import asyncio import logging from cachetools import LRUCache from uuid import uuid4 from .misc import Message cache = LRUCache(1024) def person_check(actor, software): ## pleroma and akkoma use Person for the actor type for some reason if software in {'akkoma', 'pleroma'} and actor.id != f'https://{actor.domain}/relay': return True ## make sure the actor is an application elif actor.type != 'Application': return True async def handle_relay(request): if request.message.objectid in cache: logging.verbose(f'already relayed {request.message.objectid}') return message = Message.new_announce( host = request.config.host, object = request.message.objectid ) cache[request.message.objectid] = message.id logging.debug(f'>> relay: {message}') inboxes = request.database.distill_inboxes(request.message) for inbox in inboxes: request.app.push_message(inbox, message) async def handle_forward(request): if request.message.id in cache: logging.verbose(f'already forwarded {request.message.id}') return message = Message.new_announce( host = request.config.host, object = request.message ) cache[request.message.id] = message.id logging.debug(f'>> forward: {message}') inboxes = request.database.distill_inboxes(request.message) for inbox in inboxes: request.app.push_message(inbox, message) async def handle_follow(request): nodeinfo = await request.app.client.fetch_nodeinfo(request.actor.domain) software = nodeinfo.sw_name if nodeinfo else None ## reject if software used by actor is banned if request.config.is_banned_software(software): request.app.push_message( request.actor.shared_inbox, Message.new_response( host = request.config.host, actor = request.actor.id, followid = request.message.id, accept = False ) ) return logging.verbose(f'Rejected follow from actor for using specific software: actor={request.actor.id}, software={software}') ## reject if the actor is not an instance actor if person_check(request.actor, software): request.app.push_message( request.actor.shared_inbox, Message.new_response( host = request.config.host, actor = request.actor.id, followid = request.message.id, accept = False ) ) return logging.verbose(f'Non-application actor tried to follow: {request.actor.id}') request.database.add_inbox(request.actor.shared_inbox, request.message.id, software) request.database.save() request.app.push_message( request.actor.shared_inbox, Message.new_response( host = request.config.host, actor = request.actor.id, followid = request.message.id, accept = True ) ) # Are Akkoma and Pleroma the only two that expect a follow back? # Ignoring only Mastodon for now if software != 'mastodon': request.app.push_message( request.actor.shared_inbox, Message.new_follow( host = request.config.host, actor = request.actor.id ) ) async def handle_undo(request): ## If the object is not a Follow, forward it if request.message.object.type != 'Follow': return await handle_forward(request) if not request.database.del_inbox(request.actor.domain, request.message.id): return request.database.save() request.app.push_message( request.actor.shared_inbox, Message.new_unfollow( host = request.config.host, actor = request.actor.id, follow = request.message ) ) processors = { 'Announce': handle_relay, 'Create': handle_relay, 'Delete': handle_forward, 'Follow': handle_follow, 'Undo': handle_undo, 'Update': handle_forward, } async def run_processor(request): if request.message.type not in processors: return if request.instance and not request.instance.get('software'): nodeinfo = await request.app.client.fetch_nodeinfo(request.instance['domain']) if nodeinfo: request.instance['software'] = nodeinfo.sw_name request.database.save() logging.verbose(f'New "{request.message.type}" from actor: {request.actor.id}') return await processors[request.message.type](request)