jsonp