Mercurial > libervia-backend

annotate src/bridge/bridge_constructor/constructors/dbus/dbus_frontend_template.py @ 2243:5e12fc5ae52a

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plugin events: separation of event node and invitees node - event node is handling the main metadata of the event, and invitees node handle the invitations/invitees answers - invitees and blog node are automatically created and associated to the event, except if they are specified (in which cas the existing one are used and attached to the event node) - extra metadata are added to <meta> elements
author Goffi <goffi@goffi.org>
date Fri, 19 May 2017 12:43:41 +0200
parents 255830fdb80b
children 8b37a62336c3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1934
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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.i18n import _
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21 from bridge_frontend import BridgeException
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22 import dbus
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23 from sat.core.log import getLogger
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24 log = getLogger(__name__)
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25 from sat.core.exceptions import BridgeExceptionNoService, BridgeInitError
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26
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27 from dbus.mainloop.glib import DBusGMainLoop
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28 DBusGMainLoop(set_as_default=True)
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29
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30 import ast
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31
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32 const_INT_PREFIX = "org.goffi.SAT" # Interface prefix
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33 const_ERROR_PREFIX = const_INT_PREFIX + ".error"
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34 const_OBJ_PATH = '/org/goffi/SAT/bridge'
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35 const_CORE_SUFFIX = ".core"
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36 const_PLUGIN_SUFFIX = ".plugin"
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37 const_TIMEOUT = 120
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39
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40 def dbus_to_bridge_exception(dbus_e):
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41 """Convert a DBusException to a BridgeException.
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42
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43 @param dbus_e (DBusException)
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44 @return: BridgeException
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45 """
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46 full_name = dbus_e.get_dbus_name()
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47 if full_name.startswith(const_ERROR_PREFIX):
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48 name = dbus_e.get_dbus_name()[len(const_ERROR_PREFIX) + 1:]
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49 else:
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50 name = full_name
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51 # XXX: dbus_e.args doesn't contain the original DBusException args, but we
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52 # receive its serialized form in dbus_e.args[0]. From that we can rebuild
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53 # the original arguments list thanks to ast.literal_eval (secure eval).
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54 message = dbus_e.get_dbus_message() # similar to dbus_e.args[0]
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55 try:
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56 message, condition = ast.literal_eval(message)
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57 except (SyntaxError, ValueError, TypeError):
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58 condition = ''
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59 return BridgeException(name, message, condition)
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61
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62 class Bridge(object):
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63
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64 def bridgeConnect(self, callback, errback):
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65 try:
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66 self.sessions_bus = dbus.SessionBus()
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67 self.db_object = self.sessions_bus.get_object(const_INT_PREFIX,
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68 const_OBJ_PATH)
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69 self.db_core_iface = dbus.Interface(self.db_object,
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70 dbus_interface=const_INT_PREFIX + const_CORE_SUFFIX)
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71 self.db_plugin_iface = dbus.Interface(self.db_object,
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72 dbus_interface=const_INT_PREFIX + const_PLUGIN_SUFFIX)
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73 except dbus.exceptions.DBusException, e:
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74 if e._dbus_error_name in ('org.freedesktop.DBus.Error.ServiceUnknown',
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75 'org.freedesktop.DBus.Error.Spawn.ExecFailed'):
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76 errback(BridgeExceptionNoService())
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77 elif e._dbus_error_name == 'org.freedesktop.DBus.Error.NotSupported':
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78 log.error(_(u"D-Bus is not launched, please see README to see instructions on how to launch it"))
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79 errback(BridgeInitError)
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80 else:
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81 errback(e)
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82 callback()
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83 #props = self.db_core_iface.getProperties()
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84
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85 def register_signal(self, functionName, handler, iface="core"):
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86 if iface == "core":
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87 self.db_core_iface.connect_to_signal(functionName, handler)
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88 elif iface == "plugin":
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89 self.db_plugin_iface.connect_to_signal(functionName, handler)
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90 else:
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91 log.error(_('Unknown interface'))
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92
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93 def __getattribute__(self, name):
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94 """ usual __getattribute__ if the method exists, else try to find a plugin method """
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95 try:
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96 return object.__getattribute__(self, name)
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97 except AttributeError:
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98 # The attribute is not found, we try the plugin proxy to find the requested method
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99
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100 def getPluginMethod(*args, **kwargs):
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101 # We first check if we have an async call. We detect this in two ways:
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102 # - if we have the 'callback' and 'errback' keyword arguments
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103 # - or if the last two arguments are callable
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104
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105 async = False
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106 args = list(args)
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107
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108 if kwargs:
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109 if 'callback' in kwargs:
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110 async = True
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111 _callback = kwargs.pop('callback')
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112 _errback = kwargs.pop('errback', lambda failure: log.error(unicode(failure)))
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113 try:
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114 args.append(kwargs.pop('profile'))
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115 except KeyError:
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116 try:
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117 args.append(kwargs.pop('profile_key'))
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118 except KeyError:
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119 pass
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120 # at this point, kwargs should be empty
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121 if kwargs:
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122 log.warnings(u"unexpected keyword arguments, they will be ignored: {}".format(kwargs))
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123 elif len(args) >= 2 and callable(args[-1]) and callable(args[-2]):
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124 async = True
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125 _errback = args.pop()
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parents: 562
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126 _callback = args.pop()
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
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127
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239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
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128 method = getattr(self.db_plugin_iface, name)
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
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129
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239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
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130 if async:
1072
d123d61976c8 bridge (D-Bus): frontend side now use a 120 s timeout for async calls
Goffi <goffi@goffi.org>
parents: 1062
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131 kwargs['timeout'] = const_TIMEOUT
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239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
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132 kwargs['reply_handler'] = _callback
1062
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
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133 kwargs['error_handler'] = lambda err: _errback(dbus_to_bridge_exception(err))
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239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
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134
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
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135 return method(*args, **kwargs)
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
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136
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Goffi <goffi@goffi.org>
parents: 562
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137 return getPluginMethod
1290
faa1129559b8 core, frontends: refactoring to base Libervia on QuickFrontend (big mixed commit):
Goffi <goffi@goffi.org>
parents: 1188
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138
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f02e2c277f0c bridge: fixed bridge_constructor
Goffi <goffi@goffi.org>
parents: 709
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139 ##METHODS_PART##