279 lines
10 KiB
Python
279 lines
10 KiB
Python
import json
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import logging
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import os
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import random
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import requests
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from celery import Celery
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from little_boxes import activitypub as ap
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from little_boxes.errors import ActivityGoneError
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from little_boxes.errors import ActivityNotFoundError
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from little_boxes.errors import NotAnActivityError
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from little_boxes.httpsig import HTTPSigAuth
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from little_boxes.linked_data_sig import generate_signature
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from requests.exceptions import HTTPError
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import activitypub
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from config import DB
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from config import HEADERS
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from config import ID
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from config import KEY
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from config import MEDIA_CACHE
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from config import USER_AGENT
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from utils import opengraph
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from utils.media import Kind
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log = logging.getLogger(__name__)
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app = Celery(
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"tasks", broker=os.getenv("MICROBLOGPUB_AMQP_BROKER", "pyamqp://guest@localhost//")
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)
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SigAuth = HTTPSigAuth(KEY)
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back = activitypub.MicroblogPubBackend()
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ap.use_backend(back)
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@app.task(bind=True, max_retries=12) # noqa: C901
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def process_new_activity(self, iri: str) -> None:
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"""Process an activity received in the inbox"""
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try:
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activity = ap.fetch_remote_activity(iri)
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log.info(f"activity={activity!r}")
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# Is the activity expected?
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# following = ap.get_backend().following()
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should_forward = False
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should_delete = False
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tag_stream = False
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if activity.has_type(ap.ActivityType.ANNOUNCE):
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tag_stream = True
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try:
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activity.get_object()
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except NotAnActivityError:
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# Most likely on OStatus notice
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tag_stream = False
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should_delete = True
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elif activity.has_type(ap.ActivityType.CREATE):
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note = activity.get_object()
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# Make the note part of the stream if it's not a reply, or if it's a local reply
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if not note.inReplyTo or note.inReplyTo.startswith(ID):
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tag_stream = True
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if note.inReplyTo:
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try:
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reply = ap.fetch_remote_activity(note.inReplyTo)
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if (
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reply.id.startswith(ID) or reply.has_mention(ID)
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) and activity.is_public():
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# The reply is public "local reply", forward the reply (i.e. the original activity) to the
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# original recipients
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should_forward = True
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except NotAnActivityError:
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# Most likely a reply to an OStatus notce
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should_delete = True
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# (partial) Ghost replies handling
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# [X] This is the first time the server has seen this Activity.
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should_forward = False
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local_followers = ID + "/followers"
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for field in ["to", "cc"]:
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if field in activity._data:
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if local_followers in activity._data[field]:
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# [X] The values of to, cc, and/or audience contain a Collection owned by the server.
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should_forward = True
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# [X] The values of inReplyTo, object, target and/or tag are objects owned by the server
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if not (note.inReplyTo and note.inReplyTo.startswith(ID)):
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should_forward = False
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elif activity.has_type(ap.ActivityType.DELETE):
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note = DB.activities.find_one(
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{"activity.object.id": activity.get_object().id}
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)
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if note and note["meta"].get("forwarded", False):
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# If the activity was originally forwarded, forward the delete too
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should_forward = True
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if should_forward:
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log.info(f"will forward {activity!r} to followers")
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activity.forward(back.followers_as_recipients())
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if should_delete:
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log.info(f"will soft delete {activity!r}")
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log.info(f"{iri} tag_stream={tag_stream}")
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DB.activities.update_one(
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{"remote_id": activity.id},
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{
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"$set": {
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"meta.stream": tag_stream,
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"meta.forwarded": should_forward,
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"meta.deleted": should_delete,
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}
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},
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)
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log.info(f"new activity {iri} processed")
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if not should_delete:
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cache_actor.delay(iri)
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except (ActivityGoneError, ActivityNotFoundError):
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log.exception(f"dropping activity {iri}, skip processing")
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except Exception as err:
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log.exception(f"failed to process new activity {iri}")
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self.retry(exc=err, countdown=int(random.uniform(2, 4) ** self.request.retries))
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@app.task(bind=True, max_retries=12) # noqa: C901
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def fetch_og_metadata(self, iri: str) -> None:
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try:
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activity = ap.fetch_remote_activity(iri)
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log.info(f"activity={activity!r}")
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if activity.has_type(ap.ActivityType.CREATE):
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note = activity.get_object()
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links = opengraph.links_from_note(note.to_dict())
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og_metadata = opengraph.fetch_og_metadata(USER_AGENT, links)
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for og in og_metadata:
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if not og.get("image"):
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continue
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MEDIA_CACHE.cache_og_image(og["image"])
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log.debug(f"OG metadata {og_metadata!r}")
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DB.activities.update_one(
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{"remote_id": iri}, {"$set": {"meta.og_metadata": og_metadata}}
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)
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log.info(f"OG metadata fetched for {iri}")
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except (ActivityGoneError, ActivityNotFoundError):
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log.exception(f"dropping activity {iri}, skip OG metedata")
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except requests.exceptions.HTTPError as http_err:
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if 400 <= http_err.response.status_code < 500:
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log.exception("bad request, no retry")
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log.exception("failed to fetch OG metadata")
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self.retry(
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exc=http_err, countdown=int(random.uniform(2, 4) ** self.request.retries)
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)
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except Exception as err:
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log.exception(f"failed to fetch OG metadata for {iri}")
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self.retry(exc=err, countdown=int(random.uniform(2, 4) ** self.request.retries))
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@app.task(bind=True, max_retries=12)
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def cache_actor(self, iri: str, also_cache_attachments: bool = True) -> None:
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try:
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activity = ap.fetch_remote_activity(iri)
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log.info(f"activity={activity!r}")
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if activity.has_type(ap.ActivityType.CREATE):
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fetch_og_metadata.delay(iri)
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actor = activity.get_actor()
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cache_actor_with_inbox = False
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if activity.has_type(ap.ActivityType.FOLLOW):
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if actor.id != ID:
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# It's a Follow from the Inbox
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cache_actor_with_inbox = True
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else:
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# It's a new following, cache the "object" (which is the actor we follow)
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DB.activities.update_one(
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{"remote_id": iri},
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{
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"$set": {
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"meta.object": activitypub._actor_to_meta(
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activity.get_object()
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)
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}
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},
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)
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# Cache the actor info
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DB.activities.update_one(
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{"remote_id": iri},
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{
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"$set": {
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"meta.actor": activitypub._actor_to_meta(
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actor, cache_actor_with_inbox
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)
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}
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},
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)
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log.info(f"actor cached for {iri}")
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if also_cache_attachments:
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cache_attachments.delay(iri)
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except (ActivityGoneError, ActivityNotFoundError):
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DB.activities.update_one({"remote_id": iri}, {"$set": {"meta.deleted": True}})
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log.exception(f"flagging activity {iri} as deleted, no actor caching")
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except Exception as err:
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log.exception(f"failed to cache actor for {iri}")
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self.retry(exc=err, countdown=int(random.uniform(2, 4) ** self.request.retries))
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@app.task(bind=True, max_retries=12)
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def cache_attachments(self, iri: str) -> None:
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try:
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activity = ap.fetch_remote_activity(iri)
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log.info(f"activity={activity!r}")
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# Generates thumbnails for the actor's icon and the attachments if any
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actor = activity.get_actor()
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# Update the cached actor
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DB.actors.update_one(
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{"remote_id": iri},
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{"$set": {"remote_id": iri, "data": actor.to_dict(embed=True)}},
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upsert=True,
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)
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if actor.icon:
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MEDIA_CACHE.cache(actor.icon["url"], Kind.ACTOR_ICON)
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if activity.has_type(ap.ActivityType.CREATE):
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for attachment in activity.get_object()._data.get("attachment", []):
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if attachment.get("mediaType", "").startswith("image/"):
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MEDIA_CACHE.cache(attachment["url"], Kind.ATTACHMENT)
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log.info(f"attachments cached for {iri}")
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except (ActivityGoneError, ActivityNotFoundError):
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log.exception(f"dropping activity {iri}, no attachment caching")
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except Exception as err:
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log.exception(f"failed to cache attachments for {iri}")
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self.retry(exc=err, countdown=int(random.uniform(2, 4) ** self.request.retries))
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@app.task(bind=True, max_retries=12)
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def post_to_inbox(self, payload: str, to: str) -> None:
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try:
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log.info("payload=%s", payload)
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log.info("generating sig")
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signed_payload = json.loads(payload)
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# Don't overwrite the signature if we're forwarding an activity
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if "signature" not in signed_payload:
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generate_signature(signed_payload, KEY)
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log.info("to=%s", to)
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resp = requests.post(
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to,
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data=json.dumps(signed_payload),
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auth=SigAuth,
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headers={
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"Content-Type": HEADERS[1],
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"Accept": HEADERS[1],
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"User-Agent": USER_AGENT,
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},
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)
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log.info("resp=%s", resp)
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log.info("resp_body=%s", resp.text)
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resp.raise_for_status()
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except HTTPError as err:
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log.exception("request failed")
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if 400 >= err.response.status_code >= 499:
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log.info("client error, no retry")
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return
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self.retry(exc=err, countdown=int(random.uniform(2, 4) ** self.request.retries))
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