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#!/usr/bin/env ruby
# A WebSocket server that echos back whatever it receives from the client.
# Copyright 2011 Joel Martin
# Licensed under LGPL version 3 (see docs/LICENSE.LGPL-3)
require 'socket'
$: << "other"
$: << "../other"
require 'websocket'
class WebSocketEcho < WebSocketServer
# Echo back whatever is received
def new_client(client)
cqueue = []
c_pend = 0
rlist = [client]
loop do
wlist = []
if cqueue.length > 0 or c_pend
wlist << client
end
ins, outs, excepts = IO.select(rlist, wlist, nil, 1)
if excepts.length > 0
raise Exception, "Socket exception"
end
if outs.include?(client)
# Send queued data to the client
c_pend = send_frames(cqueue)
cqueue = []
end
if ins.include?(client)
# Receive client data, decode it, and send it back
frames, closed = recv_frames
cqueue += frames
if closed
raise EClose, closed
end
end
end # loop
end
end
port = ARGV[0].to_i
puts "Starting server on port #{port}"
server = WebSocketEcho.new('listen_port' => port, 'verbose' => true)
server.start
server.join
puts "Server has been terminated"
# vim: sw=2
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