--- /dev/null
+# server.rb --- A simple IPC server executing Ruby programs.
+# Copyright (C) 1998-2005 Daiki Ueno
+
+# Author: Daiki Ueno <ueno@unixuser.org>
+# Created: 1998-09-28
+# Keywords: IRC, riece, Ruby
+
+# This file is part of Riece.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with GNU Emacs; see the file COPYING. If not, write to the
+# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.
+
+require 'thread'
+require 'stringio'
+
+class Server
+ def initialize(outfile, errfile, logfile)
+ @out = $stdout
+ @err = $stderr
+ $stdout = outfile ? File.new(outfile, 'a') : StringIO.new
+ $stderr = errfile ? File.new(errfile, 'a') : StringIO.new
+ @log = File.new(logfile, 'a') if logfile
+
+ @buf = ''
+ @que = Queue.new
+ @thr = Hash.new
+ @cnt = 0
+ end
+
+ def dispatch(line)
+ @log.puts(line) if @log
+ case line.chomp
+ when /\AD /
+ @buf << $'
+ when /\A(\S+)\s*/
+ c = $1
+ r = $'
+ d = "dispatch_#{c.downcase}"
+ if respond_to?(d, true)
+ Thread.start do
+ self.send(d, c, r)
+ end
+ else
+ send_line("ERR 103 Unknown command\r\n")
+ end
+ end
+ end
+
+ def dispatch_cancel(c, r)
+ send_line("ERR 100 Not implemented\r\n")
+ end
+
+ def dispatch_bye(c, r)
+ send_line("ERR 100 Not implemented\r\n")
+ end
+
+ def dispatch_auth(c, r)
+ send_line("ERR 100 Not implemented\r\n")
+ end
+
+ def dispatch_reset(c, r)
+ send_line("ERR 100 Not implemented\r\n")
+ end
+
+ def dispatch_end(c, r)
+ enq_data
+ end
+
+ def dispatch_help(c, r)
+ send_line("ERR 100 Not implemented\r\n")
+ end
+
+ def dispatch_quit(c, r)
+ send_line("ERR 100 Not implemented\r\n")
+ end
+
+ def dispatch_eval(c, r)
+ r = deq_data if r.empty?
+ name = nil
+ Thread.exclusive do
+ while @thr.include?(name = @cnt.to_s)
+ @cnt += 1
+ end
+ @thr[name] = Thread.current
+ end
+ send_line("S name #{name}\r\n")
+ send_line("OK\r\n")
+ Thread.current[:rubyserv_name] = name
+ begin
+ Thread.current[:rubyserv_error] = false
+ Thread.current[:rubyserv_response] = eval(r, exec_env.empty_binding)
+ rescue Exception => e
+ Thread.current[:rubyserv_error] = true
+ Thread.current[:rubyserv_response] =
+ e.to_s.sub(/\A.*?\n#{Regexp.quote(__FILE__)}:\d+: /o, '')
+ end
+ send_line("# exit #{name}\r\n")
+ end
+
+ def dispatch_poll(c, r)
+ thr = @thr[r]
+ if !thr
+ send_line("ERR 105 Parameter error: no such name \"#{r}\"\r\n")
+ elsif thr.alive?
+ send_line("S running #{r}\r\n")
+ send_line("OK\r\n")
+ else
+ if thr[:rubyserv_error]
+ send_line("S exited #{r}\r\n")
+ else
+ send_line("S finished #{r}\r\n")
+ end
+ if d = thr[:rubyserv_response]
+ send_data(d.to_s)
+ end
+ send_line("OK\r\n")
+ end
+ end
+
+ def dispatch_exit(c, r)
+ thr = @thr[r]
+ if !thr
+ send_line("ERR 105 Parameter error: no such name \"#{r}\"\r\n")
+ return
+ end
+ thr.kill if thr.alive?
+ @thr.delete(r)
+ send_line("OK\r\n")
+ end
+
+ def escape(s)
+ s.gsub(/[%\r\n]/) {|m| '%%%02X' % m[0]}
+ end
+
+ def unescape(s)
+ s.gsub(/%([0-9A-Z][0-9A-Z])/) {[$1].pack('H*')}
+ end
+
+ def send_data(d)
+ d = escape(d)
+ begin
+ len = [d.length, 998].min # 998 = 1000 - "D "
+ send_line("D #{d[0 ... len]}\r\n")
+ d = d[len .. -1]
+ end until d.empty?
+ end
+
+ def enq_data
+ d = unescape(@buf)
+ @buf = ''
+ @que.enq(d)
+ end
+
+ def deq_data
+ @que.deq
+ end
+
+ def send_line(line)
+ @out.puts(line)
+ @log.puts(line) if @log
+ end
+
+ def exec_env
+ env = Object.new
+ def env.empty_binding
+ binding
+ end
+ out, log = @out, @log
+ env.instance_eval {@out, @log = out, log}
+ def env.send_line(line)
+ @out.puts(line)
+ @log.puts(line) if @log
+ end
+ def env.output(s)
+ send_line("# output #{Thread.current[:rubyserv_name]} #{s}\r\n")
+ end
+ env
+ end
+end
+
+if $0 == __FILE__
+ require 'optparse'
+
+ opt_outfile, opt_errfile, opt_logfile = nil, nil, nil
+ opts = OptionParser.new do |opts|
+ opts.banner = <<"End"
+Usage: #{$0} [OPTIONS]
+End
+ opts.on('-o', '--out OUTFILE', 'Send stdout to OUTFILE.') do |outfile|
+ opt_outfile = outfile
+ end
+ opts.on('-e', '--err ERRFILE', 'Send stderr to ERRFILE.') do |errfile|
+ opt_errfile = errfile
+ end
+ opts.on('-l', '--log LOGFILE', 'Send log to LOGFILE.') do |logfile|
+ opt_logfile = logfile
+ end
+ opts.on_tail('--help', '-h', 'Show this message.') do
+ $stdout.print(opts.to_s)
+ exit(0)
+ end
+ end
+ begin
+ opts.parse!(ARGV)
+ rescue OptionParser::ParseError
+ $stderr.print(opts.to_s)
+ exit(1)
+ end
+
+ server = Server.new(opt_outfile, opt_errfile, opt_logfile)
+ while gets
+ server.dispatch($_)
+ end
+end
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