Mercurial > libervia-backend
view sat/plugins/plugin_adhoc_dbus.py @ 3187:d92a144f3589
plugin download: use cache if dest_path is empty:
if dest_path is not set, the file will be downloaded in cache. A new name will be
generated using a hash of the uri. If the file is already downloded in cache, it won't be
downloaded again (in this case returned progress_id is an empty string).
author | Goffi <goffi@goffi.org> |
---|---|
date | Wed, 26 Feb 2020 22:03:11 +0100 |
parents | 46a6251713d3 |
children | be6d91572633 |
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#!/usr/bin/env python3 # SAT plugin for adding D-Bus to Ad-Hoc Commands # Copyright (C) 2009-2020 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 D_, _ from sat.core.constants import Const as C from sat.core.log import getLogger log = getLogger(__name__) from twisted.internet import defer from twisted.words.protocols.jabber import jid from wokkel import data_form try: from lxml import etree except ImportError: etree = None log.warning("Missing module lxml, please download/install it from http://lxml.de/ ." "Auto D-Bus discovery will be disabled") from collections import OrderedDict import os.path import uuid try: import dbus from dbus.mainloop.glib import DBusGMainLoop except ImportError: dbus = None log.warning("Missing module dbus, please download/install it, " "auto D-Bus discovery will be disabled") else: DBusGMainLoop(set_as_default=True) NS_MEDIA_PLAYER = "org.salutatoi.mediaplayer" FD_NAME = "org.freedesktop.DBus" FD_PATH = "/org/freedekstop/DBus" INTROSPECT_IFACE = "org.freedesktop.DBus.Introspectable" MPRIS_PREFIX = "org.mpris.MediaPlayer2" CMD_GO_BACK = "GoBack" CMD_GO_FWD = "GoFW" SEEK_OFFSET = 5 * 1000 * 1000 MPRIS_COMMANDS = ["org.mpris.MediaPlayer2.Player." + cmd for cmd in ( "Previous", CMD_GO_BACK, "PlayPause", CMD_GO_FWD, "Next")] MPRIS_PATH = "/org/mpris/MediaPlayer2" MPRIS_PROPERTIES = OrderedDict(( ("org.mpris.MediaPlayer2", ( "Identity", )), ("org.mpris.MediaPlayer2.Player", ( "Metadata", "PlaybackStatus", "Volume", )), )) MPRIS_METADATA_KEY = "Metadata" MPRIS_METADATA_MAP = OrderedDict(( ("xesam:title", "Title"), )) INTROSPECT_METHOD = "Introspect" IGNORED_IFACES_START = ( "org.freedesktop", "org.qtproject", "org.kde.KMainWindow", ) # commands in interface starting with these values will be ignored FLAG_LOOP = "LOOP" PLUGIN_INFO = { C.PI_NAME: "Ad-Hoc Commands - D-Bus", C.PI_IMPORT_NAME: "AD_HOC_DBUS", C.PI_TYPE: "Misc", C.PI_PROTOCOLS: [], C.PI_DEPENDENCIES: ["XEP-0050"], C.PI_MAIN: "AdHocDBus", C.PI_HANDLER: "no", C.PI_DESCRIPTION: _("""Add D-Bus management to Ad-Hoc commands"""), } class AdHocDBus(object): def __init__(self, host): log.info(_("plugin Ad-Hoc D-Bus initialization")) self.host = host if etree is not None: host.bridge.addMethod( "adHocDBusAddAuto", ".plugin", in_sign="sasasasasasass", out_sign="(sa(sss))", method=self._adHocDBusAddAuto, async_=True, ) host.bridge.addMethod( "adHocRemotesGet", ".plugin", in_sign="s", out_sign="a(sss)", method=self._adHocRemotesGet, async_=True, ) self._c = host.plugins["XEP-0050"] host.registerNamespace("mediaplayer", NS_MEDIA_PLAYER) if dbus is not None: self.session_bus = dbus.SessionBus() self.fd_object = self.session_bus.get_object( FD_NAME, FD_PATH, introspect=False) def profileConnected(self, client): if dbus is not None: self._c.addAdHocCommand( client, self.localMediaCb, D_("Media Players"), node=NS_MEDIA_PLAYER, timeout=60*60*6 # 6 hours timeout, to avoid breaking remote # in the middle of a movie ) def _DBusAsyncCall(self, proxy, method, *args, **kwargs): """ Call a DBus method asynchronously and return a deferred @param proxy: DBus object proxy, as returner by get_object @param method: name of the method to call @param args: will be transmitted to the method @param kwargs: will be transmetted to the method, except for the following poped values: - interface: name of the interface to use @return: a deferred """ d = defer.Deferred() interface = kwargs.pop("interface", None) kwargs["reply_handler"] = lambda ret=None: d.callback(ret) kwargs["error_handler"] = d.errback proxy.get_dbus_method(method, dbus_interface=interface)(*args, **kwargs) return d def _DBusGetProperty(self, proxy, interface, name): return self._DBusAsyncCall( proxy, "Get", interface, name, interface="org.freedesktop.DBus.Properties") def _DBusListNames(self): return self._DBusAsyncCall(self.fd_object, "ListNames") def _DBusIntrospect(self, proxy): return self._DBusAsyncCall(proxy, INTROSPECT_METHOD, interface=INTROSPECT_IFACE) def _acceptMethod(self, method): """ Return True if we accept the method for a command @param method: etree.Element @return: True if the method is acceptable """ if method.xpath( "arg[@direction='in']" ): # we don't accept method with argument for the moment return False return True @defer.inlineCallbacks def _introspect(self, methods, bus_name, proxy): log.debug("introspecting path [%s]" % proxy.object_path) introspect_xml = yield self._DBusIntrospect(proxy) el = etree.fromstring(introspect_xml) for node in el.iterchildren("node", "interface"): if node.tag == "node": new_path = os.path.join(proxy.object_path, node.get("name")) new_proxy = self.session_bus.get_object( bus_name, new_path, introspect=False ) yield self._introspect(methods, bus_name, new_proxy) elif node.tag == "interface": name = node.get("name") if any(name.startswith(ignored) for ignored in IGNORED_IFACES_START): log.debug("interface [%s] is ignored" % name) continue log.debug("introspecting interface [%s]" % name) for method in node.iterchildren("method"): if self._acceptMethod(method): method_name = method.get("name") log.debug("method accepted: [%s]" % method_name) methods.add((proxy.object_path, name, method_name)) def _adHocDBusAddAuto(self, prog_name, allowed_jids, allowed_groups, allowed_magics, forbidden_jids, forbidden_groups, flags, profile_key): client = self.host.getClient(profile_key) return self.adHocDBusAddAuto( client, prog_name, allowed_jids, allowed_groups, allowed_magics, forbidden_jids, forbidden_groups, flags) @defer.inlineCallbacks def adHocDBusAddAuto(self, client, prog_name, allowed_jids=None, allowed_groups=None, allowed_magics=None, forbidden_jids=None, forbidden_groups=None, flags=None): bus_names = yield self._DBusListNames() bus_names = [bus_name for bus_name in bus_names if "." + prog_name in bus_name] if not bus_names: log.info("Can't find any bus for [%s]" % prog_name) defer.returnValue(("", [])) bus_names.sort() for bus_name in bus_names: if bus_name.endswith(prog_name): break log.info("bus name found: [%s]" % bus_name) proxy = self.session_bus.get_object(bus_name, "/", introspect=False) methods = set() yield self._introspect(methods, bus_name, proxy) if methods: self._addCommand( client, prog_name, bus_name, methods, allowed_jids=allowed_jids, allowed_groups=allowed_groups, allowed_magics=allowed_magics, forbidden_jids=forbidden_jids, forbidden_groups=forbidden_groups, flags=flags, ) defer.returnValue((str(bus_name), methods)) def _addCommand(self, client, adhoc_name, bus_name, methods, allowed_jids=None, allowed_groups=None, allowed_magics=None, forbidden_jids=None, forbidden_groups=None, flags=None): if flags is None: flags = set() def DBusCallback(client, command_elt, session_data, action, node): actions = session_data.setdefault("actions", []) names_map = session_data.setdefault("names_map", {}) actions.append(action) if len(actions) == 1: # it's our first request, we ask the desired new status status = self._c.STATUS.EXECUTING form = data_form.Form("form", title=_("Command selection")) options = [] for path, iface, command in methods: label = command.rsplit(".", 1)[-1] name = str(uuid.uuid4()) names_map[name] = (path, iface, command) options.append(data_form.Option(name, label)) field = data_form.Field( "list-single", "command", options=options, required=True ) form.addField(field) payload = form.toElement() note = None elif len(actions) == 2: # we should have the answer here try: x_elt = next(command_elt.elements(data_form.NS_X_DATA, "x")) answer_form = data_form.Form.fromElement(x_elt) command = answer_form["command"] except (KeyError, StopIteration): raise self._c.AdHocError(self._c.ERROR.BAD_PAYLOAD) if command not in names_map: raise self._c.AdHocError(self._c.ERROR.BAD_PAYLOAD) path, iface, command = names_map[command] proxy = self.session_bus.get_object(bus_name, path) self._DBusAsyncCall(proxy, command, interface=iface) # job done, we can end the session, except if we have FLAG_LOOP if FLAG_LOOP in flags: # 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) del actions[:] names_map.clear() return DBusCallback( client, None, session_data, self._c.ACTION.EXECUTE, node ) form = data_form.Form("form", title=_("Updated")) form.addField(data_form.Field("fixed", "Command sent")) status = self._c.STATUS.COMPLETED payload = None note = (self._c.NOTE.INFO, _("Command sent")) else: raise self._c.AdHocError(self._c.ERROR.INTERNAL) return (payload, status, None, note) self._c.addAdHocCommand( client, DBusCallback, adhoc_name, allowed_jids=allowed_jids, allowed_groups=allowed_groups, allowed_magics=allowed_magics, forbidden_jids=forbidden_jids, forbidden_groups=forbidden_groups, ) ## Local media ## def _adHocRemotesGet(self, profile): return self.adHocRemotesGet(self.host.getClient(profile)) @defer.inlineCallbacks def adHocRemotesGet(self, client): """Retrieve available remote media controlers in our devices @return (list[tuple[unicode, unicode, unicode]]): list of devices with: - entity full jid - device name - device label """ found_data = yield defer.ensureDeferred(self.host.findByFeatures( client, [self.host.ns_map['commands']], service=False, roster=False, own_jid=True, local_device=True)) remotes = [] for found in found_data: for device_jid_s in found: device_jid = jid.JID(device_jid_s) cmd_list = yield self._c.list(client, device_jid) for cmd in cmd_list: if cmd.nodeIdentifier == NS_MEDIA_PLAYER: try: result_elt = yield self._c.do(client, device_jid, NS_MEDIA_PLAYER, timeout=5) command_elt = self._c.getCommandElt(result_elt) form = data_form.findForm(command_elt, NS_MEDIA_PLAYER) if form is None: continue mp_options = form.fields['media_player'].options session_id = command_elt.getAttribute('sessionid') if mp_options and session_id: # we just want to discover player, so we cancel the # session self._c.do(client, device_jid, NS_MEDIA_PLAYER, action=self._c.ACTION.CANCEL, session_id=session_id) for opt in mp_options: remotes.append((device_jid_s, opt.value, opt.label or opt.value)) except Exception as e: log.warning(_( "Can't retrieve remote controllers on {device_jid}: " "{reason}".format(device_jid=device_jid, reason=e))) break defer.returnValue(remotes) def doMPRISCommand(self, proxy, command): iface, command = command.rsplit(".", 1) if command == CMD_GO_BACK: command = 'Seek' args = [-SEEK_OFFSET] elif command == CMD_GO_FWD: command = 'Seek' args = [SEEK_OFFSET] else: args = [] return self._DBusAsyncCall(proxy, command, *args, interface=iface) def addMPRISMetadata(self, form, metadata): """Serialise MRPIS Metadata according to MPRIS_METADATA_MAP""" for mpris_key, name in MPRIS_METADATA_MAP.items(): if mpris_key in metadata: value = str(metadata[mpris_key]) form.addField(data_form.Field(fieldType="fixed", var=name, value=value)) @defer.inlineCallbacks def localMediaCb(self, client, command_elt, session_data, action, node): try: x_elt = next(command_elt.elements(data_form.NS_X_DATA, "x")) command_form = data_form.Form.fromElement(x_elt) except StopIteration: command_form = None if command_form is None or len(command_form.fields) == 0: # root request, we looks for media players bus_names = yield self._DBusListNames() bus_names = [b for b in bus_names if b.startswith(MPRIS_PREFIX)] if len(bus_names) == 0: note = (self._c.NOTE.INFO, D_("No media player found.")) defer.returnValue((None, self._c.STATUS.COMPLETED, None, note)) options = [] status = self._c.STATUS.EXECUTING form = data_form.Form("form", title=D_("Media Player Selection"), formNamespace=NS_MEDIA_PLAYER) for bus in bus_names: player_name = bus[len(MPRIS_PREFIX)+1:] if not player_name: log.warning(_("Ignoring MPRIS bus without suffix")) continue options.append(data_form.Option(bus, player_name)) field = data_form.Field( "list-single", "media_player", options=options, required=True ) form.addField(field) payload = form.toElement() defer.returnValue((payload, status, None, None)) else: # player request try: bus_name = command_form["media_player"] except KeyError: raise ValueError(_("missing media_player value")) if not bus_name.startswith(MPRIS_PREFIX): log.warning(_("Media player ad-hoc command trying to use non MPRIS bus. " "Hack attempt? Refused bus: {bus_name}").format( bus_name=bus_name)) note = (self._c.NOTE.ERROR, D_("Invalid player name.")) defer.returnValue((None, self._c.STATUS.COMPLETED, None, note)) try: proxy = self.session_bus.get_object(bus_name, MPRIS_PATH) except dbus.exceptions.DBusException as e: log.warning(_("Can't get D-Bus proxy: {reason}").format(reason=e)) note = (self._c.NOTE.ERROR, D_("Media player is not available anymore")) defer.returnValue((None, self._c.STATUS.COMPLETED, None, note)) try: command = command_form["command"] except KeyError: pass else: yield self.doMPRISCommand(proxy, command) # we construct the remote control form form = data_form.Form("form", title=D_("Media Player Selection")) form.addField(data_form.Field(fieldType="hidden", var="media_player", value=bus_name)) for iface, properties_names in MPRIS_PROPERTIES.items(): for name in properties_names: try: value = yield self._DBusGetProperty(proxy, iface, name) except Exception as e: log.warning(_("Can't retrieve attribute {name}: {reason}") .format(name=name, reason=e)) continue if name == MPRIS_METADATA_KEY: self.addMPRISMetadata(form, value) else: form.addField(data_form.Field(fieldType="fixed", var=name, value=str(value))) commands = [data_form.Option(c, c.rsplit(".", 1)[1]) for c in MPRIS_COMMANDS] form.addField(data_form.Field(fieldType="list-single", var="command", options=commands, required=True)) payload = form.toElement() status = self._c.STATUS.EXECUTING defer.returnValue((payload, status, None, None))