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| | # Copyright (c) 2009 Eric Wong
# You can redistribute it and/or modify it under the same terms as Ruby.
# this class *must* be used with Rack::Chunked
module Unicorn::App
class Inetd
class CatBody
def initialize(env, cmd)
@cmd = cmd
@input, @errors = env['rack.input'], env['rack.errors']
in_rd, in_wr = IO.pipe
@err_rd, err_wr = IO.pipe
@out_rd, out_wr = IO.pipe
@cmd_pid = fork {
inp, out, err = (0..2).map { |i| IO.new(i) }
inp.reopen(in_rd)
out.reopen(out_wr)
err.reopen(err_wr)
[ in_rd, in_wr, @err_rd, err_wr, @out_rd, out_wr ].each { |io|
io.close
}
exec(*cmd)
}
[ in_rd, err_wr, out_wr ].each { |io| io.close }
[ in_wr, @err_rd, @out_rd ].each { |io| io.binmode }
in_wr.sync = true
# Unfortunately, input here must be processed inside a seperate
# thread/process using blocking I/O since env['rack.input'] is not
# IO.select-able and attempting to make it so would trip Rack::Lint
@inp_pid = fork {
[ @err_rd, @out_rd ].each { |io| io.close }
buf = Unicorn::Z.dup
# this is dependent on @input.read having readpartial semantics:
while @input.read(16384, buf)
in_wr.write(buf)
end
in_wr.close
}
in_wr.close
end
def each(&block)
buf = Unicorn::Z.dup
begin
rd, = IO.select([@err_rd, @out_rd])
rd && rd.first or next
if rd.include?(@err_rd)
begin
@errors.write(@err_rd.read_nonblock(16384, buf))
rescue Errno::EINTR
rescue Errno::EAGAIN
break
end while true
end
rd.include?(@out_rd) or next
begin
yield @out_rd.read_nonblock(16384, buf)
rescue Errno::EINTR
rescue Errno::EAGAIN
break
end while true
rescue EOFError,Errno::EPIPE,Errno::EBADF,Errno::EINVAL
break
end while true
self
end
def close
@input = nil
[ [ @cmd.inspect, @cmd_pid ], [ 'input streamer', @inp_pid ]
].each { |str, pid|
begin
pid, status = Process.waitpid2(pid)
status.success? or
@errors.write("#{str}: #{status.inspect} (PID:#{pid})\n")
rescue Errno::ECHILD
@errors.write("Failed to reap #{str} (PID:#{pid})\n")
end
}
end
end
def initialize(*cmd)
@cmd = cmd
end
def call(env)
expect = env[Unicorn::Const::HTTP_EXPECT] and
/\A100-continue\z/i =~ expect and
return [ 100, {} , [] ]
[ 200, { 'Content-Type' => 'application/octet-stream' },
CatBody.new(env, @cmd) ]
end
end
end
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