kopia lustrzana https://github.com/snarfed/bridgy-fed
1817 wiersze
70 KiB
Python
1817 wiersze
70 KiB
Python
"""Base protocol class and common code."""
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import copy
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from datetime import datetime, timedelta
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import logging
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import os
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import re
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from threading import Lock
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from urllib.parse import urljoin, urlparse
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from cachetools import cached, LRUCache
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from flask import request
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from google.cloud import ndb
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from google.cloud.ndb import OR
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from google.cloud.ndb.model import _entity_to_protobuf
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from granary import as1, as2
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from granary.source import html_to_text
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from oauth_dropins.webutil.appengine_info import DEBUG
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from oauth_dropins.webutil.flask_util import cloud_tasks_only
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from oauth_dropins.webutil import models
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from oauth_dropins.webutil import util
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from oauth_dropins.webutil.util import json_dumps, json_loads
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from requests import RequestException
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import werkzeug.exceptions
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from werkzeug.exceptions import BadGateway, HTTPException
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import common
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from common import (
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DOMAIN_BLOCKLIST,
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DOMAIN_RE,
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DOMAINS,
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PRIMARY_DOMAIN,
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PROTOCOL_DOMAINS,
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report_error,
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subdomain_wrap,
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)
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import dms
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import ids
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from ids import (
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BOT_ACTOR_AP_IDS,
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normalize_user_id,
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translate_object_id,
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translate_user_id,
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)
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import memcache
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from models import (
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DM,
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Follower,
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Object,
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PROTOCOLS,
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PROTOCOLS_BY_KIND,
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Target,
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User,
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)
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OBJECT_REFRESH_AGE = timedelta(days=30)
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DELETE_TASK_DELAY = timedelta(minutes=2)
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# require a follow for users on these domains before we deliver anything from
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# them other than their profile
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LIMITED_DOMAINS = (os.getenv('LIMITED_DOMAINS', '').split()
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or util.load_file_lines('limited_domains'))
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DONT_STORE_AS1_TYPES = as1.CRUD_VERBS | set((
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'accept',
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'reject',
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'stop-following',
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'undo',
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))
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STORE_AS1_TYPES = (as1.ACTOR_TYPES | as1.POST_TYPES | as1.VERBS_WITH_OBJECT
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- DONT_STORE_AS1_TYPES)
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logger = logging.getLogger(__name__)
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def error(*args, status=299, **kwargs):
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"""Default HTTP status code to 299 to prevent retrying task."""
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return common.error(*args, status=status, **kwargs)
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class ErrorButDoNotRetryTask(HTTPException):
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code = 299
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description = 'ErrorButDoNotRetryTask'
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# https://github.com/pallets/flask/issues/1837#issuecomment-304996942
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werkzeug.exceptions.default_exceptions.setdefault(299, ErrorButDoNotRetryTask)
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werkzeug.exceptions._aborter.mapping.setdefault(299, ErrorButDoNotRetryTask)
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def activity_id_memcache_key(id):
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return memcache.key(f'receive-{id}')
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class Protocol:
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"""Base protocol class. Not to be instantiated; classmethods only.
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Attributes:
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LABEL (str): human-readable lower case name
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OTHER_LABELS (list of str): label aliases
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ABBREV (str): lower case abbreviation, used in URL paths
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PHRASE (str): human-readable name or phrase. Used in phrases like
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``Follow this person on {PHRASE}``
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LOGO_HTML (str): logo emoji or ``<img>`` tag
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CONTENT_TYPE (str): MIME type of this protocol's native data format,
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appropriate for the ``Content-Type`` HTTP header.
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HAS_COPIES (bool): whether this protocol is push and needs us to
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proactively create "copy" users and objects, as opposed to pulling
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converted objects on demand
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REQUIRES_AVATAR (bool): whether accounts on this protocol are required
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to have a profile picture. If they don't, their ``User.status`` will be
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``blocked``.
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REQUIRES_NAME (bool): whether accounts on this protocol are required to
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have a profile name that's different than their handle or id. If they
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don't, their ``User.status`` will be ``blocked``.
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REQUIRES_OLD_ACCOUNT: (bool): whether accounts on this protocol are
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required to be at least :const:`common.OLD_ACCOUNT_AGE` old. If their
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profile includes creation date and it's not old enough, their
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``User.status`` will be ``blocked``.
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DEFAULT_ENABLED_PROTOCOLS (sequence of str): labels of other protocols
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that are automatically enabled for this protocol to bridge into
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DEFAULT_SERVE_USER_PAGES (bool): whether to serve user pages for all of
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this protocol's users on the fed.brid.gy. If ``False``, user pages will
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only be served for users who have explictly opted in.
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SUPPORTED_AS1_TYPES (sequence of str): AS1 objectTypes and verbs that this
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protocol supports receiving and sending.
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SUPPORTS_DMS (bool): whether this protocol can receive DMs (chat messages)
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"""
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ABBREV = None
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PHRASE = None
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OTHER_LABELS = ()
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LOGO_HTML = ''
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CONTENT_TYPE = None
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HAS_COPIES = False
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REQUIRES_AVATAR = False
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REQUIRES_NAME = False
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REQUIRES_OLD_ACCOUNT = False
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DEFAULT_ENABLED_PROTOCOLS = ()
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DEFAULT_SERVE_USER_PAGES = False
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SUPPORTED_AS1_TYPES = ()
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SUPPORTS_DMS = False
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def __init__(self):
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assert False
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@classmethod
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@property
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def LABEL(cls):
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return cls.__name__.lower()
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@staticmethod
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def for_request(fed=None):
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"""Returns the protocol for the current request.
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...based on the request's hostname.
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Args:
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fed (str or protocol.Protocol): protocol to return if the current
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request is on ``fed.brid.gy``
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Returns:
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Protocol: protocol, or None if the provided domain or request hostname
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domain is not a subdomain of ``brid.gy`` or isn't a known protocol
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"""
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return Protocol.for_bridgy_subdomain(request.host, fed=fed)
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@staticmethod
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def for_bridgy_subdomain(domain_or_url, fed=None):
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"""Returns the protocol for a brid.gy subdomain.
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Args:
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domain_or_url (str)
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fed (str or protocol.Protocol): protocol to return if the current
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request is on ``fed.brid.gy``
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Returns:
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class: :class:`Protocol` subclass, or None if the provided domain or request
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hostname domain is not a subdomain of ``brid.gy`` or isn't a known
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protocol
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"""
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domain = (util.domain_from_link(domain_or_url, minimize=False)
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if util.is_web(domain_or_url)
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else domain_or_url)
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if domain == common.PRIMARY_DOMAIN or domain in common.LOCAL_DOMAINS:
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return PROTOCOLS[fed] if isinstance(fed, str) else fed
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elif domain and domain.endswith(common.SUPERDOMAIN):
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label = domain.removesuffix(common.SUPERDOMAIN)
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return PROTOCOLS.get(label)
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@classmethod
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def owns_id(cls, id):
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"""Returns whether this protocol owns the id, or None if it's unclear.
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To be implemented by subclasses.
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IDs are string identities that uniquely identify users, and are intended
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primarily to be machine readable and usable. Compare to handles, which
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are human-chosen, human-meaningful, and often but not always unique.
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Some protocols' ids are more or less deterministic based on the id
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format, eg AT Protocol owns ``at://`` URIs. Others, like http(s) URLs,
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could be owned by eg Web or ActivityPub.
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This should be a quick guess without expensive side effects, eg no
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external HTTP fetches to fetch the id itself or otherwise perform
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discovery.
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Returns False if the id's domain is in :const:`common.DOMAIN_BLOCKLIST`.
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Args:
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id (str)
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Returns:
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bool or None:
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"""
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return False
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@classmethod
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def owns_handle(cls, handle, allow_internal=False):
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"""Returns whether this protocol owns the handle, or None if it's unclear.
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To be implemented by subclasses.
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Handles are string identities that are human-chosen, human-meaningful,
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and often but not always unique. Compare to IDs, which uniquely identify
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users, and are intended primarily to be machine readable and usable.
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Some protocols' handles are more or less deterministic based on the id
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format, eg ActivityPub (technically WebFinger) handles are
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``@user@instance.com``. Others, like domains, could be owned by eg Web,
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ActivityPub, AT Protocol, or others.
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This should be a quick guess without expensive side effects, eg no
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external HTTP fetches to fetch the id itself or otherwise perform
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discovery.
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Args:
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handle (str)
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allow_internal (bool): whether to return False for internal domains
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like ``fed.brid.gy``, ``bsky.brid.gy``, etc
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Returns:
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bool or None
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"""
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return False
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@classmethod
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def handle_to_id(cls, handle):
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"""Converts a handle to an id.
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To be implemented by subclasses.
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May incur network requests, eg DNS queries or HTTP requests. Avoids
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blocked or opted out users.
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Args:
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handle (str)
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Returns:
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str: corresponding id, or None if the handle can't be found
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"""
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raise NotImplementedError()
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@classmethod
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def key_for(cls, id, allow_opt_out=False):
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"""Returns the :class:`google.cloud.ndb.Key` for a given id's :class:`models.User`.
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To be implemented by subclasses. Canonicalizes the id if necessary.
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If called via `Protocol.key_for`, infers the appropriate protocol with
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:meth:`for_id`. If called with a concrete subclass, uses that subclass
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as is.
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Args:
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id (str):
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allow_opt_out (bool): whether to allow users who are currently opted out
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Returns:
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google.cloud.ndb.Key: matching key, or None if the given id is not a
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valid :class:`User` id for this protocol.
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"""
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if cls == Protocol:
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proto = Protocol.for_id(id)
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return proto.key_for(id, allow_opt_out=allow_opt_out) if proto else None
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# load user so that we follow use_instead
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existing = cls.get_by_id(id, allow_opt_out=True)
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if existing:
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if existing.status and not allow_opt_out:
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return None
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return existing.key
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return cls(id=id).key
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@staticmethod
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def _for_id_memcache_key(id, remote=None):
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"""If id is a URL, uses its domain, otherwise returns None.
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Args:
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id (str)
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Returns:
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(str domain, bool remote) or None
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"""
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if remote and util.is_web(id):
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return util.domain_from_link(id)
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@cached(LRUCache(20000), lock=Lock())
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@memcache.memoize(key=_for_id_memcache_key, write=lambda id, remote: remote,
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version=3)
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@staticmethod
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def for_id(id, remote=True):
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"""Returns the protocol for a given id.
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Args:
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id (str)
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remote (bool): whether to perform expensive side effects like fetching
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the id itself over the network, or other discovery.
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Returns:
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Protocol subclass: matching protocol, or None if no single known
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protocol definitively owns this id
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"""
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logger.debug(f'Determining protocol for id {id}')
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if not id:
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return None
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# remove our synthetic id fragment, if any
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#
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# will this eventually cause false positives for other services that
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# include our full ids inside their own ids, non-URL-encoded? guess
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# we'll figure that out if/when it happens.
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id = id.partition('#bridgy-fed-')[0]
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if util.is_web(id):
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# step 1: check for our per-protocol subdomains
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try:
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is_homepage = urlparse(id).path.strip('/') == ''
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except ValueError as e:
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logger.info(f'urlparse ValueError: {e}')
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return None
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by_subdomain = Protocol.for_bridgy_subdomain(id)
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if by_subdomain and not is_homepage and id not in BOT_ACTOR_AP_IDS:
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logger.debug(f' {by_subdomain.LABEL} owns id {id}')
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return by_subdomain
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# step 2: check if any Protocols say conclusively that they own it
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# sort to be deterministic
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protocols = sorted(set(p for p in PROTOCOLS.values() if p),
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key=lambda p: p.LABEL)
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candidates = []
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for protocol in protocols:
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owns = protocol.owns_id(id)
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if owns:
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logger.debug(f' {protocol.LABEL} owns id {id}')
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return protocol
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elif owns is not False:
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candidates.append(protocol)
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if len(candidates) == 1:
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logger.debug(f' {candidates[0].LABEL} owns id {id}')
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return candidates[0]
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# step 3: look for existing Objects in the datastore
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obj = Protocol.load(id, remote=False)
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if obj and obj.source_protocol:
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logger.debug(f' {obj.key.id()} owned by source_protocol {obj.source_protocol}')
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return PROTOCOLS[obj.source_protocol]
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# step 4: fetch over the network, if necessary
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if not remote:
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return None
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for protocol in candidates:
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logger.debug(f'Trying {protocol.LABEL}')
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try:
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obj = protocol.load(id, local=False, remote=True)
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if protocol.ABBREV == 'web':
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# for web, if we fetch and get HTML without microformats,
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# load returns False but the object will be stored in the
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# datastore with source_protocol web, and in cache. load it
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# again manually to check for that.
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obj = Object.get_by_id(id)
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if obj and obj.source_protocol != 'web':
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obj = None
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if obj:
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logger.debug(f' {protocol.LABEL} owns id {id}')
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return protocol
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except BadGateway:
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# we tried and failed fetching the id over the network.
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# this depends on ActivityPub.fetch raising this!
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return None
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except HTTPException as e:
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# internal error we generated ourselves; try next protocol
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pass
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except Exception as e:
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code, _ = util.interpret_http_exception(e)
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if code:
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# we tried and failed fetching the id over the network
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return None
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raise
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logger.info(f'No matching protocol found for {id} !')
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return None
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@cached(LRUCache(20000), lock=Lock())
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@staticmethod
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def for_handle(handle):
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"""Returns the protocol for a given handle.
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May incur expensive side effects like resolving the handle itself over
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the network or other discovery.
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Args:
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handle (str)
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Returns:
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(Protocol subclass, str) tuple: matching protocol and optional id (if
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resolved), or ``(None, None)`` if no known protocol owns this handle
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"""
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# TODO: normalize, eg convert domains to lower case
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logger.debug(f'Determining protocol for handle {handle}')
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if not handle:
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return (None, None)
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# step 1: check if any Protocols say conclusively that they own it.
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# sort to be deterministic.
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protocols = sorted(set(p for p in PROTOCOLS.values() if p),
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key=lambda p: p.LABEL)
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candidates = []
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for proto in protocols:
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owns = proto.owns_handle(handle)
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if owns:
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logger.debug(f' {proto.LABEL} owns handle {handle}')
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return (proto, None)
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elif owns is not False:
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candidates.append(proto)
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if len(candidates) == 1:
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logger.debug(f' {candidates[0].LABEL} owns handle {handle}')
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return (candidates[0], None)
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# step 2: look for matching User in the datastore
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for proto in candidates:
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user = proto.query(proto.handle == handle).get()
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if user:
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if user.status:
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return (None, None)
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logger.debug(f' user {user.key} handle {handle}')
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return (proto, user.key.id())
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# step 3: resolve handle to id
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for proto in candidates:
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id = proto.handle_to_id(handle)
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if id:
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logger.debug(f' {proto.LABEL} resolved handle {handle} to id {id}')
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return (proto, id)
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logger.info(f'No matching protocol found for handle {handle} !')
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return (None, None)
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@classmethod
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def bridged_web_url_for(cls, user, fallback=False):
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"""Returns the web URL for a user's bridged profile in this protocol.
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For example, for Web user ``alice.com``, :meth:`ATProto.bridged_web_url_for`
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returns ``https://bsky.app/profile/alice.com.web.brid.gy``
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Args:
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user (models.User)
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fallback (bool): if True, and bridged users have no canonical user
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profile URL in this protocol, return the native protocol's profile URL
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Returns:
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str, or None if there isn't a canonical URL
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"""
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if fallback:
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return user.web_url()
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@classmethod
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def actor_key(cls, obj, allow_opt_out=False):
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"""Returns the :class:`User`: key for a given object's author or actor.
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Args:
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obj (models.Object)
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allow_opt_out (bool): whether to return a user key if they're opted out
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Returns:
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google.cloud.ndb.key.Key or None:
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"""
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owner = as1.get_owner(obj.as1)
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if owner:
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return cls.key_for(owner, allow_opt_out=allow_opt_out)
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@classmethod
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def bot_user_id(cls):
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"""Returns the Web user id for the bot user for this protocol.
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For example, ``'bsky.brid.gy'`` for ATProto.
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Returns:
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str:
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"""
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return f'{cls.ABBREV}{common.SUPERDOMAIN}'
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@classmethod
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def create_for(cls, user):
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"""Creates or re-activate a copy user in this protocol.
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Should add the copy user to :attr:`copies`.
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If the copy user already exists and active, should do nothing.
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Args:
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user (models.User): original source user. Shouldn't already have a
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copy user for this protocol in :attr:`copies`.
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Raises:
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ValueError: if we can't create a copy of the given user in this protocol
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"""
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raise NotImplementedError()
|
|
|
|
@classmethod
|
|
def send(to_cls, obj, url, from_user=None, orig_obj_id=None):
|
|
"""Sends an outgoing activity.
|
|
|
|
To be implemented by subclasses.
|
|
|
|
NOTE: if this protocol's ``HAS_COPIES`` is True, and this method creates
|
|
a copy and sends it, it *must* add that copy to the *object*'s (not
|
|
activity's) :attr:`copies`!
|
|
|
|
Args:
|
|
obj (models.Object): with activity to send
|
|
url (str): destination URL to send to
|
|
from_user (models.User): user (actor) this activity is from
|
|
orig_obj_id (str): :class:`models.Object` key id of the "original object"
|
|
that this object refers to, eg replies to or reposts or likes
|
|
|
|
Returns:
|
|
bool: True if the activity is sent successfully, False if it is
|
|
ignored or otherwise unsent due to protocol logic, eg no webmention
|
|
endpoint, protocol doesn't support the activity type. (Failures are
|
|
raised as exceptions.)
|
|
|
|
Raises:
|
|
werkzeug.HTTPException if the request fails
|
|
"""
|
|
raise NotImplementedError()
|
|
|
|
@classmethod
|
|
def fetch(cls, obj, **kwargs):
|
|
"""Fetches a protocol-specific object and populates it in an :class:`Object`.
|
|
|
|
Errors are raised as exceptions. If this method returns False, the fetch
|
|
didn't fail but didn't succeed either, eg the id isn't valid for this
|
|
protocol, or the fetch didn't return valid data for this protocol.
|
|
|
|
To be implemented by subclasses.
|
|
|
|
Args:
|
|
obj (models.Object): with the id to fetch. Data is filled into one of
|
|
the protocol-specific properties, eg ``as2``, ``mf2``, ``bsky``.
|
|
kwargs: subclass-specific
|
|
|
|
Returns:
|
|
bool: True if the object was fetched and populated successfully,
|
|
False otherwise
|
|
|
|
Raises:
|
|
requests.RequestException or werkzeug.HTTPException: if the fetch fails
|
|
"""
|
|
raise NotImplementedError()
|
|
|
|
@classmethod
|
|
def convert(cls, obj, from_user=None, **kwargs):
|
|
"""Converts an :class:`Object` to this protocol's data format.
|
|
|
|
For example, an HTML string for :class:`Web`, or a dict with AS2 JSON
|
|
and ``application/activity+json`` for :class:`ActivityPub`.
|
|
|
|
Just passes through to :meth:`_convert`, then does minor
|
|
protocol-independent postprocessing.
|
|
|
|
Args:
|
|
obj (models.Object):
|
|
from_user (models.User): user (actor) this activity/object is from
|
|
kwargs: protocol-specific, passed through to :meth:`_convert`
|
|
|
|
Returns:
|
|
converted object in the protocol's native format, often a dict
|
|
"""
|
|
if not obj or not obj.as1:
|
|
return {}
|
|
|
|
id = obj.key.id() if obj.key else obj.as1.get('id')
|
|
is_activity = obj.as1.get('verb') in ('post', 'update')
|
|
base_obj = as1.get_object(obj.as1) if is_activity else obj.as1
|
|
orig_our_as1 = obj.our_as1
|
|
|
|
# mark bridged actors as bots and add "bridged by Bridgy Fed" to their bios
|
|
if (from_user and base_obj
|
|
and base_obj.get('objectType') in as1.ACTOR_TYPES
|
|
and PROTOCOLS.get(obj.source_protocol) != cls
|
|
and Protocol.for_bridgy_subdomain(id) not in DOMAINS
|
|
# Web users are special cased, they don't get the label if they've
|
|
# explicitly enabled Bridgy Fed with redirects or webmentions
|
|
and not (from_user.LABEL == 'web'
|
|
and (from_user.last_webmention_in or from_user.has_redirects))):
|
|
|
|
obj.our_as1 = copy.deepcopy(obj.as1)
|
|
actor = as1.get_object(obj.as1) if is_activity else obj.as1
|
|
actor['objectType'] = 'person'
|
|
cls.add_source_links(actor=actor, obj=obj, from_user=from_user)
|
|
|
|
converted = cls._convert(obj, from_user=from_user, **kwargs)
|
|
obj.our_as1 = orig_our_as1
|
|
return converted
|
|
|
|
@classmethod
|
|
def _convert(cls, obj, from_user=None, **kwargs):
|
|
"""Converts an :class:`Object` to this protocol's data format.
|
|
|
|
To be implemented by subclasses. Implementations should generally call
|
|
:meth:`Protocol.translate_ids` (as their own class) before converting to
|
|
their format.
|
|
|
|
Args:
|
|
obj (models.Object):
|
|
from_user (models.User): user (actor) this activity/object is from
|
|
kwargs: protocol-specific
|
|
|
|
Returns:
|
|
converted object in the protocol's native format, often a dict. May
|
|
return the ``{}`` empty dict if the object can't be converted.
|
|
"""
|
|
raise NotImplementedError()
|
|
|
|
@classmethod
|
|
def add_source_links(cls, actor, obj, from_user):
|
|
"""Adds "bridged from ... by Bridgy Fed" HTML to ``actor['summary']``.
|
|
|
|
Default implementation; subclasses may override.
|
|
|
|
Args:
|
|
actor (dict): AS1 actor
|
|
obj (models.Object):
|
|
from_user (models.User): user (actor) this activity/object is from
|
|
"""
|
|
assert from_user
|
|
summary = actor.setdefault('summary', '')
|
|
if 'Bridgy Fed]' in html_to_text(summary, ignore_links=True):
|
|
return
|
|
|
|
id = actor.get('id')
|
|
proto_phrase = (PROTOCOLS[obj.source_protocol].PHRASE
|
|
if obj.source_protocol else '')
|
|
if proto_phrase:
|
|
proto_phrase = f' on {proto_phrase}'
|
|
|
|
if from_user.key and id in (from_user.key.id(), from_user.profile_id()):
|
|
source_links = f'[<a href="https://{PRIMARY_DOMAIN}{from_user.user_page_path()}">bridged</a> from <a href="{from_user.web_url()}">{from_user.handle}</a>{proto_phrase} by <a href="https://{PRIMARY_DOMAIN}/">Bridgy Fed</a>]'
|
|
|
|
else:
|
|
url = as1.get_url(actor) or id
|
|
source = util.pretty_link(url) if url else '?'
|
|
source_links = f'[bridged from {source}{proto_phrase} by <a href="https://{PRIMARY_DOMAIN}/">Bridgy Fed</a>]'
|
|
|
|
if summary:
|
|
summary += '<br><br>'
|
|
actor['summary'] = summary + source_links
|
|
|
|
@classmethod
|
|
def set_username(to_cls, user, username):
|
|
"""Sets a custom username for a user's bridged account in this protocol.
|
|
|
|
Args:
|
|
user (models.User)
|
|
username (str)
|
|
|
|
Raises:
|
|
ValueError: if the username is invalid
|
|
RuntimeError: if the username could not be set
|
|
"""
|
|
raise NotImplementedError()
|
|
|
|
@classmethod
|
|
def target_for(cls, obj, shared=False):
|
|
"""Returns an :class:`Object`'s delivery target (endpoint).
|
|
|
|
To be implemented by subclasses.
|
|
|
|
Examples:
|
|
|
|
* If obj has ``source_protocol`` ``web``, returns its URL, as a
|
|
webmention target.
|
|
* If obj is an ``activitypub`` actor, returns its inbox.
|
|
* If obj is an ``activitypub`` object, returns it's author's or actor's
|
|
inbox.
|
|
|
|
Args:
|
|
obj (models.Object):
|
|
shared (bool): optional. If True, returns a common/shared
|
|
endpoint, eg ActivityPub's ``sharedInbox``, that can be reused for
|
|
multiple recipients for efficiency
|
|
|
|
Returns:
|
|
str: target endpoint, or None if not available.
|
|
"""
|
|
raise NotImplementedError()
|
|
|
|
@classmethod
|
|
def is_blocklisted(cls, url, allow_internal=False):
|
|
"""Returns True if we block the given URL and shouldn't deliver to it.
|
|
|
|
Default implementation here, subclasses may override.
|
|
|
|
Args:
|
|
url (str):
|
|
allow_internal (bool): whether to return False for internal domains
|
|
like ``fed.brid.gy``, ``bsky.brid.gy``, etc
|
|
"""
|
|
blocklist = DOMAIN_BLOCKLIST
|
|
if not allow_internal:
|
|
blocklist += DOMAINS
|
|
return util.domain_or_parent_in(util.domain_from_link(url), blocklist)
|
|
|
|
@classmethod
|
|
def translate_ids(to_cls, obj):
|
|
"""Translates all ids in an AS1 object to a specific protocol.
|
|
|
|
Infers source protocol for each id value separately.
|
|
|
|
For example, if ``proto`` is :class:`ActivityPub`, the ATProto URI
|
|
``at://did:plc:abc/coll/123`` will be converted to
|
|
``https://bsky.brid.gy/ap/at://did:plc:abc/coll/123``.
|
|
|
|
Wraps these AS1 fields:
|
|
|
|
* ``id``
|
|
* ``actor``
|
|
* ``author``
|
|
* ``bcc``
|
|
* ``bto``
|
|
* ``cc``
|
|
* ``object``
|
|
* ``object.actor``
|
|
* ``object.author``
|
|
* ``object.id``
|
|
* ``object.inReplyTo``
|
|
* ``object.object``
|
|
* ``attachments[].id``
|
|
* ``tags[objectType=mention].url``
|
|
* ``to``
|
|
|
|
This is the inverse of :meth:`models.Object.resolve_ids`. Much of the
|
|
same logic is duplicated there!
|
|
|
|
TODO: unify with :meth:`Object.resolve_ids`,
|
|
:meth:`models.Object.normalize_ids`.
|
|
|
|
Args:
|
|
to_proto (Protocol subclass)
|
|
obj (dict): AS1 object or activity (not :class:`models.Object`!)
|
|
|
|
Returns:
|
|
dict: wrapped AS1 version of ``obj``
|
|
"""
|
|
assert to_cls != Protocol
|
|
if not obj:
|
|
return obj
|
|
|
|
outer_obj = copy.deepcopy(obj)
|
|
inner_objs = outer_obj['object'] = as1.get_objects(outer_obj)
|
|
|
|
def translate(elem, field, fn, uri=False):
|
|
elem[field] = as1.get_objects(elem, field)
|
|
for obj in elem[field]:
|
|
if id := obj.get('id'):
|
|
if field in ('to', 'cc', 'bcc', 'bto') and as1.is_audience(id):
|
|
continue
|
|
from_cls = Protocol.for_id(id)
|
|
# TODO: what if from_cls is None? relax translate_object_id,
|
|
# make it a noop if we don't know enough about from/to?
|
|
if from_cls and from_cls != to_cls:
|
|
obj['id'] = fn(id=id, from_=from_cls, to=to_cls)
|
|
if obj['id'] and uri:
|
|
obj['id'] = to_cls(id=obj['id']).id_uri()
|
|
|
|
elem[field] = [o['id'] if o.keys() == {'id'} else o
|
|
for o in elem[field]]
|
|
|
|
if len(elem[field]) == 1:
|
|
elem[field] = elem[field][0]
|
|
|
|
type = as1.object_type(outer_obj)
|
|
translate(outer_obj, 'id',
|
|
translate_user_id if type in as1.ACTOR_TYPES
|
|
else translate_object_id)
|
|
|
|
for o in inner_objs:
|
|
is_actor = (as1.object_type(o) in as1.ACTOR_TYPES
|
|
or as1.get_owner(outer_obj) == o.get('id')
|
|
or type in ('follow', 'stop-following'))
|
|
translate(o, 'id', translate_user_id if is_actor else translate_object_id)
|
|
obj_is_actor = o.get('verb') in as1.VERBS_WITH_ACTOR_OBJECT
|
|
translate(o, 'object', translate_user_id if obj_is_actor
|
|
else translate_object_id)
|
|
|
|
for o in [outer_obj] + inner_objs:
|
|
translate(o, 'inReplyTo', translate_object_id)
|
|
for field in 'actor', 'author', 'to', 'cc', 'bto', 'bcc':
|
|
translate(o, field, translate_user_id)
|
|
for tag in as1.get_objects(o, 'tags'):
|
|
if tag.get('objectType') == 'mention':
|
|
translate(tag, 'url', translate_user_id, uri=True)
|
|
for att in as1.get_objects(o, 'attachments'):
|
|
translate(att, 'id', translate_object_id)
|
|
url = att.get('url')
|
|
if url and not att.get('id'):
|
|
if from_cls := Protocol.for_id(url):
|
|
att['id'] = translate_object_id(from_=from_cls, to=to_cls,
|
|
id=url)
|
|
|
|
outer_obj = util.trim_nulls(outer_obj)
|
|
|
|
if objs := util.get_list(outer_obj ,'object'):
|
|
outer_obj['object'] = [o['id'] if o.keys() == {'id'} else o for o in objs]
|
|
if len(outer_obj['object']) == 1:
|
|
outer_obj['object'] = outer_obj['object'][0]
|
|
|
|
return outer_obj
|
|
|
|
@classmethod
|
|
def receive(from_cls, obj, authed_as=None, internal=False, received_at=None):
|
|
"""Handles an incoming activity.
|
|
|
|
If ``obj``'s key is unset, ``obj.as1``'s id field is used. If both are
|
|
unset, returns HTTP 299.
|
|
|
|
Args:
|
|
obj (models.Object)
|
|
authed_as (str): authenticated actor id who sent this activity
|
|
internal (bool): whether to allow activity ids on internal domains,
|
|
from opted out/blocked users, etc.
|
|
received_at (datetime): when we first saw (received) this activity.
|
|
Right now only used for monitoring.
|
|
|
|
Returns:
|
|
(str, int) tuple: (response body, HTTP status code) Flask response
|
|
|
|
Raises:
|
|
werkzeug.HTTPException: if the request is invalid
|
|
"""
|
|
# check some invariants
|
|
assert from_cls != Protocol
|
|
assert isinstance(obj, Object), obj
|
|
|
|
if not obj.as1:
|
|
error('No object data provided')
|
|
|
|
id = None
|
|
if obj.key and obj.key.id():
|
|
id = obj.key.id()
|
|
|
|
if not id:
|
|
id = obj.as1.get('id')
|
|
obj.key = ndb.Key(Object, id)
|
|
|
|
if not id:
|
|
error('No id provided')
|
|
elif from_cls.owns_id(id) is False:
|
|
error(f'Protocol {from_cls.LABEL} does not own id {id}')
|
|
elif from_cls.is_blocklisted(id, allow_internal=internal):
|
|
error(f'Activity {id} is blocklisted')
|
|
# check that this activity is public. only do this for some activities,
|
|
# not eg likes or follows, since Mastodon doesn't currently mark those
|
|
# as explicitly public.
|
|
elif (obj.type in set(('post', 'update')) | as1.POST_TYPES | as1.ACTOR_TYPES
|
|
and not as1.is_public(obj.as1, unlisted=False)
|
|
and not as1.is_dm(obj.as1)):
|
|
logger.info('Dropping non-public activity')
|
|
return ('OK', 200)
|
|
|
|
# lease this object, atomically
|
|
memcache_key = activity_id_memcache_key(id)
|
|
leased = memcache.memcache.add(memcache_key, 'leased', noreply=False,
|
|
expire=5 * 60) # 5 min
|
|
# short circuit if we've already seen this activity id.
|
|
# (don't do this for bare objects since we need to check further down
|
|
# whether they've been updated since we saw them last.)
|
|
if (obj.as1.get('objectType') == 'activity'
|
|
and 'force' not in request.values
|
|
and (not leased
|
|
or (obj.new is False and obj.changed is False))):
|
|
error(f'Already seen this activity {id}', status=204)
|
|
|
|
pruned = {k: v for k, v in obj.as1.items()
|
|
if k not in ('contentMap', 'replies', 'signature')}
|
|
delay = ''
|
|
if received_at and request.headers.get('X-AppEngine-TaskRetryCount') == '0':
|
|
delay_s = int((util.now().replace(tzinfo=None)
|
|
- received_at.replace(tzinfo=None)
|
|
).total_seconds())
|
|
delay = f'({delay_s} s behind)'
|
|
logger.info(f'Receiving {from_cls.LABEL} {obj.type} {id} {delay} AS1: {json_dumps(pruned, indent=2)}')
|
|
|
|
# does this protocol support this activity/object type?
|
|
from_cls.check_supported(obj)
|
|
|
|
# check authorization
|
|
# https://www.w3.org/wiki/ActivityPub/Primer/Authentication_Authorization
|
|
actor = as1.get_owner(obj.as1)
|
|
if not actor:
|
|
error('Activity missing actor or author')
|
|
elif from_cls.owns_id(actor) is False:
|
|
error(f"{from_cls.LABEL} doesn't own actor {actor}, this is probably a bridged activity. Skipping.", status=204)
|
|
|
|
assert authed_as
|
|
assert isinstance(authed_as, str)
|
|
authed_as = normalize_user_id(id=authed_as, proto=from_cls)
|
|
actor = normalize_user_id(id=actor, proto=from_cls)
|
|
if actor != authed_as:
|
|
report_error("Auth: receive: authed_as doesn't match owner",
|
|
user=f'{id} authed_as {authed_as} owner {actor}')
|
|
error(f"actor {actor} isn't authed user {authed_as}")
|
|
|
|
# update copy ids to originals
|
|
obj.normalize_ids()
|
|
obj.resolve_ids()
|
|
|
|
if (obj.type == 'follow'
|
|
and Protocol.for_bridgy_subdomain(as1.get_object(obj.as1).get('id'))):
|
|
# follows of bot user; refresh user profile first
|
|
logger.info(f'Follow of bot user, reloading {actor}')
|
|
from_user = from_cls.get_or_create(id=actor, allow_opt_out=True)
|
|
from_user.reload_profile()
|
|
else:
|
|
# load actor user
|
|
from_user = from_cls.get_or_create(id=actor, allow_opt_out=internal)
|
|
|
|
if not internal and (not from_user
|
|
or from_user.manual_opt_out
|
|
# we want to override opt-out but not manual or blocked
|
|
or (from_user.status and from_user.status != 'opt-out')):
|
|
error(f'Actor {actor} is opted out or blocked', status=204)
|
|
|
|
# if this is an object, ie not an activity, wrap it in a create or update
|
|
obj = from_cls.handle_bare_object(obj, authed_as=authed_as)
|
|
obj.add('users', from_user.key)
|
|
|
|
inner_obj_as1 = as1.get_object(obj.as1)
|
|
inner_obj_id = inner_obj_as1.get('id')
|
|
if obj.type in as1.CRUD_VERBS | as1.VERBS_WITH_OBJECT:
|
|
if not inner_obj_id:
|
|
error(f'{obj.type} object has no id!')
|
|
|
|
# write Object to datastore
|
|
obj.source_protocol = from_cls.LABEL
|
|
if obj.type in STORE_AS1_TYPES:
|
|
obj.put()
|
|
|
|
# store inner object
|
|
# TODO: unify with big obj.type conditional below. would have to merge
|
|
# this with the DM handling block lower down.
|
|
crud_obj = None
|
|
if obj.type in ('post', 'update') and inner_obj_as1.keys() > set(['id']):
|
|
crud_obj = Object.get_or_create(inner_obj_id, our_as1=inner_obj_as1,
|
|
source_protocol=from_cls.LABEL,
|
|
authed_as=actor, users=[from_user.key])
|
|
|
|
actor = as1.get_object(obj.as1, 'actor')
|
|
actor_id = actor.get('id')
|
|
|
|
# handle activity!
|
|
if obj.type == 'stop-following':
|
|
# TODO: unify with handle_follow?
|
|
# TODO: handle multiple followees
|
|
if not actor_id or not inner_obj_id:
|
|
error(f'stop-following requires actor id and object id. Got: {actor_id} {inner_obj_id} {obj.as1}')
|
|
|
|
# deactivate Follower
|
|
from_ = from_cls.key_for(actor_id)
|
|
to_cls = Protocol.for_id(inner_obj_id)
|
|
to = to_cls.key_for(inner_obj_id)
|
|
follower = Follower.query(Follower.to == to,
|
|
Follower.from_ == from_,
|
|
Follower.status == 'active').get()
|
|
if follower:
|
|
logger.info(f'Marking {follower} inactive')
|
|
follower.status = 'inactive'
|
|
follower.put()
|
|
else:
|
|
logger.warning(f'No Follower found for {from_} => {to}')
|
|
|
|
# fall through to deliver to followee
|
|
# TODO: do we convert stop-following to webmention 410 of original
|
|
# follow?
|
|
|
|
# fall through to deliver to followers
|
|
|
|
elif obj.type in ('delete', 'undo'):
|
|
assert inner_obj_id
|
|
inner_obj = Object.get_by_id(inner_obj_id, authed_as=authed_as)
|
|
if not inner_obj:
|
|
logger.info(f"Ignoring, we don't have {inner_obj_id} stored")
|
|
return 'OK', 204
|
|
|
|
# TODO: just delete altogether!
|
|
logger.info(f'Marking Object {inner_obj_id} deleted')
|
|
inner_obj.deleted = True
|
|
inner_obj.put()
|
|
|
|
# if this is an actor, handle deleting it later so that
|
|
# in case it's from_user, user.enabled_protocols is still populated
|
|
#
|
|
# fall through to deliver to followers and delete copy if necessary.
|
|
# should happen via protocol-specific copy target and send of
|
|
# delete activity.
|
|
# https://github.com/snarfed/bridgy-fed/issues/63
|
|
|
|
elif obj.type == 'block':
|
|
if proto := Protocol.for_bridgy_subdomain(inner_obj_id):
|
|
# blocking protocol bot user disables that protocol
|
|
from_user.delete(proto)
|
|
from_user.disable_protocol(proto)
|
|
return 'OK', 200
|
|
|
|
elif obj.type == 'post':
|
|
# handle DMs to bot users
|
|
if as1.is_dm(obj.as1):
|
|
return dms.receive(from_user=from_user, obj=obj)
|
|
|
|
# fetch actor if necessary
|
|
if (actor and actor.keys() == set(['id'])
|
|
and obj.type not in ('delete', 'undo')):
|
|
logger.debug('Fetching actor so we have name, profile photo, etc')
|
|
actor_obj = from_cls.load(actor['id'], raise_=False)
|
|
if actor_obj and actor_obj.as1:
|
|
obj.our_as1 = {**obj.as1, 'actor': actor_obj.as1}
|
|
|
|
# fetch object if necessary
|
|
if (obj.type in ('post', 'update', 'share')
|
|
and inner_obj_as1.keys() == set(['id'])
|
|
and from_cls.owns_id(inner_obj_id)):
|
|
logger.debug('Fetching inner object')
|
|
inner_obj = from_cls.load(inner_obj_id, raise_=False,
|
|
remote=(obj.type in ('post', 'update')))
|
|
if obj.type in ('post', 'update'):
|
|
crud_obj = inner_obj
|
|
if inner_obj and inner_obj.as1:
|
|
obj.our_as1 = {
|
|
**obj.as1,
|
|
'object': {
|
|
**inner_obj_as1,
|
|
**inner_obj.as1,
|
|
}
|
|
}
|
|
elif obj.type in ('post', 'update'):
|
|
error("Need object {inner_obj_id} but couldn't fetch, giving up")
|
|
|
|
if obj.type == 'follow':
|
|
if proto := Protocol.for_bridgy_subdomain(inner_obj_id):
|
|
# follow of one of our protocol bot users; enable that protocol.
|
|
# fall through so that we send an accept.
|
|
from_user.enable_protocol(proto)
|
|
proto.bot_follow(from_user)
|
|
|
|
from_cls.handle_follow(obj)
|
|
|
|
# deliver to targets
|
|
resp = from_cls.deliver(obj, from_user=from_user, crud_obj=crud_obj)
|
|
|
|
# if this is a user, deactivate its followers/followings
|
|
# https://github.com/snarfed/bridgy-fed/issues/1304
|
|
if obj.type == 'delete':
|
|
if user_key := from_cls.key_for(id=inner_obj_id):
|
|
if user := user_key.get():
|
|
for proto in user.enabled_protocols:
|
|
user.disable_protocol(PROTOCOLS[proto])
|
|
|
|
logger.info(f'Deactivating Followers from or to = {inner_obj_id}')
|
|
followers = Follower.query(
|
|
OR(Follower.to == user_key, Follower.from_ == user_key)
|
|
).fetch()
|
|
for f in followers:
|
|
f.status = 'inactive'
|
|
ndb.put_multi(followers)
|
|
|
|
memcache.memcache.set(memcache_key, 'done', expire=7 * 24 * 60 * 60) # 1w
|
|
return resp
|
|
|
|
@classmethod
|
|
def handle_follow(from_cls, obj):
|
|
"""Handles an incoming follow activity.
|
|
|
|
Sends an ``Accept`` back, but doesn't send the ``Follow`` itself. That
|
|
happens in :meth:`deliver`.
|
|
|
|
Args:
|
|
obj (models.Object): follow activity
|
|
"""
|
|
logger.debug('Got follow. Loading users, storing Follow(s), sending accept(s)')
|
|
|
|
# Prepare follower (from) users' data
|
|
# TODO: remove all of this and just use from_user
|
|
from_as1 = as1.get_object(obj.as1, 'actor')
|
|
from_id = from_as1.get('id')
|
|
if not from_id:
|
|
error(f'Follow activity requires actor. Got: {obj.as1}')
|
|
|
|
from_obj = from_cls.load(from_id, raise_=False)
|
|
if not from_obj:
|
|
error(f"Couldn't load {from_id}", status=502)
|
|
|
|
if not from_obj.as1:
|
|
from_obj.our_as1 = from_as1
|
|
from_obj.put()
|
|
|
|
from_key = from_cls.key_for(from_id)
|
|
if not from_key:
|
|
error(f'Invalid {from_cls.LABEL} user key: {from_id}')
|
|
obj.users = [from_key]
|
|
from_user = from_cls.get_or_create(id=from_key.id(), obj=from_obj)
|
|
|
|
# Prepare followee (to) users' data
|
|
to_as1s = as1.get_objects(obj.as1)
|
|
if not to_as1s:
|
|
error(f'Follow activity requires object(s). Got: {obj.as1}')
|
|
|
|
# Store Followers
|
|
for to_as1 in to_as1s:
|
|
to_id = to_as1.get('id')
|
|
if not to_id:
|
|
error(f'Follow activity requires object(s). Got: {obj.as1}')
|
|
|
|
logger.info(f'Follow {from_id} => {to_id}')
|
|
|
|
to_cls = Protocol.for_id(to_id)
|
|
if not to_cls:
|
|
error(f"Couldn't determine protocol for {to_id}")
|
|
elif from_cls == to_cls:
|
|
logger.info(f'Skipping same-protocol Follower {from_id} => {to_id}')
|
|
continue
|
|
|
|
to_obj = to_cls.load(to_id)
|
|
if to_obj and not to_obj.as1:
|
|
to_obj.our_as1 = to_as1
|
|
to_obj.put()
|
|
|
|
to_key = to_cls.key_for(to_id)
|
|
if not to_key:
|
|
logger.info(f'Skipping invalid {from_cls.LABEL} user key: {from_id}')
|
|
continue
|
|
|
|
to_user = to_cls.get_or_create(id=to_key.id(), obj=to_obj,
|
|
allow_opt_out=True)
|
|
follower_obj = Follower.get_or_create(to=to_user, from_=from_user,
|
|
follow=obj.key, status='active')
|
|
obj.add('notify', to_key)
|
|
from_cls.maybe_accept_follow(follower=from_user, followee=to_user,
|
|
follow=obj)
|
|
|
|
@classmethod
|
|
def maybe_accept_follow(_, follower, followee, follow):
|
|
"""Sends an accept activity for a follow.
|
|
|
|
...if the follower protocol handles accepts. Otherwise, does nothing.
|
|
|
|
Args:
|
|
follower: :class:`models.User`
|
|
followee: :class:`models.User`
|
|
follow: :class:`models.Object`
|
|
"""
|
|
if 'accept' not in follower.SUPPORTED_AS1_TYPES:
|
|
return
|
|
|
|
target = follower.target_for(follower.obj)
|
|
if not target:
|
|
error(f"Couldn't find delivery target for follower {follower.key.id()}")
|
|
|
|
# send accept. note that this is one accept for the whole
|
|
# follow, even if it has multiple followees!
|
|
id = f'{followee.key.id()}/followers#accept-{follow.key.id()}'
|
|
accept = {
|
|
'id': id,
|
|
'objectType': 'activity',
|
|
'verb': 'accept',
|
|
'actor': followee.key.id(),
|
|
'object': follow.as1,
|
|
}
|
|
common.create_task(queue='send', id=id, our_as1=accept, url=target,
|
|
protocol=follower.LABEL, user=followee.key.urlsafe())
|
|
|
|
@classmethod
|
|
def bot_follow(bot_cls, user):
|
|
"""Follow a user from a protocol bot user.
|
|
|
|
...so that the protocol starts sending us their activities, if it needs
|
|
a follow for that (eg ActivityPub).
|
|
|
|
Args:
|
|
user (User)
|
|
"""
|
|
from web import Web
|
|
bot = Web.get_by_id(bot_cls.bot_user_id())
|
|
now = util.now().isoformat()
|
|
logger.info(f'Following {user.key.id()} back from bot user {bot.key.id()}')
|
|
|
|
if not user.obj:
|
|
logger.info(" can't follow, user has no profile obj")
|
|
return
|
|
|
|
target = user.target_for(user.obj)
|
|
follow_back_id = f'https://{bot.key.id()}/#follow-back-{user.key.id()}-{now}'
|
|
follow_back_as1 = {
|
|
'objectType': 'activity',
|
|
'verb': 'follow',
|
|
'id': follow_back_id,
|
|
'actor': bot.key.id(),
|
|
'object': user.key.id(),
|
|
}
|
|
common.create_task(queue='send', id=follow_back_id,
|
|
our_as1=follow_back_as1, url=target,
|
|
source_protocol='web', protocol=user.LABEL,
|
|
user=bot.key.urlsafe())
|
|
|
|
@classmethod
|
|
def handle_bare_object(cls, obj, authed_as=None):
|
|
"""If obj is a bare object, wraps it in a create or update activity.
|
|
|
|
Checks if we've seen it before.
|
|
|
|
Args:
|
|
obj (models.Object)
|
|
authed_as (str): authenticated actor id who sent this activity
|
|
|
|
Returns:
|
|
models.Object: ``obj`` if it's an activity, otherwise a new object
|
|
"""
|
|
is_actor = obj.type in as1.ACTOR_TYPES
|
|
if not is_actor and obj.type not in ('note', 'article', 'comment'):
|
|
return obj
|
|
|
|
obj_actor = as1.get_owner(obj.as1)
|
|
now = util.now().isoformat()
|
|
|
|
# occasionally we override the object, eg if this is a profile object
|
|
# coming in via a user with use_instead set
|
|
obj_as1 = obj.as1
|
|
if obj_id := obj.key.id():
|
|
if obj_as1_id := obj_as1.get('id'):
|
|
if obj_id != obj_as1_id:
|
|
logger.info(f'Overriding AS1 object id {obj_as1_id} with Object id {obj_id}')
|
|
obj_as1['id'] = obj_id
|
|
|
|
# this is a raw post; wrap it in a create or update activity
|
|
if obj.changed or is_actor:
|
|
if obj.changed:
|
|
logger.info(f'Content has changed from last time at {obj.updated}! Redelivering to all inboxes')
|
|
else:
|
|
logger.info(f'Got actor profile object, wrapping in update')
|
|
id = f'{obj.key.id()}#bridgy-fed-update-{now}'
|
|
update_as1 = {
|
|
'objectType': 'activity',
|
|
'verb': 'update',
|
|
'id': id,
|
|
'actor': obj_actor,
|
|
'object': {
|
|
# Mastodon requires the updated field for Updates, so
|
|
# add a default value.
|
|
# https://docs.joinmastodon.org/spec/activitypub/#supported-activities-for-statuses
|
|
# https://socialhub.activitypub.rocks/t/what-could-be-the-reason-that-my-update-activity-does-not-work/2893/4
|
|
# https://github.com/mastodon/documentation/pull/1150
|
|
'updated': now,
|
|
**obj_as1,
|
|
},
|
|
}
|
|
logger.debug(f' AS1: {json_dumps(update_as1, indent=2)}')
|
|
return Object(id=id, our_as1=update_as1,
|
|
source_protocol=obj.source_protocol)
|
|
|
|
if (obj.new
|
|
# HACK: force query param here is specific to webmention
|
|
or 'force' in request.form):
|
|
create_id = f'{obj.key.id()}#bridgy-fed-create'
|
|
create_as1 = {
|
|
'objectType': 'activity',
|
|
'verb': 'post',
|
|
'id': create_id,
|
|
'actor': obj_actor,
|
|
'object': obj_as1,
|
|
'published': now,
|
|
}
|
|
logger.info(f'Wrapping in post')
|
|
logger.debug(f' AS1: {json_dumps(create_as1, indent=2)}')
|
|
return Object(id=create_id, our_as1=create_as1,
|
|
source_protocol=obj.source_protocol)
|
|
|
|
error(f'{obj.key.id()} is unchanged, nothing to do', status=204)
|
|
|
|
@classmethod
|
|
def deliver(from_cls, obj, from_user, crud_obj=None, to_proto=None):
|
|
"""Delivers an activity to its external recipients.
|
|
|
|
Args:
|
|
obj (models.Object): activity to deliver
|
|
from_user (models.User): user (actor) this activity is from
|
|
crud_obj (models.Object): if this is a create, update, or delete/undo
|
|
activity, the inner object that's being written, otherwise None.
|
|
(This object's ``notify`` and ``feed`` properties may be updated.)
|
|
to_proto (protocol.Protocol): optional; if provided, only deliver to
|
|
targets on this protocol
|
|
|
|
Returns:
|
|
(str, int) tuple: Flask response
|
|
"""
|
|
if to_proto:
|
|
logger.info(f'Only delivering to {to_proto.LABEL}')
|
|
|
|
# find delivery targets. maps Target to Object or None
|
|
#
|
|
# ...then write the relevant object, since targets() has a side effect of
|
|
# setting the notify and feed properties
|
|
targets = from_cls.targets(obj, from_user=from_user, crud_obj=crud_obj)
|
|
if not targets:
|
|
return r'No targets, nothing to do ¯\_(ツ)_/¯', 204
|
|
|
|
# store object that targets() updated
|
|
# TODO: only if it's dirty
|
|
if crud_obj:
|
|
crud_obj.put()
|
|
elif obj.type in STORE_AS1_TYPES:
|
|
obj.put()
|
|
|
|
obj_params = ({'obj_id': obj.key.id()} if obj.type in STORE_AS1_TYPES
|
|
else obj.to_request())
|
|
|
|
# sort targets so order is deterministic for tests, debugging, etc
|
|
sorted_targets = sorted(targets.items(), key=lambda t: t[0].uri)
|
|
|
|
# enqueue send task for each targets
|
|
logger.info(f'Delivering to: {[t for t, _ in sorted_targets]}')
|
|
user = from_user.key.urlsafe()
|
|
for i, (target, orig_obj) in enumerate(sorted_targets):
|
|
if to_proto and target.protocol != to_proto.LABEL:
|
|
continue
|
|
orig_obj_id = orig_obj.key.id() if orig_obj else None
|
|
common.create_task(queue='send', url=target.uri, protocol=target.protocol,
|
|
orig_obj_id=orig_obj_id, user=user, **obj_params)
|
|
|
|
return 'OK', 202
|
|
|
|
@classmethod
|
|
def targets(from_cls, obj, from_user, crud_obj=None, internal=False):
|
|
"""Collects the targets to send a :class:`models.Object` to.
|
|
|
|
Targets are both objects - original posts, events, etc - and actors.
|
|
|
|
Args:
|
|
obj (models.Object)
|
|
from_user (User)
|
|
crud_obj (models.Object): if this is a create, update, or delete/undo
|
|
activity, the inner object that's being written, otherwise None.
|
|
(This object's ``notify`` and ``feed`` properties may be updated.)
|
|
internal (bool): whether this is a recursive internal call
|
|
|
|
Returns:
|
|
dict: maps :class:`models.Target` to original (in response to)
|
|
:class:`models.Object`, if any, otherwise None
|
|
"""
|
|
logger.debug('Finding recipients and their targets')
|
|
|
|
# we should only have crud_obj iff this is a create or update
|
|
assert (crud_obj is not None) == (obj.type in ('post', 'update')), obj.type
|
|
|
|
target_uris = sorted(set(as1.targets(obj.as1)))
|
|
logger.info(f'Raw targets: {target_uris}')
|
|
orig_obj = None
|
|
targets = {} # maps Target to Object or None
|
|
owner = as1.get_owner(obj.as1)
|
|
allow_opt_out = (obj.type == 'delete')
|
|
inner_obj_as1 = as1.get_object(obj.as1)
|
|
inner_obj_id = inner_obj_as1.get('id')
|
|
in_reply_tos = as1.get_ids(inner_obj_as1, 'inReplyTo')
|
|
is_reply = obj.type == 'comment' or in_reply_tos
|
|
is_self_reply = False
|
|
|
|
if is_reply:
|
|
original_ids = in_reply_tos
|
|
else:
|
|
if inner_obj_id == from_user.key.id():
|
|
inner_obj_id = from_user.profile_id()
|
|
original_ids = [inner_obj_id]
|
|
|
|
# which protocols should we allow delivering to?
|
|
to_protocols = []
|
|
for label in (list(from_user.DEFAULT_ENABLED_PROTOCOLS)
|
|
+ from_user.enabled_protocols):
|
|
proto = PROTOCOLS[label]
|
|
if proto.HAS_COPIES and (obj.type in ('update', 'delete', 'share', 'undo')
|
|
or is_reply):
|
|
for id in original_ids:
|
|
if Protocol.for_id(id) == proto:
|
|
logger.info(f'Allowing {label} for original post {id}')
|
|
break
|
|
elif orig := from_user.load(id, remote=False):
|
|
if orig.get_copy(proto):
|
|
logger.info(f'Allowing {label}, original post {id} was bridged there')
|
|
break
|
|
else:
|
|
logger.info(f"Skipping {label}, original objects {original_ids} weren't bridged there")
|
|
continue
|
|
|
|
util.add(to_protocols, proto)
|
|
|
|
# process direct targets
|
|
for id in sorted(target_uris):
|
|
target_proto = Protocol.for_id(id)
|
|
if not target_proto:
|
|
logger.info(f"Can't determine protocol for {id}")
|
|
continue
|
|
elif target_proto.is_blocklisted(id):
|
|
logger.debug(f'{id} is blocklisted')
|
|
continue
|
|
|
|
orig_obj = target_proto.load(id, raise_=False)
|
|
if not orig_obj or not orig_obj.as1:
|
|
logger.info(f"Couldn't load {id}")
|
|
continue
|
|
|
|
target_author_key = target_proto.actor_key(orig_obj)
|
|
if not from_user.is_enabled(target_proto):
|
|
# if author isn't bridged and inReplyTo author is, DM a prompt
|
|
if id in in_reply_tos:
|
|
if target_author := target_author_key.get():
|
|
if target_author.is_enabled(from_cls):
|
|
dms.maybe_send(
|
|
from_proto=target_proto, to_user=from_user,
|
|
type='replied_to_bridged_user', text=f"""\
|
|
Hi! You <a href="{inner_obj_as1.get('url') or inner_obj_id}">recently replied</a> to {orig_obj.actor_link(image=False)}, who's bridged here from {target_proto.PHRASE}. If you want them to see your replies, you can bridge your account into {target_proto.PHRASE} by following this account. <a href="https://fed.brid.gy/docs">See the docs</a> for more information.""")
|
|
|
|
continue
|
|
|
|
# deliver self-replies to followers
|
|
# https://github.com/snarfed/bridgy-fed/issues/639
|
|
if id in in_reply_tos and owner == as1.get_owner(orig_obj.as1):
|
|
is_self_reply = True
|
|
logger.info(f'self reply!')
|
|
|
|
# also add copies' targets
|
|
for copy in orig_obj.copies:
|
|
proto = PROTOCOLS[copy.protocol]
|
|
if proto in to_protocols:
|
|
# copies generally won't have their own Objects
|
|
if target := proto.target_for(Object(id=copy.uri)):
|
|
logger.debug(f'Adding target {target} for copy {copy.uri} of original {id}')
|
|
targets[Target(protocol=copy.protocol, uri=target)] = orig_obj
|
|
|
|
if target_proto == from_cls:
|
|
logger.debug(f'Skipping same-protocol target {id}')
|
|
continue
|
|
|
|
target = target_proto.target_for(orig_obj)
|
|
if not target:
|
|
# TODO: surface errors like this somehow?
|
|
logger.error(f"Can't find delivery target for {id}")
|
|
continue
|
|
|
|
logger.debug(f'Target for {id} is {target}')
|
|
# only use orig_obj for inReplyTos, like/repost objects, etc
|
|
# https://github.com/snarfed/bridgy-fed/issues/1237
|
|
targets[Target(protocol=target_proto.LABEL, uri=target)] = (
|
|
orig_obj if id in in_reply_tos or id in as1.get_ids(obj.as1, 'object')
|
|
else None)
|
|
|
|
if target_author_key:
|
|
logger.debug(f'Recipient is {target_author_key}')
|
|
(crud_obj or obj).add('notify', target_author_key)
|
|
|
|
if obj.type == 'undo':
|
|
logger.debug('Object is an undo; adding targets for inner object')
|
|
if set(inner_obj_as1.keys()) == {'id'}:
|
|
inner_obj = from_cls.load(inner_obj_id, raise_=False)
|
|
else:
|
|
inner_obj = Object(id=inner_obj_id, our_as1=inner_obj_as1)
|
|
if inner_obj:
|
|
targets.update(from_cls.targets(inner_obj, from_user=from_user,
|
|
internal=True))
|
|
|
|
logger.info(f'Direct targets: {[t.uri for t in targets.keys()]}')
|
|
|
|
# deliver to followers, if appropriate
|
|
user_key = from_cls.actor_key(obj, allow_opt_out=allow_opt_out)
|
|
if not user_key:
|
|
logger.info("Can't tell who this is from! Skipping followers.")
|
|
return targets
|
|
|
|
followers = []
|
|
if (obj.type in ('post', 'update', 'delete', 'share', 'undo')
|
|
and (not is_reply or is_self_reply)):
|
|
logger.info(f'Delivering to followers of {user_key}')
|
|
followers = [
|
|
f for f in Follower.query(Follower.to == user_key,
|
|
Follower.status == 'active')
|
|
# skip protocol bot users
|
|
if not Protocol.for_bridgy_subdomain(f.from_.id())
|
|
# skip protocols this user hasn't enabled, or where the base
|
|
# object of this activity hasn't been bridged
|
|
and PROTOCOLS_BY_KIND[f.from_.kind()] in to_protocols]
|
|
user_keys = [f.from_ for f in followers]
|
|
users = [u for u in ndb.get_multi(user_keys) if u]
|
|
User.load_multi(users)
|
|
|
|
if (not followers and
|
|
(util.domain_or_parent_in(
|
|
util.domain_from_link(from_user.key.id()), LIMITED_DOMAINS)
|
|
or util.domain_or_parent_in(
|
|
util.domain_from_link(obj.key.id()), LIMITED_DOMAINS))):
|
|
logger.info(f'skipping, {from_user.key.id()} is on a limited domain and has no followers')
|
|
return {}
|
|
|
|
# add to followers' feeds, if any
|
|
if not internal and obj.type in ('post', 'update', 'share'):
|
|
feed_obj = crud_obj or obj
|
|
if feed_obj.type not in as1.ACTOR_TYPES:
|
|
feed_obj.feed = [u.key for u in users]
|
|
|
|
# collect targets for followers
|
|
for user in users:
|
|
# TODO: should we pass remote=False through here to Protocol.load?
|
|
target = user.target_for(user.obj, shared=True) if user.obj else None
|
|
if not target:
|
|
# TODO: surface errors like this somehow?
|
|
logger.error(f'Follower {user.key} has no delivery target')
|
|
continue
|
|
|
|
# normalize URL (lower case hostname, etc)
|
|
# ...but preserve our PDS URL without trailing slash in path
|
|
# https://atproto.com/specs/did#did-documents
|
|
target = util.dedupe_urls([target], trailing_slash=False)[0]
|
|
|
|
targets[Target(protocol=user.LABEL, uri=target)] = \
|
|
Object.get_by_id(inner_obj_id) if obj.type == 'share' else None
|
|
|
|
# deliver to enabled HAS_COPIES protocols proactively
|
|
# TODO: abstract for other protocols
|
|
from atproto import ATProto
|
|
if (ATProto in to_protocols
|
|
and obj.type in ('post', 'update', 'delete', 'share')):
|
|
logger.info(f'user has ATProto enabled, adding {ATProto.PDS_URL}')
|
|
targets.setdefault(
|
|
Target(protocol=ATProto.LABEL, uri=ATProto.PDS_URL), None)
|
|
|
|
# de-dupe targets, discard same-domain
|
|
# maps string target URL to (Target, Object) tuple
|
|
candidates = {t.uri: (t, obj) for t, obj in targets.items()}
|
|
# maps Target to Object or None
|
|
targets = {}
|
|
source_domains = [
|
|
util.domain_from_link(url) for url in
|
|
(obj.as1.get('id'), obj.as1.get('url'), as1.get_owner(obj.as1))
|
|
if util.is_web(url)
|
|
]
|
|
for url in sorted(util.dedupe_urls(
|
|
candidates.keys(),
|
|
# preserve our PDS URL without trailing slash in path
|
|
# https://atproto.com/specs/did#did-documents
|
|
trailing_slash=False)):
|
|
if util.is_web(url) and util.domain_from_link(url) in source_domains:
|
|
logger.info(f'Skipping same-domain target {url}')
|
|
continue
|
|
target, obj = candidates[url]
|
|
targets[target] = obj
|
|
|
|
return targets
|
|
|
|
@classmethod
|
|
def load(cls, id, remote=None, local=True, raise_=True, **kwargs):
|
|
"""Loads and returns an Object from datastore or HTTP fetch.
|
|
|
|
Sets the :attr:`new` and :attr:`changed` attributes if we know either
|
|
one for the loaded object, ie local is True and remote is True or None.
|
|
|
|
Args:
|
|
id (str)
|
|
remote (bool): whether to fetch the object over the network. If True,
|
|
fetches even if we already have the object stored, and updates our
|
|
stored copy. If False and we don't have the object stored, returns
|
|
None. Default (None) means to fetch over the network only if we
|
|
don't already have it stored.
|
|
local (bool): whether to load from the datastore before
|
|
fetching over the network. If False, still stores back to the
|
|
datastore after a successful remote fetch.
|
|
raise_ (bool): if False, catches any :class:`request.RequestException`
|
|
or :class:`HTTPException` raised by :meth:`fetch()` and returns
|
|
``None`` instead
|
|
kwargs: passed through to :meth:`fetch()`
|
|
|
|
Returns:
|
|
models.Object: loaded object, or None if it isn't fetchable, eg a
|
|
non-URL string for Web, or ``remote`` is False and it isn't in the
|
|
datastore
|
|
|
|
Raises:
|
|
requests.HTTPError: anything that :meth:`fetch` raises, if ``raise_``
|
|
is True
|
|
"""
|
|
assert id
|
|
assert local or remote is not False
|
|
# logger.debug(f'Loading Object {id} local={local} remote={remote}')
|
|
|
|
obj = orig_as1 = None
|
|
if local:
|
|
obj = Object.get_by_id(id)
|
|
if not obj:
|
|
# logger.debug(f' {id} not in datastore')
|
|
pass
|
|
elif obj.as1 or obj.raw or obj.deleted:
|
|
# logger.debug(f' {id} got from datastore')
|
|
obj.new = False
|
|
|
|
if remote is False:
|
|
return obj
|
|
elif remote is None and obj:
|
|
if obj.updated < util.as_utc(util.now() - OBJECT_REFRESH_AGE):
|
|
# logger.debug(f' last updated {obj.updated}, refreshing')
|
|
pass
|
|
else:
|
|
return obj
|
|
|
|
if obj:
|
|
orig_as1 = obj.as1
|
|
obj.clear()
|
|
obj.new = False
|
|
else:
|
|
obj = Object(id=id)
|
|
if local:
|
|
# logger.debug(f' {id} not in datastore')
|
|
obj.new = True
|
|
obj.changed = False
|
|
|
|
try:
|
|
fetched = cls.fetch(obj, **kwargs)
|
|
except (RequestException, HTTPException) as e:
|
|
if raise_:
|
|
raise
|
|
util.interpret_http_exception(e)
|
|
return None
|
|
|
|
if not fetched:
|
|
return None
|
|
|
|
# https://stackoverflow.com/a/3042250/186123
|
|
size = len(_entity_to_protobuf(obj)._pb.SerializeToString())
|
|
if size > models.MAX_ENTITY_SIZE:
|
|
logger.warning(f'Object is too big! {size} bytes is over {models.MAX_ENTITY_SIZE}')
|
|
return None
|
|
|
|
obj.resolve_ids()
|
|
obj.normalize_ids()
|
|
|
|
if obj.new is False:
|
|
obj.changed = obj.activity_changed(orig_as1)
|
|
|
|
if obj.source_protocol not in (cls.LABEL, cls.ABBREV):
|
|
if obj.source_protocol:
|
|
logger.warning(f'Object {obj.key.id()} changed protocol from {obj.source_protocol} to {cls.LABEL} ?!')
|
|
obj.source_protocol = cls.LABEL
|
|
|
|
obj.put()
|
|
return obj
|
|
|
|
@classmethod
|
|
def check_supported(cls, obj):
|
|
"""If this protocol doesn't support this object, return 204.
|
|
|
|
Also reports an error.
|
|
|
|
(This logic is duplicated in some protocols, eg ActivityPub, so that
|
|
they can short circuit out early. It generally uses their native formats
|
|
instead of AS1, before an :class:`models.Object` is created.)
|
|
|
|
Args:
|
|
obj (Object)
|
|
"""
|
|
if not obj.type:
|
|
return
|
|
|
|
inner_type = as1.object_type(as1.get_object(obj.as1)) or ''
|
|
if (obj.type not in cls.SUPPORTED_AS1_TYPES
|
|
or (obj.type in as1.CRUD_VERBS
|
|
and inner_type
|
|
and inner_type not in cls.SUPPORTED_AS1_TYPES)):
|
|
error(f"Bridgy Fed for {cls.LABEL} doesn't support {obj.type} {inner_type} yet", status=204)
|
|
|
|
# DMs are only allowed to/from protocol bot accounts
|
|
if recip := as1.recipient_if_dm(obj.as1):
|
|
protocol_user_ids = PROTOCOL_DOMAINS + common.protocol_user_copy_ids()
|
|
if (not cls.SUPPORTS_DMS
|
|
or (recip not in protocol_user_ids
|
|
and as1.get_owner(obj.as1) not in protocol_user_ids)):
|
|
error(f"Bridgy Fed doesn't support DMs", status=204)
|
|
|
|
|
|
@cloud_tasks_only(log=None)
|
|
def receive_task():
|
|
"""Task handler for a newly received :class:`models.Object`.
|
|
|
|
Calls :meth:`Protocol.receive` with the form parameters.
|
|
|
|
Parameters:
|
|
authed_as (str): passed to :meth:`Protocol.receive`
|
|
obj_id (str): key id of :class:`models.Object` to handle
|
|
received_at (str, ISO 8601 timestamp): when we first saw (received)
|
|
this activity
|
|
*: If ``obj_id`` is unset, all other parameters are properties for a new
|
|
:class:`models.Object` to handle
|
|
|
|
TODO: migrate incoming webmentions to this. See how we did it for AP. The
|
|
difficulty is that parts of :meth:`protocol.Protocol.receive` depend on
|
|
setup in :func:`web.webmention`, eg :class:`models.Object` with ``new`` and
|
|
``changed``, HTTP request details, etc. See stash for attempt at this for
|
|
:class:`web.Web`.
|
|
"""
|
|
form = request.form.to_dict()
|
|
logger.info(f'Params:\n' + '\n'.join(f'{k} = {v[:100]}' for k, v in form.items()))
|
|
|
|
authed_as = form.pop('authed_as', None)
|
|
internal = (authed_as == common.PRIMARY_DOMAIN
|
|
or authed_as in common.PROTOCOL_DOMAINS)
|
|
|
|
obj = Object.from_request()
|
|
assert obj
|
|
assert obj.source_protocol
|
|
obj.new = True
|
|
|
|
if received_at := form.pop('received_at', None):
|
|
received_at = datetime.fromisoformat(received_at)
|
|
|
|
try:
|
|
return PROTOCOLS[obj.source_protocol].receive(
|
|
obj=obj, authed_as=authed_as, internal=internal, received_at=received_at)
|
|
except RequestException as e:
|
|
util.interpret_http_exception(e)
|
|
error(e, status=304)
|
|
except ValueError as e:
|
|
logger.warning(e, exc_info=True)
|
|
error(e, status=304)
|
|
|
|
|
|
@cloud_tasks_only(log=None)
|
|
def send_task():
|
|
"""Task handler for sending an activity to a single specific destination.
|
|
|
|
Calls :meth:`Protocol.send` with the form parameters.
|
|
|
|
Parameters:
|
|
protocol (str): :class:`Protocol` to send to
|
|
url (str): destination URL to send to
|
|
obj_id (str): key id of :class:`models.Object` to send
|
|
orig_obj_id (str): optional, :class:`models.Object` key id of the
|
|
"original object" that this object refers to, eg replies to or reposts
|
|
or likes
|
|
user (url-safe google.cloud.ndb.key.Key): :class:`models.User` (actor)
|
|
this activity is from
|
|
*: If ``obj_id`` is unset, all other parameters are properties for a new
|
|
:class:`models.Object` to handle
|
|
"""
|
|
form = request.form.to_dict()
|
|
logger.info(f'Params: {list(form.items())}')
|
|
|
|
# prepare
|
|
url = form.get('url')
|
|
protocol = form.get('protocol')
|
|
if not url or not protocol:
|
|
logger.warning(f'Missing protocol or url; got {protocol} {url}')
|
|
return '', 204
|
|
|
|
target = Target(uri=url, protocol=protocol)
|
|
obj = Object.from_request()
|
|
assert obj and obj.key and obj.key.id()
|
|
|
|
PROTOCOLS[protocol].check_supported(obj)
|
|
allow_opt_out = (obj.type == 'delete')
|
|
|
|
user = None
|
|
if user_key := form.get('user'):
|
|
key = ndb.Key(urlsafe=user_key)
|
|
# use get_by_id so that we follow use_instead
|
|
user = PROTOCOLS_BY_KIND[key.kind()].get_by_id(
|
|
key.id(), allow_opt_out=allow_opt_out)
|
|
|
|
# send
|
|
delay = ''
|
|
if request.headers.get('X-AppEngine-TaskRetryCount') == '0' and obj.created:
|
|
delay_s = int((util.now().replace(tzinfo=None) - obj.created).total_seconds())
|
|
delay = f'({delay_s} s behind)'
|
|
logger.info(f'Sending {obj.source_protocol} {obj.type} {obj.key.id()} to {protocol} {url} {delay}')
|
|
logger.debug(f' AS1: {json_dumps(obj.as1, indent=2)}')
|
|
sent = None
|
|
try:
|
|
sent = PROTOCOLS[protocol].send(obj, url, from_user=user,
|
|
orig_obj_id=form.get('orig_obj_id'))
|
|
except BaseException as e:
|
|
code, body = util.interpret_http_exception(e)
|
|
if not code and not body:
|
|
raise
|
|
|
|
if sent is False:
|
|
logger.info(f'Failed sending!')
|
|
|
|
return '', 200 if sent else 204 if sent is False else 304
|