diff --git a/sylk/applications/webrtcgateway/__init__.py b/sylk/applications/webrtcgateway/__init__.py index 3e85373..414248a 100644 --- a/sylk/applications/webrtcgateway/__init__.py +++ b/sylk/applications/webrtcgateway/__init__.py @@ -1,433 +1,433 @@ import json import random import secrets import uuid from application.notification import IObserver, NotificationCenter, NotificationData from application.python import Null from sipsimple.configuration.settings import SIPSimpleSettings from sipsimple.core import SIPURI, FromHeader, ToHeader, Message, RouteHeader, Header from sipsimple.lookup import DNSLookup, DNSLookupError from sipsimple.payloads.imdn import IMDNDocument from sipsimple.streams.msrp.chat import CPIMPayload, CPIMParserError, Message as SIPMessage from sipsimple.threading.green import run_in_green_thread from sipsimple.util import ISOTimestamp from twisted.internet import defer from zope.interface import implementer from sylk.applications import SylkApplication from sylk.configuration import SIPConfig from sylk.web import server from .configuration import GeneralConfig from .logger import log from .models import sylkrtc from .storage import TokenStorage, MessageStorage from .web import WebHandler, AdminWebHandler from . import push @implementer(IObserver) class WebRTCGatewayApplication(SylkApplication): def __init__(self): self.web_handler = WebHandler() self.admin_web_handler = AdminWebHandler() self.resolver = DNSLookup() def start(self): self.web_handler.start() self.admin_web_handler.start() # Load tokens from the storage token_storage = TokenStorage() token_storage.load() # Setup message storage message_storage = MessageStorage() message_storage.load() def stop(self): self.web_handler.stop() self.admin_web_handler.stop() def handle_notification(self, notification): handler = getattr(self, '_NH_%s' % notification.name, Null) handler(notification) def incoming_session(self, session): log.debug('New incoming session {session.call_id} from sip:{uri.user}@{uri.host} rejected'.format(session=session, uri=session.remote_identity.uri)) session.reject(403) def incoming_subscription(self, request, data): request.reject(405) def incoming_referral(self, request, data): request.reject(405) def incoming_message(self, message_request, data): content_type = data.headers.get('Content-Type', Null).content_type from_header = data.headers.get('From', Null) to_header = data.headers.get('To', Null) if Null in (content_type, from_header, to_header): message_request.answer(400) return if content_type == 'message/cpim': try: cpim_message = CPIMPayload.decode(data.body) except CPIMParserError: log.warning('SIP message from %s to %s rejected: CPIM parse error' % (from_header.uri, '%s@%s' % (to_header.uri.user, to_header.uri.host))) message_request.answer(400) return else: content_type = cpim_message.content_type log.info('received SIP message (%s) from %s to %s' % (content_type, from_header.uri, '%s@%s' % (to_header.uri.user, to_header.uri.host))) message_request.answer(200) message_handler = MessageHandler() message_handler.incoming_message(data) class ParsedSIPMessage(SIPMessage): __slots__ = 'message_id', 'disposition', 'destination' def __init__(self, content, content_type, sender=None, recipients=None, courtesy_recipients=None, subject=None, timestamp=None, required=None, additional_headers=None, message_id=None, disposition=None, destination=None): super(ParsedSIPMessage, self).__init__(content, content_type, sender, recipients, courtesy_recipients, subject, timestamp, required, additional_headers) self.message_id = message_id self.disposition = disposition self.destination = destination @implementer(IObserver) class MessageHandler(object): def __init__(self): self.message_storage = MessageStorage() self.from_header = None self.to_header = None self.content_type = None self.from_sip = None self.body = None self.parsed_message = None def _lookup_sip_target_route(self, uri): 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]) log.debug('DNS lookup for SIP message proxy for {} yielded {}'.format(uri, route)) return route def _parse_message(self): cpim_message = None if self.content_type == "message/cpim": cpim_message = CPIMPayload.decode(self.body) body = cpim_message.content if isinstance(cpim_message.content, str) else cpim_message.content.decode() content_type = cpim_message.content_type sender = cpim_message.sender or self.from_header disposition = next(([item.strip() for item in header.value.split(',')] for header in cpim_message.additional_headers if header.name == 'Disposition-Notification'), None) message_id = next((header.value for header in cpim_message.additional_headers if header.name == 'Message-ID'), str(uuid.uuid4())) else: body = self.body.decode('utf-8') sender = self.from_header disposition = None message_id = str(uuid.uuid4()) content_type = str(self.content_type) timestamp = str(cpim_message.timestamp) if cpim_message is not None and cpim_message.timestamp is not None else str(ISOTimestamp.now()) sender = sylkrtc.SIPIdentity(uri=str(sender.uri), display_name=sender.display_name) destination = sylkrtc.SIPIdentity(uri=str(self.to_header.uri), display_name=self.to_header.display_name) self.parsed_message = ParsedSIPMessage(body, content_type, sender=sender, disposition=disposition, message_id=message_id, timestamp=timestamp, destination=destination) def _send_public_key(self, from_header, to_header, public_key): if public_key: self.outgoing_message(from_header, public_key, 'text/pgp-public-key', str(to_header)) def _handle_generate_token(self): account = f'{self.from_header.uri.user}@{self.from_header.uri.host}' log.info(f'Adding {account} for storing messages') self.message_storage.add_account(account) token = secrets.token_urlsafe() self.outgoing_message(self.from_header.uri, json.dumps({'token': token, 'url': f'{server.url}/webrtcgateway/messages/history/{account}'}), 'application/sylk-api-token') self.message_storage.add_account_token(account=account, token=token) def _handle_lookup_pgp_key(self): account = f'{self.to_header.uri.user}@{self.to_header.uri.host}' public_key = self.message_storage.get_public_key(account) log.info(f'Public key lookup for {account}') if isinstance(public_key, defer.Deferred): public_key.addCallback(lambda result: self._send_public_key(self.from_header.uri, self.to_header.uri, result)) else: self._send_public_key(self.from_header.uri, self.to_header.uri, public_key) def _handle_message_remove(self): account = f'{self.from_header.uri.user}@{self.from_header.uri.host}' contact = f'{self.to_header.uri.user}@{self.to_header.uri.host}' message_id = self.parsed_message.content self.message_storage.removeMessage(account=account, message_id=message_id) content = sylkrtc.AccountMessageRemoveEventData(contact=contact, message_id=message_id) self.message_storage.add(account=account, contact=contact, direction='', content=json.dumps(content.__data__), content_type='application/sylk-message-remove', timestamp=str(ISOTimestamp.now()), disposition_notification='', message_id=str(uuid.uuid4())) event = sylkrtc.AccountSyncEvent(account=account, type='message', action='remove', content=content) self.outgoing_message(self.from_header.uri, json.dumps(content.__data__), 'application/sylk-message-remove', str(self.to_header.uri)) notification_center = NotificationCenter() notification_center.post_notification(name='SIPApplicationGotAccountRemoveMessage', sender=account, data=event) def remove_message_from_receiver(msg_id, messages): for message in messages: if message.message_id == msg_id and message.direction == 'incoming': account = message.account message_id = message.message_id self.message_storage.removeMessage(account=account, message_id=message_id) content = sylkrtc.AccountMessageRemoveEventData(contact=message.contact, message_id=message_id) self.message_storage.add(account=account, contact=message.contact, direction='', content=json.dumps(content.__data__), content_type='application/sylk-message-remove', timestamp=str(ISOTimestamp.now()), disposition_notification='', message_id=str(uuid.uuid4())) event = sylkrtc.AccountSyncEvent(account=account, type='message', action='remove', content=content) notification_center.post_notification(name='SIPApplicationGotAccountRemoveMessage', sender=account, data=event) log.info("Removed receiver message") break messages = self.message_storage[[contact, '']] if isinstance(messages, defer.Deferred): messages.addCallback(lambda result: remove_message_from_receiver(msg_id=message_id, messages=result)) else: remove_message_from_receiver(msg_id=message_id, messages=messages) def _store_message_for_sender(self, account): if account is None: log.info('not storing %s message from non-existent account %s to %s' % (self.parsed_message.content_type, self.from_header.uri, '%s@%s' % (self.to_header.uri.user, self.to_header.uri.host))) return log.debug(f"storage is enabled for originator {account.account}") message = None ignored_content_types = ("application/im-iscomposing+xml", 'text/pgp-public-key', IMDNDocument.content_type) if self.parsed_message.content_type in ignored_content_types: return log.info('storing {content_type} message for account {originator} to {destination.uri}'.format(content_type=self.parsed_message.content_type, originator=account.account, destination=self.parsed_message.destination)) self.message_storage.add(account=account.account, contact=f'{self.to_header.uri.user}@{self.to_header.uri.host}', direction="outgoing", content=self.parsed_message.content, content_type=self.parsed_message.content_type, timestamp=str(self.parsed_message.timestamp), disposition_notification=self.parsed_message.disposition, message_id=self.parsed_message.message_id, state='accepted') message = sylkrtc.AccountSyncEvent(account=account.account, type='message', action='add', content=sylkrtc.AccountMessageRequest( transaction='1', account=account.account, uri=f'{self.to_header.uri.user}@{self.to_header.uri.host}', message_id=self.parsed_message.message_id, content=self.parsed_message.content, content_type=self.parsed_message.content_type, timestamp=str(self.parsed_message.timestamp) )) notification_center = NotificationCenter() notification_center.post_notification(name='SIPApplicationGotOutgoingAccountMessage', sender=account.account, data=message) def _store_message_for_receiver(self, account): if account is None: log.info('not storing %s message from %s to non-existent account %s' % (self.parsed_message.content_type, self.from_header.uri, '%s@%s' % (self.to_header.uri.user, self.to_header.uri.host))) return log.debug(f'processing message from {self.from_header.uri} for account {account.account}') message = None notification_center = NotificationCenter() if self.parsed_message.content_type == "application/im-iscomposing+xml": return if self.parsed_message.content_type == IMDNDocument.content_type: document = IMDNDocument.parse(self.parsed_message.content) imdn_message_id = document.message_id.value imdn_status = document.notification.status.__str__() imdn_datetime = document.datetime.__str__() log.info('storing IMDN message ({status}) from {originator.uri}'.format(status=imdn_status, originator=self.parsed_message.sender)) self.message_storage.update(account=account.account, state=imdn_status, message_id=imdn_message_id) self.message_storage.update(account=str(self.parsed_message.sender.uri), state=imdn_status, message_id=imdn_message_id) message = sylkrtc.AccountDispositionNotificationEvent(account=account.account, state=imdn_status, message_id=imdn_message_id, message_timestamp=imdn_datetime, timestamp=str(self.parsed_message.timestamp), code=200, reason='') imdn_message_event = message.__data__ # del imdn_message_event['account'] ## Maybe prevent multiple imdn rows? self.message_storage.add(account=account.account, contact=self.parsed_message.sender.uri, direction="incoming", content=json.dumps(imdn_message_event), content_type='message/imdn', timestamp=str(self.parsed_message.timestamp), disposition_notification='', message_id=self.parsed_message.message_id, state='received') notification_center.post_notification(name='SIPApplicationGotAccountDispositionNotification', sender=account.account, data=NotificationData(message=message, sender=self.parsed_message.sender)) else: log.info('storing {content_type} message from {originator.uri} for account {account}'.format(content_type=self.parsed_message.content_type, originator=self.parsed_message.sender, account=account.account)) self.message_storage.add(account=account.account, contact=str(self.parsed_message.sender.uri), direction='incoming', content=self.parsed_message.content, content_type=self.parsed_message.content_type, timestamp=str(self.parsed_message.timestamp), disposition_notification=self.parsed_message.disposition, message_id=self.parsed_message.message_id, state='received') message = sylkrtc.AccountMessageEvent(account=account.account, sender=self.parsed_message.sender, content=self.parsed_message.content, content_type=self.parsed_message.content_type, timestamp=str(self.parsed_message.timestamp), disposition_notification=self.parsed_message.disposition, message_id=self.parsed_message.message_id) notification_center.post_notification(name='SIPApplicationGotAccountMessage', sender=account.account, data=message) if self.parsed_message.content_type == 'text/plain' or self.parsed_message.content_type == 'text/html': def get_unread_messages(messages, originator): unread = 1 for message in messages: if ((message.content_type == 'text/plain' or message.content_type == 'text/html') and message.direction == 'incoming' and message.contact != account.account and 'display' in message.disposition): unread += 1 # log.info(f'{message.disposition} {message.contact} {message.state}') # log.info(f'there are {unread} messages') push.message(originator=originator, destination=account.account, call_id=str(uuid.uuid4()), badge=unread) messages = self.message_storage[[account.account, '']] if isinstance(messages, defer.Deferred): messages.addCallback(lambda result: get_unread_messages(messages=result, originator=message.sender)) else: get_unread_messages(messages=messages, originator=message.sender) def incoming_message(self, data, content_type=None): self.content_type = content_type if content_type is not None else data.headers.get('Content-Type', Null).content_type self.from_header = data.headers.get('From', Null) self.to_header = data.headers.get('To', Null) self.body = data.body self.from_sip = data.headers.get('X-Sylk-From-Sip', Null) self._parse_message() if self.parsed_message.content_type == 'application/sylk-api-token': self._handle_generate_token() return if self.parsed_message.content_type == 'application/sylk-api-pgp-key-lookup': self._handle_lookup_pgp_key() return if self.parsed_message.content_type == 'application/sylk-api-message-remove': self._handle_message_remove() return if self.from_sip is not Null: log.debug("message is originating from SIP endpoint") sender_account = self.message_storage.get_account(f'{self.from_header.uri.user}@{self.from_header.uri.host}') if isinstance(sender_account, defer.Deferred): sender_account.addCallback(lambda result: self._store_message_for_sender(result)) else: self._store_message_for_sender(sender_account) account = self.message_storage.get_account(f'{self.to_header.uri.user}@{self.to_header.uri.host}') if isinstance(account, defer.Deferred): account.addCallback(lambda result: self._store_message_for_receiver(result)) else: self._store_message_for_receiver(account) @run_in_green_thread def outgoing_message(self, uri, content, content_type='text/plain', identity=None, extra_headers=[]): route = self._lookup_sip_target_route(uri) sip_uri = SIPURI.parse('%s' % uri) if route: if identity is None: identity = f'sip:sylkserver@{SIPConfig.local_ip}' log.info("sending message from '%s' to '%s' using proxy %s" % (identity, uri, route)) from_uri = SIPURI.parse(identity) content = content if isinstance(content, bytes) else content.encode() headers = [Header('X-Sylk-To-Sip', 'yes')] + extra_headers message_request = Message(FromHeader(from_uri), ToHeader(sip_uri), RouteHeader(route.uri), content_type, content, extra_headers=headers) notification_center = NotificationCenter() notification_center.add_observer(self, sender=message_request) message_request.send() def handle_notification(self, notification): handler = getattr(self, '_NH_%s' % notification.name, Null) handler(notification) def _NH_SIPMessageDidSucceed(self, notification): notification_center = NotificationCenter() notification_center.remove_observer(self, sender=notification.sender) log.info('outgoing message was accepted by remote party') def _NH_SIPMessageDidFail(self, notification): notification_center = NotificationCenter() notification_center.remove_observer(self, sender=notification.sender) data = notification.data reason = data.reason.decode() if isinstance(data.reason, bytes) else data.reason - log.warning('could not deliver message %d %s' % (data.code, reason)) + log.warning('could not deliver outgoing message %d %s' % (data.code, reason))