Setup Uploadify to upload directly to S3

gistfile1.js

var uploadify_data = {
  'AWSAccessKeyId': '<%= @uploadify_data[:access_key] %>',
  'bucket': '<%= @uploadify_data[:bucket] %>',
  'acl': 'private',
  'key': '<%= @uploadify_data[:key] %>${filename}',
  'signature': '<%= @uploadify_data[:signature] %>',
  'policy': '<%= @uploadify_data[:policy] %>',
  'success_action_status': '<%= @uploadify_data[:sas] %>',
  'folder': '',
  'Filename': ''
}

function uploadify_success(file, data, response) { }

$(document).ready(function() {
  $('#contact_file_field').uploadify({
    swf:              "<%= asset_path('uploadify.swf') %>",
    uploader:         "<%= @s3_url %>",
    formData:         uploadify_data,
    fileSizeLimit:    <%= @uploadify_data[:filesize] %>,
    fileObjName:      "file", // Necessary, DO NOT remove this.
    onUploadSuccess:  uploadify_success,
    multi:            true
  })
})