how to download files with different extension with send_file command

Question

I have the following code, I want to download files of different mime types. Ie docx, pdf etc. I have defined my download action, then bellow am trying to get the file extension for which i direct it to the correct mimetype. But this doesnot seem to work

def download
    @uploadedfile = Uploadedfile.find(params[:id])
    send_data(
        @uploadedfile.upload_file.path,
        :filename => @uploadedfile.name,
       # :type => 'application/pdf',          
       # :type=>"*/*",
       # :type=> "application/vnd.openxmlformats-officedocument.wordprocessingml.document",     
       #:type=> MIME::Types.type_for(@uploadedfile.name).to_s, 
       #:content_type => %w(application/vnd.openxmlformats-officedocument.wordprocessingml.document application/pdf),                   
        :type=> file_extension,
        :stream => true,     
        :x_sendfile=>true,
        :url_based_filename => true 
    )               
    flash[:notice] = "The file has been downloaded"
  end  

  def file_extension
    @uploadedfile = Uploadedfile.find(params[:id])    
   # ext = File.extname("#{@uploadedfile.name}")   
    ext = File.extname(@uploadedfile.name)
    if (ext == ".pdf")           
        content_type = "application/pdf"
     elsif (ext == ".doc") || ( ext == ".rtf") || ( ext == ".docx")
        content_type = "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
     elsif (ext == ".txt")
        content_type = "text/Plain"
     elsif (ext == ".rar")
         content_type = "Application/x-rar-compressed"
     elsif (ext == ".jpeg" || ext==".jpg")
         content_type = "image/jpeg"
     else
         content_type = "Application/octet-stream"
     end
     content_type
  end

but this seems not to work, where am i going wrong? Please help

Answer 1

I solved this problem by making a slight change on the def file_extension to

def file_extension
    up = Uploadedfile.find(params[:id])   
    ext = File.extname("#{up.upload_file}")
    if (ext == ".pdf")           
        "application/pdf"
     elsif (ext == ".doc") || ( ext == ".rtf") || ( ext == ".docx")
        "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
     elsif (ext == ".txt")
        "text/Plain"
     elsif (ext == ".rar")
         "Application/x-rar-compressed"
     elsif (ext == ".jpeg" || ext==".jpg")
         "image/jpeg"
     else
        "Application/octet-stream"
     end     
  end

I changed this part to ext = File.extname(@uploadedfile.name) to ext = File.extname("#{up.upload_file}") where up = Uploadedfile.find(params[:id])