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diff --git a/sylk/applications/webrtcgateway/handler.py b/sylk/applications/webrtcgateway/handler.py
index 0ad3ab4..daebefb 100644
--- a/sylk/applications/webrtcgateway/handler.py
+++ b/sylk/applications/webrtcgateway/handler.py
@@ -1,1273 +1,1276 @@
import hashlib
import json
import random
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 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 typing import Generic, Container, Iterable, Sized, TypeVar, Dict, Set, Optional, Union
+from sylk.applications.webrtcgateway import push
from sylk.applications.webrtcgateway.configuration import GeneralConfig, get_room_config
from sylk.applications.webrtcgateway.janus import JanusBackend, JanusError, JanusSession, SIPPluginHandle, VideoroomPluginHandle
from sylk.applications.webrtcgateway.logger import ConnectionLogger, VideoroomLogger
from sylk.applications.webrtcgateway.models import sylkrtc, janus
from sylk.applications.webrtcgateway.storage import TokenStorage
class AccountInfo(object):
# noinspection PyShadowingBuiltins
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 = None # type: Optional[SIPPluginHandle]
@property
def uri(self):
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=None):
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()
# noinspection PyShadowingBuiltins
def __init__(self, id):
self.id = id
self.direction = None
self.state = None
self.account_id = None
self.local_identity = None # type: SessionPartyIdentity
self.remote_identity = None # type: SessionPartyIdentity
self.janus_handle = None # type: SIPPluginHandle
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 VideoroomSessionInfo(object):
slow_download = SlowLinkDescriptor()
slow_upload = SlowLinkDescriptor()
# noinspection PyShadowingBuiltins
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 = None # type: VideoroomPluginHandle
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
# noinspection PyShadowingBuiltins
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 '<{0.__class__.__name__}: type={0.type!r} id={0.id!r} janus_handle={0.janus_handle!r}>'.format(self)
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 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() # type: Set[VideoroomSessionInfo]
self._id_map = {} # type: Dict[Union[str, int], VideoroomSessionInfo] # 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
session.janus_handle.message(janus.VideoroomUpdatePublisher(bitrate=bitrate), async=True)
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
session.janus_handle.message(janus.VideoroomUpdatePublisher(bitrate=bitrate), async=True)
# 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
SessionT = TypeVar('SessionT', SIPSessionInfo, VideoroomSessionInfo)
class SessionContainer(Sized, Iterable[SessionT], Container[SessionT], Generic[SessionT]):
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()
# noinspection PyPep8Naming
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 = None # type: JanusSession
self.accounts_map = {} # account ID -> account
self.account_handles_map = {} # Janus handle ID -> account
self.sip_sessions = SessionContainer() # type: SessionContainer[SIPSessionInfo] # incoming and outgoing SIP sessions
self.videoroom_sessions = SessionContainer() # type: SessionContainer[VideoroomSessionInfo] # publisher and subscriber sessions in video rooms
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 = JanusSession()
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 is not None:
self.janus.set_event_handler(account_info.janus_handle.id, None)
for session in self.sip_sessions:
if session.janus_handle is not None:
self.janus.set_event_handler(session.janus_handle.id, None)
for session in self.videoroom_sessions:
if session.janus_handle is not None:
self.janus.set_event_handler(session.janus_handle.id, None)
session.room.discard(session)
session.feeds.clear()
self.janus_session.destroy() # this automatically detaches all plugin handles associated with it, no 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 = 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 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
session.janus_handle.detach()
def _cleanup_videoroom_session(self, session):
# should only be called from a green thread.
if self.janus_session 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()
session.janus_handle.detach()
self._maybe_destroy_videoroom(session.room)
else:
session.parent_session.feeds.discard(session.publisher_id)
session.janus_handle.detach()
def _maybe_destroy_videoroom(self, videoroom):
# should only be called from a green thread.
if self.protocol is None or self.janus_session 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)
with VideoroomPluginHandle(self.janus_session, event_handler=self._handle_janus_videoroom_event) as videoroom_handle:
videoroom_handle.destroy(room=videoroom.id)
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_sip_event(self, event):
operation = Operation(type='event', name='janus-sip', data=event)
self.operations_queue.send(operation)
def _handle_janus_videoroom_event(self, event):
operation = Operation(type='event', name='janus-videoroom', data=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
if account_info.janus_handle is not None:
account_info.janus_handle.detach()
self.account_handles_map.pop(account_info.janus_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)
if account_info.janus_handle is not None:
# Destroy the existing plugin handle
account_info.janus_handle.detach()
self.account_handles_map.pop(account_info.janus_handle.id)
account_info.janus_handle = None
# Create a plugin handle
account_info.janus_handle = SIPPluginHandle(self.janus_session, event_handler=self._handle_janus_sip_event)
self.account_handles_map[account_info.janus_handle.id] = account_info
account_info.janus_handle.register(account_info, proxy=proxy)
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))
if account_info.janus_handle is not None:
account_info.janus_handle.detach()
self.account_handles_map.pop(account_info.janus_handle.id)
account_info.janus_handle = None
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
janus_handle = SIPPluginHandle(self.janus_session, event_handler=self._handle_janus_sip_event)
try:
janus_handle.call(account_info, uri=request.uri, sdp=request.sdp, proxy=proxy)
except Exception:
janus_handle.detach()
raise
session_info = SIPSessionInfo(request.session)
session_info.janus_handle = janus_handle
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))
session_info.janus_handle.accept(sdp=request.sdp)
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))
session_info.janus_handle.trickle(request.candidates)
if not request.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':
session_info.janus_handle.decline()
else:
session_info.janus_handle.hangup()
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:
videoroom_handle = VideoroomPluginHandle(self.janus_session, event_handler=self._handle_janus_videoroom_event)
try:
try:
videoroom_handle.create(room=videoroom.id, config=videoroom.config, publishers=10)
except JanusError as e:
if e.code != 427: # 427 means room already exists
raise
videoroom_handle.join(room=videoroom.id, sdp=request.sdp, display_name=account_info.display_name)
except Exception:
videoroom_handle.detach()
raise
except Exception:
self._maybe_destroy_videoroom(videoroom)
raise
videoroom_session = VideoroomSessionInfo(request.session, owner=self)
videoroom_session.janus_handle = videoroom_handle
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))
videoroom_session.janus_handle.leave()
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))
try:
base_session = self.videoroom_sessions[request.session] # our 'base' session (the one used to join and publish)
except KeyError:
raise APIError('Unknown video room session: {request.session}'.format(request=request))
try:
publisher_session = base_session.room[request.publisher] # the publisher's session (the one we want to subscribe to)
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))
videoroom_handle = VideoroomPluginHandle(self.janus_session, event_handler=self._handle_janus_videoroom_event)
try:
videoroom_handle.feed_attach(room=base_session.room.id, feed=publisher_session.publisher_id)
except Exception:
videoroom_handle.detach()
raise
videoroom_session = VideoroomSessionInfo(request.feed, owner=self)
videoroom_session.janus_handle = videoroom_handle
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))
videoroom_session.janus_handle.feed_start(sdp=request.sdp)
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))
videoroom_session.janus_handle.feed_detach()
# safety net in case we do not get any answer for the feed_detach 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)
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)
+ for participant in participants:
+ push.conference_invite(originator=originator.uri, destination=participant, room=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))
videoroom_session.janus_handle.trickle(request.candidates)
if not request.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))
options = request.options.__data__
if options:
videoroom_session.janus_handle.update_publisher(options)
modified = ', '.join('{}={}'.format(key, options[key]) for key in options)
self.log.info('updated video room session {request.session} with {modified}'.format(request=request, modified=modified))
# Event handlers
def _EH_janus_sip(self, event):
if isinstance(event, janus.PluginEvent):
event_id = event.plugindata.data.__id__
try:
handler = getattr(self, '_EH_janus_' + '_'.join(event_id))
except AttributeError:
self.log.warning('unhandled Janus SIP event: {event_name}'.format(event_name=event_id[-1]))
else:
self.log.debug('janus SIP event: {event_name} (handle_id={event.sender})'.format(event=event, event_name=event_id[-1]))
handler(event)
else: # janus.CoreEvent
try:
handler = getattr(self, '_EH_janus_sip_' + event.janus)
except AttributeError:
self.log.warning('unhandled Janus SIP event: {event.janus}'.format(event=event))
else:
self.log.debug('janus SIP event: {event.janus} (handle_id={event.sender})'.format(event=event))
handler(event)
def _EH_janus_sip_error(self, event):
# fixme: implement error handling
self.log.error('got SIP error event: {}'.format(event.__data__))
handle_id = event.sender
if handle_id in self.sip_sessions:
pass # this is a session related event
elif handle_id in self.account_handles_map:
pass # this is an account related event
def _EH_janus_sip_webrtcup(self, event):
try:
session_info = self.sip_sessions[event.sender]
except KeyError:
self.log.warning('could not find SIP session with handle ID {event.sender} for webrtcup event'.format(event=event))
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))
def _EH_janus_sip_hangup(self, event):
try:
session_info = self.sip_sessions[event.sender]
except KeyError:
return
if session_info.state != 'terminated':
session_info.state = 'terminated'
reason = event.reason or 'unspecified reason'
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)
def _EH_janus_sip_slowlink(self, event):
try:
session_info = self.sip_sessions[event.sender]
except KeyError:
self.log.warning('could not find SIP session with handle ID {event.sender} for slowlink event'.format(event=event))
return
if event.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
def _EH_janus_sip_media(self, event):
pass
def _EH_janus_sip_detached(self, event):
pass
def _EH_janus_sip_event_registering(self, event):
try:
account_info = self.account_handles_map[event.sender]
except KeyError:
self.log.warning('could not find account with handle ID {event.sender} for registering event'.format(event=event))
return
if account_info.registration_state != 'registering':
account_info.registration_state = 'registering'
self.send(sylkrtc.AccountRegisteringEvent(account=account_info.id))
def _EH_janus_sip_event_registered(self, event):
if event.sender in self.sip_sessions: # skip 'registered' events from outgoing session handles
return
try:
account_info = self.account_handles_map[event.sender]
except KeyError:
self.log.warning('could not find account with handle ID {event.sender} for registered event'.format(event=event))
return
if account_info.registration_state != 'registered':
account_info.registration_state = 'registered'
self.send(sylkrtc.AccountRegisteredEvent(account=account_info.id))
self.log.info('registered {account.id} to receive incoming calls'.format(account=account_info))
def _EH_janus_sip_event_registration_failed(self, event):
try:
account_info = self.account_handles_map[event.sender]
except KeyError:
self.log.warning('could not find account with handle ID {event.sender} for registration failed event'.format(event=event))
return
if account_info.registration_state != 'failed':
account_info.registration_state = 'failed'
reason = '{result.code} {result.reason}'.format(result=event.plugindata.data.result)
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))
def _EH_janus_sip_event_incomingcall(self, event):
try:
account_info = self.account_handles_map[event.sender]
except KeyError:
self.log.warning('could not find account with handle ID {event.sender} for incoming call event'.format(event=event))
return
assert event.jsep is not None
data = event.plugindata.data.result # type: janus.SIPResultIncomingCall
originator = sylkrtc.SIPIdentity(uri=data.username, display_name=data.displayname)
session = SIPSessionInfo(uuid.uuid4().hex)
session.janus_handle = account_info.janus_handle
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=event.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))
def _EH_janus_sip_event_missed_call(self, event):
try:
account_info = self.account_handles_map[event.sender]
except KeyError:
self.log.warning('could not find account with handle ID {event.sender} for missed call event'.format(event=event))
return
data = event.plugindata.data.result # type: janus.SIPResultMissedCall
originator = sylkrtc.SIPIdentity(uri=data.caller, display_name=data.displayname)
self.send(sylkrtc.AccountMissedSessionEvent(account=account_info.id, originator=originator))
self.log.info('missed incoming call from {originator.uri}'.format(originator=originator))
def _EH_janus_sip_event_calling(self, event):
try:
session_info = self.sip_sessions[event.sender]
except KeyError:
self.log.warning('could not find SIP session with handle ID {event.sender} for calling event'.format(event=event))
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))
def _EH_janus_sip_event_accepted(self, event):
try:
session_info = self.sip_sessions[event.sender]
except KeyError:
self.log.warning('could not find SIP session with handle ID {event.sender} for accepted event'.format(event=event))
return
session_info.state = 'accepted'
if session_info.direction == 'outgoing':
assert event.jsep is not None
self.send(sylkrtc.SessionAcceptedEvent(session=session_info.id, sdp=event.jsep.sdp))
else:
self.send(sylkrtc.SessionAcceptedEvent(session=session_info.id))
self.log.debug('{session.direction} session {session.id} state: {session.state}'.format(session=session_info))
def _EH_janus_sip_event_hangup(self, event):
try:
session_info = self.sip_sessions[event.sender]
except KeyError:
self.log.warning('could not find SIP session with handle ID {event.sender} for hangup event'.format(event=event))
return
if session_info.state != 'terminated':
session_info.state = 'terminated'
data = event.plugindata.data.result # type: janus.SIPResultHangup
reason = '{0.code} {0.reason}'.format(data)
self.send(sylkrtc.SessionTerminatedEvent(session=session_info.id, reason=reason))
if session_info.direction == 'incoming' and data.code == 487: # incoming call was cancelled -> missed
self.send(sylkrtc.AccountMissedSessionEvent(account=session_info.account_id, originator=session_info.remote_identity.__dict__))
if data.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)
def _EH_janus_sip_event_declining(self, event):
pass
def _EH_janus_sip_event_hangingup(self, event):
pass
def _EH_janus_sip_event_proceeding(self, event):
pass
def _EH_janus_videoroom(self, event):
if isinstance(event, janus.PluginEvent):
event_id = event.plugindata.data.__id__
try:
handler = getattr(self, '_EH_janus_' + '_'.join(event_id))
except AttributeError:
self.log.warning('unhandled Janus videoroom event: {event_name}'.format(event_name=event_id[-1]))
else:
self.log.debug('janus videoroom event: {event_name} (handle_id={event.sender})'.format(event=event, event_name=event_id[-1]))
handler(event)
else: # janus.CoreEvent
try:
handler = getattr(self, '_EH_janus_videoroom_' + event.janus)
except AttributeError:
self.log.warning('unhandled Janus videoroom event: {event.janus}'.format(event=event))
else:
self.log.debug('janus videoroom event: {event.janus} (handle_id={event.sender})'.format(event=event))
handler(event)
def _EH_janus_videoroom_error(self, event):
# fixme: implement error handling
self.log.error('got videoroom error event: {}'.format(event.__data__))
try:
videoroom_session = self.videoroom_sessions[event.sender]
except KeyError:
self.log.warning('could not find video room session with handle ID {event.sender} for error event'.format(event=event))
return
if videoroom_session.type == 'publisher':
pass
else:
pass
def _EH_janus_videoroom_webrtcup(self, event):
try:
videoroom_session = self.videoroom_sessions[event.sender]
except KeyError:
self.log.warning('could not find video room session with handle ID {event.sender} for webrtcup event'.format(event=event))
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))
def _EH_janus_videoroom_hangup(self, event):
try:
videoroom_session = self.videoroom_sessions[event.sender]
except KeyError:
return
self._cleanup_videoroom_session(videoroom_session)
def _EH_janus_videoroom_slowlink(self, event):
try:
videoroom_session = self.videoroom_sessions[event.sender]
except KeyError:
self.log.warning('could not find video room session with handle ID {event.sender} for slowlink event'.format(event=event))
return
if event.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
def _EH_janus_videoroom_media(self, event):
pass
def _EH_janus_videoroom_detached(self, event):
pass
def _EH_janus_videoroom_joined(self, event):
# send when a publisher successfully joined a room
try:
videoroom_session = self.videoroom_sessions[event.sender]
except KeyError:
self.log.warning('could not find video room session with handle ID {event.sender} for joined event'.format(event=event))
return
self.log.info('joined video room {session.room.uri} with session {session.id}'.format(session=videoroom_session))
data = event.plugindata.data # type: janus.VideoroomJoined
videoroom_session.publisher_id = data.id
room = videoroom_session.room
assert event.jsep is not None
self.send(sylkrtc.VideoroomSessionAcceptedEvent(session=videoroom_session.id, sdp=event.jsep.sdp))
# send information about existing publishers
publishers = []
for publisher in data.publishers: # type: janus.VideoroomPublisher
try:
publisher_session = room[publisher.id]
except KeyError:
self.log.warning('could not find matching session for publisher {publisher.id} during joined event'.format(publisher=publisher))
else:
publishers.append(dict(id=publisher_session.id, uri=publisher_session.account_id, display_name=publisher.display or ''))
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
def _EH_janus_videoroom_attached(self, event):
# sent when a feed is subscribed for a given publisher
try:
videoroom_session = self.videoroom_sessions[event.sender]
except KeyError:
self.log.warning('could not find video room session with handle ID {event.sender} for attached event'.format(event=event))
return
# get the session which originated the subscription
base_session = videoroom_session.parent_session
assert base_session is not None
assert event.jsep is not None and event.jsep.type == 'offer'
self.send(sylkrtc.VideoroomFeedAttachedEvent(session=base_session.id, feed=videoroom_session.id, sdp=event.jsep.sdp))
def _EH_janus_videoroom_slow_link(self, event):
pass
def _EH_janus_videoroom_event_publishers(self, event):
try:
videoroom_session = self.videoroom_sessions[event.sender]
except KeyError:
self.log.warning('could not find video room session with handle ID {event.sender} for publishers event'.format(event=event))
return
room = videoroom_session.room
# send information about new publishers
publishers = []
for publisher in event.plugindata.data.publishers: # type: janus.VideoroomPublisher
try:
publisher_session = room[publisher.id]
except KeyError:
self.log.warning('could not find matching session for publisher {publisher.id} during publishers event'.format(publisher=publisher))
continue
publishers.append(dict(id=publisher_session.id, uri=publisher_session.account_id, display_name=publisher.display or ''))
self.send(sylkrtc.VideoroomPublishersJoinedEvent(session=videoroom_session.id, publishers=publishers))
def _EH_janus_videoroom_event_leaving(self, event):
# this is a publisher
publisher_id = event.plugindata.data.leaving # publisher_id == 'ok' when the event is about ourselves leaving the room, else the publisher's janus ID
try:
base_session = self.videoroom_sessions[event.sender]
except KeyError:
if publisher_id != 'ok':
self.log.warning('could not find video room session with handle ID {event.sender} for leaving event'.format(event=event))
return
if 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(publisher_id)
except KeyError:
return
self.send(sylkrtc.VideoroomPublishersLeftEvent(session=base_session.id, publishers=[publisher_session.id]))
def _EH_janus_videoroom_event_left(self, event):
# this is a subscriber
try:
videoroom_session = self.videoroom_sessions[event.sender]
except KeyError:
pass
else:
self._cleanup_videoroom_session(videoroom_session)
def _EH_janus_videoroom_event_configured(self, event):
pass
def _EH_janus_videoroom_event_started(self, event):
pass
def _EH_janus_videoroom_event_unpublished(self, event):
pass

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