javascript object max size limit

Question

I m trying to pass a JavaScript variable to the server-side using jquery ajax method   I m trying to create a json string  but when the length of variable reaches 10000  no more data is appended to the string     var jsonObj      code       code       defaultfile       defaultfile       filename       currentFile       lstResDef                each keys  function i  item                i   i   1              var value       value    i  val                var value   value replace    g                       jsonObj   jsonObj                    jsonObj   jsonObj     Key            Encoder htmlEncode   this  html                    Value                 Encoder htmlEncode value                     jsonObj   jsonObj                     alert jsonObj                                               jsonObj   jsonObj           Here  when the character length of the var jsonObj is 10000  the values following that is not appended   It looks like there is some limit about that

User · Answer

Step 1 is always to first determine where the problem lies. Your title and most of your question seem to suggest that you're running into quite a low length limit on the length of a string in JavaScript / on browsers, an improbably low limit. You're not. Consider:

var str;

document.getElementById('theButton').onclick = function() {
  var build, counter;

  if (!str) {
    str = "0123456789";
    build = [];
    for (counter = 0; counter < 900; ++counter) {
      build.push(str);
    }
    str = build.join("");
  }
  else {
    str += str;
  }
  display("str.length = " + str.length);
};

Live copy

Repeatedly clicking the relevant button keeps making the string longer. With Chrome, Firefox, Opera, Safari, and IE, I've had no trouble with strings more than a million characters long:

str.length = 9000
str.length = 18000
str.length = 36000
str.length = 72000
str.length = 144000
str.length = 288000
str.length = 576000
str.length = 1152000
str.length = 2304000
str.length = 4608000
str.length = 9216000
str.length = 18432000

...and I'm quite sure I could got a lot higher than that.

So it's nothing to do with a length limit in JavaScript. You haven't show your code for sending the data to the server, but most likely you're using GET which means you're running into the length limit of a GET request, because GET parameters are put in the query string. Details here.

You need to switch to using POST instead. In a POST request, the data is in the body of the request rather than in the URL, and can be very, very large indeed.

User · Answer

you have to put this in web config     lt system web extensions gt       lt scripting gt         lt webServices gt           lt jsonSerialization maxJsonLength  50000000    gt         lt  webServices gt       lt  scripting gt     lt  system web extensions gt

User · Answer

There is no such limit on the string length  To be certain  I just tested to create a string containing 60 megabyte   The problem is likely that you are sending the data in a GET request  so it s sent in the URL  Different browsers have different limits for the URL  where IE has the lowest limist of about 2 kB  To be safe  you should never send more data than about a kilobyte in a GET request   To send that much data  you have to send it in a POST request instead  The browser has no hard limit on the size of a post  but the server has a limit on how large a request can be  IIS for example has a default limit of 4 MB  but it s possible to adjust the limit if you would ever need to send more data than that   Also  you shouldn t use    to concatenate long strings  For each iteration there is more and more data to move  so it gets slower and slower the more items you have  Put the strings in an array and concatenate all the items at once   var items     map keys  function item  i      var value       value     i 1   val   replace    g             return        Key            Encoder htmlEncode   this  html                            Value                 Encoder htmlEncode value              var jsonObj        code       code             defaultfile       defaultfile             filename       currentFile             lstResDef       items join

[javascript] javascript object max size limit

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