lib/unicorn/http_response.rb

   1 # -*- encoding: binary -*-
   2 # :enddoc:
   3 # Writes a Rack response to your client using the HTTP/1.1 specification.
   4 # You use it by simply doing:
   5 #
   6 #   status, headers, body = rack_app.call(env)
   7 #   http_response_write(socket, status, headers, body)
   8 #
   9 # Most header correctness (including Content-Length and Content-Type)
  10 # is the job of Rack, with the exception of the "Date" and "Status" header.
  11 module Unicorn::HttpResponse
  12
  13   # Every standard HTTP code mapped to the appropriate message.
  14   CODES = Rack::Utils::HTTP_STATUS_CODES.inject({}) { |hash,(code,msg)|
  15     hash[code] = "#{code} #{msg}"
  16     hash
  17   }
  18   CRLF = "\r\n"
  19
  20   # writes the rack_response to socket as an HTTP response
  21   def http_response_write(socket, status, headers, body,
  22                           response_start_sent=false)
  23     status = CODES[status.to_i] || status
  24
  25     http_response_start = response_start_sent ? '' : 'HTTP/1.1 '
  26     if headers
  27       buf = "#{http_response_start}#{status}\r\n" \
  28             "Date: #{httpdate}\r\n" \
  29             "Status: #{status}\r\n" \
  30             "Connection: close\r\n"
  31       headers.each do |key, value|
  32         next if %r{\A(?:Date\z|Connection\z)}i =~ key
  33         if value =~ /\n/
  34           # avoiding blank, key-only cookies with /\n+/
  35           buf << value.split(/\n+/).map! { |v| "#{key}: #{v}\r\n" }.join
  36         else
  37           buf << "#{key}: #{value}\r\n"
  38         end
  39       end
  40       socket.write(buf << CRLF)
  41     end
  42
  43     body.each { |chunk| socket.write(chunk) }
  44     ensure
  45       body.respond_to?(:close) and body.close
  46   end
  47 end