Plupload, dynamically change url

I have an upload form with plupload and a checkbox with boolean value after the plupload div.

I want to change the value of the url in plupload if the checkbox is checked.

Here is my code

<div id="uploader">
    <p>You browser doesn't have Flash, Silverlight, Gears, BrowserPlus or HTML5 support.</p>
</div>
<input id="compressFiles" type="checkbox" name="compressFiles" style="margin:10px 0 0 10px;" value="compress" checked="checked" /> 

$(function() {

$("#compressFiles").change(function(){
    if( $("#compressFiles").is(':checked') ){
            compress = 'compress';
       }
       else{
        compress = 'no';
       }
})

$("#uploader").plupload({

    runtimes : 'gears,flash,html5,html4,browserplus,silverlight',
    url: 'uploadHandler.php?compressFiles=' + compress,
    max_file_size : '1000mb',
    max_file_count: 20, // user can add no more then 20 files at a time
    unique_names : true,
    dragdrop : true,
    multiple_queues : true,

    // Addeb by LG - problem with FF
    filters: [
        {title: "All", extensions: "*"}
    ],

    // Rename files by clicking on their titles
    rename: true,

    // Sort files
    sortable: true,

    // Flash settings
    flash_swf_url : 'js/plupload.flash.swf',

    // Silverlight settings
    silverlight_xap_url : 'js/plupload.silverlight.xap',
    init : {
        FilesAdded: function(up) {
             if( $("#compressFiles").is(':checked') ){
                compress = "no"
             }
             else{
                 compress = "no"
             }
   开发者_StackOverflow }
    }

});

// Client side form validation
$('form').submit(function(e) {
    var uploader = $('#uploader').plupload('getUploader');

    // Validate number of uploaded files
    if (uploader.total.uploaded == 0) {
        // Files in queue upload them first
        if (uploader.files.length > 0) {
            // When all files are uploaded submit form
            uploader.bind('UploadProgress', function() {
                if (uploader.total.uploaded == uploader.files.length){ alert("coucou");
                    $('form').submit();}
            });

            uploader.start();
        } else
            alert('You must at least upload one file.');

        e.preventDefault();
    }
});

});

The value of url variable is defined first time page load with compress value. I tried 1000 thinhs but impossible to refresh the compress value in the url when checkbox change.

I hope my problem is clear, dont speak english very good.

Thanks for help

Simply bind to the "BeforeUpload" event and you can change the uploader.settings to fit your needs.

this.uploader.bind('BeforeUpload', function(uploader, file) {
  if($("#compressFiles").is(':checked')) {
    uploader.settings.url = "uploadHandler.php?compressFiles=compress";
  } else {
    uploader.settings.url = "uploadHandler.php?compressFiles=no";
  }
});

In plupolad v3 chaging settings.url won't work. You have to use

uploader.setOption('url', 'your/url/here');