unicorn.git  about / heads / tags
Rack HTTP server for Unix and fast clients
blob 579d957d39fd800fd5754c5e5df84bfb2ebad1c1 1675 bytes (raw)
$ git show v4.5.0:lib/unicorn/http_response.rb	# shows this blob on the CLI

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# -*- encoding: binary -*-
# :enddoc:
# Writes a Rack response to your client using the HTTP/1.1 specification.
# You use it by simply doing:
#
#   status, headers, body = rack_app.call(env)
#   http_response_write(socket, status, headers, body)
#
# Most header correctness (including Content-Length and Content-Type)
# is the job of Rack, with the exception of the "Date" and "Status" header.
module Unicorn::HttpResponse

  # Every standard HTTP code mapped to the appropriate message.
  CODES = Rack::Utils::HTTP_STATUS_CODES.inject({}) { |hash,(code,msg)|
    hash[code] = "#{code} #{msg}"
    hash
  }
  CRLF = "\r\n"

  def err_response(code, response_start_sent)
    "#{response_start_sent ? '' : 'HTTP/1.1 '}#{CODES[code]}\r\n\r\n"
  end

  # writes the rack_response to socket as an HTTP response
  def http_response_write(socket, status, headers, body,
                          response_start_sent=false)
    status = CODES[status.to_i] || status

    http_response_start = response_start_sent ? '' : 'HTTP/1.1 '
    if headers
      buf = "#{http_response_start}#{status}\r\n" \
            "Date: #{httpdate}\r\n" \
            "Status: #{status}\r\n" \
            "Connection: close\r\n"
      headers.each do |key, value|
        next if %r{\A(?:Date\z|Connection\z)}i =~ key
        if value =~ /\n/
          # avoiding blank, key-only cookies with /\n+/
          buf << value.split(/\n+/).map! { |v| "#{key}: #{v}\r\n" }.join
        else
          buf << "#{key}: #{value}\r\n"
        end
      end
      socket.write(buf << CRLF)
    end

    body.each { |chunk| socket.write(chunk) }
    ensure
      body.respond_to?(:close) and body.close
  end
end

git clone https://yhbt.net/unicorn.git