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server.rb
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server.rb
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require 'rubygems'
require 'rack'
require 'stringio'
require 'puma/thread_pool'
require 'puma/const'
require 'puma/events'
require 'puma_http11'
require 'socket'
module Puma
class Server
include Puma::Const
attr_reader :thread
attr_reader :events
attr_accessor :app
attr_accessor :min_threads
attr_accessor :max_threads
attr_accessor :persistent_timeout
# Creates a working server on host:port (strange things happen if port
# isn't a Number).
#
# Use HttpServer#run to start the server and HttpServer#acceptor.join to
# join the thread that's processing incoming requests on the socket.
#
def initialize(app, events=Events::DEFAULT)
@app = app
@events = events
@check, @notify = IO.pipe
@ios = [@check]
@running = false
@min_threads = 0
@max_threads = 16
@thread = nil
@thread_pool = nil
@persistent_timeout = PERSISTENT_TIMEOUT
@proto_env = {
"rack.version".freeze => Rack::VERSION,
"rack.errors".freeze => events.stderr,
"rack.multithread".freeze => true,
"rack.multiprocess".freeze => false,
"rack.run_once".freeze => true,
"SCRIPT_NAME".freeze => "",
"CONTENT_TYPE".freeze => "",
"QUERY_STRING".freeze => "",
SERVER_PROTOCOL => HTTP_11,
SERVER_SOFTWARE => PUMA_VERSION,
GATEWAY_INTERFACE => CGI_VER
}
end
if RUBY_PLATFORM =~ /linux/
# 6 == Socket::IPPROTO_TCP
# 3 == TCP_CORK
# 1/0 == turn on/off
def cork_socket(socket)
socket.setsockopt(6, 3, 1)
end
def uncork_socket(socket)
socket.setsockopt(6, 3, 0)
end
else
def cork_socket(socket)
end
def uncork_socket(socket)
end
end
def add_tcp_listener(host, port, optimize_for_latency=true)
s = TCPServer.new(host, port)
if optimize_for_latency
s.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
end
@ios << s
end
def add_unix_listener(path)
@ios << UNIXServer.new(path)
end
# Runs the server. It returns the thread used so you can "join" it.
# You can also access the HttpServer#acceptor attribute to get the
# thread later.
def run
BasicSocket.do_not_reverse_lookup = true
@running = true
@thread_pool = ThreadPool.new(@min_threads, @max_threads) do |client|
process_client(client)
end
@thread = Thread.new do
begin
check = @check
sockets = @ios
pool = @thread_pool
while @running
begin
ios = IO.select sockets
ios.first.each do |sock|
if sock == check
break if handle_check
else
pool << sock.accept
end
end
rescue Errno::ECONNABORTED
# client closed the socket even before accept
client.close rescue nil
rescue Object => e
@events.unknown_error self, env, e, "Listen loop"
end
end
graceful_shutdown
ensure
@ios.each { |i| i.close }
end
end
return @thread
end
def handle_check
cmd = @check.read(1)
case cmd
when STOP_COMMAND
@running = false
return true
end
return false
end
def process_client(client)
begin
while true
parser = HttpParser.new
env = @proto_env.dup
data = client.readpartial(CHUNK_SIZE)
nparsed = 0
# Assumption: nparsed will always be less since data will get filled
# with more after each parsing. If it doesn't get more then there was
# a problem with the read operation on the client socket.
# Effect is to stop processing when the socket can't fill the buffer
# for further parsing.
while nparsed < data.length
nparsed = parser.execute(env, data, nparsed)
if parser.finished?
cl = env[CONTENT_LENGTH]
return unless handle_request(env, client, parser.body, cl)
nparsed += parser.body.size if cl
if data.size > nparsed
data.slice!(0, nparsed)
parser = HttpParser.new
env = @proto_env.dup
nparsed = 0
else
unless IO.select([client], nil, nil, @persistent_timeout)
raise EOFError, "Timed out persistent connection"
end
end
else
# Parser is not done, queue up more data to read and continue parsing
chunk = client.readpartial(CHUNK_SIZE)
return if !chunk or chunk.length == 0 # read failed, stop processing
data << chunk
if data.length >= MAX_HEADER
raise HttpParserError,
"HEADER is longer than allowed, aborting client early."
end
end
end
end
rescue EOFError, SystemCallError
client.close rescue nil
rescue HttpParserError => e
@events.parse_error self, env, e
rescue StandardError => e
@events.unknown_error self, env, e, "Read"
ensure
begin
client.close
rescue IOError, SystemCallError
# Already closed
rescue StandardError => e
@events.unknown_error self, env, e, "Client"
end
end
end
def normalize_env(env, client)
if host = env[HTTP_HOST]
if colon = host.index(":")
env[SERVER_NAME] = host[0, colon]
env[SERVER_PORT] = host[colon+1, host.size]
else
env[SERVER_NAME] = host
env[SERVER_PORT] = PORT_80
end
end
unless env[REQUEST_PATH]
# it might be a dumbass full host request header
uri = URI.parse(env[REQUEST_URI])
env[REQUEST_PATH] = uri.path
raise "No REQUEST PATH" unless env[REQUEST_PATH]
end
env[PATH_INFO] = env[REQUEST_PATH]
# From http://www.ietf.org/rfc/rfc3875 :
# "Script authors should be aware that the REMOTE_ADDR and
# REMOTE_HOST meta-variables (see sections 4.1.8 and 4.1.9)
# may not identify the ultimate source of the request.
# They identify the client for the immediate request to the
# server; that client may be a proxy, gateway, or other
# intermediary acting on behalf of the actual source client."
#
env[REMOTE_ADDR] = client.peeraddr.last
end
EmptyBinary = ""
EmptyBinary.force_encoding("BINARY") if EmptyBinary.respond_to? :force_encoding
def handle_request(env, client, body, cl)
normalize_env env, client
if cl
body = read_body env, client, body, cl
return false unless body
else
body = StringIO.new(EmptyBinary)
end
env["rack.input"] = body
env["rack.url_scheme"] = env["HTTPS"] ? "https" : "http"
allow_chunked = false
if env['HTTP_VERSION'] == 'HTTP/1.1'
allow_chunked = true
http_version = "HTTP/1.1 "
keep_alive = env["HTTP_CONNECTION"] != "close"
include_keepalive_header = false
else
http_version = "HTTP/1.0 "
keep_alive = env["HTTP_CONNECTION"] == "Keep-Alive"
include_keepalive_header = keep_alive
end
chunked = false
after_reply = env['rack.after_reply'] = []
begin
begin
status, headers, res_body = @app.call(env)
rescue => e
status, headers, res_body = lowlevel_error(e)
end
content_length = nil
if res_body.kind_of? Array and res_body.size == 1
content_length = res_body[0].size
end
cork_socket client
client.write http_version
client.write status.to_s
client.write " "
client.write HTTP_STATUS_CODES[status]
client.write "\r\n"
colon = ": "
line_ending = "\r\n"
headers.each do |k, vs|
case k
when "Content-Length"
content_length = vs
next
when "Transfer-Encoding"
allow_chunked = false
content_length = nil
end
vs.split("\n").each do |v|
client.write k
client.write colon
client.write v
client.write line_ending
end
end
if include_keepalive_header
client.write "Connection: Keep-Alive\r\n"
elsif !keep_alive
client.write "Connection: close\r\n"
end
if content_length
client.write "Content-Length: #{content_length}\r\n"
elsif allow_chunked
client.write "Transfer-Encoding: chunked\r\n"
chunked = true
end
client.write line_ending
res_body.each do |part|
if chunked
client.write part.size.to_s(16)
client.write line_ending
client.write part
client.write line_ending
else
client.write part
end
client.flush
end
if chunked
client.write "0"
client.write line_ending
client.write line_ending
client.flush
end
ensure
uncork_socket client
body.close
res_body.close if res_body.respond_to? :close
after_reply.each { |o| o.call }
end
return keep_alive
end
def read_body(env, client, body, cl)
content_length = cl.to_i
remain = content_length - body.size
return StringIO.new(body) if remain <= 0
# Use a Tempfile if there is a lot of data left
if remain > MAX_BODY
stream = Tempfile.new(Const::PUMA_TMP_BASE)
stream.binmode
else
stream = StringIO.new
end
stream.write body
# Read an odd sized chunk so we can read even sized ones
# after this
chunk = client.readpartial(remain % CHUNK_SIZE)
# No chunk means a closed socket
unless chunk
stream.close
return nil
end
remain -= stream.write(chunk)
# Raed the rest of the chunks
while remain > 0
chunk = client.readpartial(CHUNK_SIZE)
unless chunk
stream.close
return nil
end
remain -= stream.write(chunk)
end
stream.rewind
return stream
end
def lowlevel_error(e)
[500, {}, ["No application configured"]]
end
# Wait for all outstanding requests to finish.
def graceful_shutdown
@thread_pool.shutdown if @thread_pool
end
# Stops the acceptor thread and then causes the worker threads to finish
# off the request queue before finally exiting.
def stop(sync=false)
@notify << STOP_COMMAND
@thread.join if @thread && sync
end
def attempt_bonjour(name)
begin
require 'dnssd'
rescue LoadError
return false
end
@bonjour_registered = false
announced = false
@ios.each do |io|
if io.kind_of? TCPServer
fixed_name = name.gsub(/\./, "-")
DNSSD.announce io, "puma - #{fixed_name}", "http" do |r|
@bonjour_registered = true
end
announced = true
end
end
return announced
end
def bonjour_registered?
@bonjour_registered ||= false
end
end
end