4 require 'unicorn/http11'
11 # default parameters we merge into the request env for Rack handlers
13 "rack.errors" => $stderr,
14 "rack.multiprocess" => true,
15 "rack.multithread" => false,
16 "rack.run_once" => false,
17 "rack.version" => [1, 0].freeze,
18 "SCRIPT_NAME" => "".freeze,
20 # some applications (like Echo) may want to change this to true
21 # We disable streaming by default since some (arguably broken)
22 # applications may not ever read the entire body and be confused
23 # when it receives a response after nothing has been sent to it.
24 Const::STREAM_INPUT => false,
25 # this is not in the Rack spec, but some apps may rely on it
26 "SERVER_SOFTWARE" => "Unicorn #{Const::UNICORN_VERSION}".freeze
30 Z.force_encoding(Encoding::BINARY) if Z.respond_to?(:force_encoding)
31 NULL_IO = StringIO.new(Z)
33 DECHUNKER = ChunkedReader.new
34 LOCALHOST = '127.0.0.1'.freeze
36 # Being explicitly single-threaded, we have certain advantages in
37 # not having to worry about variables being clobbered :)
38 BUFFER = ' ' * Const::CHUNK_SIZE # initial size, may grow
39 PARSER = HttpParser.new
42 def initialize(logger = Configurator::DEFAULT_LOGGER)
46 # Does the majority of the IO processing. It has been written in
47 # Ruby using about 8 different IO processing strategies.
49 # It is currently carefully constructed to make sure that it gets
50 # the best possible performance for the common case: GET requests
51 # that are fully complete after a single read(2)
53 # Anyone who thinks they can make it faster is more than welcome to
56 # returns an environment hash suitable for Rack if successful
57 # This does minimal exception trapping and it is up to the caller
58 # to handle any socket errors (e.g. user aborted upload).
63 # From http://www.ietf.org/rfc/rfc3875:
64 # "Script authors should be aware that the REMOTE_ADDR and
65 # REMOTE_HOST meta-variables (see sections 4.1.8 and 4.1.9)
66 # may not identify the ultimate source of the request. They
67 # identify the client for the immediate request to the server;
68 # that client may be a proxy, gateway, or other intermediary
69 # acting on behalf of the actual source client."
70 PARAMS[Const::REMOTE_ADDR] =
71 TCPSocket === socket ? socket.peeraddr.last : LOCALHOST
73 # short circuit the common case with small GET requests first
74 PARSER.execute(PARAMS, socket.readpartial(Const::CHUNK_SIZE, BUFFER)) and
75 return handle_body(socket)
77 data = BUFFER.dup # socket.readpartial will clobber BUFFER
79 # Parser is not done, queue up more data to read and continue parsing
80 # an Exception thrown from the PARSER will throw us out of the loop
82 data << socket.readpartial(Const::CHUNK_SIZE, BUFFER)
83 PARSER.execute(PARAMS, data) and return handle_body(socket)
85 rescue HttpParserError => e
86 @logger.error "HTTP parse error, malformed request " \
87 "(#{PARAMS[Const::HTTP_X_FORWARDED_FOR] ||
88 PARAMS[Const::REMOTE_ADDR]}): #{e.inspect}"
89 @logger.error "REQUEST DATA: #{data.inspect}\n---\n" \
90 "PARAMS: #{PARAMS.inspect}\n---\n"
96 # Handles dealing with the rest of the request
97 # returns a Rack environment if successful
98 def handle_body(socket)
99 http_body = PARAMS.delete(:http_body)
101 length = PARAMS[Const::CONTENT_LENGTH].to_i
102 if te = PARAMS[Const::HTTP_TRANSFER_ENCODING]
104 socket = DECHUNKER.reopen(socket, http_body)
105 length = http_body = nil
109 inp = TEE.reopen(socket, length, http_body)
110 PARAMS[Const::RACK_INPUT] =
111 DEFAULTS[Const::STREAM_INPUT] ? inp : inp.consume
112 PARAMS.update(DEFAULTS)