XHR POST size limit

JavaScript
1

Hi,

I have a problem with XHR size limit. I want to transmit text information for page to a PHP script which saves it in a MySQL database but the data are cut off. When I reload the page the changes I made are gone. Firebug produces the following message:

… Firebug request size limit has been reached by Firebug. …

this is my XHR function:

function makeXHR(recordData)
{
xmlhttp = createXHR();

var body = “q=” + encodeURIComponent(recordData);

xmlhttp.open(“POST”, “insertRowData.php”, true);
xmlhttp.setRequestHeader(“Content-Type”, “application/x-www-form-urlencoded”);
xmlhttp.setRequestHeader(“Content-length”, body.length);
xmlhttp.setRequestHeader(“Connection”, “close”);

xmlhttp.onreadystatechange = function()
{
if(xmlhttp.readyState == 4 && xmlhttp.status == 200)
{
alert(xmlhttp.responseText);
}
}
xmlhttp.send(body);

}

My question is: Is there a size limit in XHR POST requests? If yes how to disable it or is a browser issue?

regards.

2

hi,

it works now. the problem was not the post size but my regular expression search term. i also increased my php_max_size but the data will only be around 200K.

thx

3

The limit will be the same as for regular posts, which depends largely on server configuration (e.g. if you’re using PHP there’s a max_post_size setting).

How large is the data? MySQL TEXT fields are limited to +/- 64K characters, so you might need to use MEDIUMTEXT (size is about +/- 10Mb).

Firebug only displays a certain amount of data, otherwise Firebug itself might crash (dragging the browser down with it).