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