1 # -*- encoding: binary -*-
4 module Rainbows::Epoll::Client
6 include Rainbows::EvCore
7 APP = Rainbows.server.app
8 Server = Rainbows::Epoll::Server
9 IN = SleepyPenguin::Epoll::IN | SleepyPenguin::Epoll::ET
10 OUT = SleepyPenguin::Epoll::OUT | SleepyPenguin::Epoll::ET
12 KATO.compare_by_identity if KATO.respond_to?(:compare_by_identity)
13 KEEPALIVE_TIMEOUT = Rainbows.keepalive_timeout
14 EP = Rainbows::Epoll::EP
15 @@last_expire = Time.now
18 return if ((now = Time.now) - @@last_expire) < 1.0
19 if (ot = KEEPALIVE_TIMEOUT) >= 0
21 KATO.delete_if { |client, time| time < ot and client.timeout! }
28 @wr_queue = [] # may contain String, ResponsePipe, and StreamFile objects
36 case rv = kgio_tryread(16384, RBUF)
39 return if @wr_queue[0] || closed?
41 KATO[self] = @@last_expire if :headers == @state
42 return EP.set(self, IN)
45 end until :close == @state
47 rescue Errno::ECONNRESET
52 def app_call input # called by on_read()
53 @env[RACK_INPUT] = input
54 @env[REMOTE_ADDR] = kgio_addr
55 status, headers, body = APP.call(@env.merge!(RACK_DEFAULTS))
56 ev_write_response(status, headers, body, @hp.next?)
59 def write_response_path(status, headers, body, alive)
64 defer_file(status, headers, body, alive, io, st)
65 elsif st.socket? || st.pipe?
66 chunk = stream_response_headers(status, headers, alive)
67 stream_response_body(body, io, chunk)
69 # char or block device... WTF?
70 write_response(status, headers, body, alive)
74 # used for streaming sockets and pipes
75 def stream_response_body(body, io, chunk)
76 pipe = (chunk ? Rainbows::Epoll::ResponseChunkPipe :
77 Rainbows::Epoll::ResponsePipe).new(io, self, body)
78 return @wr_queue << pipe if @wr_queue[0]
79 stream_pipe(pipe) or return
80 @wr_queue[0] or @wr_queue << Z
83 def ev_write_response(status, headers, body, alive)
84 if body.respond_to?(:to_path)
85 write_response_path(status, headers, body, alive)
87 write_response(status, headers, body, alive)
89 @state = alive ? :headers : :close
90 on_read(Z) if alive && 0 == @wr_queue.size && 0 != @buf.size
103 Rainbows::Epoll::ReRun << self
106 def on_deferred_write_complete
107 :close == @state and return close
108 0 == @buf.size ? on_readable : on_read(Z)
112 msg = Rainbows::Error.response(e) and kgio_trywrite(msg) rescue nil
117 def write_deferred(obj)
118 Rainbows::StreamFile === obj ? stream_file(obj) : stream_pipe(obj)
121 # writes until our write buffer is empty or we block
122 # returns true if we're done writing everything
124 obj = @wr_queue.shift
126 case rv = String === obj ? kgio_trywrite(obj) : write_deferred(obj)
128 obj = @wr_queue.shift or return on_deferred_write_complete
131 when :wait_writable # Strings and StreamFiles only
132 @wr_queue.unshift(obj)
144 case rv = kgio_trywrite(buf)
150 @wr_queue << buf.dup # >3-word 1.9 strings are copy-on-write
151 return EP.set(self, OUT)
154 @wr_queue << buf.dup # >3-word 1.9 strings are copy-on-write
158 @wr_queue.each { |x| x.respond_to?(:close) and x.close rescue nil }
173 def defer_file(status, headers, body, alive, io, st)
174 if r = sendfile_range(status, headers)
175 status, headers, range = r
176 write_headers(status, headers, alive)
177 range and defer_file_stream(range[0], range[1], io, body)
179 write_headers(status, headers, alive)
180 defer_file_stream(0, st.size, io, body)
184 # returns +nil+ on EOF, :wait_writable if the client blocks
185 def stream_file(sf) # +sf+ is a Rainbows::StreamFile object
186 case n = trysendfile(sf, sf.offset, sf.count)
189 0 == (sf.count -= n) and return sf.close
191 return n # :wait_writable or nil
198 def defer_file_stream(offset, count, io, body)
199 sf = Rainbows::StreamFile.new(offset, count, io, body)
201 stream_file(sf) or return
207 # this alternates between a push and pull model from the pipe -> client
208 # to avoid having too much data in userspace on either end.
209 def stream_pipe(pipe)
210 case buf = pipe.tryread
214 # client is blocked on write, client will pull from pipe later
220 # continue looping...
222 # pipe blocked on read, let the pipe push to the client in the future
227 return pipe.close # nil