source: skype/skyped.py @ d24b73f

#!/usr/bin/env python
# 
#   skyped.py
#  
#   Copyright (c) 2007, 2008 by Miklos Vajna <vmiklos@frugalware.org>
#
#   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 of the License, 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 this program; if not, write to the Free Software
#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
#   USA.
#

import sys
import os
import signal
import locale
import time
import gobject
import socket
import getopt
import Skype4Py
import sha
from ConfigParser import ConfigParser
from OpenSSL import SSL
from traceback import print_exception

__version__ = "0.1.1"

SKYPE_SERVICE = 'com.Skype.API'
CLIENT_NAME = 'SkypeApiPythonShell'

def eh(type, value, tb):
        if type != KeyboardInterrupt:
                print_exception(type, value, tb)
        gobject.MainLoop().quit()
        skype.skype.Client.Shutdown()
        sys.exit("Exiting.")

sys.excepthook = eh

def input_handler(fd, io_condition):
        global options
        if options.buf:
                for i in options.buf:
                        skype.send(i.strip())
                options.buf = None
        else:
                try:
                        input = fd.recv(1024)
                except SSL.SysCallError:
                        return True
                for i in input.split("\n"):
                        skype.send(i.strip())
                return True

def idle_handler(skype):
        try:
                c = skype.skype.Command("PING", Block=True)
                skype.skype.SendCommand(c)
        except Skype4Py.SkypeAPIError, s:
                dprint("Warning, pinging Skype failed (%s)." % (s))
                time.sleep(2)
        return True

def server(host, port):
        global options

        ctx = SSL.Context(SSL.TLSv1_METHOD)
        ctx.use_privatekey_file(options.config.sslkey)
        ctx.use_certificate_file(options.config.sslcert)
        sock = SSL.Connection(ctx, socket.socket())
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        sock.bind((host, port))
        sock.listen(1)
        gobject.io_add_watch(sock, gobject.IO_IN, listener)

def listener(sock, *args):
        global options
        options.conn, addr = sock.accept()
        ret = 0
        line = options.conn.recv(1024)
        if line.startswith("USERNAME") and line.split(' ')[1].strip() == options.config.username:
                ret += 1
        line = options.conn.recv(1024)
        if line.startswith("PASSWORD") and sha.sha(line.split(' ')[1].strip()).hexdigest() == options.config.password:
                ret += 1
        if ret == 2:
                dprint("Username and password OK.")
                options.conn.send("PASSWORD OK\n")
                gobject.io_add_watch(options.conn, gobject.IO_IN, input_handler)
                return True
        else:
                dprint("Username and/or password WRONG.")
                options.conn.send("PASSWORD KO\n")
                return False

def dprint(msg):
        global options

        if options.debug:
                print msg

class SkypeApi():
        def __init__(self):
                self.skype = Skype4Py.Skype()
                self.skype.OnNotify = self.recv
                self.skype.Client.Start()

        def recv(self, msg_text):
                global options
                if msg_text == "PONG":
                        return
                if "\n" in msg_text:
                        # crappy skype prefixes only the first line for
                        # multiline messages so we need to do so for the other
                        # lines, too. this is something like:
                        # 'CHATMESSAGE id BODY first line\nsecond line' ->
                        # 'CHATMESSAGE id BODY first line\nCHATMESSAGE id BODY second line'
                        prefix = " ".join(msg_text.split(" ")[:3])
                        msg_text = ["%s %s" % (prefix, i) for i in " ".join(msg_text.split(" ")[3:]).split("\n")]
                else:
                        msg_text = [msg_text]
                for i in msg_text:
                        # use utf-8 here to solve the following problem:
                        # people use env vars like LC_ALL=en_US (latin1) then
                        # they complain about why can't they receive latin2
                        # messages.. so here it is: always use utf-8 then
                        # everybody will be happy
                        e = i.encode('UTF-8')
                        dprint('<< ' + e)
                        if options.conn:
                                try:
                                        options.conn.send(e + "\n")
                                except IOError, s:
                                        dprint("Warning, sending '%s' failed (%s)." % (e, s))

        def send(self, msg_text):
                if not len(msg_text):
                        return
                e = msg_text.decode(locale.getdefaultlocale()[1])
                dprint('>> ' + e)
                try:
                        c = self.skype.Command(e, Block=True)
                        self.skype.SendCommand(c)
                        self.recv(c.Reply)
                except Skype4Py.SkypeError:
                        pass
                except Skype4Py.SkypeAPIError, s:
                        dprint("Warning, sending '%s' failed (%s)." % (e, s))

class Options:
        def __init__(self):
                self.cfgpath = "/usr/local/etc/skyped/skyped.conf"
                self.daemon = True
                self.debug = False
                self.help = False
                self.host = "0.0.0.0"
                self.port = 2727
                self.version = False
                # well, this is a bit hackish. we store the socket of the last connected client
                # here and notify it. maybe later notify all connected clients?
                self.conn = None
                # this will be read first by the input handler
                self.buf = None


        def usage(self, ret):
                print """Usage: skyped [OPTION]...

skyped is a daemon that acts as a tcp server on top of a Skype instance.

Options:
        -c      --config        path to configuration file (default: %s)
        -d      --debug         enable debug messages
        -h      --help          this help
        -H      --host          set the tcp host (default: %s)
        -n      --nofork        don't run as daemon in the background
        -p      --port          set the tcp port (default: %d)
        -v      --version       display version information""" % (self.cfgpath, self.host, self.port)
                sys.exit(ret)

if __name__=='__main__':
        options = Options()
        try:
                opts, args = getopt.getopt(sys.argv[1:], "c:dhH:np:v", ["config=", "daemon", "help", "host=", "nofork", "port=", "version"])
        except getopt.GetoptError:
                options.usage(1)
        for opt, arg in opts:
                if opt in ("-c", "--config"):
                        options.cfgpath = arg
                elif opt in ("-d", "--debug"):
                        options.debug = True
                elif opt in ("-h", "--help"):
                        options.help = True
                elif opt in ("-H", "--host"):
                        options.host = arg
                elif opt in ("-n", "--nofork"):
                        options.daemon = False
                elif opt in ("-p", "--port"):
                        options.port = arg
                elif opt in ("-v", "--version"):
                        options.version = True
        if options.help:
                options.usage(0)
        elif options.version:
                print "skyped %s" % __version__
                sys.exit(0)
        # parse our config
        if not os.path.exists(options.cfgpath):
                print "Can't find configuration file at '%s'." % options.cfgpath
                print "Use the -c option to specify an alternate one."
                sys.exit(1)
        options.config = ConfigParser()
        options.config.read(options.cfgpath)
        options.config.username = options.config.get('skyped', 'username').split('#')[0]
        options.config.password = options.config.get('skyped', 'password').split('#')[0]
        options.config.sslkey = options.config.get('skyped', 'key').split('#')[0]
        options.config.sslcert = options.config.get('skyped', 'cert').split('#')[0]
        dprint("Parsing config file '%s' done, username is '%s'." % (options.cfgpath, options.config.username))
        if options.daemon:
                pid = os.fork()
                if pid == 0:
                        nullin = file('/dev/null', 'r')
                        nullout = file('/dev/null', 'w')
                        os.dup2(nullin.fileno(), sys.stdin.fileno())
                        os.dup2(nullout.fileno(), sys.stdout.fileno())
                        os.dup2(nullout.fileno(), sys.stderr.fileno())
                else:
                        print 'skyped is started on port %s, pid: %d' % (options.port, pid)
                        sys.exit(0)
        server(options.host, options.port)
        try:
                skype = SkypeApi()
        except Skype4Py.SkypeAPIError, s:
                sys.exit("%s. Are you sure you have started Skype?" % s)
        gobject.idle_add(idle_handler, skype)
        gobject.MainLoop().run()