e8fb0a8a28
Implement XEP-0343: Signaling WebRTC Data Channels in Jingle. The current version of the XEP (0.3.1) has no implementation and contains some flaws. After discussing this on xsf@, Daniel (from Conversations) mentioned that they had a sprint with Larma (from Dino) to work on another version and provided me with this link: https://gist.github.com/iNPUTmice/6c56f3e948cca517c5fb129016d99e74 . I have used it for my implementation. This implementation reuses work done on Jingle A/V call (notably XEP-0176 and XEP-0167 plugins), with adaptations. When used, XEP-0234 will not handle the file itself as it normally does. This is because WebRTC has several implementations (browser for web interface, GStreamer for others), and file/data must be handled directly by the frontend. This is particularly important for web frontends, as the file is not sent from the backend but from the end-user's browser device. Among the changes, there are: - XEP-0343 implementation. - `file_send` bridge method now use serialised dict as output. - New `BaseTransportHandler.is_usable` method which get content data and returns a boolean (default to `True`) to tell if this transport can actually be used in this context (when we are initiator). Used in webRTC case to see if call data are available. - Support of `application` media type, and everything necessary to handle data channels. - Better confirmation message, with file name, size and description when available. - When file is accepted in preflight, it is specified in following `action_new` signal for actual file transfer. This way, frontend can avoid the display or 2 confirmation messages. - XEP-0166: when not specified, default `content` name is now its index number instead of a UUID. This follows the behaviour of browsers. - XEP-0353: better handling of events such as call taken by another device. - various other updates. rel 441
79 lines
2.7 KiB
Python
79 lines
2.7 KiB
Python
#!/usr/bin/env python3
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# SAT: a jabber client
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# Copyright (C) 2009-2021 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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"""Misc usefull classes"""
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from typing import Tuple, Any
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from libervia.backend.core.xmpp import SatXMPPEntity
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from . import trigger as sync_trigger
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from . import utils
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from twisted.internet import defer
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class TriggerManager(sync_trigger.TriggerManager):
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"""This is a TriggerManager with an new async_point method"""
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async def async_point(
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self,
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point_name: str,
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*args, **kwargs
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) -> bool:
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"""This put a trigger point with potentially async Deferred
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All the triggers for that point will be run
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@param point_name: name of the trigger point
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@param *args: args to transmit to trigger
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@param *kwargs: kwargs to transmit to trigger
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if "triggers_no_cancel" is present, it will be popped out
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when set to True, this argument don't let triggers stop
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the workflow
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@return D(bool): True if the action must be continued, False else
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"""
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if point_name not in self.__triggers:
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return True
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can_cancel = not kwargs.pop('triggers_no_cancel', False)
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for __, trigger in self.__triggers[point_name]:
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try:
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cont = await utils.as_deferred(trigger, *args, **kwargs)
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if can_cancel and not cont:
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return False
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except sync_trigger.SkipOtherTriggers:
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break
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return True
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async def async_return_point(
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self,
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point_name: str,
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*args, **kwargs
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) -> Tuple[bool, Any]:
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"""Async version of return_point"""
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if point_name not in self.__triggers:
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return True, None
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for priority, trigger in self.__triggers[point_name]:
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try:
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cont, ret_value = await utils.as_deferred(trigger, *args, **kwargs)
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if not cont:
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return False, ret_value
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except sync_trigger.SkipOtherTriggers:
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break
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return True, None
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