Mercurial > libervia-backend
view sat/bridge/bridge_constructor/constructors/pb/pb_frontend_template.py @ 3792:865167c34b82
comp AP gateway: convert pubsub item retractation to AP `Delete` activity:
when an item `retract` is received from a node from which an AP actor is subscribed, a
corresponding `Delete` activity is created and sent to AP followers.
Trying to retract an item from a virtual node of the gateway pubsub service now return a
`forbidden` stanza error (those nodes are handled on AP side and thus are not owned by
XMPP entities).
rel 367
author | Goffi <goffi@goffi.org> |
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date | Fri, 17 Jun 2022 14:15:23 +0200 |
parents | 3c7a64d6f49f |
children | 524856bd7b19 |
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#!/usr/bin/env python3 # SàT communication bridge # Copyright (C) 2009-2021 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/>. import asyncio from logging import getLogger from functools import partial from pathlib import Path from twisted.spread import pb from twisted.internet import reactor, defer from twisted.internet.error import ConnectionRefusedError, ConnectError from sat.core import exceptions from sat.tools import config from sat_frontends.bridge.bridge_frontend import BridgeException log = getLogger(__name__) class SignalsHandler(pb.Referenceable): def __getattr__(self, name): if name.startswith("remote_"): log.debug("calling an unregistered signal: {name}".format(name=name[7:])) return lambda *args, **kwargs: None else: raise AttributeError(name) def register_signal(self, name, handler, iface="core"): log.debug("registering signal {name}".format(name=name)) method_name = "remote_" + name try: self.__getattribute__(method_name) except AttributeError: pass else: raise exceptions.InternalError( "{name} signal handler has been registered twice".format( name=method_name ) ) setattr(self, method_name, handler) class Bridge(object): def __init__(self): self.signals_handler = SignalsHandler() def __getattr__(self, name): return partial(self.call, name) def _generic_errback(self, err): log.error(f"bridge error: {err}") def _errback(self, failure_, ori_errback): """Convert Failure to BridgeException""" ori_errback( BridgeException( name=failure_.type.decode('utf-8'), message=str(failure_.value) ) ) def remoteCallback(self, result, callback): """call callback with argument or None if result is not None not argument is used, else result is used as argument @param result: remote call result @param callback(callable): method to call on result """ if result is None: callback() else: callback(result) def call(self, name, *args, **kwargs): """call a remote method @param name(str): name of the bridge method @param args(list): arguments may contain callback and errback as last 2 items @param kwargs(dict): keyword arguments may contain callback and errback """ callback = errback = None if kwargs: try: callback = kwargs.pop("callback") except KeyError: pass try: errback = kwargs.pop("errback") except KeyError: pass elif len(args) >= 2 and callable(args[-1]) and callable(args[-2]): errback = args.pop() callback = args.pop() d = self.root.callRemote(name, *args, **kwargs) if callback is not None: d.addCallback(self.remoteCallback, callback) if errback is not None: d.addErrback(errback) def _initBridgeEb(self, failure_): log.error("Can't init bridge: {msg}".format(msg=failure_)) return failure_ def _set_root(self, root): """set remote root object bridge will then be initialised """ self.root = root d = root.callRemote("initBridge", self.signals_handler) d.addErrback(self._initBridgeEb) return d def getRootObjectEb(self, failure_): """Call errback with appropriate bridge error""" if failure_.check(ConnectionRefusedError, ConnectError): raise exceptions.BridgeExceptionNoService else: raise failure_ def bridgeConnect(self, callback, errback): factory = pb.PBClientFactory() conf = config.parseMainConf() getConf = partial(config.getConf, conf, "bridge_pb", "") conn_type = getConf("connection_type", "unix_socket") if conn_type == "unix_socket": local_dir = Path(config.getConfig(conf, "", "local_dir")).resolve() socket_path = local_dir / "bridge_pb" reactor.connectUNIX(str(socket_path), factory) elif conn_type == "socket": host = getConf("host", "localhost") port = int(getConf("port", 8789)) reactor.connectTCP(host, port, factory) else: raise ValueError(f"Unknown pb connection type: {conn_type!r}") d = factory.getRootObject() d.addCallback(self._set_root) if callback is not None: d.addCallback(lambda __: callback()) d.addErrback(self.getRootObjectEb) if errback is not None: d.addErrback(lambda failure_: errback(failure_.value)) return d def register_signal(self, functionName, handler, iface="core"): self.signals_handler.register_signal(functionName, handler, iface) ##METHODS_PART## class AIOSignalsHandler(SignalsHandler): def register_signal(self, name, handler, iface="core"): async_handler = lambda *args, **kwargs: defer.Deferred.fromFuture( asyncio.ensure_future(handler(*args, **kwargs))) return super().register_signal(name, async_handler, iface) class AIOBridge(Bridge): def __init__(self): self.signals_handler = AIOSignalsHandler() def _errback(self, failure_): """Convert Failure to BridgeException""" raise BridgeException( name=failure_.type.decode('utf-8'), message=str(failure_.value) ) def call(self, name, *args, **kwargs): d = self.root.callRemote(name, *args, *kwargs) d.addErrback(self._errback) return d.asFuture(asyncio.get_event_loop()) async def bridgeConnect(self): d = super().bridgeConnect(callback=None, errback=None) return await d.asFuture(asyncio.get_event_loop()) ##ASYNC_METHODS_PART##