plupload + Coffeescript + Rails 3

upload.coffee

window.initUploader = () ->
  uploader = new plupload.Uploader({
    runtimes : 'html5,flash,silverlight,',
    browse_button : 'drop_zone_home',
    drop_element : 'drop_zone_home',
    container : 'uploadContainer',
    max_file_size : '10mb',
    url : '/posts',
    flash_swf_url : '/swf/plupload.flash.swf',
    silverlight_xap_url : '/swf/plupload.silverlight.xap',
    filters : [
      {title : "Image files", extensions : "jpg,gif,png"}],
    resize : {width : 320, height : 240, quality : 90},

    multipart: true,
    urlstream_upload: true,
    multi_selection:false,
    multipart_params: {
      'authenticity_token': $('meta[name="csrf-token"]').attr('content')
    },

  })

  uploader.bind('Init', (up, params) -> $('#filelist').html(""))

  $('#uploadfile').click((e) -> uploader.start(); e.preventDefault());

  uploader.init();

  uploader.bind('FilesAdded', (up, files) -> 
    
    if (uploader.files.length == 2)
      f = uploader.files[0]
      uploader.removeFile(f)
      $("#" + f.id).remove()

    $.each(files, (i, file) -> $('#filelist').append('<div id="' + file.id + '">' + file.name  + '</div>'))
      
    $('#uploadContainer').find('p').hide();
    
    up.refresh(); # Reposition Flash/Silverlight
  );

  uploader.bind('UploadProgress', (up, file) -> $('#' + file.id + " b").html(file.percent + "%"))

  uploader.bind('Error', (up, err) ->
    $('#filelist').append("<div>Error: " + err.code +
      ", Message: " + err.message +
      (if err.file then ", File: " + err.file.name else "")  +
      "</div>"
    )
    up.refresh(); #Reposition Flash/Silverlight
  )

  uploader.bind('FileUploaded', (up, file) -> $('#' + file.id + " b").html("100%"))