kopia lustrzana https://github.com/jointakahe/takahe
1218 wiersze
45 KiB
Python
1218 wiersze
45 KiB
Python
import datetime
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import json
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import logging
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import mimetypes
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import ssl
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from collections.abc import Iterable
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from typing import Optional
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from urllib.parse import urlparse
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import httpx
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import urlman
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from django.conf import settings
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from django.contrib.postgres.indexes import GinIndex
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from django.contrib.postgres.search import SearchVector
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from django.db import models, transaction
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from django.db.utils import IntegrityError
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from django.template import loader
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from django.template.defaultfilters import linebreaks_filter
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from django.utils import timezone
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from pyld.jsonld import JsonLdError
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from activities.models.emoji import Emoji
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from activities.models.fan_out import FanOut
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from activities.models.hashtag import Hashtag, HashtagStates
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from activities.models.post_types import (
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PostTypeData,
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PostTypeDataDecoder,
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PostTypeDataEncoder,
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QuestionData,
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)
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from core.exceptions import ActivityPubFormatError
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from core.html import ContentRenderer, FediverseHtmlParser
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from core.ld import (
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canonicalise,
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format_ld_date,
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get_list,
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get_value_or_map,
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parse_ld_date,
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)
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from core.snowflake import Snowflake
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from stator.exceptions import TryAgainLater
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from stator.models import State, StateField, StateGraph, StatorModel
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from users.models.follow import FollowStates
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from users.models.hashtag_follow import HashtagFollow
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from users.models.identity import Identity, IdentityStates
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from users.models.inbox_message import InboxMessage
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from users.models.system_actor import SystemActor
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class PostStates(StateGraph):
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new = State(try_interval=300)
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fanned_out = State(externally_progressed=True)
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deleted = State(try_interval=300)
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deleted_fanned_out = State(delete_after=86400)
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edited = State(try_interval=300)
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edited_fanned_out = State(externally_progressed=True)
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new.transitions_to(fanned_out)
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fanned_out.transitions_to(deleted_fanned_out)
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fanned_out.transitions_to(deleted)
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fanned_out.transitions_to(edited)
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deleted.transitions_to(deleted_fanned_out)
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edited.transitions_to(edited_fanned_out)
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edited_fanned_out.transitions_to(edited)
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edited_fanned_out.transitions_to(deleted)
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@classmethod
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def targets_fan_out(cls, post: "Post", type_: str) -> None:
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# Fan out to each target
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for follow in post.get_targets():
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FanOut.objects.create(
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identity=follow,
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type=type_,
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subject_post=post,
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)
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@classmethod
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def handle_new(cls, instance: "Post"):
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"""
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Creates all needed fan-out objects for a new Post.
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"""
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# Only fan out if the post was published in the last day or it's local
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# (we don't want to fan out anything older that that which is remote)
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if instance.local or (timezone.now() - instance.published) < datetime.timedelta(
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days=1
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):
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cls.targets_fan_out(instance, FanOut.Types.post)
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instance.ensure_hashtags()
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return cls.fanned_out
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@classmethod
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def handle_fanned_out(cls, instance: "Post"):
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"""
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For remote posts, sees if we can delete them every so often.
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"""
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# Skip all of this if the horizon is zero
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if settings.SETUP.REMOTE_PRUNE_HORIZON <= 0:
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return
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# To be a candidate for deletion, a post must be remote and old enough
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if instance.local:
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return
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if instance.created > timezone.now() - datetime.timedelta(
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days=settings.SETUP.REMOTE_PRUNE_HORIZON
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):
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return
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# It must have no local interactions
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if instance.interactions.filter(identity__local=True).exists():
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return
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# OK, delete it!
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instance.delete()
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return cls.deleted_fanned_out
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@classmethod
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def handle_deleted(cls, instance: "Post"):
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"""
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Creates all needed fan-out objects needed to delete a Post.
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"""
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cls.targets_fan_out(instance, FanOut.Types.post_deleted)
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return cls.deleted_fanned_out
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@classmethod
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def handle_edited(cls, instance: "Post"):
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"""
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Creates all needed fan-out objects for an edited Post.
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"""
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cls.targets_fan_out(instance, FanOut.Types.post_edited)
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instance.ensure_hashtags()
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return cls.edited_fanned_out
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class PostQuerySet(models.QuerySet):
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def not_hidden(self):
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query = self.exclude(
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state__in=[PostStates.deleted, PostStates.deleted_fanned_out]
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)
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return query
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def public(self, include_replies: bool = False):
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query = self.filter(
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visibility__in=[
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Post.Visibilities.public,
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Post.Visibilities.local_only,
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],
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)
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if not include_replies:
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return query.filter(in_reply_to__isnull=True)
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return query
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def local_public(self, include_replies: bool = False):
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query = self.filter(
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visibility__in=[
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Post.Visibilities.public,
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Post.Visibilities.local_only,
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],
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local=True,
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)
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if not include_replies:
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return query.filter(in_reply_to__isnull=True)
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return query
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def unlisted(self, include_replies: bool = False):
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query = self.filter(
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visibility__in=[
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Post.Visibilities.public,
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Post.Visibilities.local_only,
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Post.Visibilities.unlisted,
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],
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)
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if not include_replies:
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return query.filter(in_reply_to__isnull=True)
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return query
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def visible_to(self, identity: Identity | None, include_replies: bool = False):
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if identity is None:
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return self.unlisted(include_replies=include_replies)
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query = self.filter(
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models.Q(
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visibility__in=[
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Post.Visibilities.public,
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Post.Visibilities.local_only,
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Post.Visibilities.unlisted,
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]
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)
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| models.Q(
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visibility=Post.Visibilities.followers,
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author__inbound_follows__source=identity,
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)
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| models.Q(
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mentions=identity,
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)
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| models.Q(author=identity)
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).distinct()
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if not include_replies:
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return query.filter(in_reply_to__isnull=True)
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return query
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def tagged_with(self, hashtag: str | Hashtag):
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if isinstance(hashtag, str):
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tag_q = models.Q(hashtags__contains=hashtag)
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else:
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tag_q = models.Q(hashtags__contains=hashtag.hashtag)
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if hashtag.aliases:
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for alias in hashtag.aliases:
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tag_q |= models.Q(hashtags__contains=alias)
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return self.filter(tag_q)
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class PostManager(models.Manager):
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def get_queryset(self):
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return PostQuerySet(self.model, using=self._db)
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def not_hidden(self):
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return self.get_queryset().not_hidden()
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def public(self, include_replies: bool = False):
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return self.get_queryset().public(include_replies=include_replies)
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def local_public(self, include_replies: bool = False):
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return self.get_queryset().local_public(include_replies=include_replies)
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def unlisted(self, include_replies: bool = False):
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return self.get_queryset().unlisted(include_replies=include_replies)
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def tagged_with(self, hashtag: str | Hashtag):
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return self.get_queryset().tagged_with(hashtag=hashtag)
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class Post(StatorModel):
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"""
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A post (status, toot) that is either local or remote.
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"""
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class Visibilities(models.IntegerChoices):
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public = 0
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local_only = 4
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unlisted = 1
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followers = 2
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mentioned = 3
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class Types(models.TextChoices):
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article = "Article"
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audio = "Audio"
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event = "Event"
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image = "Image"
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note = "Note"
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page = "Page"
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question = "Question"
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video = "Video"
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id = models.BigIntegerField(primary_key=True, default=Snowflake.generate_post)
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# The author (attributedTo) of the post
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author = models.ForeignKey(
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"users.Identity",
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on_delete=models.CASCADE,
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related_name="posts",
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)
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# The state the post is in
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state = StateField(PostStates)
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# If it is our post or not
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local = models.BooleanField()
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# The canonical object ID
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object_uri = models.CharField(max_length=2048, blank=True, null=True, unique=True)
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# Who should be able to see this Post
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visibility = models.IntegerField(
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choices=Visibilities.choices,
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default=Visibilities.public,
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)
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# The main (HTML) content
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content = models.TextField()
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type = models.CharField(
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max_length=20,
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choices=Types.choices,
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default=Types.note,
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)
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type_data = models.JSONField(
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blank=True, null=True, encoder=PostTypeDataEncoder, decoder=PostTypeDataDecoder
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)
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# If the contents of the post are sensitive, and the summary (content
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# warning) to show if it is
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sensitive = models.BooleanField(default=False)
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summary = models.TextField(blank=True, null=True)
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# The public, web URL of this Post on the original server
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url = models.CharField(max_length=2048, blank=True, null=True)
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# The Post it is replying to as an AP ID URI
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# (as otherwise we'd have to pull entire threads to use IDs)
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in_reply_to = models.CharField(max_length=500, blank=True, null=True, db_index=True)
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# The identities the post is directly to (who can see it if not public)
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to = models.ManyToManyField(
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"users.Identity",
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related_name="posts_to",
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blank=True,
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)
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# The identities mentioned in the post
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mentions = models.ManyToManyField(
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"users.Identity",
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related_name="posts_mentioning",
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blank=True,
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)
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# Hashtags in the post
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hashtags = models.JSONField(blank=True, null=True)
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emojis = models.ManyToManyField(
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"activities.Emoji",
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related_name="posts_using_emoji",
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blank=True,
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)
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# Like/Boost/etc counts
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stats = models.JSONField(blank=True, null=True)
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# When the post was originally created (as opposed to when we received it)
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published = models.DateTimeField(default=timezone.now)
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# If the post has been edited after initial publication
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edited = models.DateTimeField(blank=True, null=True)
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created = models.DateTimeField(auto_now_add=True)
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updated = models.DateTimeField(auto_now=True)
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objects = PostManager()
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class Meta:
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indexes = [
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GinIndex(fields=["hashtags"], name="hashtags_gin"),
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GinIndex(
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SearchVector("content", config="english"),
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name="content_vector_gin",
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),
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models.Index(
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fields=["visibility", "local", "published"],
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name="ix_post_local_public_published",
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),
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models.Index(
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fields=["visibility", "local", "created"],
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name="ix_post_local_public_created",
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),
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]
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class urls(urlman.Urls):
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view = "{self.author.urls.view}posts/{self.id}/"
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object_uri = "{self.author.actor_uri}posts/{self.id}/"
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action_like = "{view}like/"
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action_unlike = "{view}unlike/"
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action_boost = "{view}boost/"
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action_unboost = "{view}unboost/"
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action_bookmark = "{view}bookmark/"
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action_unbookmark = "{view}unbookmark/"
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action_delete = "{view}delete/"
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action_edit = "{view}edit/"
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action_report = "{view}report/"
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action_reply = "/compose/?reply_to={self.id}"
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admin_edit = "/djadmin/activities/post/{self.id}/change/"
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def get_scheme(self, url):
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return "https"
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def get_hostname(self, url):
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return self.instance.author.domain.uri_domain
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def __str__(self):
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return f"{self.author} #{self.id}"
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def get_absolute_url(self):
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return self.urls.view
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def absolute_object_uri(self):
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"""
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Returns an object URI that is always absolute, for sending out to
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other servers.
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"""
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if self.local:
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return self.author.absolute_profile_uri() + f"posts/{self.id}/"
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else:
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return self.object_uri
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def in_reply_to_post(self) -> Optional["Post"]:
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"""
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Returns the actual Post object we're replying to, if we can find it
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"""
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if self.in_reply_to is None:
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return None
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return (
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Post.objects.filter(object_uri=self.in_reply_to)
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.select_related("author")
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.first()
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)
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### Content cleanup and extraction ###
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def clean_type_data(self, value):
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PostTypeData.parse_obj(value)
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def _safe_content_note(self, *, local: bool = True):
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return ContentRenderer(local=local).render_post(self.content, self)
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def _safe_content_question(self, *, local: bool = True):
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if local:
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context = {
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"post": self,
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"sanitized_content": self._safe_content_note(local=local),
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"local_display": local,
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}
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return loader.render_to_string("activities/_type_question.html", context)
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else:
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return ContentRenderer(local=local).render_post(self.content, self)
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def _safe_content_typed(self, *, local: bool = True):
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context = {
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"post": self,
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"sanitized_content": self._safe_content_note(local=local),
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"local_display": local,
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}
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return loader.render_to_string(
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(
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f"activities/_type_{self.type.lower()}.html",
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"activities/_type_unknown.html",
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),
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context,
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)
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def safe_content(self, *, local: bool = True):
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func = getattr(
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self, f"_safe_content_{self.type.lower()}", self._safe_content_typed
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)
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if callable(func):
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return func(local=local)
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return self._safe_content_note(local=local) # fallback
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|
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def safe_content_local(self):
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"""
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Returns the content formatted for local display
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"""
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return self.safe_content(local=True)
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|
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def safe_content_remote(self):
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"""
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Returns the content formatted for remote consumption
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"""
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return self.safe_content(local=False)
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|
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def summary_class(self) -> str:
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"""
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Returns a CSS class name to identify this summary value
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"""
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if not self.summary:
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return ""
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return "summary-{self.id}"
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|
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@property
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def stats_with_defaults(self):
|
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"""
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Returns the stats dict with counts of likes/etc. in it
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"""
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return {
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"likes": self.stats.get("likes", 0) if self.stats else 0,
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"boosts": self.stats.get("boosts", 0) if self.stats else 0,
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"replies": self.stats.get("replies", 0) if self.stats else 0,
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}
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|
|
### Local creation/editing ###
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|
|
@classmethod
|
|
def create_local(
|
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cls,
|
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author: Identity,
|
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content: str,
|
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summary: str | None = None,
|
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sensitive: bool = False,
|
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visibility: int = Visibilities.public,
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reply_to: Optional["Post"] = None,
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attachments: list | None = None,
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question: dict | None = None,
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) -> "Post":
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with transaction.atomic():
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# Find mentions in this post
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mentions = cls.mentions_from_content(content, author)
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if reply_to:
|
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mentions.add(reply_to.author)
|
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# Maintain local-only for replies
|
|
if reply_to.visibility == reply_to.Visibilities.local_only:
|
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visibility = reply_to.Visibilities.local_only
|
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# Find emoji in this post
|
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emojis = Emoji.emojis_from_content(content, None)
|
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# Strip all unwanted HTML and apply linebreaks filter, grabbing hashtags on the way
|
|
parser = FediverseHtmlParser(linebreaks_filter(content), find_hashtags=True)
|
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content = parser.html
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hashtags = (
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sorted([tag[: Hashtag.MAXIMUM_LENGTH] for tag in parser.hashtags])
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or None
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)
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# Make the Post object
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post = cls.objects.create(
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author=author,
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content=content,
|
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summary=summary or None,
|
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sensitive=bool(summary) or sensitive,
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local=True,
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visibility=visibility,
|
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hashtags=hashtags,
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in_reply_to=reply_to.object_uri if reply_to else None,
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)
|
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post.object_uri = post.urls.object_uri
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post.url = post.absolute_object_uri()
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post.mentions.set(mentions)
|
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post.emojis.set(emojis)
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if attachments:
|
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post.attachments.set(attachments)
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if question:
|
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post.type = question["type"]
|
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post.type_data = PostTypeData(__root__=question).__root__
|
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post.save()
|
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# Recalculate parent stats for replies
|
|
if reply_to:
|
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reply_to.calculate_stats()
|
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return post
|
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|
|
def edit_local(
|
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self,
|
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content: str,
|
|
summary: str | None = None,
|
|
sensitive: bool | None = None,
|
|
visibility: int = Visibilities.public,
|
|
attachments: list | None = None,
|
|
attachment_attributes: list | None = None,
|
|
):
|
|
with transaction.atomic():
|
|
# Strip all HTML and apply linebreaks filter
|
|
parser = FediverseHtmlParser(linebreaks_filter(content), find_hashtags=True)
|
|
self.content = parser.html
|
|
self.hashtags = (
|
|
sorted([tag[: Hashtag.MAXIMUM_LENGTH] for tag in parser.hashtags])
|
|
or None
|
|
)
|
|
self.summary = summary or None
|
|
self.sensitive = bool(summary) if sensitive is None else sensitive
|
|
self.visibility = visibility
|
|
self.edited = timezone.now()
|
|
self.mentions.set(self.mentions_from_content(content, self.author))
|
|
self.emojis.set(Emoji.emojis_from_content(content, None))
|
|
self.attachments.set(attachments or [])
|
|
self.save()
|
|
|
|
for attrs in attachment_attributes or []:
|
|
attachment = next(
|
|
(a for a in attachments or [] if str(a.id) == attrs.id), None
|
|
)
|
|
if attachment is None:
|
|
continue
|
|
attachment.name = attrs.description
|
|
attachment.save()
|
|
|
|
self.transition_perform(PostStates.edited)
|
|
|
|
@classmethod
|
|
def mentions_from_content(cls, content, author) -> set[Identity]:
|
|
mention_hits = FediverseHtmlParser(content, find_mentions=True).mentions
|
|
mentions = set()
|
|
for handle in mention_hits:
|
|
handle = handle.lower()
|
|
if "@" in handle:
|
|
username, domain = handle.split("@", 1)
|
|
else:
|
|
username = handle
|
|
domain = author.domain_id
|
|
identity = Identity.by_username_and_domain(
|
|
username=username,
|
|
domain=domain,
|
|
fetch=True,
|
|
)
|
|
if identity is not None:
|
|
mentions.add(identity)
|
|
return mentions
|
|
|
|
def ensure_hashtags(self) -> None:
|
|
"""
|
|
Ensure any of the already parsed hashtags from this Post
|
|
have a corresponding Hashtag record.
|
|
"""
|
|
# Ensure hashtags
|
|
if self.hashtags:
|
|
for hashtag in self.hashtags:
|
|
tag, _ = Hashtag.objects.get_or_create(
|
|
hashtag=hashtag[: Hashtag.MAXIMUM_LENGTH],
|
|
)
|
|
tag.transition_perform(HashtagStates.outdated)
|
|
|
|
def calculate_stats(self, save=True):
|
|
"""
|
|
Recalculates our stats dict
|
|
"""
|
|
from activities.models import PostInteraction, PostInteractionStates
|
|
|
|
self.stats = {
|
|
"likes": self.interactions.filter(
|
|
type=PostInteraction.Types.like,
|
|
state__in=PostInteractionStates.group_active(),
|
|
).count(),
|
|
"boosts": self.interactions.filter(
|
|
type=PostInteraction.Types.boost,
|
|
state__in=PostInteractionStates.group_active(),
|
|
).count(),
|
|
"replies": Post.objects.filter(in_reply_to=self.object_uri).count(),
|
|
}
|
|
if save:
|
|
self.save()
|
|
|
|
def calculate_type_data(self, save=True):
|
|
"""
|
|
Recalculate type_data (used mostly for poll votes)
|
|
"""
|
|
from activities.models import PostInteraction
|
|
|
|
if self.local and isinstance(self.type_data, QuestionData):
|
|
self.type_data.voter_count = (
|
|
self.interactions.filter(
|
|
type=PostInteraction.Types.vote,
|
|
)
|
|
.values("identity")
|
|
.distinct()
|
|
.count()
|
|
)
|
|
|
|
for option in self.type_data.options:
|
|
option.votes = self.interactions.filter(
|
|
type=PostInteraction.Types.vote,
|
|
value=option.name,
|
|
).count()
|
|
if save:
|
|
self.save()
|
|
|
|
### ActivityPub (outbound) ###
|
|
|
|
def to_ap(self) -> dict:
|
|
"""
|
|
Returns the AP JSON for this object
|
|
"""
|
|
self.author.ensure_uris()
|
|
value = {
|
|
"to": [],
|
|
"cc": [],
|
|
"type": self.type,
|
|
"id": self.object_uri,
|
|
"published": format_ld_date(self.published),
|
|
"attributedTo": self.author.actor_uri,
|
|
"content": self.safe_content_remote(),
|
|
"sensitive": self.sensitive,
|
|
"url": self.absolute_object_uri(),
|
|
"tag": [],
|
|
"attachment": [],
|
|
}
|
|
if self.type == Post.Types.question and self.type_data:
|
|
value[self.type_data.mode] = [
|
|
{
|
|
"name": option.name,
|
|
"type": option.type,
|
|
"replies": {"type": "Collection", "totalItems": option.votes},
|
|
}
|
|
for option in self.type_data.options
|
|
]
|
|
value["toot:votersCount"] = self.type_data.voter_count
|
|
if self.type_data.end_time:
|
|
value["endTime"] = format_ld_date(self.type_data.end_time)
|
|
if self.summary:
|
|
value["summary"] = self.summary
|
|
if self.in_reply_to:
|
|
value["inReplyTo"] = self.in_reply_to
|
|
if self.edited:
|
|
value["updated"] = format_ld_date(self.edited)
|
|
# Targeting
|
|
if self.visibility == self.Visibilities.public:
|
|
value["to"].append("as:Public")
|
|
elif self.visibility == self.Visibilities.unlisted:
|
|
value["cc"].append("as:Public")
|
|
elif (
|
|
self.visibility == self.Visibilities.followers and self.author.followers_uri
|
|
):
|
|
value["to"].append(self.author.followers_uri)
|
|
# Mentions
|
|
for mention in self.mentions.all():
|
|
value["tag"].append(mention.to_ap_tag())
|
|
value["cc"].append(mention.actor_uri)
|
|
# Hashtags
|
|
for hashtag in self.hashtags or []:
|
|
value["tag"].append(
|
|
{
|
|
"href": f"https://{self.author.domain.uri_domain}/tags/{hashtag}/",
|
|
"name": f"#{hashtag}",
|
|
"type": "Hashtag",
|
|
}
|
|
)
|
|
# Emoji
|
|
for emoji in self.emojis.all():
|
|
value["tag"].append(emoji.to_ap_tag())
|
|
# Attachments
|
|
for attachment in self.attachments.all():
|
|
value["attachment"].append(attachment.to_ap())
|
|
# Remove fields if they're empty
|
|
for field in ["to", "cc", "tag", "attachment"]:
|
|
if not value[field]:
|
|
del value[field]
|
|
return value
|
|
|
|
def to_create_ap(self):
|
|
"""
|
|
Returns the AP JSON to create this object
|
|
"""
|
|
object = self.to_ap()
|
|
return {
|
|
"to": object.get("to", []),
|
|
"cc": object.get("cc", []),
|
|
"type": "Create",
|
|
"id": self.object_uri + "#create",
|
|
"actor": self.author.actor_uri,
|
|
"object": object,
|
|
}
|
|
|
|
def to_update_ap(self):
|
|
"""
|
|
Returns the AP JSON to update this object
|
|
"""
|
|
object = self.to_ap()
|
|
return {
|
|
"to": object.get("to", []),
|
|
"cc": object.get("cc", []),
|
|
"type": "Update",
|
|
"id": self.object_uri + "#update",
|
|
"actor": self.author.actor_uri,
|
|
"object": object,
|
|
}
|
|
|
|
def to_delete_ap(self):
|
|
"""
|
|
Returns the AP JSON to create this object
|
|
"""
|
|
object = self.to_ap()
|
|
return {
|
|
"to": object.get("to", []),
|
|
"cc": object.get("cc", []),
|
|
"type": "Delete",
|
|
"id": self.object_uri + "#delete",
|
|
"actor": self.author.actor_uri,
|
|
"object": object,
|
|
}
|
|
|
|
def get_targets(self) -> Iterable[Identity]:
|
|
"""
|
|
Returns a list of Identities that need to see posts and their changes
|
|
"""
|
|
targets = set()
|
|
for mention in self.mentions.all():
|
|
targets.add(mention)
|
|
# Then, if it's not mentions only, also deliver to followers and all hashtag followers
|
|
if self.visibility != Post.Visibilities.mentioned:
|
|
for follower in self.author.inbound_follows.filter(
|
|
state__in=FollowStates.group_active()
|
|
).select_related("source"):
|
|
targets.add(follower.source)
|
|
if self.hashtags:
|
|
for follow in HashtagFollow.objects.by_hashtags(
|
|
self.hashtags
|
|
).prefetch_related("identity"):
|
|
targets.add(follow.identity)
|
|
|
|
# If it's a reply, always include the original author if we know them
|
|
reply_post = self.in_reply_to_post()
|
|
if reply_post:
|
|
targets.add(reply_post.author)
|
|
# And if it's a reply to one of our own, we have to re-fan-out to
|
|
# the original author's followers
|
|
if reply_post.author.local:
|
|
for follower in reply_post.author.inbound_follows.filter(
|
|
state__in=FollowStates.group_active()
|
|
).select_related("source"):
|
|
targets.add(follower.source)
|
|
# If this is a remote post or local-only, filter to only include
|
|
# local identities
|
|
if not self.local or self.visibility == Post.Visibilities.local_only:
|
|
targets = {target for target in targets if target.local}
|
|
# If it's a local post, include the author
|
|
if self.local:
|
|
targets.add(self.author)
|
|
# Fetch the author's full blocks and remove them as targets
|
|
blocks = (
|
|
self.author.outbound_blocks.active()
|
|
.filter(mute=False)
|
|
.select_related("target")
|
|
)
|
|
for block in blocks:
|
|
try:
|
|
targets.remove(block.target)
|
|
except KeyError:
|
|
pass
|
|
# Now dedupe the targets based on shared inboxes (we only keep one per
|
|
# shared inbox)
|
|
deduped_targets = set()
|
|
shared_inboxes = set()
|
|
for target in targets:
|
|
if target.local or not target.shared_inbox_uri:
|
|
deduped_targets.add(target)
|
|
elif target.shared_inbox_uri not in shared_inboxes:
|
|
shared_inboxes.add(target.shared_inbox_uri)
|
|
deduped_targets.add(target)
|
|
else:
|
|
# Their shared inbox is already being sent to
|
|
pass
|
|
return deduped_targets
|
|
|
|
### ActivityPub (inbound) ###
|
|
|
|
@classmethod
|
|
def by_ap(cls, data, create=False, update=False, fetch_author=False) -> "Post":
|
|
"""
|
|
Retrieves a Post instance by its ActivityPub JSON object.
|
|
|
|
Optionally creates one if it's not present.
|
|
Raises DoesNotExist if it's not found and create is False,
|
|
or it's from a blocked domain.
|
|
"""
|
|
try:
|
|
# Ensure data has the primary fields of all Posts
|
|
if (
|
|
not isinstance(data["id"], str)
|
|
or not isinstance(data["attributedTo"], str)
|
|
or not isinstance(data["type"], str)
|
|
):
|
|
raise TypeError()
|
|
# Ensure the domain of the object's actor and ID match to prevent injection
|
|
if urlparse(data["id"]).hostname != urlparse(data["attributedTo"]).hostname:
|
|
raise ValueError("Object's ID domain is different to its author")
|
|
except (TypeError, KeyError) as ex:
|
|
raise cls.DoesNotExist(
|
|
"Object data is not a recognizable ActivityPub object"
|
|
) from ex
|
|
|
|
# Do we have one with the right ID?
|
|
created = False
|
|
try:
|
|
post: Post = cls.objects.select_related("author__domain").get(
|
|
object_uri=data["id"]
|
|
)
|
|
except cls.DoesNotExist:
|
|
if create:
|
|
# Resolve the author
|
|
author = Identity.by_actor_uri(data["attributedTo"], create=create)
|
|
# If the author is not fetched yet, try again later
|
|
if author.domain is None:
|
|
if fetch_author:
|
|
if not author.fetch_actor() or author.domain is None:
|
|
raise TryAgainLater()
|
|
else:
|
|
raise TryAgainLater()
|
|
# If the post is from a blocked domain, stop and drop
|
|
if author.domain.recursively_blocked():
|
|
raise cls.DoesNotExist("Post is from a blocked domain")
|
|
# parallelism may cause another simultaneous worker thread
|
|
# to try to create the same post - so watch for that and
|
|
# try to avoid failing the entire transaction
|
|
try:
|
|
# wrapped in a transaction to avoid breaking the outer
|
|
# transaction
|
|
with transaction.atomic():
|
|
post = cls.objects.create(
|
|
object_uri=data["id"],
|
|
author=author,
|
|
content="",
|
|
local=False,
|
|
type=data["type"],
|
|
)
|
|
created = True
|
|
except IntegrityError:
|
|
# despite previous checks, a parallel thread managed
|
|
# to create the same object already
|
|
raise TryAgainLater()
|
|
else:
|
|
raise cls.DoesNotExist(f"No post with ID {data['id']}", data)
|
|
if update or created:
|
|
post.type = data["type"]
|
|
post.url = data.get("url", data["id"])
|
|
if post.type in (cls.Types.article, cls.Types.question):
|
|
post.type_data = PostTypeData(__root__=data).__root__
|
|
try:
|
|
# apparently sometimes posts (Pages?) in the fediverse
|
|
# don't have content, but this shouldn't be a total failure
|
|
post.content = get_value_or_map(data, "content", "contentMap")
|
|
except ActivityPubFormatError as err:
|
|
logging.warning(f"{err} on {post.url}")
|
|
post.content = None
|
|
# Document types have names, not summaries
|
|
post.summary = data.get("summary") or data.get("name")
|
|
if not post.content and post.summary:
|
|
post.content = post.summary
|
|
post.summary = None
|
|
post.sensitive = data.get("sensitive", False)
|
|
post.published = parse_ld_date(data.get("published"))
|
|
post.edited = parse_ld_date(data.get("updated"))
|
|
post.in_reply_to = data.get("inReplyTo")
|
|
# Mentions and hashtags
|
|
post.hashtags = []
|
|
for tag in get_list(data, "tag"):
|
|
tag_type = tag["type"].lower()
|
|
if tag_type == "mention":
|
|
mention_identity = Identity.by_actor_uri(tag["href"], create=True)
|
|
post.mentions.add(mention_identity)
|
|
elif tag_type in ["_:hashtag", "hashtag"]:
|
|
# kbin produces tags with 'tag' instead of 'name'
|
|
if "tag" in tag and "name" not in tag:
|
|
name = get_value_or_map(tag, "tag", "tagMap")
|
|
else:
|
|
name = get_value_or_map(tag, "name", "nameMap")
|
|
post.hashtags.append(
|
|
name.lower().lstrip("#")[: Hashtag.MAXIMUM_LENGTH]
|
|
)
|
|
elif tag_type in ["toot:emoji", "emoji"]:
|
|
emoji = Emoji.by_ap_tag(post.author.domain, tag, create=True)
|
|
post.emojis.add(emoji)
|
|
else:
|
|
# Various ActivityPub implementations and proposals introduced tag
|
|
# types, e.g. Edition in Bookwyrm and Link in fep-e232 Object Links
|
|
# it should be safe to ignore (and log) them before a full support
|
|
pass
|
|
# Visibility and to
|
|
# (a post is public if it's to:public, otherwise it's unlisted if
|
|
# it's cc:public, otherwise it's more limited)
|
|
to = [x.lower() for x in get_list(data, "to")]
|
|
cc = [x.lower() for x in get_list(data, "cc")]
|
|
post.visibility = Post.Visibilities.mentioned
|
|
if "public" in to or "as:public" in to:
|
|
post.visibility = Post.Visibilities.public
|
|
elif "public" in cc or "as:public" in cc:
|
|
post.visibility = Post.Visibilities.unlisted
|
|
elif post.author.followers_uri in to:
|
|
post.visibility = Post.Visibilities.followers
|
|
# Attachments
|
|
# These have no IDs, so we have to wipe them each time
|
|
post.attachments.all().delete()
|
|
for attachment in get_list(data, "attachment"):
|
|
if "url" not in attachment and "href" in attachment:
|
|
# Links have hrefs, while other Objects have urls
|
|
attachment["url"] = attachment["href"]
|
|
if "focalPoint" in attachment:
|
|
try:
|
|
focal_x, focal_y = attachment["focalPoint"]
|
|
except (ValueError, TypeError):
|
|
focal_x, focal_y = None, None
|
|
else:
|
|
focal_x, focal_y = None, None
|
|
mimetype = attachment.get("mediaType")
|
|
if not mimetype or not isinstance(mimetype, str):
|
|
if "url" not in attachment:
|
|
raise ActivityPubFormatError(
|
|
f"No URL present on attachment in {post.url}"
|
|
)
|
|
mimetype, _ = mimetypes.guess_type(attachment["url"])
|
|
if not mimetype:
|
|
mimetype = "application/octet-stream"
|
|
post.attachments.create(
|
|
remote_url=attachment["url"],
|
|
mimetype=mimetype,
|
|
name=attachment.get("name"),
|
|
width=attachment.get("width"),
|
|
height=attachment.get("height"),
|
|
blurhash=attachment.get("blurhash"),
|
|
focal_x=focal_x,
|
|
focal_y=focal_y,
|
|
)
|
|
# Calculate stats in case we have existing replies
|
|
post.calculate_stats(save=False)
|
|
with transaction.atomic():
|
|
# if we don't commit the transaction here, there's a chance
|
|
# the parent fetch below goes into an infinite loop
|
|
post.save()
|
|
|
|
# Potentially schedule a fetch of the reply parent, and recalculate
|
|
# its stats if it's here already.
|
|
if post.in_reply_to:
|
|
try:
|
|
parent = cls.by_object_uri(post.in_reply_to)
|
|
except cls.DoesNotExist:
|
|
try:
|
|
cls.ensure_object_uri(post.in_reply_to, reason=post.object_uri)
|
|
except ValueError:
|
|
logging.warning(
|
|
f"Cannot fetch ancestor of Post={post.pk}, ancestor_uri={post.in_reply_to}"
|
|
)
|
|
else:
|
|
parent.calculate_stats()
|
|
return post
|
|
|
|
@classmethod
|
|
def by_object_uri(cls, object_uri, fetch=False) -> "Post":
|
|
"""
|
|
Gets the post by URI - either looking up locally, or fetching
|
|
from the other end if it's not here.
|
|
"""
|
|
try:
|
|
return cls.objects.get(object_uri=object_uri)
|
|
except cls.DoesNotExist:
|
|
if fetch:
|
|
try:
|
|
response = SystemActor().signed_request(
|
|
method="get", uri=object_uri
|
|
)
|
|
except (httpx.HTTPError, ssl.SSLCertVerificationError, ValueError):
|
|
raise cls.DoesNotExist(f"Could not fetch {object_uri}")
|
|
if response.status_code in [404, 410]:
|
|
raise cls.DoesNotExist(f"No post at {object_uri}")
|
|
if response.status_code >= 500:
|
|
raise cls.DoesNotExist(f"Server error fetching {object_uri}")
|
|
if response.status_code >= 400:
|
|
raise cls.DoesNotExist(
|
|
f"Error fetching post from {object_uri}: {response.status_code}",
|
|
{response.content},
|
|
)
|
|
try:
|
|
post = cls.by_ap(
|
|
canonicalise(response.json(), include_security=True),
|
|
create=True,
|
|
update=True,
|
|
fetch_author=True,
|
|
)
|
|
except (json.JSONDecodeError, ValueError, JsonLdError) as err:
|
|
raise cls.DoesNotExist(
|
|
f"Invalid ld+json response for {object_uri}"
|
|
) from err
|
|
# We may need to fetch the author too
|
|
if post.author.state == IdentityStates.outdated:
|
|
post.author.fetch_actor()
|
|
return post
|
|
else:
|
|
raise cls.DoesNotExist(f"Cannot find Post with URI {object_uri}")
|
|
|
|
@classmethod
|
|
def ensure_object_uri(cls, object_uri: str, reason: str | None = None):
|
|
"""
|
|
Sees if the post is in our local set, and if not, schedules a fetch
|
|
for it (in the background)
|
|
"""
|
|
if not object_uri or "://" not in object_uri:
|
|
raise ValueError("URI missing or invalid")
|
|
try:
|
|
cls.by_object_uri(object_uri)
|
|
except cls.DoesNotExist:
|
|
InboxMessage.create_internal(
|
|
{
|
|
"type": "FetchPost",
|
|
"object": object_uri,
|
|
"reason": reason,
|
|
}
|
|
)
|
|
|
|
@classmethod
|
|
def handle_create_ap(cls, data):
|
|
"""
|
|
Handles an incoming create request
|
|
"""
|
|
with transaction.atomic():
|
|
# Ensure the Create actor is the Post's attributedTo
|
|
if data["actor"] != data["object"]["attributedTo"]:
|
|
raise ValueError("Create actor does not match its Post object", data)
|
|
# Create it, stator will fan it out locally
|
|
cls.by_ap(data["object"], create=True, update=True, fetch_author=True)
|
|
|
|
@classmethod
|
|
def handle_update_ap(cls, data):
|
|
"""
|
|
Handles an incoming update request
|
|
"""
|
|
with transaction.atomic():
|
|
# Ensure the Create actor is the Post's attributedTo
|
|
if data["actor"] != data["object"]["attributedTo"]:
|
|
raise ValueError("Create actor does not match its Post object", data)
|
|
# Find it and update it
|
|
try:
|
|
cls.by_ap(data["object"], create=False, update=True)
|
|
except cls.DoesNotExist:
|
|
# We don't have a copy - assume we got a delete first and ignore.
|
|
pass
|
|
|
|
@classmethod
|
|
def handle_delete_ap(cls, data):
|
|
"""
|
|
Handles an incoming delete request
|
|
"""
|
|
with transaction.atomic():
|
|
# Is this an embedded object or plain ID?
|
|
if isinstance(data["object"], str):
|
|
object_uri = data["object"]
|
|
else:
|
|
object_uri = data["object"]["id"]
|
|
# Find our post by ID if we have one
|
|
try:
|
|
post = cls.by_object_uri(object_uri)
|
|
except cls.DoesNotExist:
|
|
# It's already been deleted
|
|
return
|
|
# Ensure the actor on the request authored the post
|
|
if not post.author.actor_uri == data["actor"]:
|
|
raise ValueError("Actor on delete does not match object")
|
|
post.delete()
|
|
|
|
@classmethod
|
|
def handle_fetch_internal(cls, data):
|
|
"""
|
|
Handles an internal fetch-request inbox message
|
|
"""
|
|
try:
|
|
uri = data["object"]
|
|
if "://" in uri:
|
|
cls.by_object_uri(uri, fetch=True)
|
|
except (cls.DoesNotExist, KeyError):
|
|
pass
|
|
|
|
### OpenGraph API ###
|
|
|
|
def to_opengraph_dict(self) -> dict:
|
|
return {
|
|
"og:title": f"{self.author.name} (@{self.author.handle})",
|
|
"og:type": "article",
|
|
"og:published_time": (self.published or self.created).isoformat(),
|
|
"og:modified_time": (
|
|
self.edited or self.published or self.created
|
|
).isoformat(),
|
|
"og:description": (self.summary or self.safe_content_local()),
|
|
"og:image:url": self.author.local_icon_url().absolute,
|
|
"og:image:height": 85,
|
|
"og:image:width": 85,
|
|
}
|
|
|
|
### Mastodon API ###
|
|
|
|
def to_mastodon_json(self, interactions=None, bookmarks=None, identity=None):
|
|
reply_parent = None
|
|
if self.in_reply_to:
|
|
# Load the PK and author.id explicitly to prevent a SELECT on the entire author Identity
|
|
reply_parent = (
|
|
Post.objects.filter(object_uri=self.in_reply_to)
|
|
.only("pk", "author_id")
|
|
.first()
|
|
)
|
|
visibility_mapping = {
|
|
self.Visibilities.public: "public",
|
|
self.Visibilities.unlisted: "unlisted",
|
|
self.Visibilities.followers: "private",
|
|
self.Visibilities.mentioned: "direct",
|
|
self.Visibilities.local_only: "public",
|
|
}
|
|
value = {
|
|
"id": self.pk,
|
|
"uri": self.object_uri,
|
|
"created_at": format_ld_date(self.published),
|
|
"account": self.author.to_mastodon_json(include_counts=False),
|
|
"content": self.safe_content_remote(),
|
|
"visibility": visibility_mapping[self.visibility],
|
|
"sensitive": self.sensitive,
|
|
"spoiler_text": self.summary or "",
|
|
"media_attachments": [
|
|
attachment.to_mastodon_json() for attachment in self.attachments.all()
|
|
],
|
|
"mentions": [
|
|
mention.to_mastodon_mention_json() for mention in self.mentions.all()
|
|
],
|
|
"tags": (
|
|
[
|
|
{
|
|
"name": tag,
|
|
"url": f"https://{self.author.domain.uri_domain}/tags/{tag}/",
|
|
}
|
|
for tag in self.hashtags
|
|
]
|
|
if self.hashtags
|
|
else []
|
|
),
|
|
# Filter in the list comp rather than query because the common case is no emoji in the resultset
|
|
# When filter is on emojis like `emojis.usable()` it causes a query that is not cached by prefetch_related
|
|
"emojis": [
|
|
emoji.to_mastodon_json()
|
|
for emoji in self.emojis.all()
|
|
if emoji.is_usable
|
|
],
|
|
"reblogs_count": self.stats_with_defaults["boosts"],
|
|
"favourites_count": self.stats_with_defaults["likes"],
|
|
"replies_count": self.stats_with_defaults["replies"],
|
|
"url": self.absolute_object_uri(),
|
|
"in_reply_to_id": reply_parent.pk if reply_parent else None,
|
|
"in_reply_to_account_id": (
|
|
reply_parent.author_id if reply_parent else None
|
|
),
|
|
"reblog": None,
|
|
"poll": self.type_data.to_mastodon_json(self, identity)
|
|
if isinstance(self.type_data, QuestionData)
|
|
else None,
|
|
"card": None,
|
|
"language": None,
|
|
"text": self.safe_content_remote(),
|
|
"edited_at": format_ld_date(self.edited) if self.edited else None,
|
|
}
|
|
if interactions:
|
|
value["favourited"] = self.pk in interactions.get("like", [])
|
|
value["reblogged"] = self.pk in interactions.get("boost", [])
|
|
value["pinned"] = self.pk in interactions.get("pin", [])
|
|
if bookmarks:
|
|
value["bookmarked"] = self.pk in bookmarks
|
|
return value
|