Mercurial > libervia-backend
view sat/bridge/bridge_constructor/constructors/dbus/dbus_frontend_template.py @ 2659:c26492bd2144
plugin OTR: use new "directed" attribute when registering + use new markAsEncrypted
author | Goffi <goffi@goffi.org> |
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date | Sat, 11 Aug 2018 18:24:55 +0200 |
parents | 779351da2c13 |
children | 003b8b4b56a7 |
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#!/usr/bin/env python2 #-*- coding: utf-8 -*- # SAT communication bridge # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. from sat.core.i18n import _ from bridge_frontend import BridgeException import dbus from sat.core.log import getLogger log = getLogger(__name__) from sat.core.exceptions import BridgeExceptionNoService, BridgeInitError from dbus.mainloop.glib import DBusGMainLoop DBusGMainLoop(set_as_default=True) import ast const_INT_PREFIX = "org.salutatoi.SAT" # Interface prefix const_ERROR_PREFIX = const_INT_PREFIX + ".error" const_OBJ_PATH = '/org/salutatoi/SAT/bridge' const_CORE_SUFFIX = ".core" const_PLUGIN_SUFFIX = ".plugin" const_TIMEOUT = 120 def dbus_to_bridge_exception(dbus_e): """Convert a DBusException to a BridgeException. @param dbus_e (DBusException) @return: BridgeException """ full_name = dbus_e.get_dbus_name() if full_name.startswith(const_ERROR_PREFIX): name = dbus_e.get_dbus_name()[len(const_ERROR_PREFIX) + 1:] else: name = full_name # XXX: dbus_e.args doesn't contain the original DBusException args, but we # receive its serialized form in dbus_e.args[0]. From that we can rebuild # the original arguments list thanks to ast.literal_eval (secure eval). message = dbus_e.get_dbus_message() # similar to dbus_e.args[0] try: message, condition = ast.literal_eval(message) except (SyntaxError, ValueError, TypeError): condition = '' return BridgeException(name, message, condition) class Bridge(object): def bridgeConnect(self, callback, errback): try: self.sessions_bus = dbus.SessionBus() self.db_object = self.sessions_bus.get_object(const_INT_PREFIX, const_OBJ_PATH) self.db_core_iface = dbus.Interface(self.db_object, dbus_interface=const_INT_PREFIX + const_CORE_SUFFIX) self.db_plugin_iface = dbus.Interface(self.db_object, dbus_interface=const_INT_PREFIX + const_PLUGIN_SUFFIX) except dbus.exceptions.DBusException, e: if e._dbus_error_name in ('org.freedesktop.DBus.Error.ServiceUnknown', 'org.freedesktop.DBus.Error.Spawn.ExecFailed'): errback(BridgeExceptionNoService()) elif e._dbus_error_name == 'org.freedesktop.DBus.Error.NotSupported': log.error(_(u"D-Bus is not launched, please see README to see instructions on how to launch it")) errback(BridgeInitError) else: errback(e) callback() #props = self.db_core_iface.getProperties() def register_signal(self, functionName, handler, iface="core"): if iface == "core": self.db_core_iface.connect_to_signal(functionName, handler) elif iface == "plugin": self.db_plugin_iface.connect_to_signal(functionName, handler) else: log.error(_('Unknown interface')) def __getattribute__(self, name): """ usual __getattribute__ if the method exists, else try to find a plugin method """ try: return object.__getattribute__(self, name) except AttributeError: # The attribute is not found, we try the plugin proxy to find the requested method def getPluginMethod(*args, **kwargs): # We first check if we have an async call. We detect this in two ways: # - if we have the 'callback' and 'errback' keyword arguments # - or if the last two arguments are callable async = False args = list(args) if kwargs: if 'callback' in kwargs: async = True _callback = kwargs.pop('callback') _errback = kwargs.pop('errback', lambda failure: log.error(unicode(failure))) try: args.append(kwargs.pop('profile')) except KeyError: try: args.append(kwargs.pop('profile_key')) except KeyError: pass # at this point, kwargs should be empty if kwargs: log.warnings(u"unexpected keyword arguments, they will be ignored: {}".format(kwargs)) elif len(args) >= 2 and callable(args[-1]) and callable(args[-2]): async = True _errback = args.pop() _callback = args.pop() method = getattr(self.db_plugin_iface, name) if async: kwargs['timeout'] = const_TIMEOUT kwargs['reply_handler'] = _callback kwargs['error_handler'] = lambda err: _errback(dbus_to_bridge_exception(err)) return method(*args, **kwargs) return getPluginMethod ##METHODS_PART##