732 lines
24 KiB
Python
732 lines
24 KiB
Python
import binascii
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import hashlib
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import logging
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import os
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from datetime import datetime
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from datetime import timezone
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from typing import Any
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from typing import Dict
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from typing import List
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from typing import Optional
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from urllib.parse import urljoin
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from urllib.parse import urlparse
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from bson.objectid import ObjectId
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from flask import url_for
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from little_boxes import activitypub as ap
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from little_boxes import strtobool
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from little_boxes.activitypub import _to_list
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from little_boxes.activitypub import clean_activity
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from little_boxes.activitypub import format_datetime
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from little_boxes.backend import Backend
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from little_boxes.errors import ActivityGoneError
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from little_boxes.httpsig import HTTPSigAuth
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from config import BASE_URL
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from config import DB
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from config import DEFAULT_CTX
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from config import EXTRA_INBOXES
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from config import ID
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from config import KEY
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from config import ME
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from config import USER_AGENT
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from core.db import find_one_activity
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from core.db import update_many_activities
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from core.meta import Box
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from core.meta import MetaKey
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from core.meta import by_object_id
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from core.meta import by_remote_id
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from core.meta import by_type
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from core.meta import flag
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from core.meta import inc
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from core.meta import upsert
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from core.remote import server
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from core.tasks import Tasks
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from utils import now
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logger = logging.getLogger(__name__)
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_NewMeta = Dict[str, Any]
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SIG_AUTH = HTTPSigAuth(KEY)
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MY_PERSON = ap.Person(**ME)
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def _remove_id(doc: ap.ObjectType) -> ap.ObjectType:
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"""Helper for removing MongoDB's `_id` field."""
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doc = doc.copy()
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if "_id" in doc:
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del doc["_id"]
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return doc
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def _answer_key(choice: str) -> str:
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h = hashlib.new("sha1")
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h.update(choice.encode())
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return h.hexdigest()
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def _actor_hash(actor: ap.ActivityType) -> str:
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"""Used to know when to update the meta actor cache, like an "actor version"."""
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h = hashlib.new("sha1")
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h.update(actor.id.encode())
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h.update((actor.name or "").encode())
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h.update((actor.preferredUsername or "").encode())
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h.update((actor.summary or "").encode())
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h.update((actor.url or "").encode())
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key = actor.get_key()
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h.update(key.pubkey_pem.encode())
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h.update(key.key_id().encode())
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if isinstance(actor.icon, dict) and "url" in actor.icon:
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h.update(actor.icon["url"].encode())
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return h.hexdigest()
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def _is_local_reply(create: ap.Create) -> bool:
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for dest in _to_list(create.to or []):
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if dest.startswith(BASE_URL):
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return True
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for dest in _to_list(create.cc or []):
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if dest.startswith(BASE_URL):
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return True
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return False
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def save(box: Box, activity: ap.BaseActivity) -> None:
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"""Custom helper for saving an activity to the DB."""
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visibility = ap.get_visibility(activity)
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is_public = False
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if visibility in [ap.Visibility.PUBLIC, ap.Visibility.UNLISTED]:
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is_public = True
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object_id = None
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try:
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object_id = activity.get_object_id()
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except Exception: # TODO(tsileo): should be ValueError, but replies trigger a KeyError on object
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pass
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object_visibility = None
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if activity.has_type(
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[ap.ActivityType.CREATE, ap.ActivityType.ANNOUNCE, ap.ActivityType.LIKE]
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):
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object_visibility = ap.get_visibility(activity.get_object()).name
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actor_id = activity.get_actor().id
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DB.activities.insert_one(
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{
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"box": box.value,
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"activity": activity.to_dict(),
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"type": _to_list(activity.type),
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"remote_id": activity.id,
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"meta": {
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"undo": False,
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"deleted": False,
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"public": is_public,
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"server": urlparse(activity.id).netloc,
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"visibility": visibility.name,
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"actor_id": actor_id,
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"object_id": object_id,
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"object_visibility": object_visibility,
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"poll_answer": False,
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},
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}
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)
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def outbox_is_blocked(actor_id: str) -> bool:
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return bool(
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DB.activities.find_one(
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{
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"box": Box.OUTBOX.value,
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"type": ap.ActivityType.BLOCK.value,
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"activity.object": actor_id,
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"meta.undo": False,
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}
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)
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)
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def activity_url(item_id: str) -> str:
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return urljoin(BASE_URL, url_for("outbox_detail", item_id=item_id))
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def post_to_inbox(activity: ap.BaseActivity) -> None:
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# Check for Block activity
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actor = activity.get_actor()
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if outbox_is_blocked(actor.id):
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logger.info(
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f"actor {actor!r} is blocked, dropping the received activity {activity!r}"
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)
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return
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# If the message is coming from a Pleroma relay, we process it as a possible reply for a stream activity
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if (
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actor.has_type(ap.ActivityType.APPLICATION)
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and actor.id.endswith("/relay")
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and activity.has_type(ap.ActivityType.ANNOUNCE)
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and not find_one_activity(
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{
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**by_object_id(activity.get_object_id()),
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**by_type(ap.ActivityType.CREATE),
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}
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)
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and not DB.replies.find_one(by_remote_id(activity.get_object_id()))
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):
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Tasks.process_reply(activity.get_object_id())
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return
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# Hubzilla forward activities in a Create, process them as possible replies
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if activity.has_type(ap.ActivityType.CREATE) and server(activity.id) != server(
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activity.get_object_id()
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):
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Tasks.process_reply(activity.get_object_id())
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return
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if DB.activities.find_one({"box": Box.INBOX.value, "remote_id": activity.id}):
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# The activity is already in the inbox
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logger.info(f"received duplicate activity {activity!r}, dropping it")
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return
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save(Box.INBOX, activity)
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logger.info(f"spawning tasks for {activity!r}")
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if not activity.has_type([ap.ActivityType.DELETE, ap.ActivityType.UPDATE]):
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Tasks.cache_actor(activity.id)
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Tasks.process_new_activity(activity.id)
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Tasks.finish_post_to_inbox(activity.id)
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def save_reply(activity: ap.BaseActivity, meta: Dict[str, Any] = {}) -> None:
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visibility = ap.get_visibility(activity)
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is_public = False
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if visibility in [ap.Visibility.PUBLIC, ap.Visibility.UNLISTED]:
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is_public = True
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published = activity.published if activity.published else now()
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DB.replies.insert_one(
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{
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"activity": activity.to_dict(),
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"type": _to_list(activity.type),
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"remote_id": activity.id,
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"meta": {
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"undo": False,
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"deleted": False,
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"public": is_public,
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"server": urlparse(activity.id).netloc,
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"visibility": visibility.name,
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"actor_id": activity.get_actor().id,
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MetaKey.PUBLISHED.value: published,
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**meta,
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},
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}
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)
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def post_to_outbox(activity: ap.BaseActivity) -> str:
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if activity.has_type(ap.CREATE_TYPES):
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activity = activity.build_create()
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# Assign create a random ID
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obj_id = binascii.hexlify(os.urandom(8)).decode("utf-8")
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uri = activity_url(obj_id)
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activity._data["id"] = uri
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if activity.has_type(ap.ActivityType.CREATE):
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activity._data["object"]["id"] = urljoin(
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BASE_URL, url_for("outbox_activity", item_id=obj_id)
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)
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activity._data["object"]["url"] = urljoin(
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BASE_URL, url_for("note_by_id", note_id=obj_id)
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)
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activity.reset_object_cache()
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save(Box.OUTBOX, activity)
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Tasks.cache_actor(activity.id)
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Tasks.finish_post_to_outbox(activity.id)
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return activity.id
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class MicroblogPubBackend(Backend):
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"""Implements a Little Boxes backend, backed by MongoDB."""
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def base_url(self) -> str:
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return BASE_URL
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def debug_mode(self) -> bool:
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return strtobool(os.getenv("MICROBLOGPUB_DEBUG", "false"))
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def user_agent(self) -> str:
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"""Setup a custom user agent."""
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return USER_AGENT
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def extra_inboxes(self) -> List[str]:
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return EXTRA_INBOXES
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def followers(self) -> List[str]:
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q = {
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"box": Box.INBOX.value,
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"type": ap.ActivityType.FOLLOW.value,
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"meta.undo": False,
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}
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return [doc["activity"]["actor"] for doc in DB.activities.find(q)]
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def followers_as_recipients(self) -> List[str]:
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q = {
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"box": Box.INBOX.value,
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"type": ap.ActivityType.FOLLOW.value,
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"meta.undo": False,
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}
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recipients = []
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for doc in DB.activities.find(q):
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recipients.append(
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doc["meta"]["actor"]["sharedInbox"] or doc["meta"]["actor"]["inbox"]
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)
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return list(set(recipients))
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def following(self) -> List[str]:
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q = {
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"box": Box.OUTBOX.value,
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"type": ap.ActivityType.FOLLOW.value,
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"meta.undo": False,
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}
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return [doc["activity"]["object"] for doc in DB.activities.find(q)]
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def parse_collection(
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self, payload: Optional[Dict[str, Any]] = None, url: Optional[str] = None
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) -> List[str]:
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"""Resolve/fetch a `Collection`/`OrderedCollection`."""
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# Resolve internal collections via MongoDB directly
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if url == ID + "/followers":
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return self.followers()
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elif url == ID + "/following":
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return self.following()
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return super().parse_collection(payload, url)
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def _fetch_iri(self, iri: str) -> ap.ObjectType: # noqa: C901
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# Shortcut if the instance actor is fetched
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if iri == ME["id"]:
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return ME
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# Internal collecitons handling
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# Followers
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if iri == MY_PERSON.followers:
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followers = []
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for data in DB.activities.find(
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{
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"box": Box.INBOX.value,
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"type": ap.ActivityType.FOLLOW.value,
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"meta.undo": False,
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}
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):
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followers.append(data["meta"]["actor_id"])
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return {"type": "Collection", "items": followers}
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# Following
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if iri == MY_PERSON.following:
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following = []
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for data in DB.activities.find(
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{
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"box": Box.OUTBOX.value,
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"type": ap.ActivityType.FOLLOW.value,
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"meta.undo": False,
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}
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):
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following.append(data["meta"]["object_id"])
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return {"type": "Collection", "items": following}
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# TODO(tsileo): handle the liked collection too
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# Check if the activity is owned by this server
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if iri.startswith(BASE_URL):
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is_a_note = False
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if iri.endswith("/activity"):
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iri = iri.replace("/activity", "")
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is_a_note = True
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data = DB.activities.find_one({"box": Box.OUTBOX.value, "remote_id": iri})
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if data and data["meta"]["deleted"]:
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raise ActivityGoneError(f"{iri} is gone")
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if data and is_a_note:
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return data["activity"]["object"]
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elif data:
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return data["activity"]
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else:
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# Check if the activity is stored in the inbox
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data = DB.activities.find_one({"remote_id": iri})
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if data:
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if data["meta"]["deleted"]:
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raise ActivityGoneError(f"{iri} is gone")
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return data["activity"]
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# Check if we're looking for an object wrapped in a Create
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obj = DB.activities.find_one({"meta.object_id": iri, "type": "Create"})
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if obj:
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if obj["meta"]["deleted"]:
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raise ActivityGoneError(f"{iri} is gone")
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return obj["meta"].get("object") or obj["activity"]["object"]
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# TODO(tsileo): also check the REPLIES box
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# Check if it's cached because it's a follower
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# Remove extra info (like the key hash if any)
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cleaned_iri = iri.split("#")[0]
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actor = DB.activities.find_one(
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{"meta.actor_id": cleaned_iri, "meta.actor": {"$exists": True}}
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)
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# "type" check is here to skip old metadata for "old/buggy" followers
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if (
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actor
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and actor["meta"].get("actor")
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and "type" in actor["meta"]["actor"]
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):
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return actor["meta"]["actor"]
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# Check if it's cached because it's a following
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actor2 = DB.activities.find_one(
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{
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"meta.object_id": cleaned_iri,
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"type": ap.ActivityType.FOLLOW.value,
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"meta.undo": False,
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}
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)
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if (
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actor2
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and actor2["meta"].get("object")
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and "type" in actor2["meta"]["object"]
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):
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return actor2["meta"]["object"]
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reply = DB.replies.find_one(by_remote_id(iri))
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if reply:
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return reply["activity"]
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# Fetch the URL via HTTP
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logger.info(f"dereference {iri} via HTTP")
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return super().fetch_iri(iri)
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def fetch_iri(self, iri: str, **kwargs: Any) -> ap.ObjectType:
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if not kwargs.pop("no_cache", False):
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# Fetch the activity by checking the local DB first
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data = self._fetch_iri(iri)
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logger.debug(f"_fetch_iri({iri!r}) == {data!r}")
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else:
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# Pass the SIG_AUTH to enable "authenticated fetch"
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data = super().fetch_iri(iri, auth=SIG_AUTH)
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logger.debug(f"fetch_iri({iri!r}) == {data!r}")
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return data
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def embed_collection(total_items, first_page_id):
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"""Helper creating a root OrderedCollection with a link to the first page."""
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return {
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"type": ap.ActivityType.ORDERED_COLLECTION.value,
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"totalItems": total_items,
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"first": f"{first_page_id}?page=first",
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"id": first_page_id,
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}
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def simple_build_ordered_collection(col_name, data):
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return {
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"@context": DEFAULT_CTX,
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"id": BASE_URL + "/" + col_name,
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"totalItems": len(data),
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"type": ap.ActivityType.ORDERED_COLLECTION.value,
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"orderedItems": data,
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}
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def build_ordered_collection(
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col, q=None, cursor=None, map_func=None, limit=50, col_name=None, first_page=False
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):
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"""Helper for building an OrderedCollection from a MongoDB query (with pagination support)."""
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col_name = col_name or col.name
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if q is None:
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q = {}
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if cursor:
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q["_id"] = {"$lt": ObjectId(cursor)}
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data = list(col.find(q, limit=limit).sort("_id", -1))
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if not data:
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# Returns an empty page if there's a cursor
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if cursor:
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return {
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"@context": ap.COLLECTION_CTX,
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"type": ap.ActivityType.ORDERED_COLLECTION_PAGE.value,
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"id": BASE_URL + "/" + col_name + "?cursor=" + cursor,
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"partOf": BASE_URL + "/" + col_name,
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"totalItems": 0,
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"orderedItems": [],
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}
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return {
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"@context": ap.COLLECTION_CTX,
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"id": BASE_URL + "/" + col_name,
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"totalItems": 0,
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"type": ap.ActivityType.ORDERED_COLLECTION.value,
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"orderedItems": [],
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}
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start_cursor = str(data[0]["_id"])
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next_page_cursor = str(data[-1]["_id"])
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total_items = col.find(q).count()
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data = [_remove_id(doc) for doc in data]
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if map_func:
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data = [map_func(doc) for doc in data]
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# No cursor, this is the first page and we return an OrderedCollection
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if not cursor:
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resp = {
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"@context": ap.COLLECTION_CTX,
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"id": f"{BASE_URL}/{col_name}",
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"totalItems": total_items,
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"type": ap.ActivityType.ORDERED_COLLECTION.value,
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"first": {
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"id": f"{BASE_URL}/{col_name}?cursor={start_cursor}",
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"orderedItems": data,
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"partOf": f"{BASE_URL}/{col_name}",
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"totalItems": total_items,
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"type": ap.ActivityType.ORDERED_COLLECTION_PAGE.value,
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},
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}
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if len(data) == limit:
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resp["first"]["next"] = (
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BASE_URL + "/" + col_name + "?cursor=" + next_page_cursor
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)
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if first_page:
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return resp["first"]
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return resp
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# If there's a cursor, then we return an OrderedCollectionPage
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resp = {
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"@context": ap.COLLECTION_CTX,
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"type": ap.ActivityType.ORDERED_COLLECTION_PAGE.value,
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"id": BASE_URL + "/" + col_name + "?cursor=" + start_cursor,
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"totalItems": total_items,
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"partOf": BASE_URL + "/" + col_name,
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"orderedItems": data,
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}
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if len(data) == limit:
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resp["next"] = BASE_URL + "/" + col_name + "?cursor=" + next_page_cursor
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|
if first_page:
|
|
return resp["first"]
|
|
|
|
# XXX(tsileo): implements prev with prev=<first item cursor>?
|
|
|
|
return resp
|
|
|
|
|
|
def _add_answers_to_question(raw_doc: Dict[str, Any]) -> None:
|
|
activity = raw_doc["activity"]
|
|
if (
|
|
ap._has_type(activity["type"], ap.ActivityType.CREATE)
|
|
and "object" in activity
|
|
and ap._has_type(activity["object"]["type"], ap.ActivityType.QUESTION)
|
|
):
|
|
for choice in activity["object"].get("oneOf", activity["object"].get("anyOf")):
|
|
choice["replies"] = {
|
|
"type": ap.ActivityType.COLLECTION.value,
|
|
"totalItems": raw_doc["meta"]
|
|
.get("question_answers", {})
|
|
.get(_answer_key(choice["name"]), 0),
|
|
}
|
|
now = datetime.now(timezone.utc)
|
|
if format_datetime(now) >= activity["object"]["endTime"]:
|
|
activity["object"]["closed"] = activity["object"]["endTime"]
|
|
|
|
|
|
def add_extra_collection(raw_doc: Dict[str, Any]) -> Dict[str, Any]:
|
|
if not ap._has_type(raw_doc["activity"]["type"], ap.ActivityType.CREATE.value):
|
|
return raw_doc
|
|
|
|
raw_doc["activity"]["object"]["replies"] = embed_collection(
|
|
raw_doc.get("meta", {}).get(MetaKey.COUNT_REPLY.value, 0),
|
|
f'{raw_doc["remote_id"]}/replies',
|
|
)
|
|
|
|
raw_doc["activity"]["object"]["likes"] = embed_collection(
|
|
raw_doc.get("meta", {}).get(MetaKey.COUNT_LIKE.value, 0),
|
|
f'{raw_doc["remote_id"]}/likes',
|
|
)
|
|
|
|
raw_doc["activity"]["object"]["shares"] = embed_collection(
|
|
raw_doc.get("meta", {}).get(MetaKey.COUNT_BOOST.value, 0),
|
|
f'{raw_doc["remote_id"]}/shares',
|
|
)
|
|
|
|
return raw_doc
|
|
|
|
|
|
def remove_context(activity: Dict[str, Any]) -> Dict[str, Any]:
|
|
if "@context" in activity:
|
|
del activity["@context"]
|
|
return activity
|
|
|
|
|
|
def activity_from_doc(raw_doc: Dict[str, Any], embed: bool = False) -> Dict[str, Any]:
|
|
raw_doc = add_extra_collection(raw_doc)
|
|
activity = clean_activity(raw_doc["activity"])
|
|
|
|
# Handle Questions
|
|
# TODO(tsileo): what about object embedded by ID/URL?
|
|
_add_answers_to_question(raw_doc)
|
|
if embed:
|
|
return remove_context(activity)
|
|
return activity
|
|
|
|
|
|
def _cache_actor_icon(actor: ap.BaseActivity) -> None:
|
|
if actor.icon:
|
|
if isinstance(actor.icon, dict) and "url" in actor.icon:
|
|
Tasks.cache_actor_icon(actor.icon["url"], actor.id)
|
|
else:
|
|
logger.warning(f"failed to parse icon {actor.icon} for {actor!r}")
|
|
|
|
|
|
def update_cached_actor(actor: ap.BaseActivity) -> None:
|
|
actor_hash = _actor_hash(actor)
|
|
update_many_activities(
|
|
{
|
|
**flag(MetaKey.ACTOR_ID, actor.id),
|
|
**flag(MetaKey.ACTOR_HASH, {"$ne": actor_hash}),
|
|
},
|
|
upsert(
|
|
{MetaKey.ACTOR: actor.to_dict(embed=True), MetaKey.ACTOR_HASH: actor_hash}
|
|
),
|
|
)
|
|
update_many_activities(
|
|
{
|
|
**flag(MetaKey.OBJECT_ACTOR_ID, actor.id),
|
|
**flag(MetaKey.OBJECT_ACTOR_HASH, {"$ne": actor_hash}),
|
|
},
|
|
upsert(
|
|
{
|
|
MetaKey.OBJECT_ACTOR: actor.to_dict(embed=True),
|
|
MetaKey.OBJECT_ACTOR_HASH: actor_hash,
|
|
}
|
|
),
|
|
)
|
|
DB.replies.update_many(
|
|
{
|
|
**flag(MetaKey.ACTOR_ID, actor.id),
|
|
**flag(MetaKey.ACTOR_HASH, {"$ne": actor_hash}),
|
|
},
|
|
upsert(
|
|
{MetaKey.ACTOR: actor.to_dict(embed=True), MetaKey.ACTOR_HASH: actor_hash}
|
|
),
|
|
)
|
|
# TODO(tsileo): Also update following (it's in the object)
|
|
# DB.activities.update_many(
|
|
# {"meta.object_id": actor.id}, {"$set": {"meta.object": actor.to_dict(embed=True)}}
|
|
# )
|
|
_cache_actor_icon(actor)
|
|
|
|
|
|
def handle_question_reply(create: ap.Create, question: ap.Question) -> None:
|
|
choice = create.get_object().name
|
|
|
|
# Ensure it's a valid choice
|
|
if choice not in [c["name"] for c in question._data.get("oneOf", question.anyOf)]:
|
|
logger.info("invalid choice")
|
|
return
|
|
|
|
# Hash the choice/answer (so we can use it as a key)
|
|
answer_key = _answer_key(choice)
|
|
|
|
is_single_choice = bool(question._data.get("oneOf", []))
|
|
dup_query = {
|
|
"activity.object.actor": create.get_actor().id,
|
|
"meta.answer_to": question.id,
|
|
**({} if is_single_choice else {"meta.poll_answer_choice": choice}),
|
|
}
|
|
|
|
print(f"dup_q={dup_query}")
|
|
# Check for duplicate votes
|
|
if DB.activities.find_one(dup_query):
|
|
logger.info("duplicate response")
|
|
return
|
|
|
|
# Update the DB
|
|
|
|
DB.activities.update_one(
|
|
{**by_object_id(question.id), **by_type(ap.ActivityType.CREATE)},
|
|
{
|
|
"$inc": {
|
|
"meta.question_replies": 1,
|
|
f"meta.question_answers.{answer_key}": 1,
|
|
}
|
|
},
|
|
)
|
|
|
|
DB.activities.update_one(
|
|
by_remote_id(create.id),
|
|
{
|
|
"$set": {
|
|
"meta.answer_to": question.id,
|
|
"meta.poll_answer_choice": choice,
|
|
"meta.stream": False,
|
|
"meta.poll_answer": True,
|
|
}
|
|
},
|
|
)
|
|
|
|
return None
|
|
|
|
|
|
def handle_replies(create: ap.Create) -> None:
|
|
"""Go up to the root reply, store unknown replies in the `threads` DB and set the "meta.thread_root_parent"
|
|
key to make it easy to query a whole thread."""
|
|
in_reply_to = create.get_object().get_in_reply_to()
|
|
if not in_reply_to:
|
|
return
|
|
|
|
reply = ap.fetch_remote_activity(in_reply_to)
|
|
if reply.has_type(ap.ActivityType.CREATE):
|
|
reply = reply.get_object()
|
|
# FIXME(tsileo): can be a 403 too, in this case what to do? not error at least
|
|
|
|
# Ensure the this is a local reply, of a question, with a direct "to" addressing
|
|
if (
|
|
reply.id.startswith(BASE_URL)
|
|
and reply.has_type(ap.ActivityType.QUESTION.value)
|
|
and _is_local_reply(create)
|
|
and not create.is_public()
|
|
):
|
|
return handle_question_reply(create, reply)
|
|
elif (
|
|
create.id.startswith(BASE_URL)
|
|
and reply.has_type(ap.ActivityType.QUESTION.value)
|
|
and not create.is_public()
|
|
):
|
|
# Keep track of our own votes
|
|
DB.activities.update_one(
|
|
{"activity.object.id": reply.id, "box": "inbox"},
|
|
{
|
|
"$set": {
|
|
f"meta.poll_answers_sent.{_answer_key(create.get_object().name)}": True
|
|
}
|
|
},
|
|
)
|
|
return None
|
|
|
|
# It's a regular reply, try to increment the reply counter
|
|
creply = DB.activities.find_one_and_update(
|
|
{**by_object_id(in_reply_to), **by_type(ap.ActivityType.CREATE)},
|
|
inc(MetaKey.COUNT_REPLY, 1),
|
|
)
|
|
if not creply:
|
|
# Maybe it's the reply of a reply?
|
|
DB.replies.find_one_and_update(
|
|
by_remote_id(in_reply_to), inc(MetaKey.COUNT_REPLY, 1)
|
|
)
|
|
|
|
# Spawn a task to process it (and determine if it needs to be saved)
|
|
Tasks.process_reply(create.get_object().id)
|