File Download requests using jquery/POST request with psuedo ajax

filedownloader.js

// Takes an URL and object to pass to the server.
// Sends to the server. The server can respond with binary data to download.
jQuery.download = function(url, object) {
    // Build a form
    var form = $('<form></form>').attr('action', url).attr('method', 'post');

    var keyValuePairs = jQuery.param(object).split('&').map(function(x) {
        var splitted = x.split('=');
        return {
            key: decodeURIComponent(splitted[0]),
            value: decodeURIComponent(splitted[1])
        };
    });

    // Add key/value pairs to the form
    keyValuePairs.forEach(function(x) {
        // Add the key/value
        form.append($('<input></input>')
            .attr('type', 'hidden')
            .attr('name', x.key)
            .attr('value', x.value));
    });
            
    // Send request by submitting the form, then remove it
    form.appendTo('body').submit().remove();
};