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pyfedi/app/activitypub/routes.py
freamon 7dd8717aa7 apf part 17: Undo / Follow requests
2024-11-24 15:15:09 +00:00

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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, instance_blocked, 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, remove_data_from_banned_user, resolve_remote_post, \
inform_followers_of_post_update, comment_model_to_json, restore_post_or_comment, ban_local_user, unban_local_user, \
lock_post, log_incoming_ap, find_community_ap_id, site_ban_remove_data
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, markdown_to_html, html_to_text
@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
resp = jsonify(actor_data)
resp.content_type = 'application/activity+json'
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'
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 '', 400
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
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 if store_ap_json else None, 'Missing minimum expected fields in JSON')
return '', 400
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(request_json['id'], APLOG_ANNOUNCE, APLOG_IGNORED, request_json if store_ap_json else None, 'Intended for Mastodon')
else:
log_incoming_ap(request_json['id'], APLOG_ANNOUNCE, APLOG_FAILURE, request_json if store_ap_json else None, 'Missing minimum expected fields in JSON Announce object')
return '', 400
if object['actor'].startswith('https://' + current_app.config['SERVER_NAME']):
log_incoming_ap(object['id'], APLOG_DUPLICATE, APLOG_IGNORED, request_json if store_ap_json else None, 'Activity about local content which is already present')
return '', 400
redis_client = get_redis_connection()
if redis_client.exists(id): # Something is sending same activity multiple times, or Announcing as well as sending the same content
log_incoming_ap(id, APLOG_DUPLICATE, APLOG_IGNORED, request_json if store_ap_json else None, 'Unnecessary retry attempt')
return '', 400
redis_client.set(id, 1, ex=90) # Save the activity ID into redis, to avoid duplicate activities
# Ignore unutilised PeerTube activity
if request_json['actor'].endswith('accounts/peertube'):
log_incoming_ap(request_json['id'], APLOG_PT_VIEW, APLOG_IGNORED, request_json if store_ap_json else None, 'PeerTube View or CacheFile activity')
return ''
# Ignore delete requests from uses that do not already exist here
if request_json['type'] == 'Delete':
if (request_json['id'].endswith('#delete') or # Mastodon / PieFed
('object' in request_json and isinstance(request_json['object'], str) and request_json['actor'] == request_json['object'])): # Lemmy
actor = User.query.filter_by(ap_profile_id=request_json['actor'].lower()).first()
if not actor:
log_incoming_ap(request_json['id'], APLOG_DELETE, APLOG_IGNORED, request_json if store_ap_json else None, 'Does not exist here')
return '', 400
else:
actor.ap_fetched_at = utcnow() # use stored pubkey, don't try to re-fetch for next step (signature verification)
db.session.commit()
actor = find_actor_or_create(request_json['actor'])
if not actor:
actor_name = request_json['actor']
log_incoming_ap(request_json['id'], APLOG_NOTYPE, APLOG_FAILURE, request_json if store_ap_json else None, f'Actor could not be found 1: {actor_name}')
return '', 400
if actor.is_local(): # should be impossible (can be Announced back, but not sent without access to privkey)
log_incoming_ap(request_json['id'], APLOG_NOTYPE, APLOG_FAILURE, request_json if store_ap_json else None, 'ActivityPub activity from a local actor')
return '', 400
else:
actor.instance.last_seen = utcnow()
actor.instance.dormant = False
actor.instance.gone_forever = False
actor.instance.failures = 0
actor.instance.ip_address = ip_address()
db.session.commit()
try:
HttpSignature.verify_request(request, actor.public_key, skip_date=True)
except VerificationError as e:
if not 'signature' in request_json:
log_incoming_ap(request_json['id'], APLOG_NOTYPE, APLOG_FAILURE, request_json if store_ap_json else None, 'Could not verify HTTP signature: ' + str(e))
return '', 400
# HTTP sig will fail if a.gup.pe or PeerTube have bounced a request, so check LD sig instead
try:
LDSignature.verify_signature(request_json, actor.public_key)
except VerificationError as e:
log_incoming_ap(request_json['id'], APLOG_NOTYPE, APLOG_FAILURE, request_json if store_ap_json else None, 'Could not verify LD signature: ' + str(e))
return '', 400
# 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, repeating it here means that http signature will have been verified
if request_json['type'] == 'Delete':
if (request_json['id'].endswith('#delete') or # Mastodon / PieFed
('object' in request_json and isinstance(request_json['object'], str) and request_json['actor'] == request_json['object'])): # Lemmy
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=['GET', 'POST'])
def site_inbox():
return shared_inbox()
@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)
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(announce_id, APLOG_ANNOUNCE, APLOG_FAILURE, request_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(announce_id, APLOG_NOTYPE, APLOG_FAILURE, request_json, 'Actor was not a user')
return
user.last_seen = site.last_active = utcnow()
db.session.commit()
community = None # found as needed
# Follow: remote user wants to join/follow one of our users or communities
if request_json['type'] == 'Follow':
target_ap_id = request_json['object']
follow_id = request_json['id']
target = find_actor_or_create(target_ap_id, create_if_not_found=False)
if not target:
log_incoming_ap(request_json['id'], APLOG_FOLLOW, APLOG_FAILURE, request_json if store_ap_json else None, 'Could not find target of Follow')
return
if isinstance(target, Community):
community = target
reject_follow = False
if community.local_only:
log_incoming_ap(request_json['id'], APLOG_FOLLOW, APLOG_FAILURE, request_json if store_ap_json else None, '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(request_json['id'], APLOG_FOLLOW, APLOG_FAILURE, request_json if store_ap_json else None, '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)
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(request_json['id'], APLOG_FOLLOW, APLOG_SUCCESS, request_json if store_ap_json else None)
return
elif isinstance(target, User):
local_user = target
remote_user = user
if not local_user.is_local():
log_incoming_ap(request_json['id'], APLOG_FOLLOW, APLOG_FAILURE, request_json if store_ap_json else None, '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(request_json['id'], APLOG_FOLLOW, APLOG_SUCCESS, request_json if store_ap_json else None)
return
# Accept: remote server is accepting our previous follow request
if request_json['type'] == 'Accept':
user = None
if isinstance(request_json['object'], str): # a.gup.pe accepts using a string with the ID of the follow request
join_request_parts = request_json['object'].split('/')
join_request = CommunityJoinRequest.query.get(join_request_parts[-1])
if join_request:
user = User.query.get(join_request.user_id)
elif request_json['object']['type'] == 'Follow':
user_ap_id = request_json['object']['actor']
user = find_actor_or_create(user_ap_id, create_if_not_found=False)
if not user:
log_incoming_ap(request_json['id'], APLOG_ACCEPT, APLOG_FAILURE, request_json if store_ap_json else None, '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(request_json['id'], APLOG_ACCEPT, APLOG_SUCCESS, request_json if store_ap_json else None)
return
# Reject: remote server is rejecting our previous follow request
if request_json['type'] == 'Reject':
if request_json['object']['type'] == 'Follow':
user_ap_id = request_json['object']['actor']
user = find_actor_or_create(user_ap_id, create_if_not_found=False)
if not user:
log_incoming_ap(request_json['id'], APLOG_ACCEPT, APLOG_FAILURE, request_json if store_ap_json else None, '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(request_json['id'], APLOG_ACCEPT, APLOG_SUCCESS, request_json if store_ap_json else None)
return
# Create is new content. Update is often an edit, but Updates from Lemmy can also be new content
if request_json['type'] == 'Create' or request_json['type'] == 'Update':
if request_json['object']['type'] == 'ChatMessage':
sender = user
recipient_ap_id = request_json['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(request_json['id'], APLOG_CHATMESSAGE, APLOG_FAILURE, request_json if store_ap_json else None, 'Sender not eligible to send')
return
elif recipient.has_blocked_user(sender.id) or recipient.has_blocked_instance(sender.instance_id):
log_incoming_ap(request_json['id'], APLOG_CHATMESSAGE, APLOG_FAILURE, request_json if store_ap_json else None, '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 = request_json['object']['encrypted'] if 'encrypted' in request_json['object'] else None
new_message = ChatMessage(sender_id=sender.id, recipient_id=recipient.id, conversation_id=existing_conversation.id,
body_html=request_json['object']['content'],
body=html_to_text(request_json['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(request_json['id'], APLOG_CHATMESSAGE, APLOG_SUCCESS, request_json if store_ap_json else None)
return
# inner object of Create is not a ChatMessage
else:
if (request_json['object']['type'] == 'Note' and 'name' in request_json['object'] and # Poll Votes
'inReplyTo' in request_json['object'] and 'attributedTo' in request_json['object']):
post_being_replied_to = Post.query.filter_by(ap_id=request_json['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=request_json['object']['name']).first()
if poll_data and choice:
poll_data.vote_for_choice(choice.id, user.id)
db.session.commit()
log_incoming_ap(request_json['id'], APLOG_CREATE, APLOG_SUCCESS, request_json if store_ap_json else None)
if post_being_replied_to.author.is_local():
inform_followers_of_post_update(post_being_replied_to.id, user.instance_id)
return
community_ap_id = find_community_ap_id(request_json)
if not ensure_domains_match(request_json['object']):
log_incoming_ap(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'Domains do not match')
return
community = find_actor_or_create(community_ap_id, community_only=True, create_if_not_found=False) if community_ap_id else None
if community and community.local_only:
log_incoming_ap(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'Remote Create in local_only community')
return
if not community:
log_incoming_ap(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'Blocked or unfound community')
return
object_type = request_json['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=False)
return
elif object_type == 'Video': # PeerTube: editing a video (PT doesn't Announce these)
post = Post.query.filter_by(ap_id=request_json['object']['id']).first()
if post:
if user.id == post.user_id:
update_post_from_activity(post, request_json)
log_incoming_ap(request_json['id'], APLOG_UPDATE, APLOG_SUCCESS, request_json if store_ap_json else None)
return
else:
log_incoming_ap(request_json['id'], APLOG_UPDATE, APLOG_FAILURE, request_json if store_ap_json else None, 'Edit attempt denied')
return
else:
log_incoming_ap(request_json['id'], APLOG_UPDATE, APLOG_FAILURE, request_json if store_ap_json else None, 'PeerTube post not found')
return
else:
log_incoming_ap(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'Unacceptable type (create): ' + object_type)
return
if request_json['type'] == 'Delete':
if isinstance(request_json['object'], str):
ap_id = request_json['object'] # lemmy
else:
ap_id = request_json['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(request_json['id'], APLOG_DELETE, APLOG_IGNORED, request_json if store_ap_json else None, 'Activity about local content which is already deleted')
else:
delete_post_or_comment(user, to_delete, store_ap_json, request_json)
announce_activity_to_followers(to_delete.community, user, request_json)
else:
log_incoming_ap(request_json['id'], APLOG_DELETE, APLOG_FAILURE, request_json if store_ap_json else None, 'Delete: cannot find ' + ap_id)
return
if request_json['type'] == 'Like' or request_json['type'] == 'EmojiReact': # Upvote
process_upvote(user, store_ap_json, request_json, announced=False)
return
if request_json['type'] == 'Dislike': # Downvote
if site.enable_downvotes is False:
log_incoming_ap(request_json['id'], APLOG_DISLIKE, APLOG_IGNORED, request_json if store_ap_json else None, 'Dislike ignored because of allow_dislike setting')
return
process_downvote(user, store_ap_json, request_json, announced=False)
return
if request_json['type'] == 'Flag': # Reported content
reported = find_reported_object(request_json['object'])
if reported:
process_report(user, reported, request_json)
log_incoming_ap(request_json['id'], APLOG_REPORT, APLOG_SUCCESS, request_json if store_ap_json else None)
announce_activity_to_followers(reported.community, user, request_json)
else:
log_incoming_ap(request_json['id'], APLOG_REPORT, APLOG_IGNORED, request_json if store_ap_json else None, 'Report ignored due to missing content')
return
if request_json['type'] == 'Block': # remote site is banning one of their users
blocker = user
blocked_ap_id = request_json['object'].lower()
blocked = User.query.filter_by(ap_profile_id=blocked_ap_id).first()
if store_ap_json:
request_json['cc'] = [] # cut very long list of instances
if not blocked:
log_incoming_ap(request_json['id'], APLOG_USERBAN, APLOG_IGNORED, request_json if store_ap_json else None, 'Does not exist here')
return
block_from_ap_id = request_json['target']
remove_data = request_json['removeData'] if 'removeData' in request_json else False
# Lemmy currently only sends userbans for admins banning local users
# Banning remote users is hacked by banning them from every community of which they are a part
# There's plans to change this in the future though.
if not blocker.is_instance_admin() and not blocked.instance_id == blocker.instance_id:
log_incoming_ap(request_json['id'], APLOG_USERBAN, APLOG_FAILURE, request_json if store_ap_json else None, 'Does not have permission')
return
# request_json includes 'expires' and 'endTime' (same thing) but nowhere to record this and check in future for end in ban.
if remove_data == True:
site_ban_remove_data(blocker.id, blocked)
log_incoming_ap(request_json['id'], APLOG_USERBAN, APLOG_SUCCESS, request_json if store_ap_json else None)
else:
#blocked.banned = True # uncommented until there's a mechanism for processing ban expiry date
#db.session.commit()
log_incoming_ap(request_json['id'], APLOG_USERBAN, APLOG_IGNORED, request_json if store_ap_json else None, 'Banned, but content retained')
return
if request_json['type'] == 'Undo':
if request_json['object']['type'] == 'Follow': # Unsubscribe from a community or user
target_ap_id = request_json['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(request_json['id'], APLOG_UNDO_FOLLOW, APLOG_SUCCESS, request_json if store_ap_json else None)
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(request_json['id'], APLOG_UNDO_FOLLOW, APLOG_SUCCESS, request_json if store_ap_json else None)
return
if not target:
log_incoming_ap(request_json['id'], APLOG_UNDO_FOLLOW, APLOG_FAILURE, request_json if store_ap_json else None, 'Unfound target')
return
# -- below this point is code that will be incrementally replaced to use log_incoming_ap() instead --
# save all incoming data to aid in debugging and development. Set result to 'success' if things go well
activity_log = ActivityPubLog(direction='in', result='failure')
if 'id' in request_json:
activity_log.activity_id = request_json['id']
if site.log_activitypub_json:
activity_log.activity_json = json.dumps(request_json)
activity_log.result = 'processing'
db.session.add(activity_log)
db.session.commit()
if 'type' in request_json:
activity_log.activity_type = request_json['type']
if not instance_blocked(request_json['id']):
# Create is new content. Update is often an edit, but Updates from Lemmy can also be new content
if request_json['type'] == 'Create' or request_json['type'] == 'Update':
activity_log.activity_type = 'Create'
user_ap_id = request_json['object']['attributedTo'] if 'attributedTo' in request_json['object'] and isinstance(request_json['object']['attributedTo'], str) else None
if user_ap_id is None: # if there is no attributedTo, fall back to the actor on the parent object
user_ap_id = request_json['actor'] if 'actor' in request_json and isinstance(request_json['actor'], str) else None
if request_json['object']['type'] == 'ChatMessage':
activity_log.activity_type = 'Create ChatMessage'
sender = find_actor_or_create(user_ap_id)
recipient_ap_id = request_json['object']['to'][0]
recipient = find_actor_or_create(recipient_ap_id)
if sender and recipient and recipient.is_local():
if sender.created_recently() or sender.reputation <= -10:
activity_log.exception_message = "Sender not eligible to send"
elif recipient.has_blocked_user(sender.id) or recipient.has_blocked_instance(sender.instance_id):
activity_log.exception_message = "Sender blocked by recipient"
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 = request_json['object']['encrypted'] if 'encrypted' in request_json['object'] else None
new_message = ChatMessage(sender_id=sender.id, recipient_id=recipient.id, conversation_id=existing_conversation.id,
body=request_json['object']['source']['content'],
body_html=markdown_to_html(request_json['object']['source']['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()
activity_log.result = 'success'
else:
try:
community_ap_id = ''
locations = ['audience', 'cc', 'to']
if 'object' in request_json:
rjs = [request_json, request_json['object']]
else:
rjs = [request_json]
followers_suffix = '/followers'
for rj in rjs:
for location in locations:
if location in rj:
potential_id = rj[location]
if isinstance(potential_id, str):
if not potential_id.startswith('https://www.w3.org') and not potential_id.endswith(followers_suffix):
community_ap_id = potential_id
if isinstance(potential_id, list):
for c in potential_id:
if not c.startswith('https://www.w3.org') and not c.endswith(followers_suffix):
community_ap_id = c
break
if community_ap_id:
break
if community_ap_id:
break
if not community_ap_id and 'object' in request_json and \
'inReplyTo' in request_json['object'] and request_json['object']['inReplyTo'] is not None:
post_being_replied_to = Post.query.filter_by(ap_id=request_json['object']['inReplyTo']).first()
if post_being_replied_to:
community_ap_id = post_being_replied_to.community.ap_profile_id
else:
comment_being_replied_to = PostReply.query.filter_by(ap_id=request_json['object']['inReplyTo']).first()
if comment_being_replied_to:
community_ap_id = comment_being_replied_to.community.ap_profile_id
if not community_ap_id and 'object' in request_json and request_json['object']['type'] == 'Video': # PeerTube
if 'attributedTo' in request_json['object'] and isinstance(request_json['object']['attributedTo'], list):
for a in request_json['object']['attributedTo']:
if a['type'] == 'Group':
community_ap_id = a['id']
if a['type'] == 'Person':
user_ap_id = a['id']
if not community_ap_id:
activity_log.result = 'failure'
activity_log.exception_message = 'Unable to extract community'
db.session.commit()
return
except:
activity_log.activity_type = 'exception'
db.session.commit()
return
if 'object' in request_json:
if not ensure_domains_match(request_json['object']):
activity_log.result = 'failure'
activity_log.exception_message = 'Domains do not match'
db.session.commit()
return
community = find_actor_or_create(community_ap_id, community_only=True)
if community and community.local_only:
activity_log.exception_message = 'Remote Create in local_only community'
activity_log.result = 'ignored'
db.session.commit()
return
user = find_actor_or_create(user_ap_id)
if user and not user.is_local():
if community:
user.last_seen = community.last_active = site.last_active = utcnow()
else:
user.last_seen = site.last_active = utcnow()
object_type = request_json['object']['type']
new_content_types = ['Page', 'Article', 'Link', 'Note', 'Question']
if object_type in new_content_types: # create or update a post
in_reply_to = request_json['object']['inReplyTo'] if 'inReplyTo' in request_json['object'] else None
if not in_reply_to: # Creating a new post
post = Post.query.filter_by(ap_id=request_json['object']['id']).first()
if post:
if request_json['type'] == 'Create':
activity_log.result = 'ignored'
activity_log.exception_message = 'Create received for already known object'
db.session.commit()
return
else:
activity_log.activity_type = 'Update'
if can_edit(request_json['actor'], post):
update_post_from_activity(post, request_json)
announce_activity_to_followers(post.community, post.author, request_json)
activity_log.result = 'success'
else:
activity_log.exception_message = 'Edit attempt denied'
else:
if can_create_post(user, community):
try:
post = create_post(activity_log, community, request_json, user)
if post:
announce_activity_to_followers(community, user, request_json)
activity_log.result = 'success'
except TypeError as e:
activity_log.exception_message = 'TypeError. See log file.'
current_app.logger.error('TypeError: ' + str(request_json))
post = None
else:
post = None
else: # Creating a reply / comment
reply = PostReply.query.filter_by(ap_id=request_json['object']['id']).first()
if reply:
if request_json['type'] == 'Create':
activity_log.result = 'ignored'
activity_log.exception_message = 'Create received for already known object'
db.session.commit()
return
else:
activity_log.activity_type = 'Update'
if can_edit(request_json['actor'], reply):
update_post_reply_from_activity(reply, request_json)
announce_activity_to_followers(reply.community, reply.author, request_json)
activity_log.result = 'success'
else:
activity_log.exception_message = 'Edit attempt denied'
else:
if community is None: # Mastodon: replies do not specify the community they're in. Attempt to find out the community by looking at the parent object
parent_post_id, parent_comment_id, _ = find_reply_parent(in_reply_to)
if parent_comment_id:
community = PostReply.query.get(parent_comment_id).community
elif parent_post_id:
community = Post.query.get(parent_post_id).community
if can_create_post_reply(user, community):
try:
post_reply = create_post_reply(activity_log, community, in_reply_to, request_json, user)
if post_reply:
announce_activity_to_followers(community, user, request_json)
except TypeError as e:
activity_log.exception_message = 'TypeError. See log file.'
current_app.logger.error('TypeError: ' + str(request_json))
post = None
else:
post = None
elif object_type == 'Video': # PeerTube: editing a video (PT doesn't seem to Announce these)
post = Post.query.filter_by(ap_id=request_json['object']['id']).first()
activity_log.activity_type = 'Update'
if post:
if can_edit(request_json['actor'], post):
update_post_from_activity(post, request_json)
activity_log.result = 'success'
else:
activity_log.exception_message = 'Edit attempt denied'
else:
activity_log.exception_message = 'Post not found'
else:
activity_log.exception_message = 'Unacceptable type (create): ' + object_type
else:
if user is None or community is None:
activity_log.exception_message = 'Blocked or unfound user or community'
if user and user.is_local():
activity_log.exception_message = 'Activity about local content which is already present'
activity_log.result = 'ignored'
# Announce is new content and votes that happened on a remote server.
if request_json['type'] == 'Announce':
if isinstance(request_json['object'], str): # Mastodon, PeerTube, A.gup.pe
activity_log.activity_json = json.dumps(request_json)
activity_log.exception_message = 'invalid json?'
if 'actor' in request_json:
community = find_actor_or_create(request_json['actor'], community_only=True, create_if_not_found=False)
if community:
post = resolve_remote_post(request_json['object'], community.id, request_json['actor'])
elif request_json['object']['type'] == 'Create' or request_json['object']['type'] == 'Update':
activity_log.activity_type = request_json['object']['type']
if 'object' in request_json and 'object' in request_json['object']:
if not ensure_domains_match(request_json['object']['object']):
activity_log.exception_message = 'Domains do not match'
activity_log.result = 'failure'
db.session.commit()
return
user_ap_id = request_json['object']['object']['attributedTo']
try:
community_ap_id = request_json['object']['audience'] if 'audience' in request_json['object'] else request_json['actor']
except KeyError:
activity_log.activity_type = 'exception'
db.session.commit()
return
community = find_actor_or_create(community_ap_id, community_only=True)
user = find_actor_or_create(user_ap_id)
if (user and not user.is_local()) and community:
user.last_seen = community.last_active = site.last_active = utcnow()
object_type = request_json['object']['object']['type']
new_content_types = ['Page', 'Article', 'Link', 'Note']
if object_type in new_content_types: # create a new post
in_reply_to = request_json['object']['object']['inReplyTo'] if 'inReplyTo' in \
request_json['object']['object'] else None
if not in_reply_to:
post = Post.query.filter_by(ap_id=request_json['object']['object']['id']).first()
if post:
if request_json['object']['type'] == 'Create':
activity_log.result = 'ignored'
activity_log.exception_message = 'Create received for already known object'
db.session.commit()
return
else:
try:
update_post_from_activity(post, request_json['object'])
except KeyError:
activity_log.result = 'exception'
db.session.commit()
return
activity_log.result = 'success'
else: # activity was a Create, or an Update sent instead of a Create
if can_create_post(user, community):
post = create_post(activity_log, community, request_json['object'], user, announce_id=request_json['id'])
else:
post = None
else:
reply = PostReply.query.filter_by(ap_id=request_json['object']['object']['id']).first()
if reply:
if request_json['object']['type'] == 'Create':
activity_log.result = 'ignored'
activity_log.exception_message = 'Create received for already known object'
db.session.commit()
return
else:
try:
update_post_reply_from_activity(reply, request_json['object'])
except KeyError:
activity_log.result = 'exception'
db.session.commit()
return
activity_log.result = 'success'
else: # activity was a Create, or an Update sent instead of a Create
if can_create_post_reply(user, community):
post = create_post_reply(activity_log, community, in_reply_to, request_json['object'], user, announce_id=request_json['id'])
else:
post = None
else:
activity_log.exception_message = 'Unacceptable type: ' + object_type
else:
if user is None or community is None:
activity_log.exception_message = 'Blocked or unfound user or community'
if user and user.is_local():
activity_log.exception_message = 'Activity about local content which is already present'
activity_log.result = 'ignored'
elif request_json['object']['type'] == 'Like' or request_json['object']['type'] == 'EmojiReact':
activity_log.activity_type = request_json['object']['type']
user_ap_id = request_json['object']['actor']
liked_ap_id = request_json['object']['object']
user = find_actor_or_create(user_ap_id)
liked = find_liked_object(liked_ap_id)
if user is None:
activity_log.exception_message = 'Blocked or unfound user'
elif liked is None:
activity_log.exception_message = 'Unfound object ' + liked_ap_id
elif user.is_local():
activity_log.exception_message = 'Activity about local content which is already present'
activity_log.result = 'ignored'
elif can_upvote(user, liked.community):
# insert into voted table
if liked is None:
activity_log.exception_message = 'Liked object not found'
elif liked is not None and isinstance(liked, (Post, PostReply)):
liked.vote(user, 'upvote')
activity_log.result = 'success'
else:
activity_log.exception_message = 'Could not detect type of like'
else:
activity_log.exception_message = 'Cannot upvote this'
activity_log.result = 'ignored'
elif request_json['object']['type'] == 'Dislike':
activity_log.activity_type = request_json['object']['type']
if site.enable_downvotes is False:
activity_log.exception_message = 'Dislike ignored because of allow_dislike setting'
else:
user_ap_id = request_json['object']['actor']
liked_ap_id = request_json['object']['object']
user = find_actor_or_create(user_ap_id)
disliked = find_liked_object(liked_ap_id)
if user is None:
activity_log.exception_message = 'Blocked or unfound user'
elif disliked is None:
activity_log.exception_message = 'Unfound object ' + liked_ap_id
elif user.is_local():
activity_log.exception_message = 'Activity about local content which is already present'
activity_log.result = 'ignored'
elif can_downvote(user, disliked.community, site):
# insert into voted table
if disliked is None:
activity_log.exception_message = 'Liked object not found'
elif isinstance(disliked, (Post, PostReply)):
disliked.vote(user, 'downvote')
activity_log.result = 'success'
# todo: recalculate 'hotness' of liked post/reply
else:
activity_log.exception_message = 'Could not detect type of like'
else:
activity_log.exception_message = 'Cannot downvote this'
activity_log.result = 'ignored'
elif request_json['object']['type'] == 'Delete':
activity_log.activity_type = request_json['object']['type']
user_ap_id = request_json['object']['actor']
to_be_deleted_ap_id = request_json['object']['object']
if isinstance(to_be_deleted_ap_id, dict):
activity_log.result = 'failure'
activity_log.exception_message = 'dict instead of string ' + str(to_be_deleted_ap_id)
else:
delete_post_or_comment(user_ap_id, to_be_deleted_ap_id, activity_log.id)
elif request_json['object']['type'] == 'Page': # Sent for Mastodon's benefit
activity_log.result = 'ignored'
activity_log.exception_message = 'Intended for Mastodon'
elif request_json['object']['type'] == 'Note': # Never sent?
activity_log.result = 'ignored'
activity_log.exception_message = 'Intended for Mastodon'
elif request_json['object']['type'] == 'Undo':
if request_json['object']['object']['type'] == 'Like' or request_json['object']['object']['type'] == 'Dislike':
activity_log.activity_type = request_json['object']['object']['type']
user_ap_id = request_json['object']['actor']
user = find_actor_or_create(user_ap_id)
post = None
comment = None
target_ap_id = request_json['object']['object']['object'] # object object object!
post = undo_vote(activity_log, comment, post, target_ap_id, user)
elif request_json['object']['object']['type'] == 'Delete':
if 'object' in request_json and 'object' in request_json['object']:
restore_post_or_comment(request_json['object']['object'], activity_log.id)
elif request_json['object']['object']['type'] == 'Block':
activity_log.activity_type = 'Undo User Ban'
deletor_ap_id = request_json['object']['object']['actor']
user_ap_id = request_json['object']['object']['object']
target = request_json['object']['object']['target']
if target == request_json['actor'] and user_ap_id.startswith('https://' + current_app.config['SERVER_NAME']):
unban_local_user(deletor_ap_id, user_ap_id, target)
activity_log.result = 'success'
elif request_json['object']['object']['type'] == 'Lock' and 'object' in request_json['object']['object']:
activity_log.activity_type = 'Post Unlock'
mod_ap_id = request_json['object']['object']['actor']
post_id = request_json['object']['object']['object']
lock_post(mod_ap_id, post_id, True)
activity_log.result = 'success'
elif request_json['object']['type'] == 'Add' and 'target' in request_json['object']:
activity_log.activity_type = request_json['object']['type']
target = request_json['object']['target']
community = Community.query.filter_by(ap_public_url=request_json['actor']).first()
if community:
featured_url = community.ap_featured_url
moderators_url = community.ap_moderators_url
if target == featured_url:
post = Post.query.filter_by(ap_id=request_json['object']['object']).first()
if post:
post.sticky = True
activity_log.result = 'success'
if target == moderators_url:
user = find_actor_or_create(request_json['object']['object'])
if user:
existing_membership = CommunityMember.query.filter_by(community_id=community.id, user_id=user.id).first()
if existing_membership:
existing_membership.is_moderator = True
else:
new_membership = CommunityMember(community_id=community.id, user_id=user.id, is_moderator=True)
db.session.add(new_membership)
db.session.commit()
activity_log.result = 'success'
elif request_json['object']['type'] == 'Remove' and 'target' in request_json['object']:
activity_log.activity_type = request_json['object']['type']
target = request_json['object']['target']
community = Community.query.filter_by(ap_public_url=request_json['actor']).first()
if community:
featured_url = community.ap_featured_url
moderators_url = community.ap_moderators_url
if target == featured_url:
post = Post.query.filter_by(ap_id=request_json['object']['object']).first()
if post:
post.sticky = False
activity_log.result = 'success'
if target == moderators_url:
user = find_actor_or_create(request_json['object']['object'], create_if_not_found=False)
if user:
existing_membership = CommunityMember.query.filter_by(community_id=community.id, user_id=user.id).first()
if existing_membership:
existing_membership.is_moderator = False
activity_log.result = 'success'
elif request_json['object']['type'] == 'Block' and 'target' in request_json['object']:
activity_log.activity_type = 'User Ban'
deletor_ap_id = request_json['object']['actor']
user_ap_id = request_json['object']['object']
target = request_json['object']['target']
remove_data = request_json['object']['removeData']
if target == request_json['actor']:
if remove_data == True:
remove_data_from_banned_user(deletor_ap_id, user_ap_id, target)
if user_ap_id.startswith('https://' + current_app.config['SERVER_NAME']):
ban_local_user(deletor_ap_id, user_ap_id, target, request_json['object'])
activity_log.result = 'success'
elif request_json['object']['type'] == 'Lock' and 'object' in request_json['object']:
activity_log.activity_type = 'Post Lock'
mod_ap_id = request_json['object']['actor']
post_id = request_json['object']['object']
lock_post(mod_ap_id, post_id, False)
activity_log.result = 'success'
else:
activity_log.exception_message = 'Invalid type for Announce'
# Follow: remote user wants to join/follow one of our communities
elif request_json['type'] == 'Follow': # Follow is when someone wants to join a community
user_ap_id = request_json['actor']
community_ap_id = request_json['object']
follow_id = request_json['id']
user = find_actor_or_create(user_ap_id)
community = find_actor_or_create(community_ap_id, community_only=True)
if isinstance(community, Community):
if community and community.local_only and user:
activity_log.exception_message = 'Local only cannot be followed by remote users'
# 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)
}
# Lemmy doesn't yet understand Reject/Follow, so send without worrying about response for now.
post_request(user.ap_inbox_url, reject, community.private_key, f"{community.public_url()}#main-key")
else:
if user is not None and community is not None:
# check if user is banned from this community
banned = CommunityBan.query.filter_by(user_id=user.id, community_id=community.id).first()
if banned is None:
user.last_seen = utcnow()
if community_membership(user, community) != SUBSCRIPTION_MEMBER:
member = CommunityMember(user_id=user.id, community_id=community.id)
db.session.add(member)
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)
}
if post_request(user.ap_inbox_url, accept, community.private_key, f"{community.public_url()}#main-key") is True:
activity_log.result = 'success'
else:
activity_log.exception_message = 'Error sending Accept'
else:
activity_log.exception_message = 'user is banned from this community'
elif isinstance(community, User): # Pixelfed sends follow requests to the shared inbox, not the user inbox...
if current_app.debug:
process_user_follow_request(request_json, activity_log.id, user.id)
else:
process_user_follow_request.delay(request_json, activity_log.id, user.id)
# Accept: remote server is accepting our previous follow request
elif request_json['type'] == 'Accept':
if isinstance(request_json['object'], str): # a.gup.pe accepts using a string with the ID of the follow request
join_request_parts = request_json['object'].split('/')
join_request = CommunityJoinRequest.query.get(join_request_parts[-1])
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.query.get(join_request.user_id), Community.query.get(join_request.community_id))
activity_log.result = 'success'
elif request_json['object']['type'] == 'Follow':
community_ap_id = request_json['actor']
user_ap_id = request_json['object']['actor']
user = find_actor_or_create(user_ap_id)
community = find_actor_or_create(community_ap_id, community_only=True)
if user and community:
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=user.id, community_id=community.id).first()
if not existing_membership:
member = CommunityMember(user_id=user.id, community_id=community.id)
db.session.add(member)
community.subscriptions_count += 1
db.session.commit()
activity_log.result = 'success'
cache.delete_memoized(community_membership, user, community)
elif request_json['type'] == 'Undo':
if request_json['object']['type'] == 'Follow': # Unsubscribe from a community
community_ap_id = request_json['object']['object']
user_ap_id = request_json['object']['actor']
user = find_actor_or_create(user_ap_id)
community = find_actor_or_create(community_ap_id, community_only=True)
if user and community:
user.last_seen = utcnow()
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)
activity_log.result = 'success'
elif request_json['object']['type'] == 'Like': # Undoing an upvote or downvote
activity_log.activity_type = request_json['object']['type']
user_ap_id = request_json['actor']
user = find_actor_or_create(user_ap_id)
post = None
comment = None
target_ap_id = request_json['object']['object']
post_or_comment = undo_vote(activity_log, comment, post, target_ap_id, user)
if post_or_comment:
announce_activity_to_followers(post_or_comment.community, user, request_json)
activity_log.result = 'success'
elif request_json['object']['type'] == 'Dislike': # Undoing a downvote - probably unused
activity_log.activity_type = request_json['object']['type']
user_ap_id = request_json['actor']
user = find_actor_or_create(user_ap_id)
post = None
comment = None
target_ap_id = request_json['object']['object']
post_or_comment = undo_downvote(activity_log, comment, post, target_ap_id, user)
if post_or_comment:
announce_activity_to_followers(post_or_comment.community, user, request_json)
activity_log.result = 'success'
elif request_json['object']['type'] == 'Block': # Undoing a ban
activity_log.activity_type = 'Undo User Ban'
deletor_ap_id = request_json['object']['actor']
user_ap_id = request_json['object']['object']
target = request_json['object']['target']
if user_ap_id.startswith('https://' + current_app.config['SERVER_NAME']):
unban_local_user(deletor_ap_id, user_ap_id, target)
activity_log.result = 'success'
elif request_json['object']['type'] == 'Delete': # undoing a delete
activity_log.activity_type = 'Restore'
post = Post.query.filter_by(ap_id=request_json['object']['object']).first()
if post:
deletor = find_actor_or_create(request_json['object']['actor'], create_if_not_found=False)
if deletor:
if post.author.id == deletor.id or post.community.is_moderator(deletor) or post.community.is_instance_admin(deletor):
post.deleted = False
post.deleted_by = None
post.author.post_count += 1
post.community.post_count += 1
announce_activity_to_followers(post.community, post.author, request_json)
db.session.commit()
activity_log.result = 'success'
else:
activity_log.exception_message = 'Restore attempt denied'
else:
activity_log.exception_message = 'Restorer did not already exist'
else:
reply = PostReply.query.filter_by(ap_id=request_json['object']['object']).first()
if reply:
deletor = find_actor_or_create(request_json['object']['actor'], create_if_not_found=False)
if deletor:
if reply.author.id == deletor.id or reply.community.is_moderator(deletor) or reply.community.is_instance_admin(deletor):
reply.deleted = False
reply.deleted_by = None
if not reply.author.bot:
reply.post.reply_count += 1
reply.author.post_reply_count += 1
announce_activity_to_followers(reply.community, reply.author, request_json)
db.session.commit()
activity_log.result = 'success'
else:
activity_log.exception_message = 'Restore attempt denied'
else:
activity_log.exception_message = 'Restorer did not already exist'
else:
activity_log.exception_message = 'Object not found, or object was not a post or a reply'
elif request_json['type'] == 'Delete':
if isinstance(request_json['object'], str):
ap_id = request_json['object'] # lemmy
else:
ap_id = request_json['object']['id'] # kbin
post = Post.query.filter_by(ap_id=ap_id).first()
# Delete post
if post:
deletor = find_actor_or_create(request_json['actor'], create_if_not_found=False)
if deletor:
if post.author.id == deletor.id or post.community.is_moderator(deletor) or post.community.is_instance_admin(deletor):
post.deleted = True
post.delted_by = deletor.id
post.author.post_count -= 1
post.community.post_count -= 1
if post.url and post.cross_posts is not None:
old_cross_posts = Post.query.filter(Post.id.in_(post.cross_posts)).all()
post.cross_posts.clear()
for ocp in old_cross_posts:
if ocp.cross_posts is not None:
ocp.cross_posts.remove(post.id)
announce_activity_to_followers(post.community, post.author, request_json)
db.session.commit()
activity_log.result = 'success'
else:
activity_log.exception_message = 'Delete attempt denied'
else:
activity_log.exception_message = 'Deletor did not already exist'
else:
# Delete PostReply
reply = PostReply.query.filter_by(ap_id=ap_id).first()
if reply:
deletor = find_actor_or_create(request_json['actor'], create_if_not_found=False)
if deletor:
if reply.author.id == deletor.id or reply.community.is_moderator(deletor) or reply.community.is_instance_admin(deletor):
reply.deleted = True
reply.deleted_by = deletor.id
if not reply.author.bot:
reply.post.reply_count -= 1
reply.author.post_reply_count -= 1
announce_activity_to_followers(reply.community, reply.author, request_json)
db.session.commit()
activity_log.result = 'success'
else:
activity_log.exception_message = 'Delete attempt denied'
else:
activity_log.exception_message = 'Deletor did not already exist'
else:
# Delete User
user = find_actor_or_create(ap_id, create_if_not_found=False)
if user:
user.deleted = True
user.delete_dependencies()
db.session.commit()
activity_log.result = 'success'
else:
activity_log.exception_message = 'Delete: cannot find ' + ap_id
elif request_json['type'] == 'Like' or request_json['type'] == 'EmojiReact': # Upvote
activity_log.activity_type = request_json['type']
user_ap_id = request_json['actor']
user = find_actor_or_create(user_ap_id)
liked = find_liked_object(request_json['object'])
if user is None:
activity_log.exception_message = 'Blocked or unfound user'
elif liked is None:
activity_log.exception_message = 'Unfound object ' + request_json['object']
elif user.is_local():
activity_log.exception_message = 'Activity about local content which is already present'
activity_log.result = 'ignored'
elif can_upvote(user, liked.community):
# insert into voted table
if liked is None:
activity_log.exception_message = 'Liked object not found'
elif liked is not None and isinstance(liked, (Post, PostReply)):
liked.vote(user, 'upvote')
activity_log.result = 'success'
else:
activity_log.exception_message = 'Could not detect type of like'
if activity_log.result == 'success':
announce_activity_to_followers(liked.community, user, request_json)
else:
activity_log.exception_message = 'Cannot upvote this'
activity_log.result = 'ignored'
elif request_json['type'] == 'Dislike': # Downvote
if get_setting('allow_dislike', True) is False:
activity_log.exception_message = 'Dislike ignored because of allow_dislike setting'
else:
activity_log.activity_type = request_json['type']
user_ap_id = request_json['actor']
user = find_actor_or_create(user_ap_id)
target_ap_id = request_json['object']
disliked = find_liked_object(target_ap_id)
if user is None:
activity_log.exception_message = 'Blocked or unfound user'
elif disliked is None:
activity_log.exception_message = 'Unfound object' + target_ap_id
elif user.is_local():
activity_log.exception_message = 'Activity about local content which is already present'
activity_log.result = 'ignored'
elif can_downvote(user, disliked.community, site):
# insert into voted table
if disliked is None:
activity_log.exception_message = 'Liked object not found'
elif isinstance(disliked, (Post, PostReply)):
disliked.vote(user, 'downvote')
activity_log.result = 'success'
else:
activity_log.exception_message = 'Could not detect type of like'
if activity_log.result == 'success':
announce_activity_to_followers(disliked.community, user, request_json)
else:
activity_log.exception_message = 'Cannot downvote this'
activity_log.result = 'ignored'
elif request_json['type'] == 'Flag': # Reported content
activity_log.activity_type = 'Report'
user_ap_id = request_json['actor']
user = find_actor_or_create(user_ap_id)
target_ap_id = request_json['object']
reported = find_reported_object(target_ap_id)
if user and reported:
process_report(user, reported, request_json, activity_log)
announce_activity_to_followers(reported.community, user, request_json)
activity_log.result = 'success'
else:
activity_log.exception_message = 'Report ignored due to missing user or content'
elif request_json['type'] == 'Block':
activity_log.activity_type = 'User Ban'
deletor_ap_id = request_json['actor']
user_ap_id = request_json['object']
target = request_json['target']
remove_data = request_json['removeData']
if remove_data == True:
remove_data_from_banned_user(deletor_ap_id, user_ap_id, target)
if user_ap_id.startswith('https://' + current_app.config['SERVER_NAME']):
ban_local_user(deletor_ap_id, user_ap_id, target, request_json)
activity_log.result = 'success'
# Flush the caches of any major object that was created. To be sure.
if 'user' in vars() and user is not None:
if user.instance_id and user.instance_id != 1:
user.instance.last_seen = utcnow()
# user.instance.ip_address = ip_address
user.instance.dormant = False
user.instance.gone_forever = False
user.instance.failures = 0
else:
activity_log.exception_message = 'Instance blocked'
if activity_log.exception_message is not None and activity_log.result == 'processing':
activity_log.result = 'failure'
# Don't log successful json - save space
if site.log_activitypub_json and activity_log.result == 'success' and not current_app.debug:
activity_log.activity_json = ''
db.session.commit()
@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)
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(request_json['id'], APLOG_DELETE, APLOG_SUCCESS, request_json if store_ap_json else None)
else:
log_incoming_ap(request_json['id'], APLOG_DELETE, APLOG_FAILURE, request_json if store_ap_json else None, 'User not actually deleted.')
# TODO: process self-undeletes from Lemmy
# 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_blocked(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('/u/<actor>/inbox', methods=['POST'])
def user_inbox(actor):
site = Site.query.get(1)
activity_log = ActivityPubLog(direction='in', result='failure')
activity_log.result = 'processing'
db.session.add(activity_log)
db.session.commit()
try:
request_json = request.get_json(force=True)
except werkzeug.exceptions.BadRequest as e:
activity_log.exception_message = 'Unable to parse json body: ' + e.description
activity_log.result = 'failure'
db.session.commit()
return '', 400
if 'id' in request_json:
activity_log.activity_id = request_json['id']
if site.log_activitypub_json:
activity_log.activity_json = json.dumps(request_json)
actor = find_actor_or_create(request_json['actor'], signed_get=True) if 'actor' in request_json else None
if actor is not None:
if (('type' in request_json and request_json['type'] == 'Like') or
('type' in request_json and request_json['type'] == 'Undo' and
'object' in request_json and request_json['object']['type'] == 'Like')):
return shared_inbox()
if 'type' in request_json and request_json['type'] == 'Accept':
return shared_inbox()
try:
HttpSignature.verify_request(request, actor.public_key, skip_date=True)
if 'type' in request_json:
if request_json['type'] == 'Follow':
if current_app.debug:
process_user_follow_request(request_json, activity_log.id, actor.id)
else:
process_user_follow_request.delay(request_json, activity_log.id, actor.id)
elif request_json['type'] == 'Undo' and 'object' in request_json and request_json['object']['type'] == 'Follow':
local_user_ap_id = request_json['object']['object']
local_user = find_actor_or_create(local_user_ap_id, create_if_not_found=False)
remote_user = User.query.get(actor.id)
if local_user:
db.session.query(UserFollower).filter_by(local_user_id=local_user.id, remote_user_id=remote_user.id, is_accepted=True).delete()
activity_log.result = 'success'
else:
activity_log.exception_message = 'Could not find local user'
activity_log.result = 'failure'
db.session.commit()
elif ('type' in request_json and request_json['type'] == 'Create' and
'object' in request_json and request_json['object']['type'] == 'Note' and
'name' in request_json['object']): # poll votes
in_reply_to = request_json['object']['inReplyTo'] if 'inReplyTo' in request_json['object'] else None
if in_reply_to:
post_being_replied_to = Post.query.filter_by(ap_id=request_json['object']['inReplyTo']).first()
if post_being_replied_to:
community_ap_id = post_being_replied_to.community.ap_profile_id
community = find_actor_or_create(community_ap_id, community_only=True, create_if_not_found=False)
user_ap_id = request_json['object']['attributedTo']
user = find_actor_or_create(user_ap_id, create_if_not_found=False)
if can_create_post_reply(user, community):
poll_data = Poll.query.get(post_being_replied_to.id)
choice = PollChoice.query.filter_by(post_id=post_being_replied_to.id, choice_text=request_json['object']['name']).first()
if poll_data and choice:
poll_data.vote_for_choice(choice.id, user.id)
activity_log.activity_type = 'Poll Vote'
activity_log.result = 'success'
db.session.commit()
if post_being_replied_to.author.is_local():
inform_followers_of_post_update(post_being_replied_to.id, user.instance_id)
except VerificationError:
activity_log.result = 'failure'
activity_log.exception_message = 'Could not verify signature'
db.session.commit()
return '', 400
else:
actor_name = request_json['actor'] if 'actor' in request_json else ''
activity_log.exception_message = f'Actor could not be found 2: {actor_name}'
if activity_log.exception_message is not None:
activity_log.result = 'failure'
db.session.commit()
resp = jsonify('ok')
resp.content_type = 'application/activity+json'
return resp
@celery.task
def process_user_follow_request(request_json, activitypublog_id, remote_user_id):
activity_log = ActivityPubLog.query.get(activitypublog_id)
local_user_ap_id = request_json['object']
follow_id = request_json['id']
local_user = find_actor_or_create(local_user_ap_id, create_if_not_found=False)
remote_user = User.query.get(remote_user_id)
if local_user and local_user.is_local() and not remote_user.is_local():
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)
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)
}
if post_request(remote_user.ap_inbox_url, accept, local_user.private_key, f"{local_user.public_url()}#main-key") is True:
activity_log.result = 'success'
else:
activity_log.exception_message = 'Error sending Accept'
else:
activity_log.exception_message = 'Could not find local user'
activity_log.result = 'failure'
db.session.commit()
@bp.route('/c/<actor>/inbox', methods=['GET', 'POST'])
def community_inbox(actor):
return shared_inbox()
@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'])
def comment_ap(comment_id):
if is_activitypub_request():
reply = PostReply.query.get_or_404(comment_id)
reply_data = comment_model_to_json(reply)
resp = jsonify(reply_data)
resp.content_type = 'application/activity+json'
resp.headers.set('Vary', 'Accept')
return resp
else:
reply = PostReply.query.get_or_404(comment_id)
return continue_discussion(reply.post.id, comment_id)
@bp.route('/post/<int:post_id>/', methods=['GET'])
def post_ap2(post_id):
return redirect(url_for('activitypub.post_ap', post_id=post_id))
@bp.route('/post/<int:post_id>', methods=['GET', 'POST'])
def post_ap(post_id):
if request.method == 'GET' and is_activitypub_request():
post = Post.query.get_or_404(post_id)
post_data = post_to_page(post)
post_data['@context'] = default_context()
resp = jsonify(post_data)
resp.content_type = 'application/activity+json'
resp.headers.set('Vary', 'Accept')
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=True):
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(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'Create processed after Update')
return
if user.id == post.user_id:
update_post_from_activity(post, activity_json)
log_incoming_ap(request_json['id'], APLOG_UPDATE, APLOG_SUCCESS, request_json if store_ap_json else None)
if not announced:
announce_activity_to_followers(post.community, post.author, request_json)
return
else:
log_incoming_ap(request_json['id'], APLOG_UPDATE, APLOG_FAILURE, request_json if store_ap_json else None, '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(request_json['id'], APLOG_CREATE, APLOG_SUCCESS, request_json if store_ap_json else None)
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(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'TypeError. See log file.')
return
else:
log_incoming_ap(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, '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(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'Create processed after Update')
return
if user.id == reply.user_id:
update_post_reply_from_activity(reply, activity_json)
log_incoming_ap(request_json['id'], APLOG_UPDATE, APLOG_SUCCESS, request_json if store_ap_json else None)
if not announced:
announce_activity_to_followers(reply.community, reply.author, request_json)
return
else:
log_incoming_ap(request_json['id'], APLOG_UPDATE, APLOG_FAILURE, request_json if store_ap_json else None, '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(request_json['id'], APLOG_CREATE, APLOG_SUCCESS, request_json if store_ap_json else None)
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(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'TypeError. See log file.')
return
else:
log_incoming_ap(request_json['id'], APLOG_CREATE, APLOG_FAILURE, request_json if store_ap_json else None, 'User cannot create reply in Community')
return
def process_upvote(user, store_ap_json, request_json, announced=True):
ap_id = request_json['object'] if not announced else request_json['object']['object']
liked = find_liked_object(ap_id)
if liked is None:
log_incoming_ap(request_json['id'], APLOG_LIKE, APLOG_FAILURE, request_json if store_ap_json else None, 'Unfound object ' + ap_id)
return
if can_upvote(user, liked.community):
if isinstance(liked, (Post, PostReply)):
liked.vote(user, 'upvote')
log_incoming_ap(request_json['id'], APLOG_LIKE, APLOG_SUCCESS, request_json if store_ap_json else None)
if not announced:
announce_activity_to_followers(liked.community, user, request_json)
else:
log_incoming_ap(request_json['id'], APLOG_LIKE, APLOG_IGNORED, request_json if store_ap_json else None, 'Cannot upvote this')
def process_downvote(user, store_ap_json, request_json, announced=True):
ap_id = request_json['object'] if not announced else request_json['object']['object']
liked = find_liked_object(ap_id)
if liked is None:
log_incoming_ap(request_json['id'], APLOG_DISLIKE, APLOG_FAILURE, request_json if store_ap_json else None, 'Unfound object ' + ap_id)
return
if can_downvote(user, liked.community):
if isinstance(liked, (Post, PostReply)):
liked.vote(user, 'downvote')
log_incoming_ap(request_json['id'], APLOG_DISLIKE, APLOG_SUCCESS, request_json if store_ap_json else None)
if not announced:
announce_activity_to_followers(liked.community, user, request_json)
else:
log_incoming_ap(request_json['id'], APLOG_DISLIKE, APLOG_IGNORED, request_json if store_ap_json else None, 'Cannot downvote this')
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