Mercurial > libervia-backend

annotate src/bridge/bridge_constructor/constructors/pb/pb_frontend_template.py @ 2138:6e509ee853a8

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plugin OTR, core; use of new sendMessage + OTR mini refactoring: - new client.sendMessage method is used instead of sendMessageToStream - client.feedback is used in OTR - OTR now add message processing hints and carbon private element as recommanded by XEP-0364. Explicit Message Encryption is still TODO - OTR use the new sendMessageFinish trigger, this has a number of advantages: * there is little risk that OTR is skipped by other plugins (they have to use client.sendMessage as recommanded) * being at the end of the chain, OTR can check and remove any HTML or other leaking elements * OTR doesn't have to skip other plugins anymore, this means that things like delivery receipts are now working with OTR (but because there is not full stanza encryption, they can leak metadata) * OTR can decide to follow storage hint by letting or deleting "history" key
author Goffi <goffi@goffi.org>
date Sun, 05 Feb 2017 15:00:01 +0100
parents 5e79ba00c1e2
children 8b37a62336c3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2092
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1 #!/usr/bin/env python2
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2 #-*- coding: utf-8 -*-
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3
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4 # SAT communication bridge
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5 # Copyright (C) 2009-2016 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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19
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20 from sat.core.log import getLogger
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21 log = getLogger(__name__)
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22 from sat.core import exceptions
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23 from twisted.spread import pb
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24 from twisted.internet import reactor
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25
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26
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27 class SignalsHandler(pb.Referenceable):
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28
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29 def __getattr__(self, name):
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30 if name.startswith("remote_"):
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31 log.debug(u"calling an unregistered signal: {name}".format(
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32 name = name[7:]))
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33 return lambda *args, **kwargs: None
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34
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35 else:
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36 raise AttributeError(name)
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37
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38 def register_signal(self, name, handler, iface="core"):
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39 log.debug("registering signal {name}".format(name=name))
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40 method_name = "remote_" + name
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41 try:
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42 self.__getattribute__(self, method_name)
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43 except AttributeError:
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44 pass
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45 else:
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46 raise exceptions.InternalError(u"{name} signal handler has been registered twice".format(
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47 name = method_name))
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48 setattr(self, method_name, handler)
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49
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50
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51 class Bridge(object):
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52
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53 def __init__(self):
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54 self.signals_handler = SignalsHandler()
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55
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56 def __getattr__(self, name):
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57 return lambda *args, **kwargs: self.call(name, args, kwargs)
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58
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59 def remoteCallback(self, result, callback):
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60 """call callback with argument or None
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61
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62 if result is not None not argument is used,
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63 else result is used as argument
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64 @param result: remote call result
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65 @param callback(callable): method to call on result
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66 """
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67 if result is None:
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68 callback()
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69 else:
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70 callback(result)
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71
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72 def call(self, name, args, kwargs):
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73 """call a remote method
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74
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75 @param name(str): name of the bridge method
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76 @param args(list): arguments
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77 may contain callback and errback as last 2 items
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78 @param kwargs(dict): keyword arguments
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79 may contain callback and errback
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80 """
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81 callback = errback = None
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82 if kwargs:
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83 try:
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84 callback = kwargs.pop('callback')
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85 except KeyError:
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86 pass
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87 try:
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88 errback = kwargs.pop('errback')
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89 except KeyError:
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90 pass
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91 elif len(args) >= 2 and callable(args[-1]) and callable(args[-2]):
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92 errback = args.pop()
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93 callback = args.pop()
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94 d = self.root.callRemote(name, *args, **kwargs)
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95 if callback is not None:
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96 d.addCallback(self.remoteCallback, callback)
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97 if errback is not None:
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98 d.addErrback(errback)
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99
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100 def _initBridgeEb(self, failure):
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101 log.error(u"Can't init bridge: {msg}".format(msg=failure))
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102
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103 def _set_root(self, root):
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104 """set remote root object
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105
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106 bridge will then be initialised
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107 """
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108 self.root = root
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109 d = root.callRemote("initBridge", self.signals_handler)
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110 d.addErrback(self._initBridgeEb)
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111 return d
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112
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113 def _generic_errback(self, failure):
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114 log.error(u"bridge failure: {}".format(failure))
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115
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116 def bridgeConnect(self, callback, errback):
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117 factory = pb.PBClientFactory()
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118 reactor.connectTCP("localhost", 8789, factory)
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119 d = factory.getRootObject()
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120 d.addCallback(self._set_root)
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121 d.addCallback(lambda dummy: callback())
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122 d.addErrback(errback)
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123
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124 def register_signal(self, functionName, handler, iface="core"):
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125 self.signals_handler.register_signal(functionName, handler, iface)
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126
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127 ##METHODS_PART##