class Fluent::Plugin::HttpInput::Handler

def send_response(code, header, body)
  header['Content-Length'] ||= body.bytesize
  header['Content-Type'] ||= 'text/plain'
  data = %[HTTP/1.1 #{code}\r\n]
  header.each_pair {|k,v|
    data << "#{k}: #{v}\r\n"
  }
  data << "\r\n"
  @io.write(data)
  @io.write(body)
end