diff --git a/sylk/applications/webrtcgateway/handler.py b/sylk/applications/webrtcgateway/handler.py index 3aa3407..72d243e 100644 --- a/sylk/applications/webrtcgateway/handler.py +++ b/sylk/applications/webrtcgateway/handler.py @@ -1,1300 +1,1300 @@ import hashlib import json import random import re import time import uuid from application.python import limit from application.python.weakref import defaultweakobjectmap from application.system import makedirs from eventlib import coros, proc from eventlib.twistedutil import block_on from sipsimple.configuration.settings import SIPSimpleSettings from sipsimple.core import SIPURI from sipsimple.lookup import DNSLookup, DNSLookupError from sipsimple.threading.green import call_in_green_thread, run_in_green_thread from string import maketrans from twisted.internet import reactor from sylk.applications.webrtcgateway.configuration import GeneralConfig, get_room_config from sylk.applications.webrtcgateway.janus import JanusBackend, JanusError from sylk.applications.webrtcgateway.logger import ConnectionLogger, VideoroomLogger from sylk.applications.webrtcgateway.models import sylkrtc from sylk.applications.webrtcgateway.storage import TokenStorage SIP_PREFIX_RE = re.compile('^sips?:') class AccountInfo(object): def __init__(self, id, password, display_name=None, user_agent=None): self.id = id self.password = password self.display_name = display_name self.user_agent = user_agent self.registration_state = None self.janus_handle_id = None @property def uri(self): - return 'sip:%s' % self.id + return 'sip:' + self.id @property def user_data(self): return dict(username=self.uri, display_name=self.display_name, user_agent=self.user_agent, ha1_secret=self.password) class SessionPartyIdentity(object): def __init__(self, uri, display_name=''): self.uri = uri self.display_name = display_name # todo: might need to replace this auto-resetting descriptor with a timer in case we need to know when the slow link state expired # class SlowLinkState(object): def __init__(self): self.slow_link = False self.last_reported = 0 class SlowLinkDescriptor(object): __timeout__ = 30 # 30 seconds def __init__(self): self.values = defaultweakobjectmap(SlowLinkState) def __get__(self, instance, owner): if instance is None: return self state = self.values[instance] if state.slow_link and time.time() - state.last_reported > self.__timeout__: state.slow_link = False return state.slow_link def __set__(self, instance, value): state = self.values[instance] if value: state.last_reported = time.time() state.slow_link = bool(value) def __delete__(self, instance): raise AttributeError('Attribute cannot be deleted') class SIPSessionInfo(object): slow_download = SlowLinkDescriptor() slow_upload = SlowLinkDescriptor() def __init__(self, id): self.id = id self.direction = None self.state = None self.account_id = None self.local_identity = None # instance of SessionPartyIdentity self.remote_identity = None # instance of SessionPartyIdentity self.janus_handle_id = None self.slow_download = False self.slow_upload = False def init_outgoing(self, account_id, destination): self.account_id = account_id self.direction = 'outgoing' self.state = 'connecting' self.local_identity = SessionPartyIdentity(account_id) self.remote_identity = SessionPartyIdentity(destination) def init_incoming(self, account_id, originator, originator_display_name=''): self.account_id = account_id self.direction = 'incoming' self.state = 'connecting' self.local_identity = SessionPartyIdentity(account_id) self.remote_identity = SessionPartyIdentity(originator, originator_display_name) class Videoroom(object): def __init__(self, uri): self.id = random.getrandbits(32) # janus needs numeric room names self.uri = uri self.config = get_room_config(uri) self.log = VideoroomLogger(self) self._active_participants = [] self._sessions = set() self._id_map = {} # map session.id -> session and session.publisher_id -> session if self.config.record: makedirs(self.config.recording_dir, 0o755) self.log.info('created (recording on)') else: self.log.info('created') @property def active_participants(self): return self._active_participants @active_participants.setter def active_participants(self, participant_list): unknown_participants = set(participant_list).difference(self._id_map) if unknown_participants: raise ValueError('unknown participant session id: {}'.format(', '.join(unknown_participants))) if self._active_participants != participant_list: self._active_participants = participant_list self.log.info('active participants: {}'.format(', '.join(self._active_participants) or None)) self._update_bitrate() def add(self, session): assert session not in self._sessions assert session.publisher_id is not None assert session.publisher_id not in self._id_map and session.id not in self._id_map self._sessions.add(session) self._id_map[session.id] = self._id_map[session.publisher_id] = session self.log.info('{session.account_id} has joined the room'.format(session=session)) self._update_bitrate() if self._active_participants: session.owner.send(sylkrtc.VideoroomConfigureEvent(session=session.id, active_participants=self._active_participants, originator='videoroom')) def discard(self, session): if session in self._sessions: self._sessions.discard(session) self._id_map.pop(session.id, None) self._id_map.pop(session.publisher_id, None) self.log.info('{session.account_id} has left the room'.format(session=session)) if session.id in self._active_participants: self._active_participants.remove(session.id) self.log.info('active participants: {}'.format(', '.join(self._active_participants) or None)) for session in self._sessions: session.owner.send(sylkrtc.VideoroomConfigureEvent(session=session.id, active_participants=self._active_participants, originator='videoroom')) self._update_bitrate() def remove(self, session): self._sessions.remove(session) self._id_map.pop(session.id) self._id_map.pop(session.publisher_id) self.log.info('{session.account_id} has left the room'.format(session=session)) if session.id in self._active_participants: self._active_participants.remove(session.id) self.log.info('active participants: {}'.format(', '.join(self._active_participants) or None)) for session in self._sessions: session.owner.send(sylkrtc.VideoroomConfigureEvent(session=session.id, active_participants=self._active_participants, originator='videoroom')) self._update_bitrate() def clear(self): for session in self._sessions: self.log.info('{session.account_id} has left the room'.format(session=session)) self._active_participants = [] self._sessions.clear() self._id_map.clear() def allow_uri(self, uri): config = self.config if config.access_policy == 'allow,deny': return config.allow.match(uri) and not config.deny.match(uri) else: return not config.deny.match(uri) or config.allow.match(uri) def _update_bitrate(self): if self._sessions: if self._active_participants: # todo: should we use max_bitrate / 2 or max_bitrate for each active participant if there are 2 active participants? active_participant_bitrate = self.config.max_bitrate // len(self._active_participants) other_participant_bitrate = 100000 self.log.info('participant bitrate is {} (active) / {} (others)'.format(active_participant_bitrate, other_participant_bitrate)) for session in self._sessions: if session.id in self._active_participants: bitrate = active_participant_bitrate else: bitrate = other_participant_bitrate if session.bitrate != bitrate: session.bitrate = bitrate data = dict(request='configure', room=self.id, bitrate=bitrate) session.owner.janus.message(session.owner.janus_session_id, session.janus_handle_id, data) else: bitrate = self.config.max_bitrate // limit(len(self._sessions) - 1, min=1) self.log.info('participant bitrate is {}'.format(bitrate)) for session in self._sessions: if session.bitrate != bitrate: session.bitrate = bitrate data = dict(request='configure', room=self.id, bitrate=bitrate) session.owner.janus.message(session.owner.janus_session_id, session.janus_handle_id, data) # todo: make Videoroom be a context manager that is retained/released on enter/exit and implement __nonzero__ to be different from __len__ # todo: so that a videoroom is not accidentally released by the last participant leaving while a new participant waits to join # todo: this needs a new model for communication with janus and the client that is pseudo-synchronous (uses green threads) def __len__(self): return len(self._sessions) def __iter__(self): return iter(self._sessions) def __getitem__(self, key): return self._id_map[key] def __contains__(self, item): return item in self._id_map or item in self._sessions class PublisherFeedContainer(object): """A container for the other participant's publisher sessions that we have subscribed to""" def __init__(self): self._publishers = set() self._id_map = {} # map publisher.id -> publisher and publisher.publisher_id -> publisher def add(self, session): assert session not in self._publishers assert session.id not in self._id_map and session.publisher_id not in self._id_map self._publishers.add(session) self._id_map[session.id] = self._id_map[session.publisher_id] = session def discard(self, item): # item can be any of session, session.id or session.publisher_id session = self._id_map[item] if item in self._id_map else item if item in self._publishers else None if session is not None: self._publishers.discard(session) self._id_map.pop(session.id, None) self._id_map.pop(session.publisher_id, None) def remove(self, item): # item can be any of session, session.id or session.publisher_id session = self._id_map[item] if item in self._id_map else item self._publishers.remove(session) self._id_map.pop(session.id) self._id_map.pop(session.publisher_id) def pop(self, item): # item can be any of session, session.id or session.publisher_id session = self._id_map[item] if item in self._id_map else item self._publishers.remove(session) self._id_map.pop(session.id) self._id_map.pop(session.publisher_id) return session def clear(self): self._publishers.clear() self._id_map.clear() def __len__(self): return len(self._publishers) def __iter__(self): return iter(self._publishers) def __getitem__(self, key): return self._id_map[key] def __contains__(self, item): return item in self._id_map or item in self._publishers class VideoroomSessionInfo(object): slow_download = SlowLinkDescriptor() slow_upload = SlowLinkDescriptor() def __init__(self, id, owner): self.id = id self.owner = owner self.account_id = None self.type = None # publisher / subscriber self.publisher_id = None # janus publisher ID for publishers / publisher session ID for subscribers self.janus_handle_id = None self.room = None self.bitrate = None self.parent_session = None self.slow_download = False self.slow_upload = False self.feeds = PublisherFeedContainer() # keeps references to all the other participant's publisher feeds that we subscribed to def initialize(self, account_id, type, room): assert type in ('publisher', 'subscriber') self.account_id = account_id self.type = type self.room = room self.bitrate = room.config.max_bitrate def __repr__(self): return '<%s: id=%s janus_handle_id=%s type=%s>' % (self.__class__.__name__, self.id, self.janus_handle_id, self.type) class SessionContainer(object): def __init__(self): self._sessions = set() self._id_map = {} # map session.id -> session and session.janus_handle_id -> session def add(self, session): assert session not in self._sessions assert session.id not in self._id_map and session.janus_handle_id not in self._id_map self._sessions.add(session) self._id_map[session.id] = self._id_map[session.janus_handle_id] = session def discard(self, item): # item can be any of session, session.id or session.janus_handle_id session = self._id_map[item] if item in self._id_map else item if item in self._sessions else None if session is not None: self._sessions.discard(session) self._id_map.pop(session.id, None) self._id_map.pop(session.janus_handle_id, None) def remove(self, item): # item can be any of session, session.id or session.janus_handle_id session = self._id_map[item] if item in self._id_map else item self._sessions.remove(session) self._id_map.pop(session.id) self._id_map.pop(session.janus_handle_id) def pop(self, item): # item can be any of session, session.id or session.janus_handle_id session = self._id_map[item] if item in self._id_map else item self._sessions.remove(session) self._id_map.pop(session.id) self._id_map.pop(session.janus_handle_id) return session def clear(self): self._sessions.clear() self._id_map.clear() def __len__(self): return len(self._sessions) def __iter__(self): return iter(self._sessions) def __getitem__(self, key): return self._id_map[key] def __contains__(self, item): return item in self._id_map or item in self._sessions class OperationName(str): __normalizer__ = maketrans('-', '_') @property def normalized(self): return self.translate(self.__normalizer__) class Operation(object): __slots__ = 'type', 'name', 'data' __types__ = 'request', 'event' # noinspection PyShadowingBuiltins def __init__(self, type, name, data): if type not in self.__types__: raise ValueError("Can't instantiate class {.__class__.__name__} with unknown type: {!r}".format(self, type)) self.type = type self.name = OperationName(name) self.data = data class APIError(Exception): pass class GreenEvent(object): def __init__(self): self._event = coros.event() def set(self): if self._event.ready(): return self._event.send(True) def is_set(self): return self._event.ready() def clear(self): if self._event.ready(): self._event.reset() def wait(self): return self._event.wait() class ConnectionHandler(object): janus = JanusBackend() def __init__(self, protocol): self.protocol = protocol self.device_id = hashlib.md5(protocol.peer).digest().encode('base64').rstrip('=\n') self.janus_session_id = None self.accounts_map = {} # account ID -> account self.account_handles_map = {} # Janus handle ID -> account self.sip_sessions = SessionContainer() # keeps references to all the SIP sessions created or received by this device self.videoroom_sessions = SessionContainer() # keeps references to all the videoroom sessions created by this participant (as publisher and subscriber) self.ready_event = GreenEvent() self.resolver = DNSLookup() self.proc = proc.spawn(self._operations_handler) self.operations_queue = coros.queue() self.log = ConnectionLogger(self) self.state = None self._stop_pending = False @run_in_green_thread def start(self): self.state = 'starting' try: self.janus_session_id = block_on(self.janus.create_session()) except Exception as e: self.state = 'failed' self.log.warning('could not create session, disconnecting: %s' % e) if self._stop_pending: # if stop was already called it means we were already disconnected self.stop() else: self.protocol.disconnect(3000, unicode(e)) else: self.state = 'started' self.ready_event.set() if self._stop_pending: self.stop() else: self.send(sylkrtc.ReadyEvent()) def stop(self): if self.state in (None, 'starting'): self._stop_pending = True return self.state = 'stopping' self._stop_pending = False if self.proc is not None: # Kill the operation's handler proc first, in order to not have any operations active while we cleanup. self.proc.kill() # Also proc.kill() will switch to another green thread, which is another reason to do it first so that self.proc = None # we do not switch to another green thread in the middle of the cleanup with a partially deleted handler if self.ready_event.is_set(): # Do not explicitly detach the janus plugin handles before destroying the janus session. Janus runs each request in a different # thread, so making detach and destroy request without waiting for the detach to finish can result in errors from race conditions. # Because we do not want to wait for them, we will rely instead on the fact that janus automatically detaches the plugin handles # when it destroys a session, so we only remove our event handlers and issue a destroy request for the session. for account_info in self.accounts_map.values(): if account_info.janus_handle_id is not None: self.janus.set_event_handler(account_info.janus_handle_id, None) for session in self.sip_sessions: if session.janus_handle_id is not None: self.janus.set_event_handler(session.janus_handle_id, None) for session in self.videoroom_sessions: if session.janus_handle_id is not None: self.janus.set_event_handler(session.janus_handle_id, None) session.room.discard(session) session.feeds.clear() self.janus.destroy_session(self.janus_session_id) # this automatically detaches all plugin handles associated with it, not need to manually do it # cleanup self.ready_event.clear() self.accounts_map.clear() self.account_handles_map.clear() self.sip_sessions.clear() self.videoroom_sessions.clear() self.janus_session_id = None self.protocol = None self.state = 'stopped' def handle_message(self, message): try: request = sylkrtc.SylkRTCRequest.from_message(message) except sylkrtc.ProtocolError as e: self.log.error(str(e)) except Exception as e: self.log.error('{request_type}: {exception!s}'.format(request_type=message['sylkrtc'], exception=e)) if 'transaction' in message: self.send(sylkrtc.ErrorResponse(transaction=message['transaction'], error=str(e))) else: operation = Operation(type='request', name=request.sylkrtc, data=request) self.operations_queue.send(operation) def send(self, message): if self.protocol is not None: self.protocol.sendMessage(json.dumps(message.__data__)) # internal methods (not overriding / implementing the protocol API) def _cleanup_session(self, session): # should only be called from a green thread. if self.janus_session_id is None: # The connection was closed, there is noting to do return if session in self.sip_sessions: self.sip_sessions.remove(session) if session.direction == 'outgoing': # Destroy plugin handle for outgoing sessions. For incoming ones it's the same as the account handle, so don't block_on(self.janus.detach(self.janus_session_id, session.janus_handle_id)) self.janus.set_event_handler(session.janus_handle_id, None) def _cleanup_videoroom_session(self, session): # should only be called from a green thread. if self.janus_session_id is None: # The connection was closed, there is noting to do return if session in self.videoroom_sessions: self.videoroom_sessions.remove(session) if session.type == 'publisher': session.room.discard(session) session.feeds.clear() block_on(self.janus.detach(self.janus_session_id, session.janus_handle_id)) self.janus.set_event_handler(session.janus_handle_id, None) self._maybe_destroy_videoroom(session.room) else: session.parent_session.feeds.discard(session.publisher_id) block_on(self.janus.detach(self.janus_session_id, session.janus_handle_id)) self.janus.set_event_handler(session.janus_handle_id, None) def _maybe_destroy_videoroom(self, videoroom): # should only be called from a green thread. if self.protocol is None or self.janus_session_id is None: # The connection was closed, there is nothing to do return if videoroom in self.protocol.factory.videorooms and not videoroom: self.protocol.factory.videorooms.remove(videoroom) # create a handle to do the cleanup handle_id = block_on(self.janus.attach(self.janus_session_id, 'janus.plugin.videoroom')) self.janus.set_event_handler(handle_id, self._handle_janus_event_videoroom) data = dict(request='destroy', room=videoroom.id) try: block_on(self.janus.message(self.janus_session_id, handle_id, data)) except JanusError: pass block_on(self.janus.detach(self.janus_session_id, handle_id)) self.janus.set_event_handler(handle_id, None) videoroom.log.info('destroyed') def _lookup_sip_proxy(self, uri): # The proxy dance: Sofia-SIP seems to do a DNS lookup per SIP message when a domain is passed # as the proxy, so do the resolution ourselves and give it pre-resolver proxy URL. Since we use # caching to avoid long delays, we randomize the results matching the highest priority route's # transport. proxy = GeneralConfig.outbound_sip_proxy if proxy is not None: sip_uri = SIPURI(host=proxy.host, port=proxy.port, parameters={'transport': proxy.transport}) else: sip_uri = SIPURI.parse('sip:%s' % uri) settings = SIPSimpleSettings() try: routes = self.resolver.lookup_sip_proxy(sip_uri, settings.sip.transport_list).wait() except DNSLookupError as e: raise DNSLookupError('DNS lookup error: {exception!s}'.format(exception=e)) if not routes: raise DNSLookupError('DNS lookup error: no results found') route = random.choice([r for r in routes if r.transport == routes[0].transport]) self.log.debug('DNS lookup for SIP proxy for {} yielded {}'.format(uri, route)) # Build a proxy URI Sofia-SIP likes return 'sips:{route.address}:{route.port}'.format(route=route) if route.transport == 'tls' else str(route.uri) def _handle_janus_event_sip(self, handle_id, event_type, event): # TODO: use a model self.log.debug('janus SIP event: type={event_type} handle_id={handle_id} event={event}'.format(event_type=event_type, handle_id=handle_id, event=event)) operation = Operation(type='event', name='janus-event-sip', data=dict(handle_id=handle_id, event_type=event_type, event=event)) self.operations_queue.send(operation) def _handle_janus_event_videoroom(self, handle_id, event_type, event): # TODO: use a model self.log.debug('janus video room event: type={event_type} handle_id={handle_id} event={event}'.format(event_type=event_type, handle_id=handle_id, event=event)) operation = Operation(type='event', name='janus-event-videoroom', data=dict(handle_id=handle_id, event_type=event_type, event=event)) self.operations_queue.send(operation) def _operations_handler(self): self.ready_event.wait() while True: operation = self.operations_queue.wait() handler = getattr(self, '_OH_' + operation.type) handler(operation) del operation, handler def _OH_request(self, operation): handler = getattr(self, '_RH_' + operation.name.normalized) request = operation.data try: handler(request) except (APIError, DNSLookupError, JanusError) as e: self.log.error('{operation.name}: {exception!s}'.format(operation=operation, exception=e)) self.send(sylkrtc.ErrorResponse(transaction=request.transaction, error=str(e))) except Exception as e: self.log.exception('{operation.type} {operation.name}: {exception!s}'.format(operation=operation, exception=e)) self.send(sylkrtc.ErrorResponse(transaction=request.transaction, error='Internal error')) else: self.send(sylkrtc.AckResponse(transaction=request.transaction)) def _OH_event(self, operation): handler = getattr(self, '_EH_' + operation.name.normalized) try: handler(operation.data) except Exception as e: self.log.exception('{operation.type} {operation.name}: {exception!s}'.format(operation=operation, exception=e)) # Request handlers def _RH_account_add(self, request): if request.account in self.accounts_map: raise APIError('Account {request.account} already added'.format(request=request)) # check if domain is acceptable domain = request.account.partition('@')[2] if not {'*', domain}.intersection(GeneralConfig.sip_domains): raise APIError('SIP domain not allowed: %s' % domain) # Create and store our mapping account_info = AccountInfo(request.account, request.password, request.display_name, request.user_agent) self.accounts_map[account_info.id] = account_info self.log.info('added account {request.account} using {request.user_agent}'.format(request=request)) def _RH_account_remove(self, request): try: account_info = self.accounts_map.pop(request.account) except KeyError: raise APIError('Unknown account specified: {request.account}'.format(request=request)) # cleanup in case the client didn't unregister before removing the account handle_id = account_info.janus_handle_id if handle_id is not None: block_on(self.janus.detach(self.janus_session_id, handle_id)) self.janus.set_event_handler(handle_id, None) self.account_handles_map.pop(handle_id) self.log.info('removed account {request.account}'.format(request=request)) def _RH_account_register(self, request): try: account_info = self.accounts_map[request.account] except KeyError: raise APIError('Unknown account specified: {request.account}'.format(request=request)) proxy = self._lookup_sip_proxy(request.account) handle_id = account_info.janus_handle_id if handle_id is not None: # Destroy the existing plugin handle block_on(self.janus.detach(self.janus_session_id, handle_id)) self.janus.set_event_handler(handle_id, None) self.account_handles_map.pop(handle_id) account_info.janus_handle_id = None # Create a plugin handle handle_id = block_on(self.janus.attach(self.janus_session_id, 'janus.plugin.sip')) self.janus.set_event_handler(handle_id, self._handle_janus_event_sip) account_info.janus_handle_id = handle_id self.account_handles_map[handle_id] = account_info data = dict(request='register', proxy=proxy, **account_info.user_data) block_on(self.janus.message(self.janus_session_id, handle_id, data)) def _RH_account_unregister(self, request): try: account_info = self.accounts_map[request.account] except KeyError: raise APIError('Unknown account specified: {request.account}'.format(request=request)) handle_id = account_info.janus_handle_id if handle_id is not None: block_on(self.janus.detach(self.janus_session_id, handle_id)) self.janus.set_event_handler(handle_id, None) account_info.janus_handle_id = None self.account_handles_map.pop(handle_id) self.log.info('unregistered {request.account} from receiving incoming calls'.format(request=request)) def _RH_account_devicetoken(self, request): if request.account not in self.accounts_map: raise APIError('Unknown account specified: {request.account}'.format(request=request)) storage = TokenStorage() if request.old_token is not None: storage.remove(request.account, request.old_token) self.log.debug('removed token {request.old_token} for {request.account}'.format(request=request)) if request.new_token is not None: storage.add(request.account, request.new_token) self.log.debug('added token {request.new_token} for {request.account}'.format(request=request)) def _RH_session_create(self, request): if request.session in self.sip_sessions: raise APIError('Session ID {request.session} already in use'.format(request=request)) try: account_info = self.accounts_map[request.account] except KeyError: raise APIError('Unknown account specified: {request.account}'.format(request=request)) proxy = self._lookup_sip_proxy(request.uri) # Create a new plugin handle and 'register' it, without actually doing so handle_id = block_on(self.janus.attach(self.janus_session_id, 'janus.plugin.sip')) self.janus.set_event_handler(handle_id, self._handle_janus_event_sip) try: data = dict(request='register', send_register=False, proxy=proxy, **account_info.user_data) block_on(self.janus.message(self.janus_session_id, handle_id, data)) data = dict(request='call', uri='sip:%s' % SIP_PREFIX_RE.sub('', request.uri), srtp='sdes_optional') jsep = dict(type='offer', sdp=request.sdp) block_on(self.janus.message(self.janus_session_id, handle_id, data, jsep)) except: try: block_on(self.janus.detach(self.janus_session_id, handle_id)) except JanusError: pass self.janus.set_event_handler(handle_id, None) raise session_info = SIPSessionInfo(request.session) session_info.janus_handle_id = handle_id session_info.init_outgoing(request.account, request.uri) self.sip_sessions.add(session_info) self.log.info('created outgoing session {request.session} from {request.account} to {request.uri}'.format(request=request)) def _RH_session_answer(self, request): try: session_info = self.sip_sessions[request.session] except KeyError: raise APIError('Unknown session specified: {request.session}'.format(request=request)) if session_info.direction != 'incoming': raise APIError('Cannot answer outgoing session {request.session}'.format(request=request)) if session_info.state != 'connecting': raise APIError('Invalid state for answering session {session.id}: {session.state}'.format(session=session_info)) data = dict(request='accept') jsep = dict(type='answer', sdp=request.sdp) block_on(self.janus.message(self.janus_session_id, session_info.janus_handle_id, data, jsep)) self.log.info('answered incoming session {session.id}'.format(session=session_info)) def _RH_session_trickle(self, request): try: session_info = self.sip_sessions[request.session] except KeyError: raise APIError('Unknown session specified: {request.session}'.format(request=request)) if session_info.state == 'terminated': raise APIError('Session {request.session} is terminated'.format(request=request)) candidates = request.candidates.__data__ block_on(self.janus.trickle(self.janus_session_id, session_info.janus_handle_id, candidates)) if not candidates: self.log.debug('session {session.id} negotiated ICE'.format(session=session_info)) def _RH_session_terminate(self, request): try: session_info = self.sip_sessions[request.session] except KeyError: raise APIError('Unknown session specified: {request.session}'.format(request=request)) if session_info.state not in ('connecting', 'progress', 'accepted', 'established'): raise APIError('Invalid state for terminating session {session.id}: {session.state}'.format(session=session_info)) if session_info.direction == 'incoming' and session_info.state == 'connecting': data = dict(request='decline', code=486) else: data = dict(request='hangup') block_on(self.janus.message(self.janus_session_id, session_info.janus_handle_id, data)) self.log.info('requested termination for session {session.id}'.format(session=session_info)) def _RH_videoroom_join(self, request): if request.session in self.videoroom_sessions: raise APIError('Session ID {request.session} already in use'.format(request=request)) try: account_info = self.accounts_map[request.account] except KeyError: raise APIError('Unknown account specified: {request.account}'.format(request=request)) try: videoroom = self.protocol.factory.videorooms[request.uri] except KeyError: videoroom = Videoroom(request.uri) self.protocol.factory.videorooms.add(videoroom) if not videoroom.allow_uri(request.account): self._maybe_destroy_videoroom(videoroom) raise APIError('{request.account} is not allowed to join room {request.uri}'.format(request=request)) try: handle_id = block_on(self.janus.attach(self.janus_session_id, 'janus.plugin.videoroom')) self.janus.set_event_handler(handle_id, self._handle_janus_event_videoroom) try: # create the room if it doesn't exist config = videoroom.config data = dict(request='create', room=videoroom.id, publishers=10, bitrate=config.max_bitrate, videocodec=config.video_codec, record=config.record, rec_dir=config.recording_dir) try: block_on(self.janus.message(self.janus_session_id, handle_id, data)) except JanusError as e: if e.code != 427: # 427 means room already exists raise # join the room data = dict(request='joinandconfigure', room=videoroom.id, ptype='publisher', audio=True, video=True) if account_info.display_name: data.update(display=account_info.display_name) jsep = dict(type='offer', sdp=request.sdp) block_on(self.janus.message(self.janus_session_id, handle_id, data, jsep)) except: try: block_on(self.janus.detach(self.janus_session_id, handle_id)) except JanusError: pass self.janus.set_event_handler(handle_id, None) raise except: self._maybe_destroy_videoroom(videoroom) raise videoroom_session = VideoroomSessionInfo(request.session, owner=self) videoroom_session.janus_handle_id = handle_id videoroom_session.initialize(request.account, 'publisher', videoroom) self.videoroom_sessions.add(videoroom_session) self.send(sylkrtc.VideoroomSessionProgressEvent(session=videoroom_session.id)) self.log.info('created session {request.session} from account {request.account} to video room {request.uri}'.format(request=request)) def _RH_videoroom_leave(self, request): try: videoroom_session = self.videoroom_sessions[request.session] except KeyError: raise APIError('Unknown video room session: {request.session}'.format(request=request)) data = dict(request='leave') block_on(self.janus.message(self.janus_session_id, videoroom_session.janus_handle_id, data)) self.send(sylkrtc.VideoroomSessionTerminatedEvent(session=videoroom_session.id)) # safety net in case we do not get any answer for the leave request # todo: to be adjusted later after pseudo-synchronous communication with janus is implemented reactor.callLater(2, call_in_green_thread, self._cleanup_videoroom_session, videoroom_session) self.log.info('leaving video room session {request.session}'.format(request=request)) def _RH_videoroom_configure(self, request): try: videoroom_session = self.videoroom_sessions[request.session] except KeyError: raise APIError('Unknown video room session: {request.session}'.format(request=request)) videoroom = videoroom_session.room # todo: should we send out events if the active participant list did not change? try: videoroom.active_participants = request.active_participants except ValueError as e: raise APIError(str(e)) for session in videoroom: session.owner.send(sylkrtc.VideoroomConfigureEvent(session=session.id, active_participants=videoroom.active_participants, originator=request.session)) def _RH_videoroom_feed_attach(self, request): if request.feed in self.videoroom_sessions: raise APIError('Video room session ID {request.feed} already in use'.format(request=request)) # get the 'base' session, the one used to join and publish try: base_session = self.videoroom_sessions[request.session] except KeyError: raise APIError('Unknown video room session: {request.session}'.format(request=request)) # get the publisher's session try: publisher_session = base_session.room[request.publisher] except KeyError: raise APIError('Unknown publisher video room session to attach to: {request.publisher}'.format(request=request)) if publisher_session.publisher_id is None: raise APIError('Video room session {session.id} does not have a publisher ID'.format(session=publisher_session)) handle_id = block_on(self.janus.attach(self.janus_session_id, 'janus.plugin.videoroom')) self.janus.set_event_handler(handle_id, self._handle_janus_event_videoroom) # join the room as a listener try: data = dict(request='join', room=base_session.room.id, ptype='listener', feed=publisher_session.publisher_id) block_on(self.janus.message(self.janus_session_id, handle_id, data)) except: try: block_on(self.janus.detach(self.janus_session_id, handle_id)) except JanusError: pass self.janus.set_event_handler(handle_id, None) raise videoroom_session = VideoroomSessionInfo(request.feed, owner=self) videoroom_session.janus_handle_id = handle_id videoroom_session.parent_session = base_session videoroom_session.publisher_id = publisher_session.id videoroom_session.initialize(base_session.account_id, 'subscriber', base_session.room) self.videoroom_sessions.add(videoroom_session) base_session.feeds.add(publisher_session) def _RH_videoroom_feed_answer(self, request): try: videoroom_session = self.videoroom_sessions[request.feed] except KeyError: raise APIError('Unknown video room session: {request.feed}'.format(request=request)) if videoroom_session.parent_session.id != request.session: raise APIError('{request.feed} is not an attached feed of {request.session}'.format(request=request)) data = dict(request='start', room=videoroom_session.room.id) jsep = dict(type='answer', sdp=request.sdp) block_on(self.janus.message(self.janus_session_id, videoroom_session.janus_handle_id, data, jsep)) def _RH_videoroom_feed_detach(self, request): try: videoroom_session = self.videoroom_sessions[request.feed] except KeyError: raise APIError('Unknown video room session to detach: {request.feed}'.format(request=request)) if videoroom_session.parent_session.id != request.session: raise APIError('{request.feed} is not an attached feed of {request.session}'.format(request=request)) data = dict(request='leave') block_on(self.janus.message(self.janus_session_id, videoroom_session.janus_handle_id, data)) self._cleanup_videoroom_session(videoroom_session) def _RH_videoroom_invite(self, request): try: base_session = self.videoroom_sessions[request.session] account_info = self.accounts_map[base_session.account_id] except KeyError: raise APIError('Unknown video room session: {request.session}'.format(request=request)) room = base_session.room participants = set(request.participants) originator = sylkrtc.SIPIdentity(uri=account_info.id, display_name=account_info.display_name) event = sylkrtc.AccountConferenceInviteEvent(account='placeholder', room=room.uri, originator=originator) for protocol in self.protocol.factory.connections.difference([self.protocol]): connection_handler = protocol.connection_handler for account in participants.intersection(connection_handler.accounts_map): event.account = account connection_handler.send(event) room.log.info('invitation from %s for %s', originator.uri, account) connection_handler.log.info('received an invitation from %s for %s to join video room %s', originator.uri, account, room.uri) def _RH_videoroom_session_trickle(self, request): try: videoroom_session = self.videoroom_sessions[request.session] except KeyError: raise APIError('Unknown video room session: {request.session}'.format(request=request)) candidates = request.candidates.__data__ block_on(self.janus.trickle(self.janus_session_id, videoroom_session.janus_handle_id, candidates)) if not candidates and videoroom_session.type == 'publisher': self.log.debug('video room session {session.id} negotiated ICE'.format(session=videoroom_session)) def _RH_videoroom_session_update(self, request): try: videoroom_session = self.videoroom_sessions[request.session] except KeyError: raise APIError('Unknown video room session: {request.session}'.format(request=request)) update_data = request.options.__data__ if update_data: data = dict(request='configure', room=videoroom_session.room.id, **update_data) block_on(self.janus.message(self.janus_session_id, videoroom_session.janus_handle_id, data)) modified = ', '.join('{}={}'.format(key, update_data[key]) for key in update_data) self.log.info('updated video room session {request.session} with {modified}'.format(request=request, modified=modified)) # Event handlers def _EH_janus_event_sip(self, data): handle_id = data['handle_id'] event_type = data['event_type'] event = data['event'] if event_type == 'event': self._janus_event_plugin_sip(data) elif event_type == 'webrtcup': try: session_info = self.sip_sessions[handle_id] except KeyError: self.log.warning('could not find session for handle ID %s' % handle_id) return session_info.state = 'established' self.send(sylkrtc.SessionEstablishedEvent(session=session_info.id)) self.log.debug('{session.direction} session {session.id} state: {session.state}'.format(session=session_info)) self.log.info('established WEBRTC connection for session {session.id}'.format(session=session_info)) elif event_type == 'hangup': try: session_info = self.sip_sessions[handle_id] except KeyError: return if session_info.state != 'terminated': session_info.state = 'terminated' reason = event.get('reason', 'reason unspecified') self.send(sylkrtc.SessionTerminatedEvent(session=session_info.id, reason=reason)) self.log.info('{session.direction} session {session.id} terminated ({reason})'.format(session=session_info, reason=reason)) self._cleanup_session(session_info) elif event_type in ('media', 'detached'): # ignore pass elif event_type == 'slowlink': try: session_info = self.sip_sessions[handle_id] except KeyError: self.log.warning('could not find session for handle ID %s' % handle_id) return try: uplink = data['event']['uplink'] except KeyError: self.log.warning('could not find uplink in slowlink event data') return if uplink: # uplink is from janus' point of view if not session_info.slow_download: self.log.info('poor download connectivity for session {session.id}'.format(session=session_info)) session_info.slow_download = True else: if not session_info.slow_upload: self.log.info('poor upload connectivity for session {session.id}'.format(session=session_info)) session_info.slow_upload = True else: self.log.warning('received unexpected event type: %s' % event_type) def _janus_event_plugin_sip(self, data): handle_id = data['handle_id'] event = data['event'] plugin_data = event['plugindata'] assert plugin_data['plugin'] == 'janus.plugin.sip' event_data = plugin_data['data'] assert event_data.get('sip') == 'event' if 'result' not in event_data: self.log.warning('unexpected event: %s' % event) return event_data = event_data['result'] jsep = event.get('jsep', None) event_type = event_data['event'] # if event_type == 'registering': # account_info = self.account_handles_map.get(handle_id) # if account_info is None: # self.log.warning('could not find account for handle ID %s' % handle_id) # elif account_info.registration_state != event_type: # account_info.registration_state = event_type # self.send(sylkrtc.AccountRegisteringEvent(account=account_info.id)) if event_type == 'registering': try: account_info = self.account_handles_map[handle_id] except KeyError: self.log.warning('could not find account for handle ID %s' % handle_id) return if account_info.registration_state != event_type: account_info.registration_state = event_type self.send(sylkrtc.AccountRegisteringEvent(account=account_info.id)) elif event_type == 'registered': if event_data['register_sent'] in (False, 'false'): # skip 'registered' events from outgoing session handles return try: account_info = self.account_handles_map[handle_id] except KeyError: self.log.warning('could not find account for handle ID %s' % handle_id) return if account_info.registration_state != event_type: account_info.registration_state = event_type self.send(sylkrtc.AccountRegisteredEvent(account=account_info.id)) self.log.info('registered {account.id} to receive incoming calls'.format(account=account_info)) elif event_type == 'registration_failed': try: account_info = self.account_handles_map[handle_id] except KeyError: self.log.warning('could not find account for handle ID %s' % handle_id) return if account_info.registration_state != 'failed': account_info.registration_state = 'failed' reason = '{0[code]} {0[reason]}'.format(event_data) self.send(sylkrtc.AccountRegistrationFailedEvent(account=account_info.id, reason=reason)) self.log.info('registration for {account.id} failed: {reason}'.format(account=account_info, reason=reason)) elif event_type == 'incomingcall': try: account_info = self.account_handles_map[handle_id] except KeyError: self.log.warning('could not find account for handle ID %s' % handle_id) return jsep = event.get('jsep', None) assert jsep is not None originator = sylkrtc.SIPIdentity(uri=SIP_PREFIX_RE.sub('', event_data['username']), display_name=event_data.get('displayname', '').replace('"', '')) session = SIPSessionInfo(uuid.uuid4().hex) session.janus_handle_id = handle_id session.init_incoming(account_info.id, originator.uri, originator.display_name) self.sip_sessions.add(session) self.send(sylkrtc.AccountIncomingSessionEvent(account=account_info.id, session=session.id, originator=originator, sdp=jsep['sdp'])) self.log.info('received incoming session {session.id} from {session.remote_identity.uri!s} to {session.local_identity.uri!s}'.format(session=session)) elif event_type == 'missed_call': try: account_info = self.account_handles_map[handle_id] except KeyError: self.log.warning('could not find account for handle ID %s' % handle_id) return originator = sylkrtc.SIPIdentity(uri=SIP_PREFIX_RE.sub('', event_data['caller']), display_name=event_data.get('displayname', '').replace('"', '')) self.send(sylkrtc.AccountMissedSessionEvent(account=account_info.id, originator=originator)) self.log.info('missed incoming call from {originator.uri}'.format(originator=originator)) elif event_type == 'calling': try: session_info = self.sip_sessions[handle_id] except KeyError: self.log.warning('could not find session for handle ID %s' % handle_id) return session_info.state = 'progress' self.send(sylkrtc.SessionProgressEvent(session=session_info.id)) self.log.debug('{session.direction} session {session.id} state: {session.state}'.format(session=session_info)) elif event_type == 'accepted': try: session_info = self.sip_sessions[handle_id] except KeyError: self.log.warning('could not find session for handle ID %s' % handle_id) return session_info.state = 'accepted' event = sylkrtc.SessionAcceptedEvent(session=session_info.id) if session_info.direction == 'outgoing': assert jsep is not None event.sdp = jsep['sdp'] self.send(event) self.log.debug('{session.direction} session {session.id} state: {session.state}'.format(session=session_info)) elif event_type == 'hangup': try: session_info = self.sip_sessions[handle_id] except KeyError: return if session_info.state != 'terminated': session_info.state = 'terminated' code = event_data.get('code', 0) reason = '%d %s' % (code, event_data.get('reason', 'Unknown')) self.send(sylkrtc.SessionTerminatedEvent(session=session_info.id, reason=reason)) if session_info.direction == 'incoming' and code == 487: # incoming call was cancelled -> missed self.send(sylkrtc.AccountMissedSessionEvent(account=session_info.account_id, originator=session_info.remote_identity.__dict__)) if code >= 300: self.log.info('{session.direction} session {session.id} terminated ({reason})'.format(session=session_info, reason=reason)) else: self.log.info('{session.direction} session {session.id} terminated'.format(session=session_info)) self._cleanup_session(session_info) elif event_type in ('ack', 'declining', 'hangingup', 'proceeding'): pass # ignore else: self.log.warning('unexpected SIP plugin event type: %s' % event_type) def _EH_janus_event_videoroom(self, data): handle_id = data['handle_id'] event_type = data['event_type'] if event_type == 'event': self._janus_event_plugin_videoroom(data) elif event_type == 'webrtcup': try: videoroom_session = self.videoroom_sessions[handle_id] except KeyError: self.log.warning('could not find video room session for handle ID %s during webrtcup event' % handle_id) return if videoroom_session.type == 'publisher': self.log.info('established WEBRTC connection for session {session.id}'.format(session=videoroom_session)) self.send(sylkrtc.VideoroomSessionEstablishedEvent(session=videoroom_session.id)) else: self.send(sylkrtc.VideoroomFeedEstablishedEvent(session=videoroom_session.parent_session.id, feed=videoroom_session.id)) elif event_type == 'hangup': try: videoroom_session = self.videoroom_sessions[handle_id] except KeyError: return self._cleanup_videoroom_session(videoroom_session) elif event_type in ('media', 'detached'): pass elif event_type == 'slowlink': try: videoroom_session = self.videoroom_sessions[handle_id] except KeyError: self.log.warning('could not find video room session for handle ID %s during slowlink event' % handle_id) return try: uplink = data['event']['uplink'] except KeyError: self.log.error('could not find uplink in slowlink event data') return if uplink: # uplink is from janus' point of view if not videoroom_session.slow_download: self.log.info('poor download connectivity to video room {session.room.uri} with session {session.id}'.format(session=videoroom_session)) videoroom_session.slow_download = True else: if not videoroom_session.slow_upload: self.log.info('poor upload connectivity to video room {session.room.uri} with session {session.id}'.format(session=videoroom_session)) videoroom_session.slow_upload = True else: self.log.warning('received unexpected event type %s: data=%s' % (event_type, data)) def _janus_event_plugin_videoroom(self, data): handle_id = data['handle_id'] event = data['event'] plugin_data = event['plugindata'] assert(plugin_data['plugin'] == 'janus.plugin.videoroom') event_data = event['plugindata']['data'] assert 'videoroom' in event_data event_type = event_data['videoroom'] if event_type == 'joined': # a join request succeeded, this is a publisher try: videoroom_session = self.videoroom_sessions[handle_id] except KeyError: self.log.warning('could not find video room session for handle ID %s during joined event' % handle_id) return self.log.info('joined video room {session.room.uri} with session {session.id}'.format(session=videoroom_session)) videoroom_session.publisher_id = event_data['id'] room = videoroom_session.room jsep = event.get('jsep', None) assert jsep is not None self.send(sylkrtc.VideoroomSessionAcceptedEvent(session=videoroom_session.id, sdp=jsep['sdp'])) # send information about existing publishers publishers = [] for publisher in event_data['publishers']: publisher_id = publisher['id'] try: publisher_session = room[publisher_id] except KeyError: self.log.warning('could not find matching session for publisher %s during joined event' % publisher_id) else: publishers.append(dict(id=publisher_session.id, uri=publisher_session.account_id, display_name=publisher.get('display', ''))) self.send(sylkrtc.VideoroomInitialPublishersEvent(session=videoroom_session.id, publishers=publishers)) room.add(videoroom_session) # adding the session to the room might also trigger sending an event with the active participants which must be sent last elif event_type == 'event': if 'publishers' in event_data: try: videoroom_session = self.videoroom_sessions[handle_id] except KeyError: self.log.warning('could not find video room session for handle ID %s during publishers event' % handle_id) return room = videoroom_session.room # send information about new publishers publishers = [] for publisher in event_data['publishers']: publisher_id = publisher['id'] try: publisher_session = room[publisher_id] except KeyError: self.log.warning('could not find matching session for publisher %s during publishers event' % publisher_id) continue publishers.append(dict(id=publisher_session.id, uri=publisher_session.account_id, display_name=publisher.get('display', ''))) self.send(sylkrtc.VideoroomPublishersJoinedEvent(session=videoroom_session.id, publishers=publishers)) elif 'leaving' in event_data: janus_publisher_id = event_data['leaving'] # janus_publisher_id == 'ok' when the event is about ourselves leaving the room try: base_session = self.videoroom_sessions[handle_id] except KeyError: if janus_publisher_id != 'ok': self.log.warning('could not find video room session for handle ID %s during leaving event' % handle_id) return if janus_publisher_id == 'ok': self.log.info('left video room {session.room.uri} with session {session.id}'.format(session=base_session)) self._cleanup_videoroom_session(base_session) return try: publisher_session = base_session.feeds.pop(janus_publisher_id) except KeyError: return self.send(sylkrtc.VideoroomPublishersLeftEvent(session=base_session.id, publishers=[publisher_session.id])) elif {'started', 'unpublished', 'left', 'configured'}.intersection(event_data): pass else: self.log.warning('received unexpected video room plugin event: type={} data={}'.format(event_type, event_data)) elif event_type == 'attached': # sent when a feed is subscribed for a given publisher try: videoroom_session = self.videoroom_sessions[handle_id] except KeyError: self.log.warning('could not find video room session for handle ID %s during attached event' % handle_id) return # get the session which originated the subscription base_session = videoroom_session.parent_session jsep = event.get('jsep', None) assert base_session is not None assert jsep is not None assert jsep['type'] == 'offer' self.send(sylkrtc.VideoroomFeedAttachedEvent(session=base_session.id, feed=videoroom_session.id, sdp=jsep['sdp'])) elif event_type == 'slow_link': pass else: self.log.warning('received unexpected video room plugin event: type={} data={}'.format(event_type, event_data))