Mercurial > libervia-backend

annotate libervia/backend/bridge/pb.py @ 4194:3dbaf179c50d

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core (launcher): new `wait_for_service` option: if `wait_for_service` is used in `[DEFAULT]`, the service at the specified host/port is waited for before starting the backend. This is useful in the situation where we need to be sure that something is started before running, e.g. in a container.
author Goffi <goffi@goffi.org>
date Wed, 13 Dec 2023 22:00:25 +0100
parents a8a0fa678ce2
children 0d7bb4df2343
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20
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21 import dataclasses
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22 from functools import partial
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23 from pathlib import Path
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24 from twisted.spread import jelly, pb
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25 from twisted.internet import reactor
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26 from libervia.backend.core.log import getLogger
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27 from libervia.backend.tools import config
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28
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29 log = getLogger(__name__)
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30
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31
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32 ## jelly hack
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33 # we monkey patch jelly to handle namedtuple
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34 ori_jelly = jelly._Jellier.jelly
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36
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37 def fixed_jelly(self, obj):
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38 """this method fix handling of namedtuple"""
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39 if isinstance(obj, tuple) and not obj is tuple:
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40 obj = tuple(obj)
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41 return ori_jelly(self, obj)
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44 jelly._Jellier.jelly = fixed_jelly
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46
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47 @dataclasses.dataclass(eq=False)
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48 class HandlerWrapper:
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49 # we use a wrapper to keep signals handlers because RemoteReference doesn't support
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50 # comparison (other than equality), making it unusable with a list
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51 handler: pb.RemoteReference
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52
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53
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54 class PBRoot(pb.Root):
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55 def __init__(self):
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56 self.signals_handlers = []
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57
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58 def remote_init_bridge(self, signals_handler):
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59 self.signals_handlers.append(HandlerWrapper(signals_handler))
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60 log.info("registered signal handler")
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61
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62 def send_signal_eb(self, failure_, signal_name):
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63 if not failure_.check(pb.PBConnectionLost):
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64 log.error(
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65 f"Error while sending signal {signal_name}: {failure_}",
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66 )
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67
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68 def send_signal(self, name, args, kwargs):
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69 to_remove = []
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70 for wrapper in self.signals_handlers:
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71 handler = wrapper.handler
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72 try:
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73 d = handler.callRemote(name, *args, **kwargs)
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74 except pb.DeadReferenceError:
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75 to_remove.append(wrapper)
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76 else:
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77 d.addErrback(self.send_signal_eb, name)
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78 if to_remove:
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79 for wrapper in to_remove:
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80 log.debug("Removing signal handler for dead frontend")
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81 self.signals_handlers.remove(wrapper)
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82
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83 def _bridge_deactivate_signals(self):
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84 if hasattr(self, "signals_paused"):
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85 log.warning("bridge signals already deactivated")
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86 if self.signals_handler:
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87 self.signals_paused.extend(self.signals_handler)
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88 else:
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89 self.signals_paused = self.signals_handlers
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90 self.signals_handlers = []
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91 log.debug("bridge signals have been deactivated")
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92
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93 def _bridge_reactivate_signals(self):
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94 try:
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95 self.signals_handlers = self.signals_paused
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96 except AttributeError:
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97 log.debug("signals were already activated")
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98 else:
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99 del self.signals_paused
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100 log.debug("bridge signals have been reactivated")
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101
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102 ##METHODS_PART##
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103
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104
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105 class bridge(object):
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106 def __init__(self):
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107 log.info("Init Perspective Broker...")
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108 self.root = PBRoot()
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109 conf = config.parse_main_conf()
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110 get_conf = partial(config.get_conf, conf, "bridge_pb", "")
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111 conn_type = get_conf("connection_type", "unix_socket")
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112 if conn_type == "unix_socket":
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113 local_dir = Path(config.config_get(conf, "", "local_dir")).resolve()
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114 socket_path = local_dir / "bridge_pb"
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115 log.info(f"using UNIX Socket at {socket_path}")
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116 reactor.listenUNIX(
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117 str(socket_path), pb.PBServerFactory(self.root), mode=0o600
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118 )
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119 elif conn_type == "socket":
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120 port = int(get_conf("port", 8789))
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121 log.info(f"using TCP Socket at port {port}")
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122 reactor.listenTCP(port, pb.PBServerFactory(self.root))
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123 else:
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124 raise ValueError(f"Unknown pb connection type: {conn_type!r}")
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125
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126 def send_signal(self, name, *args, **kwargs):
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127 self.root.send_signal(name, args, kwargs)
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128
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129 def remote_init_bridge(self, signals_handler):
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130 self.signals_handlers.append(signals_handler)
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131 log.info("registered signal handler")
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132
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133 def register_method(self, name, callback):
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134 log.debug("registering PB bridge method [%s]" % name)
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135 setattr(self.root, "remote_" + name, callback)
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136 #  self.root.register_method(name, callback)
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137
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138 def add_method(
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139 self, name, int_suffix, in_sign, out_sign, method, async_=False, doc={}
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140 ):
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141 """Dynamically add a method to PB bridge"""
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142 # FIXME: doc parameter is kept only temporary, the time to remove it from calls
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143 log.debug("Adding method {name} to PB bridge".format(name=name))
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144 self.register_method(name, method)
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145
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146 def add_signal(self, name, int_suffix, signature, doc={}):
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147 log.debug("Adding signal {name} to PB bridge".format(name=name))
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148 setattr(
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149 self, name, lambda *args, **kwargs: self.send_signal(name, *args, **kwargs)
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150 )
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151
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152 def bridge_deactivate_signals(self):
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153 """Stop sending signals to bridge
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154
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155 Mainly used for mobile frontends, when the frontend is paused
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156 """
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157 self.root._bridge_deactivate_signals()
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158
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159 def bridge_reactivate_signals(self):
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160 """Send again signals to bridge
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161
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162 Should only be used after bridge_deactivate_signals has been called
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163 """
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164 self.root._bridge_reactivate_signals()
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165
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166 def _debug(self, action, params, profile):
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167 self.send_signal("_debug", action, params, profile)
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168
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169 def action_new(self, action_data, id, security_limit, profile):
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170 self.send_signal("action_new", action_data, id, security_limit, profile)
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171
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172 def connected(self, jid_s, profile):
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173 self.send_signal("connected", jid_s, profile)
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174
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175 def contact_deleted(self, entity_jid, profile):
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176 self.send_signal("contact_deleted", entity_jid, profile)
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177
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178 def contact_new(self, contact_jid, attributes, groups, profile):
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179 self.send_signal("contact_new", contact_jid, attributes, groups, profile)
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180
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181 def disconnected(self, profile):
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182 self.send_signal("disconnected", profile)
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183
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184 def entity_data_updated(self, jid, name, value, profile):
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185 self.send_signal("entity_data_updated", jid, name, value, profile)
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186
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187 def message_encryption_started(self, to_jid, encryption_data, profile_key):
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188 self.send_signal("message_encryption_started", to_jid, encryption_data, profile_key)
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189
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190 def message_encryption_stopped(self, to_jid, encryption_data, profile_key):
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191 self.send_signal("message_encryption_stopped", to_jid, encryption_data, profile_key)
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192
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193 def message_new(self, uid, timestamp, from_jid, to_jid, message, subject, mess_type, extra, profile):
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194 self.send_signal("message_new", uid, timestamp, from_jid, to_jid, message, subject, mess_type, extra, profile)
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195
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196 def message_update(self, uid, message_type, message_data, profile):
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197 self.send_signal("message_update", uid, message_type, message_data, profile)
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198
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199 def notification_deleted(self, id, profile):
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200 self.send_signal("notification_deleted", id, profile)
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201
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202 def notification_new(self, id, timestamp, type, body_plain, body_rich, title, requires_action, priority, expire_at, extra, profile):
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203 self.send_signal("notification_new", id, timestamp, type, body_plain, body_rich, title, requires_action, priority, expire_at, extra, profile)
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204
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205 def param_update(self, name, value, category, profile):
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206 self.send_signal("param_update", name, value, category, profile)
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207
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208 def presence_update(self, entity_jid, show, priority, statuses, profile):
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209 self.send_signal("presence_update", entity_jid, show, priority, statuses, profile)
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210
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211 def progress_error(self, id, error, profile):
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212 self.send_signal("progress_error", id, error, profile)
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213
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214 def progress_finished(self, id, metadata, profile):
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215 self.send_signal("progress_finished", id, metadata, profile)
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216
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217 def progress_started(self, id, metadata, profile):
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218 self.send_signal("progress_started", id, metadata, profile)
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219
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220 def subscribe(self, sub_type, entity_jid, profile):
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221 self.send_signal("subscribe", sub_type, entity_jid, profile)