AJAX Response Size Limit

Question

I am using AJAX to asynchronously call a PHP script that returns a large serialized array of JSON objects (about 75kbs or 80k characters). Every time I try and return it it hits a 3000 character limit. Is there a maximum size set anywhere on servers or within jQuery's ajax implementation?

EDIT: the 3'000 limit is a Chrome limit, FF has a 10'000 character limit and Safari has no limit. I'm guessing there is no fix for this apart from changing my code to split/lessen the return data.

[This question](http://stackoverflow.com/questions/898477/ajax-request-browser-limit) may shed some light. The accepted answer states that it's the JSON array's _depth_ that matters, not it's size. When you view your 3k char response, is it cut off at the beginning of an array/object, or in a random place? — Bojangles, Apr 15 '12 at 20:02
It returns the beginning of the expected return value and then there's an ellipsis bang in the middle and then it returns the end of the expected return value. — RichieAHB, Apr 15 '12 at 20:05
@JamWaffles - also I'm only returning an array of JSON serialized as plain text so I guess it shouldn't really be reading it as a JSON. — RichieAHB, Apr 15 '12 at 20:07

score 1 · Answer 1 · answered Oct 01 '13 at 02:21

You can split your JSON and get with $.ajax part by part

I made an example for you

Html side :

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <script src="jquery.js"></script>
    <script>
    $(document).ready(function() {

        window.result_json = {};

       $.get("x.php?part=size",function(data){
          var count = data;
          for (var i = 0; i <= count; i++) {
            $.ajax({
              dataType: "json",
              url: "x.php",
              async: false,
              data: "part="+i,
              success: function(data){
                $.extend(window.result_json,data);
              }
            });
          };
          console.log(window.result_json);
       });
    });
</script>
</head>
<body>

</body>
</html>

PHP side (file name is x.php) :

<?php
if(isset($_GET['part'])){

    function send_part_of_array($array,$part,$moo){
        echo json_encode(array_slice($array, $part * $moo,$moo,true),JSON_FORCE_OBJECT);
    }
    $max_of_one = 3;
    $a = array("a","b","c","d","e","f","g","h","i","j");

    if($_GET['part'] == 'size'){
        echo round(count($a) / $max_of_one);
    }else{
        send_part_of_array($a,$_GET['part'],$max_of_one);
    }

}
?>

Firstly with $.get (part=size), check how many slices.

Secondly with $.ajax(part=(int)PART-NUMBER) , in for loop get the parts of JSON one by one

Lastly with $.extend in for loop marge new getting JSON and old JSON elements in window.result_json

NOTE: $max_of_one variable determine how many slices to post.

AJAX Response Size Limit

1 Answers1