ruby-on-rails - 使用 rails send_data 发送 PDF

Question

我使用 ruby​​ 1.9.3 和 redmine 1.4.4

据此-> Please help me send a jpg file using send_data ，我在 Controller 中这样做:

  @file = temp.path
  File.open(@file, 'r') do |f|
    send_data f.read, :filename => "myfile.pdf", :type => "application/pdf", :disposition => "attachment"
  end
  File.delete(@file)

但它返回ArgumentError(UTF-8 中的无效字节序列)，为什么？

Answer 1

PDF文件必须被编码

 file = temp.path
 File.open(file, 'r') do |f|
   send_data f.read.force_encoding('BINARY'), :filename => filename, :type => "application/pdf", :disposition => "attachment"
 end
 File.delete(file)