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puma--puma/lib/puma/client.rb
2016-01-11 09:14:56 -08:00

320 lines
6.5 KiB
Ruby

class IO
# We need to use this for a jruby work around on both 1.8 and 1.9.
# So this either creates the constant (on 1.8), or harmlessly
# reopens it (on 1.9).
module WaitReadable
end
end
require 'puma/detect'
if Puma::IS_JRUBY
# We have to work around some OpenSSL buffer/io-readiness bugs
# so we pull it in regardless of if the user is binding
# to an SSL socket
require 'openssl'
end
module Puma
class ConnectionError < RuntimeError; end
class Client
include Puma::Const
def initialize(io, env=nil)
@io = io
@to_io = io.to_io
@proto_env = env
if !env
@env = nil
else
@env = env.dup
end
@parser = HttpParser.new
@parsed_bytes = 0
@read_header = true
@ready = false
@body = nil
@buffer = nil
@tempfile = nil
@timeout_at = nil
@requests_served = 0
@hijacked = false
@peerip = nil
@remote_addr_header = nil
end
attr_reader :env, :to_io, :body, :io, :timeout_at, :ready, :hijacked,
:tempfile
attr_writer :peerip
attr_accessor :remote_addr_header
def inspect
"#<Puma::Client:0x#{object_id.to_s(16)} @ready=#{@ready.inspect}>"
end
# For the hijack protocol (allows us to just put the Client object
# into the env)
def call
@hijacked = true
env[HIJACK_IO] ||= @io
end
def in_data_phase
!@read_header
end
def set_timeout(val)
@timeout_at = Time.now + val
end
def reset(fast_check=true)
@parser.reset
@read_header = true
@env = @proto_env.dup
@body = nil
@tempfile = nil
@parsed_bytes = 0
@ready = false
if @buffer
@parsed_bytes = @parser.execute(@env, @buffer, @parsed_bytes)
if @parser.finished?
return setup_body
elsif @parsed_bytes >= MAX_HEADER
raise HttpParserError,
"HEADER is longer than allowed, aborting client early."
end
return false
elsif fast_check &&
IO.select([@to_io], nil, nil, FAST_TRACK_KA_TIMEOUT)
return try_to_finish
end
end
def close
begin
@io.close
rescue IOError
end
end
# The object used for a request with no body. All requests with
# no body share this one object since it has no state.
EmptyBody = NullIO.new
def setup_body
@in_data_phase = true
body = @parser.body
cl = @env[CONTENT_LENGTH]
unless cl
@buffer = body.empty? ? nil : body
@body = EmptyBody
@requests_served += 1
@ready = true
return true
end
remain = cl.to_i - body.bytesize
if remain <= 0
@body = StringIO.new(body)
@buffer = nil
@requests_served += 1
@ready = true
return true
end
if remain > MAX_BODY
@body = Tempfile.new(Const::PUMA_TMP_BASE)
@body.binmode
@tempfile = @body
else
# The body[0,0] trick is to get an empty string in the same
# encoding as body.
@body = StringIO.new body[0,0]
end
@body.write body
@body_remain = remain
@read_header = false
return false
end
def try_to_finish
return read_body unless @read_header
begin
data = @io.read_nonblock(CHUNK_SIZE)
rescue Errno::EAGAIN
return false
rescue SystemCallError, IOError
raise ConnectionError, "Connection error detected during read"
end
if @buffer
@buffer << data
else
@buffer = data
end
@parsed_bytes = @parser.execute(@env, @buffer, @parsed_bytes)
if @parser.finished?
return setup_body
elsif @parsed_bytes >= MAX_HEADER
raise HttpParserError,
"HEADER is longer than allowed, aborting client early."
end
false
end
if IS_JRUBY
def jruby_start_try_to_finish
return read_body unless @read_header
begin
data = @io.sysread_nonblock(CHUNK_SIZE)
rescue OpenSSL::SSL::SSLError => e
return false if e.kind_of? IO::WaitReadable
raise e
end
if @buffer
@buffer << data
else
@buffer = data
end
@parsed_bytes = @parser.execute(@env, @buffer, @parsed_bytes)
if @parser.finished?
return setup_body
elsif @parsed_bytes >= MAX_HEADER
raise HttpParserError,
"HEADER is longer than allowed, aborting client early."
end
false
end
def eagerly_finish
return true if @ready
if @io.kind_of? OpenSSL::SSL::SSLSocket
return true if jruby_start_try_to_finish
end
return false unless IO.select([@to_io], nil, nil, 0)
try_to_finish
end
else
def eagerly_finish
return true if @ready
return false unless IO.select([@to_io], nil, nil, 0)
try_to_finish
end
end # IS_JRUBY
def finish
return true if @ready
until try_to_finish
IO.select([@to_io], nil, nil)
end
true
end
def read_body
# Read an odd sized chunk so we can read even sized ones
# after this
remain = @body_remain
if remain > CHUNK_SIZE
want = CHUNK_SIZE
else
want = remain
end
begin
chunk = @io.read_nonblock(want)
rescue Errno::EAGAIN
return false
rescue SystemCallError, IOError
raise ConnectionError, "Connection error detected during read"
end
# No chunk means a closed socket
unless chunk
@body.close
@buffer = nil
@requests_served += 1
@ready = true
raise EOFError
end
remain -= @body.write(chunk)
if remain <= 0
@body.rewind
@buffer = nil
@requests_served += 1
@ready = true
return true
end
@body_remain = remain
false
end
def write_400
begin
@io << ERROR_400_RESPONSE
rescue StandardError
end
end
def write_408
begin
@io << ERROR_408_RESPONSE
rescue StandardError
end
end
def write_500
begin
@io << ERROR_500_RESPONSE
rescue StandardError
end
end
def peerip
return @peerip if @peerip
if @remote_addr_header
hdr = (@env[@remote_addr_header] || LOCALHOST_ADDR).split(/[\s,]/).first
@peerip = hdr
return hdr
end
@peerip ||= @io.peeraddr.last
end
end
end