290 lines
10 KiB
Python
290 lines
10 KiB
Python
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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# SAT plugin for adding D-Bus to Ad-Hoc Commands
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# Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from sat.core.i18n import _
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from sat.core.constants import Const as C
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from sat.core.log import getLogger
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log = getLogger(__name__)
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from sat.core import exceptions
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from twisted.internet import defer
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from wokkel import data_form
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try:
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from lxml import etree
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except ImportError:
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raise exceptions.MissingModule(
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u"Missing module lxml, please download/install it from http://lxml.de/"
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)
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import os.path
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import uuid
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import dbus
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from dbus.mainloop.glib import DBusGMainLoop
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DBusGMainLoop(set_as_default=True)
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FD_NAME = "org.freedesktop.DBus"
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FD_PATH = "/org/freedekstop/DBus"
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INTROSPECT_IFACE = "org.freedesktop.DBus.Introspectable"
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INTROSPECT_METHOD = "Introspect"
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IGNORED_IFACES_START = (
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"org.freedesktop",
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"org.qtproject",
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"org.kde.KMainWindow",
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) # commands in interface starting with these values will be ignored
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FLAG_LOOP = "LOOP"
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PLUGIN_INFO = {
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C.PI_NAME: "Ad-Hoc Commands - D-Bus",
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C.PI_IMPORT_NAME: "AD_HOC_DBUS",
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C.PI_TYPE: "Misc",
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C.PI_PROTOCOLS: [],
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C.PI_DEPENDENCIES: ["XEP-0050"],
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C.PI_MAIN: "AdHocDBus",
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C.PI_HANDLER: "no",
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C.PI_DESCRIPTION: _("""Add D-Bus management to Ad-Hoc commands"""),
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}
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class AdHocDBus(object):
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def __init__(self, host):
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log.info(_("plugin Ad-Hoc D-Bus initialization"))
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self.host = host
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host.bridge.addMethod(
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"adHocDBusAddAuto",
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".plugin",
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in_sign="sasasasasasass",
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out_sign="(sa(sss))",
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method=self._adHocDBusAddAuto,
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async=True,
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)
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self.session_bus = dbus.SessionBus()
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self.fd_object = self.session_bus.get_object(FD_NAME, FD_PATH, introspect=False)
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self.XEP_0050 = host.plugins["XEP-0050"]
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def _DBusAsyncCall(self, proxy, method, *args, **kwargs):
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""" Call a DBus method asynchronously and return a deferred
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@param proxy: DBus object proxy, as returner by get_object
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@param method: name of the method to call
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@param args: will be transmitted to the method
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@param kwargs: will be transmetted to the method, except for the following poped values:
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- interface: name of the interface to use
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@return: a deferred
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"""
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d = defer.Deferred()
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interface = kwargs.pop("interface", None)
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kwargs["reply_handler"] = lambda ret=None: d.callback(ret)
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kwargs["error_handler"] = d.errback
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proxy.get_dbus_method(method, dbus_interface=interface)(*args, **kwargs)
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return d
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def _DBusListNames(self):
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return self._DBusAsyncCall(self.fd_object, "ListNames")
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def _DBusIntrospect(self, proxy):
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return self._DBusAsyncCall(proxy, INTROSPECT_METHOD, interface=INTROSPECT_IFACE)
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def _acceptMethod(self, method):
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""" Return True if we accept the method for a command
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@param method: etree.Element
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@return: True if the method is acceptable
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"""
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if method.xpath(
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"arg[@direction='in']"
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): # we don't accept method with argument for the moment
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return False
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return True
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@defer.inlineCallbacks
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def _introspect(self, methods, bus_name, proxy):
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log.debug("introspecting path [%s]" % proxy.object_path)
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introspect_xml = yield self._DBusIntrospect(proxy)
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el = etree.fromstring(introspect_xml)
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for node in el.iterchildren("node", "interface"):
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if node.tag == "node":
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new_path = os.path.join(proxy.object_path, node.get("name"))
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new_proxy = self.session_bus.get_object(
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bus_name, new_path, introspect=False
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)
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yield self._introspect(methods, bus_name, new_proxy)
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elif node.tag == "interface":
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name = node.get("name")
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if any(name.startswith(ignored) for ignored in IGNORED_IFACES_START):
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log.debug("interface [%s] is ignored" % name)
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continue
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log.debug("introspecting interface [%s]" % name)
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for method in node.iterchildren("method"):
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if self._acceptMethod(method):
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method_name = method.get("name")
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log.debug("method accepted: [%s]" % method_name)
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methods.add((proxy.object_path, name, method_name))
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def _adHocDBusAddAuto(
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self,
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prog_name,
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allowed_jids,
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allowed_groups,
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allowed_magics,
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forbidden_jids,
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forbidden_groups,
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flags,
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profile_key,
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):
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return self.adHocDBusAddAuto(
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prog_name,
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allowed_jids,
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allowed_groups,
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allowed_magics,
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forbidden_jids,
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forbidden_groups,
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flags,
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profile_key,
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)
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@defer.inlineCallbacks
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def adHocDBusAddAuto(
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self,
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prog_name,
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allowed_jids=None,
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allowed_groups=None,
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allowed_magics=None,
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forbidden_jids=None,
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forbidden_groups=None,
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flags=None,
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profile_key=C.PROF_KEY_NONE,
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):
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bus_names = yield self._DBusListNames()
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bus_names = [bus_name for bus_name in bus_names if "." + prog_name in bus_name]
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if not bus_names:
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log.info("Can't find any bus for [%s]" % prog_name)
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defer.returnValue(("", []))
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bus_names.sort()
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for bus_name in bus_names:
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if bus_name.endswith(prog_name):
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break
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log.info("bus name found: [%s]" % bus_name)
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proxy = self.session_bus.get_object(bus_name, "/", introspect=False)
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methods = set()
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yield self._introspect(methods, bus_name, proxy)
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if methods:
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self._addCommand(
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prog_name,
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bus_name,
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methods,
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allowed_jids=allowed_jids,
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allowed_groups=allowed_groups,
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allowed_magics=allowed_magics,
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forbidden_jids=forbidden_jids,
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forbidden_groups=forbidden_groups,
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flags=flags,
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profile_key=profile_key,
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)
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defer.returnValue((bus_name, methods))
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def _addCommand(
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self,
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adhoc_name,
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bus_name,
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methods,
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allowed_jids=None,
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allowed_groups=None,
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allowed_magics=None,
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forbidden_jids=None,
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forbidden_groups=None,
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flags=None,
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profile_key=C.PROF_KEY_NONE,
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):
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if flags is None:
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flags = set()
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def DBusCallback(command_elt, session_data, action, node, profile):
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actions = session_data.setdefault("actions", [])
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names_map = session_data.setdefault("names_map", {})
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actions.append(action)
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if len(actions) == 1:
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# it's our first request, we ask the desired new status
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status = self.XEP_0050.STATUS.EXECUTING
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form = data_form.Form("form", title=_("Command selection"))
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options = []
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for path, iface, command in methods:
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label = command.rsplit(".", 1)[-1]
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name = str(uuid.uuid4())
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names_map[name] = (path, iface, command)
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options.append(data_form.Option(name, label))
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field = data_form.Field(
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"list-single", "command", options=options, required=True
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)
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form.addField(field)
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payload = form.toElement()
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note = None
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elif len(actions) == 2:
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# we should have the answer here
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try:
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x_elt = command_elt.elements(data_form.NS_X_DATA, "x").next()
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answer_form = data_form.Form.fromElement(x_elt)
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command = answer_form["command"]
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except (KeyError, StopIteration):
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raise self.XEP_0050.AdHocError(self.XEP_0050.ERROR.BAD_PAYLOAD)
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if command not in names_map:
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raise self.XEP_0050.AdHocError(self.XEP_0050.ERROR.BAD_PAYLOAD)
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path, iface, command = names_map[command]
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proxy = self.session_bus.get_object(bus_name, path)
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self._DBusAsyncCall(proxy, command, interface=iface)
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# job done, we can end the session, except if we have FLAG_LOOP
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if FLAG_LOOP in flags:
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# We have a loop, so we clear everything and we execute again the command as we had a first call (command_elt is not used, so None is OK)
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del actions[:]
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names_map.clear()
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return DBusCallback(
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None, session_data, self.XEP_0050.ACTION.EXECUTE, node, profile
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)
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form = data_form.Form("form", title=_(u"Updated"))
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form.addField(data_form.Field("fixed", u"Command sent"))
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status = self.XEP_0050.STATUS.COMPLETED
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payload = None
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note = (self.XEP_0050.NOTE.INFO, _(u"Command sent"))
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else:
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raise self.XEP_0050.AdHocError(self.XEP_0050.ERROR.INTERNAL)
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return (payload, status, None, note)
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self.XEP_0050.addAdHocCommand(
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DBusCallback,
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adhoc_name,
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allowed_jids=allowed_jids,
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allowed_groups=allowed_groups,
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allowed_magics=allowed_magics,
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forbidden_jids=forbidden_jids,
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forbidden_groups=forbidden_groups,
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profile_key=profile_key,
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)
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