view libervia/backend/bridge/pb.py @ 4094:c3b68fdc2de7

component AP gateway: fix handling of XMPP comments authors: the gateway was supposing that comments where emitted from PEP of author. While this is the case for most blog posts, it's not for comments. Instead the component is now using `author_jid` which is retrieved by XEP-0277 plugin, and reject the item if the auhor is not verified (i.e. if `publisher` attribute is not set by XMPP service).
author Goffi <goffi@goffi.org>
date Mon, 12 Jun 2023 14:50:43 +0200
parents 4b842c1fb686
children 02f0adc745c6
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#!/usr/bin/env python3


# SAT: a jabber client
# 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 dataclasses
from functools import partial
from pathlib import Path
from twisted.spread import jelly, pb
from twisted.internet import reactor
from libervia.backend.core.log import getLogger
from libervia.backend.tools import config

log = getLogger(__name__)


## jelly hack
# we monkey patch jelly to handle namedtuple
ori_jelly = jelly._Jellier.jelly


def fixed_jelly(self, obj):
    """this method fix handling of namedtuple"""
    if isinstance(obj, tuple) and not obj is tuple:
        obj = tuple(obj)
    return ori_jelly(self, obj)


jelly._Jellier.jelly = fixed_jelly


@dataclasses.dataclass(eq=False)
class HandlerWrapper:
    # we use a wrapper to keep signals handlers because RemoteReference doesn't support
    # comparison (other than equality), making it unusable with a list
    handler: pb.RemoteReference


class PBRoot(pb.Root):
    def __init__(self):
        self.signals_handlers = []

    def remote_init_bridge(self, signals_handler):
        self.signals_handlers.append(HandlerWrapper(signals_handler))
        log.info("registered signal handler")

    def send_signal_eb(self, failure_, signal_name):
        if not failure_.check(pb.PBConnectionLost):
            log.error(
                f"Error while sending signal {signal_name}: {failure_}",
            )

    def send_signal(self, name, args, kwargs):
        to_remove = []
        for wrapper in self.signals_handlers:
            handler = wrapper.handler
            try:
                d = handler.callRemote(name, *args, **kwargs)
            except pb.DeadReferenceError:
                to_remove.append(wrapper)
            else:
                d.addErrback(self.send_signal_eb, name)
        if to_remove:
            for wrapper in to_remove:
                log.debug("Removing signal handler for dead frontend")
                self.signals_handlers.remove(wrapper)

    def _bridge_deactivate_signals(self):
        if hasattr(self, "signals_paused"):
            log.warning("bridge signals already deactivated")
            if self.signals_handler:
                self.signals_paused.extend(self.signals_handler)
        else:
            self.signals_paused = self.signals_handlers
        self.signals_handlers = []
        log.debug("bridge signals have been deactivated")

    def _bridge_reactivate_signals(self):
        try:
            self.signals_handlers = self.signals_paused
        except AttributeError:
            log.debug("signals were already activated")
        else:
            del self.signals_paused
            log.debug("bridge signals have been reactivated")

##METHODS_PART##


class bridge(object):
    def __init__(self):
        log.info("Init Perspective Broker...")
        self.root = PBRoot()
        conf = config.parse_main_conf()
        get_conf = partial(config.get_conf, conf, "bridge_pb", "")
        conn_type = get_conf("connection_type", "unix_socket")
        if conn_type == "unix_socket":
            local_dir = Path(config.config_get(conf, "", "local_dir")).resolve()
            socket_path = local_dir / "bridge_pb"
            log.info(f"using UNIX Socket at {socket_path}")
            reactor.listenUNIX(
                str(socket_path), pb.PBServerFactory(self.root), mode=0o600
            )
        elif conn_type == "socket":
            port = int(get_conf("port", 8789))
            log.info(f"using TCP Socket at port {port}")
            reactor.listenTCP(port, pb.PBServerFactory(self.root))
        else:
            raise ValueError(f"Unknown pb connection type: {conn_type!r}")

    def send_signal(self, name, *args, **kwargs):
        self.root.send_signal(name, args, kwargs)

    def remote_init_bridge(self, signals_handler):
        self.signals_handlers.append(signals_handler)
        log.info("registered signal handler")

    def register_method(self, name, callback):
        log.debug("registering PB bridge method [%s]" % name)
        setattr(self.root, "remote_" + name, callback)
        #  self.root.register_method(name, callback)

    def add_method(
            self, name, int_suffix, in_sign, out_sign, method, async_=False, doc={}
    ):
        """Dynamically add a method to PB bridge"""
        # FIXME: doc parameter is kept only temporary, the time to remove it from calls
        log.debug("Adding method {name} to PB bridge".format(name=name))
        self.register_method(name, method)

    def add_signal(self, name, int_suffix, signature, doc={}):
        log.debug("Adding signal {name} to PB bridge".format(name=name))
        setattr(
            self, name, lambda *args, **kwargs: self.send_signal(name, *args, **kwargs)
        )

    def bridge_deactivate_signals(self):
        """Stop sending signals to bridge

        Mainly used for mobile frontends, when the frontend is paused
        """
        self.root._bridge_deactivate_signals()

    def bridge_reactivate_signals(self):
        """Send again signals to bridge

        Should only be used after bridge_deactivate_signals has been called
        """
        self.root._bridge_reactivate_signals()

    def _debug(self, action, params, profile):
        self.send_signal("_debug", action, params, profile)

    def action_new(self, action_data, id, security_limit, profile):
        self.send_signal("action_new", action_data, id, security_limit, profile)

    def connected(self, jid_s, profile):
        self.send_signal("connected", jid_s, profile)

    def contact_deleted(self, entity_jid, profile):
        self.send_signal("contact_deleted", entity_jid, profile)

    def contact_new(self, contact_jid, attributes, groups, profile):
        self.send_signal("contact_new", contact_jid, attributes, groups, profile)

    def disconnected(self, profile):
        self.send_signal("disconnected", profile)

    def entity_data_updated(self, jid, name, value, profile):
        self.send_signal("entity_data_updated", jid, name, value, profile)

    def message_encryption_started(self, to_jid, encryption_data, profile_key):
        self.send_signal("message_encryption_started", to_jid, encryption_data, profile_key)

    def message_encryption_stopped(self, to_jid, encryption_data, profile_key):
        self.send_signal("message_encryption_stopped", to_jid, encryption_data, profile_key)

    def message_new(self, uid, timestamp, from_jid, to_jid, message, subject, mess_type, extra, profile):
        self.send_signal("message_new", uid, timestamp, from_jid, to_jid, message, subject, mess_type, extra, profile)

    def param_update(self, name, value, category, profile):
        self.send_signal("param_update", name, value, category, profile)

    def presence_update(self, entity_jid, show, priority, statuses, profile):
        self.send_signal("presence_update", entity_jid, show, priority, statuses, profile)

    def progress_error(self, id, error, profile):
        self.send_signal("progress_error", id, error, profile)

    def progress_finished(self, id, metadata, profile):
        self.send_signal("progress_finished", id, metadata, profile)

    def progress_started(self, id, metadata, profile):
        self.send_signal("progress_started", id, metadata, profile)

    def subscribe(self, sub_type, entity_jid, profile):
        self.send_signal("subscribe", sub_type, entity_jid, profile)