Class: PdfController

Inherits:
ApplicationController show all
Defined in:
public/app/controllers/pdf_controller.rb

Constant Summary collapse

PDF_MUTEX = 
java.util.concurrent.Semaphore.new(AppConfig[:pui_max_concurrent_pdfs])

Instance Method Summary collapse

Methods inherited from ApplicationController

#archivesspace, can_access?, permission_mappings, set_access_control

Instance Method Details

#resource ⇒ Object 



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# File 'public/app/controllers/pdf_controller.rb', line 7

def resource
  PDF_MUTEX.acquire
  begin
    repo_id = params.fetch(:rid, nil)
    resource_id = params.fetch(:id, nil)
    token = params.fetch(:token, nil)

    pdf = FindingAidPDF.new(repo_id, resource_id, archivesspace, "#{request.protocol}#{request.host_with_port}")
    pdf_file = pdf.generate

    if token
      token.gsub!(/[^a-f0-9]/, '')
    end

    respond_to do |format|
      # Remove all special characters from filename.
      filename_extension = File.extname(pdf.suggested_filename) # Extract file extension
      filename = pdf.suggested_filename.gsub(filename_extension, '') # Remove file extension
      filename = filename.gsub(/[^a-zA-Z0-9\s]/, '_') # Replace all special characters with underscores
      filename.chop! if filename[-1] == '_' # Remove last underscore
      filename = filename.gsub(/_+/, '_') # Replace underscores multiple with one underscore

      filename = "#{filename}#{filename_extension}"

      format.all do
        fh = File.open(pdf_file.path, "r")
        self.headers["Content-type"] = "application/pdf"
        self.headers["Content-disposition"] = "attachment; filename=\"#{filename}\""
        self.response_body = Enumerator.new do |y|
          begin
            while chunk = fh.read(4096)
              y << chunk
            end
          ensure
            fh.close
            pdf_file.unlink
          end
        end
      end
    end
  ensure
    PDF_MUTEX.release
  end
end