How to download any file using send_file() method

Rails
1

HI,

I am directory listing and in that listing I have certain files and sub
directories, now when I click on the files it should download that
particular file but I am not able to accomplish it, and I have got to
use send_file() method.

In the send file Code shown below I have made use of the address of one
of the files directly so when I click the link of any file it downloads
it.

THE CODE
…

def listing

    if (params[:dir] !=nil)
       @path   = params[:path]+"/"+params[:dir]
    else
       @path ="D:/hr"
    end

       @f=File.ftype(@path)
          if @f=="file"
             redirect_to :action=>'download_files'
           else
           @dirEntries = Dir.entries(@path)
           @dirEntries.reject! { |filename| filename.starts_with?

‘.’ }
end
end

      def download_files

            send_file('D:/hr/xyz.doc',
                       :filename        =>  params[:filename] ,
                       :type              =>

‘application/octet-stream’,
:disposition => ‘attachment’,
:streaming => ‘true’,
:buffer_size => ‘4096’)
end