Pastable version of Download file

<pre class='prettyprint' language='ruby'>def download
    dl_opts = params[:dl].nil? ?   'attachment' : 'inline'
    dl_img  = params[:type].nil? ? &quot;&quot; : &quot;_#{params[:type]}&quot;
    dl_file = FileUpload.find_by_item_id(params[:id])
    unless dl_file.nil?
      dl_file_type   = dl_file.mime_type
      dl_file_ext    = dl_file_type.item.self_title
      dl_file_name   = &quot;#{dl_file.original_name}#{dl_img}.#{dl_file_ext}&quot;
      dl_file_path   = &quot;#{RAILS_ROOT}/public/upload/#{dl_file.id}/&quot;
      dl_file_title  = dl_file.item.self_title
      dl_public_name = dl_file_title == dl_file_name ? dl_file_name :
                                                       &quot;#{dl_file_title}#{dl_img}.#{dl_file_ext}&quot;
      send_file(&quot;#{dl_file_path}#{dl_file_name}&quot;,
                :disposition =&gt; dl_opts,
                :encoding    =&gt; 'utf8',
                :type        =&gt; dl_file_type.content_type,
                :filename    =&gt; URI.encode(dl_public_name))
    end
  end</pre>
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Pastable version of Download file