XMLHttpRequest POST data size

问题

Is there a size limit to a XHR POST request? I am using the POST method for saving textdata into MySQL using PHP script and the data is cut off. Firebug sends me the following message:

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

This is my code for sending the data:

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);
            alert("Records were saved successfully!");
        }
    }
    xmlhttp.send(body);

}

The only solution I can think of is splitting the data and making a queue of XHR requests but I don't like it. Is there another way?

回答1:

XHR Post has no size limit, but you're sending data to PHP which has a size limit ;) Create the following php-file and open it in a browser:

<?php phinfo(); ?>

Now search for the variable "post_max_size", this variable limits the maximum data that can be sent to PHP (but it can be changed in the php.ini)

来源：https://stackoverflow.com/questions/3069342/xmlhttprequest-post-data-size