1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
# frozen_string_literal: true
# Copyright, 2017, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require_relative 'socket'
require_relative 'stream'
require 'fcntl'
module Async
module IO
# Asynchronous TCP socket wrapper.
class TCPSocket < IPSocket
wraps ::TCPSocket
def initialize(remote_host, remote_port = nil, local_host = nil, local_port = nil)
if remote_host.is_a? ::TCPSocket
super(remote_host)
else
remote_address = Addrinfo.tcp(remote_host, remote_port)
local_address = Addrinfo.tcp(local_host, local_port) if local_host
# We do this unusual dance to avoid leaking an "open" socket instance.
socket = Socket.connect(remote_address, local_address: local_address)
fd = socket.fcntl(Fcntl::F_DUPFD)
Console.logger.debug(self) {"Connected to #{remote_address.inspect}: #{fd}"}
socket.close
super(::TCPSocket.for_fd(fd))
# The equivalent blocking operation. Unfortunately there is no trivial way to make this non-blocking.
# super(::TCPSocket.new(remote_host, remote_port, local_host, local_port))
end
@stream = Stream.new(self)
end
class << self
alias open new
end
def close
@stream.flush
super
end
include Peer
attr :stream
# The way this buffering works is pretty atrocious.
def_delegators :@stream, :gets, :puts
def sysread(size, buffer = nil)
data = @stream.read_partial(size)
if buffer
buffer.replace(data)
end
return data
end
end
# Asynchronous TCP server wrappper.
class TCPServer < TCPSocket
wraps ::TCPServer, :listen
def initialize(*args)
if args.first.is_a? ::TCPServer
super(args.first)
else
# We assume this operation doesn't block (for long):
super(::TCPServer.new(*args))
end
end
def accept(timeout: nil, task: Task.current)
peer, address = async_send(:accept_nonblock, timeout: timeout)
wrapper = TCPSocket.new(peer)
wrapper.timeout = self.timeout
return wrapper, address unless block_given?
begin
yield wrapper, address
ensure
wrapper.close
end
end
alias accept_nonblock accept
alias sysaccept accept
include Server
end
end
end
|
