Mercurial > xib

annotate bridge.py @ 57:ebd4278e472f

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Some thread safety for irclib.py Signed-off-by: Charly COSTE <changaco@changaco.net>
author Charly COSTE <changaco@changaco.net>
date Thu, 27 Aug 2009 22:33:25 +0200
parents b048c4c03b00
children d8941159fd44
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python
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2 # -*- coding: utf-8 -*-
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3
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4 # This program is free software: you can redistribute it and/or modify
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5 # it under the terms of the GNU General Public License as published by
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6 # the Free Software Foundation, either version 3 of the License, or
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7 # (at your option) any later version.
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8 #
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9 # This program is distributed in the hope that it will be useful,
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10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 # GNU General Public License for more details.
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13 #
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14 # You should have received a copy of the GNU General Public License
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15 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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16
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17
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18 import muc
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19 xmpp = muc.xmpp
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20 del muc
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21 from participant import *
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22 from encoding import *
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23 import traceback
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24 import re
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25 import threading
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28 class NoSuchParticipantException(Exception): pass
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29
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30
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31 class bridge:
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32
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33 _all = 0
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34 _info = 1
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35 _notice = 2
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36 _warning = 3
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37 _error = 4
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38 _nothing = 5
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39 _modes = ['normal', 'limited', 'minimal']
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41
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42 def __init__(self, owner_bot, xmpp_room_jid, irc_room, irc_server, mode, say_level, irc_port=6667):
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43 """Create a new bridge."""
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44 self.bot = owner_bot
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45 self.irc_server = irc_server
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46 self.irc_port = irc_port
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47 self.irc_room = irc_room.lower()
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48 if hasattr(self.__class__, '_'+say_level):
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49 self.say_level = getattr(self.__class__, '_'+say_level)
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50 else:
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51 raise Exception('[Error] "'+say_level+'" is not a correct value for a bridge\'s "say_level" attribute')
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52 self.participants = []
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53 if mode not in self.__class__._modes:
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54 raise Exception('[Error] "'+mode+'" is not a correct value for a bridge\'s "mode" attribute')
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55 self.mode = mode
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56
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57 self.lock = threading.RLock()
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58
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59 # Join XMPP room
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60 try:
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61 self.xmpp_room = xmpp.muc(xmpp_room_jid)
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62 self.xmpp_room.join(self.bot.xmpp_c, self.bot.nickname, callback=self._xmpp_join_callback)
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63 except:
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64 self.bot.error('[Error] joining XMPP room failed')
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65 raise
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67 # Join IRC room
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68 try:
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69 self.irc_connections_limit = -1
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70 self.irc_connection = self.bot.irc.server(irc_server, irc_port, self.bot.nickname)
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71 self.irc_connection.connect(nick_callback=self._irc_nick_callback)
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72 except:
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73 self.bot.error('[Error] joining IRC room failed')
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74 raise
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76 self.bot.error('[Notice] bridge "'+str(self)+'" is running in '+self.mode+' mode and a say_level of "'+say_level+'"')
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78
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79 def _irc_nick_callback(self, error, arguments=[]):
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80 if error == None:
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81 self.irc_connection.join(self.irc_room)
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82 self.bot.error('===> Debug: successfully connected on IRC side of bridge "'+str(self)+'"', debug=True)
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83 self.say('[Notice] bridge "'+str(self)+'" is running in '+self.mode+' mode', on_xmpp=False)
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84 if error == 'nicknameinuse':
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85 self.bot.error('[Error] "'+self.bot.nickname+'" is already used in the IRC chan or reserved on the IRC server of bridge "'+str(self)+'"')
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86 raise Exception('[Error] "'+self.bot.nickname+'" is already used in the IRC chan or reserved on the IRC server of bridge "'+str(self)+'"')
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87 elif error == 'erroneusnickname':
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88 self.bot.error('[Error] "'+self.bot.nickname+'" got "erroneusnickname" on bridge "'+str(self)+'"')
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89 raise Exception('[Error] "'+self.bot.nickname+'" got "erroneusnickname" on bridge "'+str(self)+'"')
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90 elif error == 'nicknametoolong':
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91 self.bot.error('[Error] "'+self.bot.nickname+'" got "nicknametoolong" on bridge "'+str(self)+'", limit seems to be '+str(arguments[0]))
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92 raise Exception('[Error] "'+self.bot.nickname+'" got "nicknametoolong" on bridge "'+str(self)+'", limit seems to be '+str(arguments[0]))
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93
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94
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95 def _xmpp_join_callback(self, errors):
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96 """Called by muc._xmpp_presence_handler"""
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97 if len(errors) == 0:
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98 self.bot.error('===> Debug: succesfully connected on XMPP side of bridge "'+str(self)+'"', debug=True)
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99 self.say('[Notice] bridge "'+str(self)+'" is running in '+self.mode+' mode', on_irc=False)
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100 for error in errors:
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101 try:
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102 raise error
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103 except xmpp.muc.NicknameConflict:
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104 self.bot.error('[Error] "'+self.nickname+'" is already used in the XMPP MUC or reserved on the XMPP server of bridge "'+str(self)+'"')
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105 raise Exception('[Error] "'+self.nickname+'" is already used in the XMPP MUC or reserved on the XMPP server of bridge "'+str(self)+'"')
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106
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107
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108 def addParticipant(self, protocol, nickname):
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109 """Add a participant to the bridge."""
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110 if (protocol == 'irc' and nickname == self.irc_connection.get_nickname()) or (protocol == 'xmpp' and nickname == self.xmpp_room.nickname):
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111 self.bot.error('===> Debug: not adding self ('+self.bot.nickname+') to bridge "'+str(self)+'"', debug=True)
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112 return
0
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113 try:
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114 p = self.getParticipant(nickname)
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115 if p.protocol != protocol:
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116 if protocol == 'irc':
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117 p.createDuplicateOnXMPP()
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118 elif protocol == 'xmpp':
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119 p.createDuplicateOnIRC()
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120 else:
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121 raise Exception('[Internal Error] bad protocol')
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122 return
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123 except NoSuchParticipantException:
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124 pass
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125 self.bot.error('===> Debug: adding participant "'+nickname+'" from "'+protocol+'" to bridge "'+str(self)+'"', debug=True)
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126 try:
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127 p = participant(self, protocol, nickname)
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128 except IOError:
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129 self.bot.error('===> Debug: IOError while adding participant "'+nickname+'" from "'+protocol+'" to bridge "'+str(self)+'", reconnectiong ...', debug=True)
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130 p.xmpp_c.reconnectAndReauth()
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131 except:
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132 self.bot.error('===> Debug: unknown error while adding participant "'+nickname+'" from "'+protocol+'" to bridge "'+str(self)+'"', debug=True)
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133 traceback.print_exc()
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134 return
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135 self.participants.append(p)
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136 if self.mode != 'normal' and protocol == 'xmpp':
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137 xmpp_participants_nicknames = self.get_participants_nicknames_list(protocols=['xmpp'])
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138 self.say('[Info] Participants on XMPP: '+' '.join(xmpp_participants_nicknames), on_xmpp=False)
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139 return p
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140
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141
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142 def getParticipant(self, nickname):
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143 """Returns a participant object if there is a participant using nickname in the bridge. Raises a NoSuchParticipantException otherwise."""
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144 self.lock.acquire()
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145 for participant_ in self.participants:
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146 if participant_.nickname == nickname:
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147 self.lock.release()
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148 return participant_
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149 self.lock.release()
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150 raise NoSuchParticipantException('there is no participant using the nickname "'+nickname+'" in this bridge')
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151
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152
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153 def get_participants_nicknames_list(self, protocols=['irc', 'xmpp']):
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154 """Returns a list of the nicknames of the bridge's participants that are connected on the XMPP side."""
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155 self.lock.acquire()
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156 participants_nicknames = []
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157 for p in self.participants:
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158 if p.protocol in protocols:
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159 participants_nicknames.append('"'+p.nickname+'"')
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160 self.lock.release()
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161 return participants_nicknames
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162
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163
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164 def removeParticipant(self, left_protocol, nickname, leave_message):
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165 """Remove the participant using nickname from the bridge. Raises a NoSuchParticipantException if nickname is not used in the bridge."""
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166
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167 was_on_both = None
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168 p = self.getParticipant(nickname)
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169 if p.protocol == 'xmpp':
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170 if left_protocol == 'irc':
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171 was_on_both = True
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172 elif left_protocol == 'xmpp':
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173 if p.irc_connection == None and self.mode == 'normal':
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174 was_on_both = True
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175 p.protocol = 'irc'
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176 p.createDuplicateOnXMPP()
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177 else:
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178 was_on_both = False
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179
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180 elif p.protocol == 'irc':
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181 if left_protocol == 'xmpp':
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182 was_on_both = True
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183 elif left_protocol == 'irc':
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184 if p.xmpp_c == None and self.mode != 'minimal':
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185 was_on_both = True
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186 p.protocol = 'xmpp'
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187 p.createDuplicateOnIRC()
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188 else:
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189 was_on_both = False
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190
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191 else:
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192 raise Exception('[Internal Error] bad protocol')
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193
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194 if was_on_both == True:
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195 self.bot.error('===> Debug: "'+nickname+'" was on both sides of bridge "'+str(self)+'" but left '+left_protocol, debug=True)
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196
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197 elif was_on_both == False:
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198 self.lock.acquire()
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199 self.bot.error('===> Debug: removing participant "'+nickname+'" from bridge "'+str(self)+'"', debug=True)
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200 self.participants.remove(p)
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201 p.leave(leave_message)
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202 del p
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203 i = 0
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204 for p in self.participants:
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205 if p.protocol == 'xmpp':
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206 i += 1
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207 self.lock.release()
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208 if left_protocol == 'xmpp':
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209 if self.irc_connections_limit != -1 and self.irc_connections_limit > i:
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210 self.switchFromLimitedToNormalMode()
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211 if self.mode != 'normal':
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212 xmpp_participants_nicknames = self.get_participants_nicknames_list(protocols=['xmpp'])
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213 self.say('[Info] Participants on XMPP: '+' '.join(xmpp_participants_nicknames), on_xmpp=False)
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214 elif left_protocol == 'irc':
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215 if self.mode == 'minimal':
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216 irc_participants_nicknames = self.get_participants_nicknames_list(protocols=['irc'])
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217 self.say('[Info] Participants on IRC: '+' '.join(irc_participants_nicknames), on_irc=False)
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218
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219 else:
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220 self.bot.error('=> Debug: Bad decision tree, p.protocol='+p.protocol+' left_protocol='+left_protocol+'\np.xmpp_c='+str(p.xmpp_c)+'\np.irc_connection='+str(p.irc_connection), debug=True)
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221
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222
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223 def say(self, message, on_irc=True, on_xmpp=True):
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224 """Make the bot say something."""
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225 if message[0] != '[':
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226 raise Exception('[Internal Error] message does not start with "["')
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227 if self.say_level == self.__class__._nothing:
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228 return
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229 level = re.findall('^\[(Info|Notice|Warning|Error)\]', message)
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230 if len(level) == 0:
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231 raise Exception('[Internal Error] unknown message importance "'+re.findall('^\[([^[\]]+)', message)[0]+'"')
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232 level = level[0].lower()
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233 if getattr(self.__class__, '_'+level) < self.say_level:
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234 return
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235 if on_xmpp == True:
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236 self.xmpp_room.say(message)
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237 if on_irc == True:
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238 self.irc_connection.privmsg(self.irc_room, message)
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239
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240
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241 def switchFromLimitedToNormalMode(self):
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242 if self.mode != 'normal-limited':
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243 return
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244 self.bot.error('===> Bridge is switching to normal mode.')
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245 self.say('[Notice] Bridge is switching to normal mode.')
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246 self.mode = 'normal'
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247 for p in self.participants:
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248 if p.protocol == 'xmpp':
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249 p.createDuplicateOnIRC()
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250
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251
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252 def switchFromNormalToLimitedMode(self):
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253 if self.mode != 'normal':
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254 return
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255 self.mode = 'normal-limited'
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256 i = 0
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257 for p in self.participants:
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258 if p.protocol == 'xmpp':
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259 i += 1
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260 if p.irc_connection != None:
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261 p.irc_connection.close('Bridge is switching to limited mode')
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262 p.irc_connection = None
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263 self.irc_connections_limit = i
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264 self.bot.error('===> Bridge is switching to limited mode. Limit seems to be '+str(self.irc_connections_limit)+' on "'+self.irc_server+'".')
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265 self.say('[Warning] Bridge is switching to limited mode, it means that it will be transparent for XMPP users but not for IRC users, this is due to the IRC servers\' per-IP-address connections\' limit number which seems to be '+str(self.irc_connections_limit)+' on "'+self.irc_server+'".')
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266 xmpp_participants_nicknames = self.get_participants_nicknames_list(protocols=['xmpp'])
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267 self.say('[Info] Participants on XMPP: '+' '.join(xmpp_participants_nicknames), on_xmpp=False)
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268
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269
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270 def __str__(self):
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271 return self.irc_room+'@'+self.irc_server+' <-> '+self.xmpp_room.room_jid
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272
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273
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274 def __del__(self):
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275 # Delete participants objects
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276 for p in self.participants:
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277 p.leave('Removing bridge')
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278 del p
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279 del self.participants
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280
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281 # Close IRC connection if not used by an other bridge, just leave the room otherwise
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282 self.irc_connection.used_by -= 1
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283 if self.irc_connection.used_by < 1:
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284 self.irc_connection.close('Removing bridge')
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285 else:
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286 self.irc_connection.part('Removing bridge')
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287 del self.irc_connection
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288
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289 # Leave XMPP room
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290 self.xmpp_room.leave('Removing bridge')