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pyfedi/app/activitypub/routes.py

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from datetime import timedelta
from random import randint
from flask import request, current_app, abort, jsonify, json, g, url_for, redirect, make_response
from flask_login import current_user
from sqlalchemy import desc, or_
import werkzeug.exceptions
from app import db, constants, cache, celery
from app.activitypub import bp
from app.activitypub.signature import HttpSignature, post_request, VerificationError, default_context, LDSignature
from app.community.routes import show_community
from app.community.util import send_to_remote_instance
from app.post.routes import continue_discussion, show_post
from app.user.routes import show_profile
from app.constants import *
from app.models import User, Community, CommunityJoinRequest, CommunityMember, CommunityBan, ActivityPubLog, Post, \
PostReply, Instance, PostVote, PostReplyVote, File, AllowedInstances, BannedInstances, utcnow, Site, Notification, \
ChatMessage, Conversation, UserFollower, UserBlock, Poll, PollChoice
from app.activitypub.util import public_key, users_total, active_half_year, active_month, local_posts, local_comments, \
post_to_activity, find_actor_or_create, find_reply_parent, find_liked_object, \
lemmy_site_data, is_activitypub_request, delete_post_or_comment, community_members, \
user_removed_from_remote_server, create_post, create_post_reply, update_post_reply_from_activity, \
update_post_from_activity, undo_vote, undo_downvote, post_to_page, get_redis_connection, find_reported_object, \
process_report, ensure_domains_match, can_edit, can_delete, resolve_remote_post, \
inform_followers_of_post_update, comment_model_to_json, restore_post_or_comment, ban_user, unban_user, \
log_incoming_ap, find_community, site_ban_remove_data, community_ban_remove_data, verify_object_from_source
from app.utils import gibberish, get_setting, render_template, \
community_membership, ap_datetime, ip_address, can_downvote, \
can_upvote, can_create_post, awaken_dormant_instance, shorten_string, can_create_post_reply, sha256_digest, \
community_moderators, html_to_text, add_to_modlog_activitypub, instance_banned
@bp.route('/testredis')
def testredis_get():
redis_client = get_redis_connection()
redis_client.set("cowbell", "1", ex=600)
x = redis_client.get('cowbell')
if x is not None:
return "Redis: OK"
else:
return "Redis: FAIL"
@bp.route('/.well-known/webfinger')
def webfinger():
if request.args.get('resource'):
query = request.args.get('resource') # acct:alice@tada.club
if 'acct:' in query:
actor = query.split(':')[1].split('@')[0] # alice
elif 'https:' in query or 'http:' in query:
actor = query.split('/')[-1]
else:
return 'Webfinger regex failed to match'
# special case: instance actor
if actor == current_app.config['SERVER_NAME']:
webfinger_data = {
"subject": f"acct:{actor}@{current_app.config['SERVER_NAME']}",
"aliases": [f"https://{current_app.config['SERVER_NAME']}/actor"],
"links": [
{
"rel": "http://webfinger.net/rel/profile-page",
"type": "text/html",
"href": f"https://{current_app.config['SERVER_NAME']}/about"
},
{
"rel": "self",
"type": "application/activity+json",
"href": f"https://{current_app.config['SERVER_NAME']}/actor",
}
]
}
resp = jsonify(webfinger_data)
resp.headers.add_header('Access-Control-Allow-Origin', '*')
return resp
seperator = 'u'
type = 'Person'
user = User.query.filter(or_(User.user_name == actor.strip(), User.alt_user_name == actor.strip())).filter_by(deleted=False, banned=False, ap_id=None).first()
if user is None:
community = Community.query.filter_by(name=actor.strip(), ap_id=None).first()
if community is None:
return ''
seperator = 'c'
type = 'Group'
webfinger_data = {
"subject": f"acct:{actor}@{current_app.config['SERVER_NAME']}",
"aliases": [f"https://{current_app.config['SERVER_NAME']}/{seperator}/{actor}"],
"links": [
{
"rel": "http://webfinger.net/rel/profile-page",
"type": "text/html",
"href": f"https://{current_app.config['SERVER_NAME']}/{seperator}/{actor}"
},
{
"rel": "self",
"type": "application/activity+json",
"href": f"https://{current_app.config['SERVER_NAME']}/{seperator}/{actor}",
"properties": {
"https://www.w3.org/ns/activitystreams#type": type
}
}
]
}
resp = jsonify(webfinger_data)
resp.headers.add_header('Access-Control-Allow-Origin', '*')
return resp
else:
abort(404)
@bp.route('/.well-known/nodeinfo')
@cache.cached(timeout=600)
def nodeinfo():
nodeinfo_data = {"links": [{"rel": "http://nodeinfo.diaspora.software/ns/schema/2.0",
"href": f"https://{current_app.config['SERVER_NAME']}/nodeinfo/2.0"},
{"rel": "https://www.w3.org/ns/activitystreams#Application",
"href": f"https://{current_app.config['SERVER_NAME']}"}]}
return jsonify(nodeinfo_data)
@bp.route('/.well-known/host-meta')
@cache.cached(timeout=600)
def host_meta():
resp = make_response('<?xml version="1.0" encoding="UTF-8"?>\n<XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">\n<Link rel="lrdd" template="https://' + current_app.config["SERVER_NAME"] + '/.well-known/webfinger?resource={uri}"/>\n</XRD>')
resp.content_type = 'application/xrd+xml; charset=utf-8'
return resp
@bp.route('/nodeinfo/2.0')
@bp.route('/nodeinfo/2.0.json')
@cache.cached(timeout=600)
def nodeinfo2():
nodeinfo_data = {
"version": "2.0",
"software": {
"name": "PieFed",
"version": "0.1"
},
"protocols": [
"activitypub"
],
"usage": {
"users": {
"total": users_total(),
"activeHalfyear": active_half_year(),
"activeMonth": active_month()
},
"localPosts": local_posts(),
"localComments": local_comments()
},
"openRegistrations": g.site.registration_mode != 'Closed'
}
return jsonify(nodeinfo_data)
@bp.route('/api/v1/instance')
@cache.cached(timeout=600)
def api_v1_instance():
retval = {
'title': g.site.name,
'uri': current_app.config['SERVER_NAME'],
'stats': {
"user_count": users_total(),
"status_count": local_posts() + local_comments(),
"domain_count": 1
},
'registrations': g.site.registration_mode != 'Closed',
'approval_required': g.site.registration_mode == 'RequireApplication'
}
return jsonify(retval)
@bp.route('/api/v1/instance/domain_blocks')
@cache.cached(timeout=600)
def domain_blocks():
use_allowlist = get_setting('use_allowlist', False)
if use_allowlist:
return jsonify([])
else:
retval = []
for domain in BannedInstances.query.all():
retval.append({
'domain': domain.domain,
'digest': sha256_digest(domain.domain),
'severity': 'suspend',
'comment': domain.reason if domain.reason else ''
})
return jsonify(retval)
@bp.route('/api/v3/site')
@cache.cached(timeout=600)
def lemmy_site():
return jsonify(lemmy_site_data())
@bp.route('/api/v3/federated_instances')
@cache.cached(timeout=600)
def lemmy_federated_instances():
instances = Instance.query.filter(Instance.id != 1).all()
linked = []
allowed = []
blocked = []
for instance in AllowedInstances.query.all():
allowed.append({"id": instance.id, "domain": instance.domain, "published": utcnow(), "updated": utcnow()})
for instance in BannedInstances.query.all():
blocked.append({"id": instance.id, "domain": instance.domain, "published": utcnow(), "updated": utcnow()})
for instance in instances:
instance_data = {"id": instance.id, "domain": instance.domain, "published": instance.created_at.isoformat(), "updated": instance.updated_at.isoformat()}
if instance.software:
instance_data['software'] = instance.software
if instance.version:
instance_data['version'] = instance.version
if not any(blocked_instance.get('domain') == instance.domain for blocked_instance in blocked):
linked.append(instance_data)
return jsonify({
"federated_instances": {
"linked": linked,
"allowed": allowed,
"blocked": blocked
}
})
@bp.route('/u/<actor>', methods=['GET', 'HEAD'])
def user_profile(actor):
""" Requests to this endpoint can be for a JSON representation of the user, or a HTML rendering of their profile.
The two types of requests are differentiated by the header """
actor = actor.strip()
# admins can view deleted accounts
if current_user.is_authenticated and current_user.is_admin():
if '@' in actor:
user: User = User.query.filter_by(ap_id=actor.lower()).first()
else:
user: User = User.query.filter(or_(User.user_name == actor, User.alt_user_name == actor)).filter_by(ap_id=None).first()
if user is None:
user = User.query.filter_by(ap_profile_id=f'https://{current_app.config["SERVER_NAME"]}/u/{actor.lower()}', deleted=False, ap_id=None).first()
else:
if '@' in actor:
user: User = User.query.filter_by(ap_id=actor.lower(), deleted=False, banned=False).first()
else:
user: User = User.query.filter(or_(User.user_name == actor, User.alt_user_name == actor)).filter_by(deleted=False, ap_id=None).first()
if user is None:
user = User.query.filter_by(ap_profile_id=f'https://{current_app.config["SERVER_NAME"]}/u/{actor.lower()}', deleted=False, ap_id=None).first()
if user is not None:
main_user_name = True
if user.alt_user_name == actor:
main_user_name = False
if request.method == 'HEAD':
if is_activitypub_request():
resp = jsonify('')
resp.content_type = 'application/activity+json'
return resp
else:
return ''
if is_activitypub_request():
server = current_app.config['SERVER_NAME']
actor_data = { "@context": default_context(),
"type": "Person" if not user.bot else "Service",
"id": user.public_url(main_user_name),
"preferredUsername": actor,
"name": user.title if user.title else user.user_name,
"inbox": f"{user.public_url(main_user_name)}/inbox",
"outbox": f"{user.public_url(main_user_name)}/outbox",
"discoverable": user.searchable,
"indexable": user.indexable,
"manuallyApprovesFollowers": False if not user.ap_manually_approves_followers else user.ap_manually_approves_followers,
"publicKey": {
"id": f"{user.public_url(main_user_name)}#main-key",
"owner": user.public_url(main_user_name),
"publicKeyPem": user.public_key
},
"endpoints": {
"sharedInbox": f"https://{server}/inbox"
},
"published": ap_datetime(user.created),
}
if not main_user_name:
actor_data['name'] = 'Anonymous'
actor_data['published'] = ap_datetime(user.created + timedelta(minutes=randint(-2592000, 0)))
actor_data['summary'] = '<p>This is an anonymous alternative account of another account. It has been generated automatically for a Piefed user who chose to keep their interactions private. They cannot reply to your messages using this account, but only upvote (like) or downvote (dislike). For more information about Piefed and this feature see <a href="https://piefed.social/post/205362">https://piefed.social/post/205362</a>.</p>'
if user.avatar_id is not None and main_user_name:
actor_data["icon"] = {
"type": "Image",
"url": f"https://{current_app.config['SERVER_NAME']}{user.avatar_image()}"
}
if user.cover_id is not None and main_user_name:
actor_data["image"] = {
"type": "Image",
"url": f"https://{current_app.config['SERVER_NAME']}{user.cover_image()}"
}
if user.about_html and main_user_name:
actor_data['summary'] = user.about_html
actor_data['source'] = {'content': user.about, 'mediaType': 'text/markdown'}
if user.matrix_user_id and main_user_name:
actor_data['matrixUserId'] = user.matrix_user_id
if user.extra_fields.count() > 0:
actor_data['attachment'] = []
for field in user.extra_fields:
actor_data['attachment'].append({'type': 'PropertyValue',
'name': field.label,
'value': field.text})
resp = jsonify(actor_data)
resp.content_type = 'application/activity+json'
resp.headers.set('Link', f'<https://{current_app.config["SERVER_NAME"]}/u/{actor}>; rel="alternate"; type="text/html"')
return resp
else:
if main_user_name:
return show_profile(user)
else:
return render_template('errors/alt_profile.html')
else:
abort(404)
@bp.route('/u/<actor>/outbox', methods=['GET'])
def user_outbox(actor):
outbox = {
"@context": default_context(),
'type': 'OrderedCollection',
'id': f"https://{current_app.config['SERVER_NAME']}/u/{actor}/outbox",
'orderedItems': [],
'totalItems': 0
}
resp = jsonify(outbox)
resp.content_type = 'application/activity+json'
return resp
@bp.route('/c/<actor>', methods=['GET'])
def community_profile(actor):
""" Requests to this endpoint can be for a JSON representation of the community, or a HTML rendering of it.
The two types of requests are differentiated by the header """
actor = actor.strip()
if '@' in actor:
# don't provide activitypub info for remote communities
if 'application/ld+json' in request.headers.get('Accept', '') or 'application/activity+json' in request.headers.get('Accept', ''):
abort(400)
community: Community = Community.query.filter_by(ap_id=actor.lower(), banned=False).first()
else:
community: Community = Community.query.filter_by(name=actor, ap_id=None).first()
if community is not None:
if is_activitypub_request():
server = current_app.config['SERVER_NAME']
actor_data = {"@context": default_context(),
"type": "Group",
"id": f"https://{server}/c/{actor}",
"name": community.title,
"sensitive": True if community.nsfw or community.nsfl else False,
"preferredUsername": actor,
"inbox": f"https://{server}/c/{actor}/inbox",
"outbox": f"https://{server}/c/{actor}/outbox",
"followers": f"https://{server}/c/{actor}/followers",
"moderators": f"https://{server}/c/{actor}/moderators",
"featured": f"https://{server}/c/{actor}/featured",
"attributedTo": f"https://{server}/c/{actor}/moderators",
"postingRestrictedToMods": community.restricted_to_mods or community.local_only,
"newModsWanted": community.new_mods_wanted,
"privateMods": community.private_mods,
"url": f"https://{server}/c/{actor}",
"publicKey": {
"id": f"https://{server}/c/{actor}#main-key",
"owner": f"https://{server}/c/{actor}",
"publicKeyPem": community.public_key
},
"endpoints": {
"sharedInbox": f"https://{server}/inbox"
},
"published": ap_datetime(community.created_at),
"updated": ap_datetime(community.last_active),
}
if community.description_html:
actor_data["summary"] = community.description_html
actor_data['source'] = {'content': community.description, 'mediaType': 'text/markdown'}
if community.icon_id is not None:
actor_data["icon"] = {
"type": "Image",
"url": f"https://{current_app.config['SERVER_NAME']}{community.icon_image()}"
}
if community.image_id is not None:
actor_data["image"] = {
"type": "Image",
"url": f"https://{current_app.config['SERVER_NAME']}{community.header_image()}"
}
resp = jsonify(actor_data)
resp.content_type = 'application/activity+json'
resp.headers.set('Link', f'<https://{current_app.config["SERVER_NAME"]}/c/{actor}>; rel="alternate"; type="text/html"')
return resp
else: # browser request - return html
return show_community(community)
else:
abort(404)
@bp.route('/inbox', methods=['POST'])
def shared_inbox():
try:
request_json = request.get_json(force=True)
except werkzeug.exceptions.BadRequest as e:
log_incoming_ap('', APLOG_NOTYPE, APLOG_FAILURE, None, 'Unable to parse json body: ' + e.description)
return '', 200
g.site = Site.query.get(1) # g.site is not initialized by @app.before_request when request.path == '/inbox'
store_ap_json = g.site.log_activitypub_json
saved_json = request_json if store_ap_json else None
if not 'id' in request_json or not 'type' in request_json or not 'actor' in request_json or not 'object' in request_json:
log_incoming_ap('', APLOG_NOTYPE, APLOG_FAILURE, saved_json, 'Missing minimum expected fields in JSON')
return '', 200
id = request_json['id']
if request_json['type'] == 'Announce' and isinstance(request_json['object'], dict):
object = request_json['object']
if not 'id' in object or not 'type' in object or not 'actor' in object or not 'object' in object:
if 'type' in object and (object['type'] == 'Page' or object['type'] == 'Note'):
log_incoming_ap(id, APLOG_ANNOUNCE, APLOG_IGNORED, saved_json, 'Intended for Mastodon')
else:
log_incoming_ap(id, APLOG_ANNOUNCE, APLOG_FAILURE, saved_json, 'Missing minimum expected fields in JSON Announce object')
return '', 200
if isinstance(object['actor'], str) and object['actor'].startswith('https://' + current_app.config['SERVER_NAME']):
log_incoming_ap(id, APLOG_DUPLICATE, APLOG_IGNORED, saved_json, 'Activity about local content which is already present')
return '', 200
id = object['id']
redis_client = get_redis_connection()
if redis_client.exists(id): # Something is sending same activity multiple times
log_incoming_ap(id, APLOG_DUPLICATE, APLOG_IGNORED, saved_json, 'Already aware of this activity')
return '', 200
redis_client.set(id, 1, ex=90) # Save the activity ID into redis, to avoid duplicate activities
# Ignore unutilised PeerTube activity
if isinstance(request_json['actor'], str) and request_json['actor'].endswith('accounts/peertube'):
log_incoming_ap(id, APLOG_PT_VIEW, APLOG_IGNORED, saved_json, 'PeerTube View or CacheFile activity')
return ''
# Ignore account deletion requests from users that do not already exist here
account_deletion = False
if (request_json['type'] == 'Delete' and
'object' in request_json and isinstance(request_json['object'], str) and
request_json['actor'] == request_json['object']):
account_deletion = True
actor = User.query.filter_by(ap_profile_id=request_json['actor'].lower()).first()
if not actor:
log_incoming_ap(id, APLOG_DELETE, APLOG_IGNORED, saved_json, 'Does not exist here')
return '', 200
else:
actor = find_actor_or_create(request_json['actor'])
if not actor:
actor_name = request_json['actor']
log_incoming_ap(id, APLOG_NOTYPE, APLOG_FAILURE, saved_json, f'Actor could not be found 1: {actor_name}')
return '', 200
if actor.is_local(): # should be impossible (can be Announced back, but not sent without access to privkey)
log_incoming_ap(id, APLOG_NOTYPE, APLOG_FAILURE, saved_json, 'ActivityPub activity from a local actor')
return '', 200
bounced = False
try:
HttpSignature.verify_request(request, actor.public_key, skip_date=True)
except VerificationError as e:
bounced = True
# HTTP sig will fail if a.gup.pe or PeerTube have bounced a request, so check LD sig instead
if 'signature' in request_json:
try:
LDSignature.verify_signature(request_json, actor.public_key)
except VerificationError as e:
log_incoming_ap(id, APLOG_NOTYPE, APLOG_FAILURE, saved_json, 'Could not verify LD signature: ' + str(e))
return '', 400
# not HTTP sig, and no LD sig, so reduce the inner object to just its remote ID, and then fetch it and check it in process_inbox_request()
elif ((request_json['type'] == 'Create' or request_json['type'] == 'Update') and
isinstance(request_json['object'], dict) and 'id' in request_json['object'] and isinstance(request_json['object']['id'], str)):
request_json['object'] = request_json['object']['id']
else:
log_incoming_ap(id, APLOG_NOTYPE, APLOG_FAILURE, saved_json, 'Could not verify HTTP signature: ' + str(e))
return '', 400
actor.instance.last_seen = utcnow()
actor.instance.dormant = False
actor.instance.gone_forever = False
actor.instance.failures = 0
actor.instance.ip_address = ip_address() if not bounced else ''
db.session.commit()
# When a user is deleted, the only way to be fairly sure they get deleted everywhere is to tell the whole fediverse.
# Earlier check means this is only for users that already exist, processing it here means that http signature will have been verified
if account_deletion == True:
if current_app.debug:
process_delete_request(request_json, store_ap_json)
else:
process_delete_request.delay(request_json, store_ap_json)
return ''
if current_app.debug:
process_inbox_request(request_json, store_ap_json)
else:
process_inbox_request.delay(request_json, store_ap_json)
return ''
@bp.route('/site_inbox', methods=['POST'])
def site_inbox():
return shared_inbox()
@bp.route('/u/<actor>/inbox', methods=['POST'])
def user_inbox(actor):
return shared_inbox()
@bp.route('/c/<actor>/inbox', methods=['POST'])
def community_inbox(actor):
return shared_inbox()
def replay_inbox_request(request_json):
if not 'id' in request_json or not 'type' in request_json or not 'actor' in request_json or not 'object' in request_json:
log_incoming_ap('', APLOG_NOTYPE, APLOG_FAILURE, request_json, 'REPLAY: Missing minimum expected fields in JSON')
return
id = request_json['id']
if request_json['type'] == 'Announce' and isinstance(request_json['object'], dict):
object = request_json['object']
if not 'id' in object or not 'type' in object or not 'actor' in object or not 'object' in object:
if 'type' in object and (object['type'] == 'Page' or object['type'] == 'Note'):
log_incoming_ap(id, APLOG_ANNOUNCE, APLOG_IGNORED, request_json, 'REPLAY: Intended for Mastodon')
else:
log_incoming_ap(id, APLOG_ANNOUNCE, APLOG_FAILURE, request_json, 'REPLAY: Missing minimum expected fields in JSON Announce object')
return
if isinstance(object['actor'], str) and object['actor'].startswith('https://' + current_app.config['SERVER_NAME']):
log_incoming_ap(id, APLOG_DUPLICATE, APLOG_IGNORED, saved_json, 'Activity about local content which is already present')
return
# Ignore unutilised PeerTube activity
if isinstance(request_json['actor'], str) and request_json['actor'].endswith('accounts/peertube'):
log_incoming_ap(id, APLOG_PT_VIEW, APLOG_IGNORED, request_json, 'REPLAY: PeerTube View or CacheFile activity')
return
# Ignore account deletion requests from users that do not already exist here
account_deletion = False
if (request_json['type'] == 'Delete' and
'object' in request_json and isinstance(request_json['object'], str) and
request_json['actor'] == request_json['object']):
account_deletion = True
actor = User.query.filter_by(ap_profile_id=request_json['actor'].lower()).first()
if not actor:
log_incoming_ap(id, APLOG_DELETE, APLOG_IGNORED, request_json, 'REPLAY: Does not exist here')
return
else:
actor = find_actor_or_create(request_json['actor'])
if not actor:
actor_name = request_json['actor']
log_incoming_ap(id, APLOG_NOTYPE, APLOG_FAILURE, request_json, f'REPLAY: Actor could not be found 1: {actor_name}')
return
if actor.is_local(): # should be impossible (can be Announced back, but not sent back without access to privkey)
log_incoming_ap(id, APLOG_NOTYPE, APLOG_FAILURE, request_json, 'REPLAY: ActivityPub activity from a local actor')
return
# When a user is deleted, the only way to be fairly sure they get deleted everywhere is to tell the whole fediverse.
if account_deletion == True:
process_delete_request(request_json, True)
return
process_inbox_request(request_json, True)
return
@celery.task
def process_inbox_request(request_json, store_ap_json):
with current_app.app_context():
site = Site.query.get(1) # can't use g.site because celery doesn't use Flask's g variable
# For an Announce, Accept, or Reject, we have the community, and need to find the user
# For everything else, we have the user, and need to find the community
# Benefits of always using request_json['actor']:
# It's the actor who signed the request, and whose signature has been verified
# Because of the earlier check, we know that they already exist, and so don't need to check again
# Using actors from inner objects has a vulnerability to spoofing attacks (e.g. if 'attributedTo' doesn't match the 'Create' actor)
saved_json = request_json if store_ap_json else None
id = request_json['id']
if request_json['type'] == 'Announce' or request_json['type'] == 'Accept' or request_json['type'] == 'Reject':
community_ap_id = request_json['actor']
community = find_actor_or_create(community_ap_id, community_only=True, create_if_not_found=False)
if not community or not isinstance(community, Community):
log_incoming_ap(id, APLOG_ANNOUNCE, APLOG_FAILURE, saved_json, 'Actor was not a community')
return
user_ap_id = None # found in 'if request_json['type'] == 'Announce', or it's a local user (for 'Accept'/'Reject')
else:
user_ap_id = request_json['actor']
user = find_actor_or_create(user_ap_id, create_if_not_found=False)
if not user or not isinstance(user, User):
log_incoming_ap(id, APLOG_NOTYPE, APLOG_FAILURE, saved_json, 'Actor was not a user')
return
user.last_seen = site.last_active = utcnow()
db.session.commit()
community = None # found as needed
# Announce: take care of inner objects that are just a URL (PeerTube, a.gup.pe), or find the user if the inner object is a dict
if request_json['type'] == 'Announce':
if isinstance(request_json['object'], str):
if request_json['object'].startswith('https://' + current_app.config['SERVER_NAME']):
log_incoming_ap(id, APLOG_DUPLICATE, APLOG_IGNORED, saved_json, 'Activity about local content which is already present')
return
post = resolve_remote_post(request_json['object'], community, id, store_ap_json)
if post:
log_incoming_ap(id, APLOG_ANNOUNCE, APLOG_SUCCESS, request_json)
else:
log_incoming_ap(id, APLOG_ANNOUNCE, APLOG_FAILURE, request_json, 'Could not resolve post')
return
user_ap_id = request_json['object']['actor']
user = find_actor_or_create(user_ap_id)
if not user or not isinstance(user, User):
log_incoming_ap(id, APLOG_ANNOUNCE, APLOG_FAILURE, saved_json, 'Blocked or unfound user for Announce object actor ' + user_ap_id)
return
user.last_seen = site.last_active = utcnow()
user.instance.last_seen = utcnow()
user.instance.dormant = False
user.instance.gone_forever = False
user.instance.failures = 0
db.session.commit()
# Now that we have the community and the user from an Announce, we can save repeating code by removing it
# core_activity is checked for its Type, but the original request_json is sometimes passed to any other functions
announced = True
core_activity = request_json['object']
else:
announced = False
core_activity = request_json
# Follow: remote user wants to join/follow one of our users or communities
if core_activity['type'] == 'Follow':
target_ap_id = core_activity['object']
follow_id = core_activity['id']
target = find_actor_or_create(target_ap_id, create_if_not_found=False)
if not target:
log_incoming_ap(id, APLOG_FOLLOW, APLOG_FAILURE, saved_json, 'Could not find target of Follow')
return
if isinstance(target, Community):
community = target
reject_follow = False
if community.local_only:
log_incoming_ap(id, APLOG_FOLLOW, APLOG_FAILURE, saved_json, 'Local only cannot be followed by remote users')
reject_follow = True
else:
# check if user is banned from this community
user_banned = CommunityBan.query.filter_by(user_id=user.id, community_id=community.id).first()
if user_banned:
log_incoming_ap(id, APLOG_FOLLOW, APLOG_FAILURE, saved_json, 'Remote user has been banned')
reject_follow = True
if reject_follow:
# send reject message to deny the follow
reject = {"@context": default_context(), "actor": community.public_url(), "to": [user.public_url()],
"object": {"actor": user.public_url(), "to": None, "object": community.public_url(), "type": "Follow", "id": follow_id},
"type": "Reject", "id": f"https://{current_app.config['SERVER_NAME']}/activities/reject/" + gibberish(32)}
post_request(user.ap_inbox_url, reject, community.private_key, f"{community.public_url()}#main-key")
else:
if community_membership(user, community) != SUBSCRIPTION_MEMBER:
member = CommunityMember(user_id=user.id, community_id=community.id)
db.session.add(member)
community.subscriptions_count += 1
db.session.commit()
cache.delete_memoized(community_membership, user, community)
# send accept message to acknowledge the follow
accept = {"@context": default_context(), "actor": community.public_url(), "to": [user.public_url()],
"object": {"actor": user.public_url(), "to": None, "object": community.public_url(), "type": "Follow", "id": follow_id},
"type": "Accept", "id": f"https://{current_app.config['SERVER_NAME']}/activities/accept/" + gibberish(32)}
post_request(user.ap_inbox_url, accept, community.private_key, f"{community.public_url()}#main-key")
log_incoming_ap(id, APLOG_FOLLOW, APLOG_SUCCESS, saved_json)
return
elif isinstance(target, User):
local_user = target
remote_user = user
if not local_user.is_local():
log_incoming_ap(id, APLOG_FOLLOW, APLOG_FAILURE, saved_json, 'Follow request for remote user received')
return
existing_follower = UserFollower.query.filter_by(local_user_id=local_user.id, remote_user_id=remote_user.id).first()
if not existing_follower:
auto_accept = not local_user.ap_manually_approves_followers
new_follower = UserFollower(local_user_id=local_user.id, remote_user_id=remote_user.id, is_accepted=auto_accept)
if not local_user.ap_followers_url:
local_user.ap_followers_url = local_user.public_url() + '/followers'
db.session.add(new_follower)
db.session.commit()
accept = {"@context": default_context(), "actor": local_user.public_url(), "to": [remote_user.public_url()],
"object": {"actor": remote_user.public_url(), "to": None, "object": local_user.public_url(), "type": "Follow", "id": follow_id},
"type": "Accept", "id": f"https://{current_app.config['SERVER_NAME']}/activities/accept/" + gibberish(32)}
post_request(remote_user.ap_inbox_url, accept, local_user.private_key, f"{local_user.public_url()}#main-key")
log_incoming_ap(id, APLOG_FOLLOW, APLOG_SUCCESS, saved_json)
return
# Accept: remote server is accepting our previous follow request
if core_activity['type'] == 'Accept':
user = None
if isinstance(core_activity['object'], str): # a.gup.pe accepts using a string with the ID of the follow request
join_request_parts = core_activity['object'].split('/')
join_request = CommunityJoinRequest.query.get(join_request_parts[-1])
if join_request:
user = User.query.get(join_request.user_id)
elif core_activity['object']['type'] == 'Follow':
user_ap_id = core_activity['object']['actor']
user = find_actor_or_create(user_ap_id, create_if_not_found=False)
if not user:
log_incoming_ap(id, APLOG_ACCEPT, APLOG_FAILURE, saved_json, 'Could not find recipient of Accept')
return
join_request = CommunityJoinRequest.query.filter_by(user_id=user.id, community_id=community.id).first()
if join_request:
existing_membership = CommunityMember.query.filter_by(user_id=join_request.user_id, community_id=join_request.community_id).first()
if not existing_membership:
member = CommunityMember(user_id=join_request.user_id, community_id=join_request.community_id)
db.session.add(member)
community.subscriptions_count += 1
db.session.commit()
cache.delete_memoized(community_membership, user, community)
log_incoming_ap(id, APLOG_ACCEPT, APLOG_SUCCESS, saved_json)
return
# Reject: remote server is rejecting our previous follow request
if core_activity['type'] == 'Reject':
if core_activity['object']['type'] == 'Follow':
user_ap_id = core_activity['object']['actor']
user = find_actor_or_create(user_ap_id, create_if_not_found=False)
if not user:
log_incoming_ap(id, APLOG_ACCEPT, APLOG_FAILURE, saved_json, 'Could not find recipient of Reject')
return
join_request = CommunityJoinRequest.query.filter_by(user_id=user.id, community_id=community.id).first()
if join_request:
db.session.delete(join_request)
existing_membership = CommunityMember.query.filter_by(user_id=user.id, community_id=community.id).first()
if existing_membership:
db.session.delete(existing_membership)
cache.delete_memoized(community_membership, user, community)
db.session.commit()
log_incoming_ap(id, APLOG_ACCEPT, APLOG_SUCCESS, saved_json)
return
# Create is new content. Update is often an edit, but Updates from Lemmy can also be new content
if core_activity['type'] == 'Create' or core_activity['type'] == 'Update':
if isinstance(core_activity['object'], str):
core_activity = verify_object_from_source(core_activity) # change core_activity['object'] from str to dict, then process normally
if not request_json:
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'Could not verify unsigned request from source')
return
if core_activity['object']['type'] == 'ChatMessage':
sender = user
recipient_ap_id = core_activity['object']['to'][0]
recipient = find_actor_or_create(recipient_ap_id, create_if_not_found=False)
if recipient and recipient.is_local():
if sender.created_recently() or sender.reputation <= -10:
log_incoming_ap(id, APLOG_CHATMESSAGE, APLOG_FAILURE, saved_json, 'Sender not eligible to send')
return
elif recipient.has_blocked_user(sender.id) or recipient.has_blocked_instance(sender.instance_id):
log_incoming_ap(id, APLOG_CHATMESSAGE, APLOG_FAILURE, saved_json, 'Sender blocked by recipient')
return
else:
# Find existing conversation to add to
existing_conversation = Conversation.find_existing_conversation(recipient=recipient, sender=sender)
if not existing_conversation:
existing_conversation = Conversation(user_id=sender.id)
existing_conversation.members.append(recipient)
existing_conversation.members.append(sender)
db.session.add(existing_conversation)
db.session.commit()
# Save ChatMessage to DB
encrypted = core_activity['object']['encrypted'] if 'encrypted' in core_activity['object'] else None
new_message = ChatMessage(sender_id=sender.id, recipient_id=recipient.id, conversation_id=existing_conversation.id,
body_html=core_activity['object']['content'],
body=html_to_text(core_activity['object']['content']),
encrypted=encrypted)
db.session.add(new_message)
existing_conversation.updated_at = utcnow()
db.session.commit()
# Notify recipient
notify = Notification(title=shorten_string('New message from ' + sender.display_name()),
url=f'/chat/{existing_conversation.id}#message_{new_message}', user_id=recipient.id,
author_id=sender.id)
db.session.add(notify)
recipient.unread_notifications += 1
existing_conversation.read = False
db.session.commit()
log_incoming_ap(id, APLOG_CHATMESSAGE, APLOG_SUCCESS, saved_json)
return
# inner object of Create is not a ChatMessage
else:
if (core_activity['object']['type'] == 'Note' and 'name' in core_activity['object'] and # Poll Votes
'inReplyTo' in core_activity['object'] and 'attributedTo' in core_activity['object']):
post_being_replied_to = Post.query.filter_by(ap_id=core_activity['object']['inReplyTo']).first()
if post_being_replied_to:
poll_data = Poll.query.get(post_being_replied_to.id)
choice = PollChoice.query.filter_by(post_id=post_being_replied_to.id, choice_text=core_activity['object']['name']).first()
if poll_data and choice:
poll_data.vote_for_choice(choice.id, user.id)
db.session.commit()
log_incoming_ap(id, APLOG_CREATE, APLOG_SUCCESS, saved_json)
if post_being_replied_to.author.is_local():
inform_followers_of_post_update(post_being_replied_to.id, user.instance_id)
return
if not announced:
community = find_community(request_json)
if not community:
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'Blocked or unfound community')
return
if not ensure_domains_match(core_activity['object']):
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'Domains do not match')
return
if community.local_only:
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'Remote Create in local_only community')
return
object_type = core_activity['object']['type']
new_content_types = ['Page', 'Article', 'Link', 'Note', 'Question']
if object_type in new_content_types: # create or update a post
process_new_content(user, community, store_ap_json, request_json, announced)
return
elif object_type == 'Video': # PeerTube: editing a video (mostly used to update post score)
post = Post.query.filter_by(ap_id=core_activity['object']['id']).first()
if post:
if user.id == post.user_id:
update_post_from_activity(post, request_json)
log_incoming_ap(id, APLOG_UPDATE, APLOG_SUCCESS, saved_json)
return
else:
log_incoming_ap(id, APLOG_UPDATE, APLOG_FAILURE, saved_json, 'Edit attempt denied')
return
else:
log_incoming_ap(id, APLOG_UPDATE, APLOG_FAILURE, saved_json, 'PeerTube post not found')
return
elif announced and core_activity['type'] == 'Update' and core_activity['object']['type'] == 'Group':
# force refresh next time community is heard from
community.ap_fetched_at = None
db.session.commit()
log_incoming_ap(id, APLOG_UPDATE, APLOG_SUCCESS, saved_json)
else:
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'Unacceptable type (create): ' + object_type)
return
if core_activity['type'] == 'Delete':
if isinstance(core_activity['object'], str):
ap_id = core_activity['object'] # lemmy
else:
ap_id = core_activity['object']['id'] # kbin
to_delete = find_liked_object(ap_id) # Just for Posts and Replies (User deletes go through process_delete_request())
if to_delete:
if to_delete.deleted:
log_incoming_ap(id, APLOG_DELETE, APLOG_IGNORED, saved_json, 'Activity about local content which is already deleted')
else:
reason = core_activity['summary'] if 'summary' in core_activity else ''
delete_post_or_comment(user, to_delete, store_ap_json, request_json, reason)
if not announced:
announce_activity_to_followers(to_delete.community, user, request_json)
else:
log_incoming_ap(id, APLOG_DELETE, APLOG_FAILURE, saved_json, 'Delete: cannot find ' + ap_id)
return
if core_activity['type'] == 'Like' or core_activity['type'] == 'EmojiReact': # Upvote
process_upvote(user, store_ap_json, request_json, announced)
return
if core_activity['type'] == 'Dislike': # Downvote
if site.enable_downvotes is False:
log_incoming_ap(id, APLOG_DISLIKE, APLOG_IGNORED, saved_json, 'Dislike ignored because of allow_dislike setting')
return
process_downvote(user, store_ap_json, request_json, announced)
return
if core_activity['type'] == 'Flag': # Reported content
reported = find_reported_object(core_activity['object'])
if reported:
process_report(user, reported, core_activity)
log_incoming_ap(id, APLOG_REPORT, APLOG_SUCCESS, saved_json)
announce_activity_to_followers(reported.community, user, request_json)
else:
log_incoming_ap(id, APLOG_REPORT, APLOG_IGNORED, saved_json, 'Report ignored due to missing content')
return
if core_activity['type'] == 'Lock': # Post lock
mod = user
post_id = core_activity['object']
post = Post.query.filter_by(ap_id=post_id).first()
reason = core_activity['summary'] if 'summary' in core_activity else ''
if post:
if post.community.is_moderator(mod) or post.community.is_instance_admin(mod):
post.comments_enabled = False
db.session.commit()
add_to_modlog_activitypub('lock_post', mod, community_id=post.community.id,
link_text=shorten_string(post.title), link=f'post/{post.id}',
reason=reason)
log_incoming_ap(id, APLOG_LOCK, APLOG_SUCCESS, saved_json)
else:
log_incoming_ap(id, APLOG_LOCK, APLOG_FAILURE, saved_json, 'Lock: Does not have permission')
else:
log_incoming_ap(id, APLOG_LOCK, APLOG_FAILURE, saved_json, 'Lock: post not found')
return
if core_activity['type'] == 'Add': # Add mods, or sticky a post
mod = user
if not announced:
community = find_community(core_activity)
if community:
if not community.is_moderator(mod) and not community.is_instance_admin(mod):
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Does not have permission')
return
target = core_activity['target']
featured_url = community.ap_featured_url
moderators_url = community.ap_moderators_url
if target == featured_url:
post = Post.query.filter_by(ap_id=core_activity['object']).first()
if post:
post.sticky = True
db.session.commit()
log_incoming_ap(id, APLOG_ADD, APLOG_SUCCESS, saved_json)
else:
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Cannot find: ' + core_activity['object'])
return
if target == moderators_url:
new_mod = find_actor_or_create(core_activity['object'])
if new_mod:
existing_membership = CommunityMember.query.filter_by(community_id=community.id, user_id=new_mod.id).first()
if existing_membership:
existing_membership.is_moderator = True
else:
new_membership = CommunityMember(community_id=community.id, user_id=new_mod.id, is_moderator=True)
db.session.add(new_membership)
db.session.commit()
log_incoming_ap(id, APLOG_ADD, APLOG_SUCCESS, saved_json)
else:
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Cannot find: ' + core_activity['object'])
return
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Unknown target for Add')
else:
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Add: cannot find community')
return
if core_activity['type'] == 'Remove': # Remove mods, or unsticky a post
mod = user
if not announced:
community = find_community(core_activity)
if community:
if not community.is_moderator(mod) and not community.is_instance_admin(mod):
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Does not have permission')
return
target = core_activity['target']
featured_url = community.ap_featured_url
moderators_url = community.ap_moderators_url
if target == featured_url:
post = Post.query.filter_by(ap_id=core_activity['object']).first()
if post:
post.sticky = False
db.session.commit()
log_incoming_ap(id, APLOG_REMOVE, APLOG_SUCCESS, saved_json)
else:
log_incoming_ap(id, APLOG_REMOVE, APLOG_FAILURE, saved_json, 'Cannot find: ' + core_activity['object'])
return
if target == moderators_url:
old_mod = find_actor_or_create(core_activity['object'])
if old_mod:
existing_membership = CommunityMember.query.filter_by(community_id=community.id, user_id=old_mod.id).first()
if existing_membership:
existing_membership.is_moderator = False
db.session.commit()
log_incoming_ap(id, APLOG_REMOVE, APLOG_SUCCESS, saved_json)
else:
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Cannot find: ' + core_activity['object'])
return
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Unknown target for Remove')
else:
log_incoming_ap(id, APLOG_ADD, APLOG_FAILURE, saved_json, 'Remove: cannot find community')
return
if core_activity['type'] == 'Block': # User Ban
"""
Sent directly (not Announced) if a remote Admin is banning one of their own users from their site
(e.g. lemmy.ml is banning lemmy.ml/u/troll)
Also send directly if a remote Admin or Mod is banning one of our users from one of their communities
(e.g. lemmy.ml is banning piefed.social/u/troll from lemmy.ml/c/memes)
Is Announced if a remote Admin or Mod is banning a remote user from one of their communities (a remote user could also be one of our local users)
(e.g. lemmy.ml is banning piefed.social/u/troll or lemmy.world/u/troll from lemmy.ml/c/memes)
Same activity can be sent direct and Announced, but one will be filtered out when shared_inbox() checks for it as a duplicate
We currently don't receive a Block if a remote Admin is banning a user of a different instance from their site (it's hacked by all the relevant communities Announcing a community ban)
This may change in the future, so it's something to monitor
If / When this changes, the code below will need updating, and we'll have to do extra work
"""
if not announced and store_ap_json:
core_activity['cc'] = [] # cut very long list of instances
blocker = user
blocked_ap_id = core_activity['object'].lower()
blocked = User.query.filter_by(ap_profile_id=blocked_ap_id).first()
if not blocked:
log_incoming_ap(id, APLOG_USERBAN, APLOG_IGNORED, saved_json, 'Does not exist here')
return
if blocked.banned: # We may have already banned them - we don't want remote temp bans to over-ride our permanent bans
log_incoming_ap(id, APLOG_USERBAN, APLOG_IGNORED, saved_json, 'Already banned')
return
remove_data = core_activity['removeData'] if 'removeData' in core_activity else False
target = core_activity['target']
if target.count('/') < 4: # site ban
if not blocker.is_instance_admin():
log_incoming_ap(id, APLOG_USERBAN, APLOG_FAILURE, saved_json, 'Does not have permission')
return
if blocked.is_local():
log_incoming_ap(id, APLOG_USERBAN, APLOG_MONITOR, request_json, 'Remote Admin in banning one of our users from their site')
current_app.logger.error('Remote Admin in banning one of our users from their site: ' + str(request_json))
return
if blocked.instance_id != blocker.instance_id:
log_incoming_ap(id, APLOG_USERBAN, APLOG_MONITOR, request_json, 'Remote Admin is banning a user of a different instance from their site')
current_app.logger.error('Remote Admin is banning a user of a different instance from their site: ' + str(request_json))
return
blocked.banned = True
if 'expires' in core_activity:
blocked.banned_until = core_activity['expires']
elif 'endTime' in core_activity:
blocked.banned_until = core_activity['endTime']
db.session.commit()
if remove_data:
site_ban_remove_data(blocker.id, blocked)
log_incoming_ap(id, APLOG_USERBAN, APLOG_SUCCESS, saved_json)
else: # community ban (community will already known if activity was Announced)
community = community if community else find_actor_or_create(target, create_if_not_found=False, community_only=True)
if not community:
log_incoming_ap(id, APLOG_USERBAN, APLOG_IGNORED, saved_json, 'Blocked or unfound community')
return
if not community.is_moderator(blocker) and not community.is_instance_admin(blocker):
log_incoming_ap(id, APLOG_USERBAN, APLOG_FAILURE, saved_json, 'Does not have permission')
return
if remove_data:
community_ban_remove_data(blocker.id, community.id, blocked)
ban_user(blocker, blocked, community, core_activity)
log_incoming_ap(id, APLOG_USERBAN, APLOG_SUCCESS, saved_json)
return
if core_activity['type'] == 'Undo':
if core_activity['object']['type'] == 'Follow': # Unsubscribe from a community or user
target_ap_id = core_activity['object']['object']
target = find_actor_or_create(target_ap_id, create_if_not_found=False)
if isinstance(target, Community):
community = target
member = CommunityMember.query.filter_by(user_id=user.id, community_id=community.id).first()
join_request = CommunityJoinRequest.query.filter_by(user_id=user.id, community_id=community.id).first()
if member:
db.session.delete(member)
community.subscriptions_count -= 1
if join_request:
db.session.delete(join_request)
db.session.commit()
cache.delete_memoized(community_membership, user, community)
log_incoming_ap(id, APLOG_UNDO_FOLLOW, APLOG_SUCCESS, saved_json)
return
if isinstance(target, User):
local_user = target
remote_user = user
follower = UserFollower.query.filter_by(local_user_id=local_user.id, remote_user_id=remote_user.id, is_accepted=True).first()
if follower:
db.session.delete(follower)
db.session.commit()
log_incoming_ap(id, APLOG_UNDO_FOLLOW, APLOG_SUCCESS, saved_json)
return
if not target:
log_incoming_ap(id, APLOG_UNDO_FOLLOW, APLOG_FAILURE, saved_json, 'Unfound target')
return
if core_activity['object']['type'] == 'Delete': # Restore something previously deleted
if isinstance(core_activity['object']['object'], str):
ap_id = core_activity['object']['object'] # lemmy
else:
ap_id = core_activity['object']['object']['id'] # kbin
restorer = user
to_restore = find_liked_object(ap_id) # a user or a mod/admin is undoing the delete of a post or reply
if to_restore:
if not to_restore.deleted:
log_incoming_ap(id, APLOG_UNDO_DELETE, APLOG_IGNORED, saved_json, 'Activity about local content which is already restored')
else:
reason = core_activity['object']['summary'] if 'summary' in core_activity['object'] else ''
restore_post_or_comment(restorer, to_restore, store_ap_json, request_json, reason)
if not announced:
announce_activity_to_followers(to_restore.community, user, request_json)
else:
log_incoming_ap(id, APLOG_UNDO_DELETE, APLOG_FAILURE, saved_json, 'Undo delete: cannot find ' + ap_id)
return
if core_activity['object']['type'] == 'Like' or core_activity['object']['type'] == 'Dislike': # Undoing an upvote or downvote
post = comment = None
target_ap_id = core_activity['object']['object']
post_or_comment = undo_vote(comment, post, target_ap_id, user)
if post_or_comment:
log_incoming_ap(id, APLOG_UNDO_VOTE, APLOG_SUCCESS, saved_json)
if not announced:
announce_activity_to_followers(post_or_comment.community, user, request_json)
else:
log_incoming_ap(id, APLOG_UNDO_VOTE, APLOG_FAILURE, saved_json, 'Unfound object ' + target_ap_id)
return
if core_activity['object']['type'] == 'Lock': # Undo of post lock
mod = user
post_id = core_activity['object']['object']
post = Post.query.filter_by(ap_id=post_id).first()
reason = core_activity['summary'] if 'summary' in core_activity else ''
if post:
if post.community.is_moderator(mod) or post.community.is_instance_admin(mod):
post.comments_enabled = True
db.session.commit()
add_to_modlog_activitypub('unlock_post', mod, community_id=post.community.id,
link_text=shorten_string(post.title), link=f'post/{post.id}',
reason=reason)
log_incoming_ap(id, APLOG_LOCK, APLOG_SUCCESS, saved_json)
else:
log_incoming_ap(id, APLOG_LOCK, APLOG_FAILURE, saved_json, 'Lock: Does not have permission')
else:
log_incoming_ap(id, APLOG_LOCK, APLOG_FAILURE, saved_json, 'Lock: post not found')
return
if core_activity['object']['type'] == 'Block': # Undo of user ban
if announced and store_ap_json:
core_activity['cc'] = [] # cut very long list of instances
core_activity['object']['cc'] = []
unblocker = user
unblocked_ap_id = core_activity['object']['object'].lower()
unblocked = User.query.filter_by(ap_profile_id=unblocked_ap_id).first()
if not unblocked:
log_incoming_ap(id, APLOG_USERBAN, APLOG_IGNORED, saved_json, 'Does not exist here')
return
# in future, we'll need to know who banned a user, so this activity doesn't unban a user that was bannned by a local admin
# (no removeData field in an undo/ban - cannot restore without knowing if deletion was part of ban, or different moderator action)
target = core_activity['object']['target']
if target.count('/') < 4: # undo of site ban
if not unblocker.is_instance_admin():
log_incoming_ap(id, APLOG_USERBAN, APLOG_FAILURE, saved_json, 'Does not have permission')
return
if unblocked.is_local():
log_incoming_ap(id, APLOG_USERBAN, APLOG_MONITOR, request_json, 'Remote Admin in unbanning one of our users from their site')
current_app.logger.error('Remote Admin in unbanning one of our users from their site: ' + str(request_json))
return
if unblocked.instance_id != unblocker.instance_id:
log_incoming_ap(id, APLOG_USERBAN, APLOG_MONITOR, request_json, 'Remote Admin is unbanning a user of a different instance from their site')
current_app.logger.error('Remote Admin is unbanning a user of a different instance from their site: ' + str(request_json))
return
unblocked.banned = False
unblocked.banned_until = None
db.session.commit()
log_incoming_ap(id, APLOG_USERBAN, APLOG_SUCCESS, saved_json)
else: # undo community ban (community will already known if activity was Announced)
community = community if community else find_actor_or_create(target, create_if_not_found=False, community_only=True)
if not community:
log_incoming_ap(id, APLOG_USERBAN, APLOG_IGNORED, saved_json, 'Blocked or unfound community')
return
if not community.is_moderator(unblocker) and not community.is_instance_admin(unblocker):
log_incoming_ap(id, APLOG_USERBAN, APLOG_FAILURE, saved_json, 'Does not have permission')
return
unban_user(unblocker, unblocked, community, core_activity)
log_incoming_ap(id, APLOG_USERBAN, APLOG_SUCCESS, saved_json)
return
log_incoming_ap(id, APLOG_MONITOR, APLOG_PROCESSING, request_json, 'Unmatched activity')
@celery.task
def process_delete_request(request_json, store_ap_json):
with current_app.app_context():
# this function processes self-deletes (retain case here, as user_removed_from_remote_server() uses a JSON request)
saved_json = request_json if store_ap_json else None
id = request_json['id']
user_ap_id = request_json['actor']
user = User.query.filter_by(ap_profile_id=user_ap_id.lower()).first()
if user:
# check that the user really has been deleted, to avoid spoofing attacks
if user_removed_from_remote_server(user_ap_id, is_piefed=user.instance.software == 'PieFed'):
# soft self-delete
user.deleted = True
user.deleted_by = user.id
db.session.commit()
log_incoming_ap(id, APLOG_DELETE, APLOG_SUCCESS, saved_json)
else:
log_incoming_ap(id, APLOG_DELETE, APLOG_FAILURE, saved_json, 'User not actually deleted.')
# TODO: acknowledge 'removeData' field from Lemmy
# TODO: hard-delete in 7 days (should purge avatar and cover images, but keep posts and replies unless already soft-deleted by removeData = True)
def announce_activity_to_followers(community, creator, activity):
# avoid announcing activity sent to local users unless it is also in a local community
if not community.is_local():
return
# remove context from what will be inner object
del activity["@context"]
announce_activity = {
'@context': default_context(),
"actor": community.public_url(),
"to": [
"https://www.w3.org/ns/activitystreams#Public"
],
"object": activity,
"cc": [
f"{community.public_url()}/followers"
],
"type": "Announce",
"id": f"https://{current_app.config['SERVER_NAME']}/activities/announce/{gibberish(15)}"
}
for instance in community.following_instances(include_dormant=True):
# awaken dormant instances if they've been sleeping for long enough to be worth trying again
awaken_dormant_instance(instance)
# All good? Send!
if instance and instance.online() and not instance_banned(instance.inbox):
if creator.instance_id != instance.id: # don't send it to the instance that hosts the creator as presumably they already have the content
send_to_remote_instance(instance.id, community.id, announce_activity)
@bp.route('/c/<actor>/outbox', methods=['GET'])
def community_outbox(actor):
actor = actor.strip()
community = Community.query.filter_by(name=actor, banned=False, ap_id=None).first()
if community is not None:
sticky_posts = community.posts.filter(Post.sticky == True, Post.deleted == False).order_by(desc(Post.posted_at)).limit(50).all()
remaining_limit = 50 - len(sticky_posts)
remaining_posts = community.posts.filter(Post.sticky == False, Post.deleted == False).order_by(desc(Post.posted_at)).limit(remaining_limit).all()
posts = sticky_posts + remaining_posts
community_data = {
"@context": default_context(),
"type": "OrderedCollection",
"id": f"https://{current_app.config['SERVER_NAME']}/c/{actor}/outbox",
"totalItems": len(posts),
"orderedItems": []
}
for post in posts:
community_data['orderedItems'].append(post_to_activity(post, community))
return jsonify(community_data)
@bp.route('/c/<actor>/featured', methods=['GET'])
def community_featured(actor):
actor = actor.strip()
community = Community.query.filter_by(name=actor, banned=False, ap_id=None).first()
if community is not None:
posts = Post.query.filter_by(community_id=community.id, sticky=True, deleted=False).all()
community_data = {
"@context": default_context(),
"type": "OrderedCollection",
"id": f"https://{current_app.config['SERVER_NAME']}/c/{actor}/featured",
"totalItems": len(posts),
"orderedItems": []
}
for post in posts:
community_data['orderedItems'].append(post_to_page(post))
return jsonify(community_data)
@bp.route('/c/<actor>/moderators', methods=['GET'])
def community_moderators_route(actor):
actor = actor.strip()
community = Community.query.filter_by(name=actor, banned=False, ap_id=None).first()
if community is not None:
moderator_ids = community_moderators(community.id)
moderators = User.query.filter(User.id.in_([mod.user_id for mod in moderator_ids])).all()
community_data = {
"@context": default_context(),
"type": "OrderedCollection",
"id": f"https://{current_app.config['SERVER_NAME']}/c/{actor}/moderators",
"totalItems": len(moderators),
"orderedItems": []
}
for moderator in moderators:
community_data['orderedItems'].append(moderator.ap_profile_id)
return jsonify(community_data)
@bp.route('/c/<actor>/followers', methods=['GET'])
def community_followers(actor):
actor = actor.strip()
community = Community.query.filter_by(name=actor, banned=False, ap_id=None).first()
if community is not None:
result = {
"@context": default_context(),
"id": f'https://{current_app.config["SERVER_NAME"]}/c/{actor}/followers',
"type": "Collection",
"totalItems": community_members(community.id),
"items": []
}
resp = jsonify(result)
resp.content_type = 'application/activity+json'
return resp
else:
abort(404)
@bp.route('/u/<actor>/followers', methods=['GET'])
def user_followers(actor):
actor = actor.strip()
user = User.query.filter_by(user_name=actor, banned=False, ap_id=None).first()
if user is not None and user.ap_followers_url:
# Get all followers, except those that are blocked by user by doing an outer join
followers = User.query.join(UserFollower, User.id == UserFollower.remote_user_id)\
.outerjoin(UserBlock, (User.id == UserBlock.blocker_id) & (UserFollower.local_user_id == UserBlock.blocked_id))\
.filter((UserFollower.local_user_id == user.id) & (UserBlock.id == None))\
.all()
items = []
for f in followers:
items.append(f.ap_public_url)
result = {
"@context": default_context(),
"id": user.ap_followers_url,
"type": "Collection",
"totalItems": len(items),
"items": items
}
resp = jsonify(result)
resp.content_type = 'application/activity+json'
return resp
else:
abort(404)
@bp.route('/comment/<int:comment_id>', methods=['GET', 'HEAD'])
def comment_ap(comment_id):
reply = PostReply.query.get_or_404(comment_id)
if is_activitypub_request():
reply_data = comment_model_to_json(reply) if request.method == 'GET' else []
resp = jsonify(reply_data)
resp.content_type = 'application/activity+json'
resp.headers.set('Vary', 'Accept')
resp.headers.set('Link', f'<https://{current_app.config["SERVER_NAME"]}/comment/{reply.id}>; rel="alternate"; type="text/html"')
return resp
else:
return continue_discussion(reply.post.id, comment_id)
@bp.route('/post/<int:post_id>/', methods=['GET', 'HEAD'])
def post_ap2(post_id):
return redirect(url_for('activitypub.post_ap', post_id=post_id))
@bp.route('/post/<int:post_id>', methods=['GET', 'HEAD', 'POST'])
def post_ap(post_id):
if (request.method == 'GET' or request.method == 'HEAD') and is_activitypub_request():
post = Post.query.get_or_404(post_id)
if request.method == 'GET':
post_data = post_to_page(post)
post_data['@context'] = default_context()
else: # HEAD request
post_data = []
resp = jsonify(post_data)
resp.content_type = 'application/activity+json'
resp.headers.set('Vary', 'Accept')
resp.headers.set('Link', f'<https://{current_app.config["SERVER_NAME"]}/post/{post.id}>; rel="alternate"; type="text/html"')
return resp
else:
return show_post(post_id)
@bp.route('/activities/<type>/<id>')
@cache.cached(timeout=600)
def activities_json(type, id):
activity = ActivityPubLog.query.filter_by(activity_id=f"https://{current_app.config['SERVER_NAME']}/activities/{type}/{id}").first()
if activity:
if activity.activity_json is not None:
activity_json = json.loads(activity.activity_json)
else:
activity_json = {}
resp = jsonify(activity_json)
resp.content_type = 'application/activity+json'
return resp
else:
abort(404)
# Other instances can query the result of their POST to the inbox by using this endpoint. The ID of the activity they
# sent (minus the https:// on the front) is the id parameter. e.g. https://piefed.ngrok.app/activity_result/piefed.ngrok.app/activities/announce/EfjyZ3BE5SzQK0C
@bp.route('/activity_result/<path:id>')
def activity_result(id):
activity = ActivityPubLog.query.filter_by(activity_id=f'https://{id}').first()
if activity:
if activity.result == 'success':
return jsonify('Ok')
else:
return jsonify({'error': activity.result, 'message': activity.exception_message})
else:
abort(404)
def process_new_content(user, community, store_ap_json, request_json, announced):
saved_json = request_json if store_ap_json else None
id = request_json['id']
if not announced:
in_reply_to = request_json['object']['inReplyTo'] if 'inReplyTo' in request_json['object'] else None
ap_id = request_json['object']['id']
announce_id = None
activity_json = request_json
else:
in_reply_to = request_json['object']['object']['inReplyTo'] if 'inReplyTo' in request_json['object']['object'] else None
ap_id = request_json['object']['object']['id']
announce_id = request_json['id']
activity_json = request_json['object']
if not in_reply_to: # Creating a new post
post = Post.query.filter_by(ap_id=ap_id).first()
if post:
if activity_json['type'] == 'Create':
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'Create processed after Update')
return
if user.id == post.user_id:
update_post_from_activity(post, activity_json)
log_incoming_ap(id, APLOG_UPDATE, APLOG_SUCCESS, saved_json)
if not announced:
announce_activity_to_followers(post.community, post.author, request_json)
return
else:
log_incoming_ap(id, APLOG_UPDATE, APLOG_FAILURE, saved_json, 'Edit attempt denied')
return
else:
if can_create_post(user, community):
try:
post = create_post(store_ap_json, community, activity_json, user, announce_id=announce_id)
if post:
log_incoming_ap(id, APLOG_CREATE, APLOG_SUCCESS, saved_json)
if not announced:
announce_activity_to_followers(community, user, request_json)
return
except TypeError as e:
current_app.logger.error('TypeError: ' + str(request_json))
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'TypeError. See log file.')
return
else:
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'User cannot create post in Community')
return
else: # Creating a reply / comment
reply = PostReply.query.filter_by(ap_id=ap_id).first()
if reply:
if activity_json['type'] == 'Create':
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'Create processed after Update')
return
if user.id == reply.user_id:
update_post_reply_from_activity(reply, activity_json)
log_incoming_ap(id, APLOG_UPDATE, APLOG_SUCCESS, saved_json)
if not announced:
announce_activity_to_followers(reply.community, reply.author, request_json)
return
else:
log_incoming_ap(id, APLOG_UPDATE, APLOG_FAILURE, saved_json, 'Edit attempt denied')
return
else:
if can_create_post_reply(user, community):
try:
reply = create_post_reply(store_ap_json, community, in_reply_to, activity_json, user, announce_id=announce_id)
if reply:
log_incoming_ap(id, APLOG_CREATE, APLOG_SUCCESS, saved_json)
if not announced:
announce_activity_to_followers(community, user, request_json)
return
except TypeError as e:
current_app.logger.error('TypeError: ' + str(request_json))
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'TypeError. See log file.')
return
else:
log_incoming_ap(id, APLOG_CREATE, APLOG_FAILURE, saved_json, 'User cannot create reply in Community')
return
def process_upvote(user, store_ap_json, request_json, announced):
saved_json = request_json if store_ap_json else None
id = request_json['id']
ap_id = request_json['object'] if not announced else request_json['object']['object']
if isinstance(ap_id, dict) and 'id' in ap_id:
ap_id = ap_id['id']
liked = find_liked_object(ap_id)
if liked is None:
log_incoming_ap(id, APLOG_LIKE, APLOG_FAILURE, saved_json, 'Unfound object ' + ap_id)
return
if can_upvote(user, liked.community):
if isinstance(liked, (Post, PostReply)):
liked.vote(user, 'upvote')
log_incoming_ap(id, APLOG_LIKE, APLOG_SUCCESS, saved_json)
if not announced:
announce_activity_to_followers(liked.community, user, request_json)
else:
log_incoming_ap(id, APLOG_LIKE, APLOG_IGNORED, saved_json, 'Cannot upvote this')
def process_downvote(user, store_ap_json, request_json, announced):
saved_json = request_json if store_ap_json else None
id = request_json['id']
ap_id = request_json['object'] if not announced else request_json['object']['object']
if isinstance(ap_id, dict) and 'id' in ap_id:
ap_id = ap_id['id']
liked = find_liked_object(ap_id)
if liked is None:
log_incoming_ap(id, APLOG_DISLIKE, APLOG_FAILURE, saved_json, 'Unfound object ' + ap_id)
return
if can_downvote(user, liked.community):
if isinstance(liked, (Post, PostReply)):
liked.vote(user, 'downvote')
log_incoming_ap(id, APLOG_DISLIKE, APLOG_SUCCESS, saved_json)
if not announced:
announce_activity_to_followers(liked.community, user, request_json)
else:
log_incoming_ap(id, APLOG_DISLIKE, APLOG_IGNORED, saved_json, 'Cannot downvote this')
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