This is the strangest bug I've encountered.
I submit an ajax POST that would retrieve some data.
$.ajax({
url: url,
data: data,
type: 'POST',
success: function(data){
console.log(data)
},
dataType: 'json',
contentType: 'application/json; charset=utf-8'
}
)
In other version of IE and Chrome, the code would work fine and give the value of data which is {"success": true}.
But in IE8, data would return undefined . However, if I do JSON.stringify(data) , it would return {"success":true}.
I tried to convert the returned string to object via $.parseJSON(JSON.stringify(data) but it returned undefined again.
What can I do to get the response data as an object like I would normally in other browser?
EDIT:!! Found the solution. Apparently, the IE8 emulation of IE11 is a total crap and cannot display data correctly. Using IE8 on a virtual machine would correctly display the data and I figured out why it was undefined. Thanks for the help!
Found the solution! Apparently, the IE8 emulation of IE11 is a total crap and cannot display data correctly. Using IE8 on a virtual machine would correctly display the data and I figured out why it was undefined. Thanks for the help!
I'm not sure that you need to do that in IE8. Here is some code that I use with success in IE8 on a website that is live that is using jQuery 1.10.2:
$.ajax({
type: "POST",
crossDomain: true,
url: 'http://example.com/service/url',
data: params,
dataType: 'json',
timeout: 10000
})
.done(function( data ) {
console.log("Success");
console.log(data.success);
})
.fail(function( data ) {
console.log("Rejected");
console.log(JSON.stringify(data));
});
Hopefully this example is helpful for you to see how to handle the jQuery callback. The object that comes back is already an object if the result is actually valid JSON.
Updated this to be more generic of an answer.
Related
My Code is as below for Javascript
$.ajax({
type: "POST",
url: "page/rSales.aspx",
data: { ListID: '1', ItemName: 'test' },
dataType: "json",
success: function (res) {
alert('Success');
},
error: function (res) {
alert('Fail');
}
});
I use http tracer tools to trace whether or not the parameter is passing on to my backend - and it is not. I have also tried adding contentType: 'application/json; charset=utf-8', adjust parameter by adding colon, but none of it is working.
My Backend code C# :
Request.Params["ListID"].ToString();
It always returns null, due to the parameter not passing on. I am wondering what is causing this problem and how should I resolve it.
The Request.Params collection does not support JSON requests, so you have to parse response body manually (or send it as form data).
https://msdn.microsoft.com/en-us/library/system.web.httprequest.params(v=vs.110).aspx says "Gets a combined collection of QueryString, Form, Cookies, and ServerVariables items."
For firefox you declare var event; before your ajax call this is very well known issue in firefox.
I have getJson like this:
$.getJSON(userUrl+'scanp?callback=?', { 'someparametar': 100 }, function(data){
console.log(data);
});
and I do get a response from my url, and it looks like this:
'"jQuery1110010384737118147314_1401820556204({'hasWon':'false','code':'120580e9fce67a4921f31af7ffa358cc10c83b10','defaultReward':'{\"secure_url\":\"https://res.cloudinary.com/deh0vdgzd/image/upload/v1401318096/k6jrm2pehwycmehrkicz.png\",\"url\":\"http://res.cloudinary.com/deh0vdgzd/image/upload/v1401318096/k6jrm2pehwycmehrkicz.png\",\"resource_type\":\"image\",\"format\":\"png\",\"height\":960,\"width\":640,\"signature\":\"a8ca9bb867e0a3d99e1666b7891e8f918d81e627\",\"version\":1401318096,\"public_id\":\"k6jrm2pehwycmehrkicz\"}''}"'
Any idea why I don't get any response when I console.log it?
With 'callback' in your querystring, JQuery wraps the response with a randomly generated method name. To get JSON (without method name), remove 'callback=?' from querystring.
If your server supports JSONP, you can make a call like this :
$.ajax({
type: 'GET',
url: url,
jsonpCallback: 'jsonCallback',
contentType: "application/json",
dataType: 'jsonp',
success: function(json) {
console.log(JSON.stringify(json));
},
error: function(e) {
console.log(e.message);
}
});
Hope this helps.
Well I figured it out, the request I wrote was perfectly fine. The thing that was causing the the problem was response I was getting from server.
It was JSON stringified before return.
I am using below code to access rest service hosted on another domain.
$.ajax({
type: 'GET',
url: url,
async: false,
jsonpCallback: 'jsonCallback',
contentType: "application/json",
dataType:"jsonp",
success: function(json) {
alert(json);
},
error: function(e) {
console.log(e.message);
}
});
I am able to get the data correctly, but I get this error in firebug in mozilla:
SyntaxError: missing ; before statement
{"Hello":"World"}
Can anyone suggest me what I am doing wrong here? Even though Json data is valid. I tried all the suggestions posted in this question But still I am getting same error.
If it's really JSON you ask for, don't set "jsonp" as dataType, and don't provide a callback :
$.ajax({
type: 'GET',
url: url,
contentType: "application/json",
success: function(json) {
alert(json);
},
error: function(e) {
console.log(e.message);
}
});
the format of JSON and JSONP are slightæy different
JKSONP is a function invocation expression
callback({"hellow":"world"});
whereas JSON is simply a serialized object
{"Hello":"world"}
fromyour posting it would seem that the server is returning JSON and not JSONP
So you either need to change the server to reply correctly (The actual callback name is a get parameter to the request). You should do this if you are using the ajax call across domains
If you are not using ajax across domains stick to regular JSON
The following ajax works exactly as advertised in Chrome. HTTP PUT is used to trigger the insertion of an object into a RESTful API.
$.ajax({
type: "PUT",
url: "/ajax/rest/team/create/",
dataType: "json",
processData: false,
data: JSON.stringify(teamObject),
success: function (response) {
teamObject = response.object;
}
});
I note that the jQuery API docs helpfully tell me that PUT and DELETE may work but are not guaranteed in all browsers. Such as is my problem.
How is a RESTful API supposed to be implemented on the client side with a problem like this?
EDIT: Firebug tells me that FF is indeed issuing a PUT, but for some currently unknown reason it's dying before getting to the server. To repeat, this works fine in Chrome.
EDIT: Fiddler doesn't see the FF attempt at all. :(
I got the following to work.
var payload = JSON.stringify(teamObject)
syncHTTP('/ajax/rest/team/create/', 'PUT', payload);
function syncHTTP(url,method,payload) {
var client = new XMLHttpRequest();
client.open(method, url, false);
client.setRequestHeader("Content-Type", "text/plain");
client.send(payload);
}
I'd rather use jQuery than roll my own tho. :| If anyone ever figures it out, just add an answer and if it works I'll accept it.
Thanks.
$.ajax({
type: "PUT",
url: "/ajax/rest/team/create/",
dataType: "json",
contentType: "application/json",
processData: false,
data: JSON.stringify(teamObject),
success: function (response) {
teamObject = response.object;
}
});
You need to add contentType. When contentType is set to application/json jquery do not try to create JSON object from JSON string but send it as is - as string.
I try to retrieve a JSON object with jQuery from a server. Some properties of this object are arrays. When these arrays are not empty, I'm able to process my object. But when I retrieve a JSON like this one :
{"Id":144,"Identifier":"4000011","ContractId":115,"ContractName":"Test4","Meters":[],"Scans":[]}
where "Meters" and "Scans" are empty, jQuery raises an error... I query my server with this code :
$("#test").click(function () {
$.ajax({
type: "GET",
url: "/Gateway/GetDetails/144",
data: {},
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data, textStatus, jqXHR) {
...
},
error: function (jqXHR, textStatus, errorThrown) {
...
}
});
In the error handler, I can see my JSON object in the responseText property of the parameter "jqXHR". Did you encounter this problem ?
Thanks in advance !
The JSON you've supplied is valid (as confirmed by the JSON Lint tool); is it possible that the Server you are querying is returning an HTTP Error Status Code, or that an internal error is happening on the server side. You can confirm this by using a debugging proxy like Firebug, Chrome Developer tools.
I answer my own question... First I tested only with Internet Explorer 9; with an other browser, all worked as expected. After I cleared the Internet Explorer cache, the problem disappeared.