AJAX: only error callback is been fired

Question

I have declared success and error callbacks, but in case of status code 200 also it calls error callback only.

I have been making curl call to some other php file too inside registry.php.

Here what i tried:

$.ajax({
  type: "POST"
  ,data: {
    action: "blah"
    ,mobileNo: that.mobNo
    ,token: that.key
  }
  ,url: "http://90.8.41.232/localhost/registry.php"
  ,cache: false
  ,dataType: "json"
  ,success: function (response) {
    console.log("success");
  }
  ,error: function () {
    console.log("error");
  }
});

I have read in documentation that we don't have to call success callback explicitly, hope it's correct.

Any idea how to call success callback when it is 200 status code.

RESPONSE hope this will help, this I copied from chrome console, not printed by console.log().

bort: (statusText)
always: ()
complete: ()
done: ()
error: ()
fail: ()
getAllResponseHeaders: ()
getResponseHeader: (key)
overrideMimeType: (type)
pipe: ()
progress: ()
promise: (obj)
readyState: 4
responseText: "{"success":"Mobile No 9535746622 is approved"}      {"report":true}"
setRequestHeader: (name,value)
state: ()
status: 200
statusCode: (map)
statusText: "OK"
success: ()
then: ()

Answer 1

As you have mentioned that you are making a curl call to some other php, what happens is whenever you make curl call you have to return the response of the curl to the client. So to transfer the return value of curl call, you have to set an option curl_setopt($curl,CURLOPT_RETURNTRANSFER,true);. This will sort your problem. Hope so.

Answer 2

First, checkout the real error you get (not certain you really get a 200 status ?)

error: function (err) {
  console.error("error");
  console.log(err);
  console.log(err.stack);
  throw err;
}

Show us the resulting log please.