Mercurial > libervia-backend
annotate src/bridge/bridge_constructor/constructors/dbus/dbus_frontend_template.py @ 2153:f67434fd88d2
tools (common/data_format): added dict2iterdict to yield dictionary from serialised complex values
author | Goffi <goffi@goffi.org> |
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date | Thu, 16 Feb 2017 00:40:50 +0100 |
parents | f413bfc24458 |
children | 255830fdb80b |
rev | line source |
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1934
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1 #!/usr/bin/env python2 |
267 | 2 #-*- coding: utf-8 -*- |
3 | |
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4 # SAT communication bridge |
1766 | 5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org) |
267 | 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. |
267 | 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. |
267 | 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/>. |
267 | 19 |
771 | 20 from sat.core.i18n import _ |
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21 from bridge_frontend import BridgeFrontend, 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 |
267 | 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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38 |
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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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60 |
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61 |
2086 | 62 class Bridge(BridgeFrontend): |
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63 |
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64 def bridgeConnect(self, callback, errback): |
267 | 65 try: |
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) |
267 | 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() |
267 | 84 |
2086 | 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')) |
267 | 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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bridge (D-Bus): fixed handling of profile in kwargs:
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parents:
1766
diff
changeset
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121 if kwargs: |
b0ed4863dbc7
bridge (D-Bus): fixed handling of profile in kwargs:
Goffi <goffi@goffi.org>
parents:
1766
diff
changeset
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122 log.warnings(u"unexpected keyword arguments, they will be ignored: {}".format(kwargs)) |
595
1f160467f5de
Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
587
diff
changeset
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123 elif len(args) >= 2 and callable(args[-1]) and callable(args[-2]): |
568
239abc5484c9
bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents:
562
diff
changeset
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124 async = True |
239abc5484c9
bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents:
562
diff
changeset
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125 _errback = args.pop() |
239abc5484c9
bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents:
562
diff
changeset
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126 _callback = args.pop() |
587
952322b1d490
Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
572
diff
changeset
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127 |
568
239abc5484c9
bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents:
562
diff
changeset
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128 method = getattr(self.db_plugin_iface, name) |
587
952322b1d490
Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
572
diff
changeset
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129 |
568
239abc5484c9
bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents:
562
diff
changeset
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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
diff
changeset
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131 kwargs['timeout'] = const_TIMEOUT |
568
239abc5484c9
bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents:
562
diff
changeset
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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
diff
changeset
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133 kwargs['error_handler'] = lambda err: _errback(dbus_to_bridge_exception(err)) |
568
239abc5484c9
bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents:
562
diff
changeset
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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
diff
changeset
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135 return method(*args, **kwargs) |
587
952322b1d490
Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
572
diff
changeset
|
136 |
568
239abc5484c9
bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents:
562
diff
changeset
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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
diff
changeset
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138 |
723 | 139 ##METHODS_PART## |