Prevent Downloads from browser back and forward buttons

Question

I am using rails4 and in my controller page I have xl download like below.

Everything works fine but when I use the browser's back and forward buttons, it is downloading the same content again and again. How can ? get rid of it?

  def download_report
    @acquisitions = AcquisitionReport.generate(params[:acquisition_id].to_i, params[:portfolio_id])

    cookies[:fileDownload] = 'true'
    render xlsx: 'download_report',filename: "report.xlsx"
  end

Answer 1

i think, You have to maintain sessions

def download_report
  @acquisitions = AcquisitionReport.generate(params[:acquisition_id].to_i, params[:portfolio_id])

  if session[:test] == true
     session[:test] = nil
     render xlsx: 'download_report',filename: "report.xlsx"
  else
     render :nothing => true, :status => 200, :content_type => 'text/html'
  end
end