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diff --git a/lib/pleroma/object.ex b/lib/pleroma/object.ex
index fa5baf1a4..f2ba24abf 100644
--- a/lib/pleroma/object.ex
+++ b/lib/pleroma/object.ex
@@ -1,500 +1,503 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Object do
use Ecto.Schema
import Ecto.Query
import Ecto.Changeset
alias Pleroma.Activity
alias Pleroma.Config
alias Pleroma.Hashtag
alias Pleroma.Object
alias Pleroma.Object.Fetcher
alias Pleroma.ObjectTombstone
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Workers.AttachmentsCleanupWorker
require Logger
@type t() :: %__MODULE__{}
@derive {Jason.Encoder, only: [:data]}
@cachex Pleroma.Config.get([:cachex, :provider], Cachex)
schema "objects" do
field(:data, :map)
many_to_many(:hashtags, Hashtag, join_through: "hashtags_objects", on_replace: :delete)
timestamps()
end
def with_joined_activity(query, activity_type \\ "Create", join_type \\ :inner) do
object_position = Map.get(query.aliases, :object, 0)
join(query, join_type, [{object, object_position}], a in Activity,
on:
fragment(
"associated_object_id(?) = (? ->> 'id') AND (?->>'type' = ?) ",
a.data,
object.data,
a.data,
^activity_type
),
as: :object_activity
)
end
def create(data) do
%Object{}
|> Object.change(%{data: data})
|> Repo.insert()
end
def change(struct, params \\ %{}) do
struct
|> cast(params, [:data])
|> validate_required([:data])
|> unique_constraint(:ap_id, name: :objects_unique_apid_index)
# Expecting `maybe_handle_hashtags_change/1` to run last:
|> maybe_handle_hashtags_change(struct)
end
# Note: not checking activity type (assuming non-legacy objects are associated with Create act.)
defp maybe_handle_hashtags_change(changeset, struct) do
with %Ecto.Changeset{valid?: true} <- changeset,
data_hashtags_change = get_change(changeset, :data),
{_, true} <- {:changed, hashtags_changed?(struct, data_hashtags_change)},
{:ok, hashtag_records} <-
data_hashtags_change
|> object_data_hashtags()
|> Hashtag.get_or_create_by_names() do
put_assoc(changeset, :hashtags, hashtag_records)
else
%{valid?: false} ->
changeset
{:changed, false} ->
changeset
{:error, _} ->
validate_change(changeset, :data, fn _, _ ->
[data: "error referencing hashtags"]
end)
end
end
defp hashtags_changed?(%Object{} = struct, %{"tag" => _} = data) do
Enum.sort(embedded_hashtags(struct)) !=
Enum.sort(object_data_hashtags(data))
end
defp hashtags_changed?(_, _), do: false
def get_by_id(nil), do: nil
def get_by_id(id), do: Repo.get(Object, id)
def get_by_id_and_maybe_refetch(id, opts \\ []) do
%{updated_at: updated_at} = object = get_by_id(id)
if opts[:interval] &&
NaiveDateTime.diff(NaiveDateTime.utc_now(), updated_at) > opts[:interval] do
case Fetcher.refetch_object(object) do
{:ok, %Object{} = object} ->
object
e ->
Logger.error("Couldn't refresh #{object.data["id"]}:\n#{inspect(e)}")
object
end
else
object
end
end
def get_by_ap_id(nil), do: nil
def get_by_ap_id(ap_id) do
Repo.one(from(object in Object, where: fragment("(?)->>'id' = ?", object.data, ^ap_id)))
end
@doc """
Get a single attachment by it's name and href
"""
@spec get_attachment_by_name_and_href(String.t(), String.t()) :: Object.t() | nil
def get_attachment_by_name_and_href(name, href) do
query =
from(o in Object,
where: fragment("(?)->>'name' = ?", o.data, ^name),
where: fragment("(?)->>'href' = ?", o.data, ^href)
)
Repo.one(query)
end
defp warn_on_no_object_preloaded(ap_id) do
"Object.normalize() called without preloaded object (#{inspect(ap_id)}). Consider preloading the object"
|> Logger.debug()
Logger.debug("Backtrace: #{inspect(Process.info(:erlang.self(), :current_stacktrace))}")
end
def normalize(_, options \\ [fetch: false, id_only: false])
# If we pass an Activity to Object.normalize(), we can try to use the preloaded object.
# Use this whenever possible, especially when walking graphs in an O(N) loop!
def normalize(%Object{} = object, _), do: object
def normalize(%Activity{object: %Object{} = object}, _), do: object
# A hack for fake activities
def normalize(%Activity{data: %{"object" => %{"fake" => true} = data}}, _) do
%Object{id: "pleroma:fake_object_id", data: data}
end
# No preloaded object
def normalize(%Activity{data: %{"object" => %{"id" => ap_id}}}, options) do
warn_on_no_object_preloaded(ap_id)
normalize(ap_id, options)
end
# No preloaded object
def normalize(%Activity{data: %{"object" => ap_id}}, options) do
warn_on_no_object_preloaded(ap_id)
normalize(ap_id, options)
end
# Old way, try fetching the object through cache.
def normalize(%{"id" => ap_id}, options), do: normalize(ap_id, options)
def normalize(ap_id, options) when is_binary(ap_id) do
cond do
Keyword.get(options, :id_only) ->
ap_id
Keyword.get(options, :fetch) ->
- Fetcher.fetch_object_from_id!(ap_id, options)
+ case Fetcher.fetch_object_from_id(ap_id, options) do
+ {:ok, object} -> object
+ _ -> nil
+ end
true ->
get_cached_by_ap_id(ap_id)
end
end
def normalize(_, _), do: nil
# Owned objects can only be accessed by their owner
def authorize_access(%Object{data: %{"actor" => actor}}, %User{ap_id: ap_id}) do
if actor == ap_id do
:ok
else
{:error, :forbidden}
end
end
# Legacy objects can be accessed by anybody
def authorize_access(%Object{}, %User{}), do: :ok
@spec get_cached_by_ap_id(String.t()) :: Object.t() | nil
def get_cached_by_ap_id(ap_id) do
key = "object:#{ap_id}"
with {:ok, nil} <- @cachex.get(:object_cache, key),
object when not is_nil(object) <- get_by_ap_id(ap_id),
{:ok, true} <- @cachex.put(:object_cache, key, object) do
object
else
{:ok, object} -> object
nil -> nil
end
end
def make_tombstone(%Object{data: %{"id" => id, "type" => type}}, deleted \\ DateTime.utc_now()) do
%ObjectTombstone{
id: id,
formerType: type,
deleted: deleted
}
|> Map.from_struct()
end
def swap_object_with_tombstone(object) do
tombstone = make_tombstone(object)
with {:ok, object} <-
object
|> Object.change(%{data: tombstone})
|> Repo.update() do
Hashtag.unlink(object)
{:ok, object}
end
end
def delete(%Object{data: %{"id" => id}} = object) do
with {:ok, _obj} = swap_object_with_tombstone(object),
deleted_activity = Activity.delete_all_by_object_ap_id(id),
{:ok, _} <- invalid_object_cache(object) do
cleanup_attachments(
Config.get([:instance, :cleanup_attachments]),
%{"object" => object}
)
{:ok, object, deleted_activity}
end
end
@spec cleanup_attachments(boolean(), %{required(:object) => map()}) ::
{:ok, Oban.Job.t() | nil}
def cleanup_attachments(true, %{"object" => _} = params) do
AttachmentsCleanupWorker.enqueue("cleanup_attachments", params)
end
def cleanup_attachments(_, _), do: {:ok, nil}
def prune(%Object{data: %{"id" => _id}} = object) do
with {:ok, object} <- Repo.delete(object),
{:ok, _} <- invalid_object_cache(object) do
{:ok, object}
end
end
def invalid_object_cache(%Object{data: %{"id" => id}}) do
with {:ok, true} <- @cachex.del(:object_cache, "object:#{id}") do
@cachex.del(:web_resp_cache, URI.parse(id).path)
end
end
def set_cache(%Object{data: %{"id" => ap_id}} = object) do
@cachex.put(:object_cache, "object:#{ap_id}", object)
{:ok, object}
end
def update_and_set_cache(changeset) do
with {:ok, object} <- Repo.update(changeset) do
set_cache(object)
end
end
def increase_replies_count(ap_id) do
Object
|> where([o], fragment("?->>'id' = ?::text", o.data, ^to_string(ap_id)))
|> update([o],
set: [
data:
fragment(
"""
safe_jsonb_set(?, '{repliesCount}',
(coalesce((?->>'repliesCount')::int, 0) + 1)::varchar::jsonb, true)
""",
o.data,
o.data
)
]
)
|> Repo.update_all([])
|> case do
{1, [object]} -> set_cache(object)
_ -> {:error, "Not found"}
end
end
defp poll_is_multiple?(%Object{data: %{"anyOf" => [_ | _]}}), do: true
defp poll_is_multiple?(_), do: false
def decrease_replies_count(ap_id) do
Object
|> where([o], fragment("?->>'id' = ?::text", o.data, ^to_string(ap_id)))
|> update([o],
set: [
data:
fragment(
"""
safe_jsonb_set(?, '{repliesCount}',
(greatest(0, (?->>'repliesCount')::int - 1))::varchar::jsonb, true)
""",
o.data,
o.data
)
]
)
|> Repo.update_all([])
|> case do
{1, [object]} -> set_cache(object)
_ -> {:error, "Not found"}
end
end
def increase_quotes_count(ap_id) do
Object
|> where([o], fragment("?->>'id' = ?::text", o.data, ^to_string(ap_id)))
|> update([o],
set: [
data:
fragment(
"""
safe_jsonb_set(?, '{quotesCount}',
(coalesce((?->>'quotesCount')::int, 0) + 1)::varchar::jsonb, true)
""",
o.data,
o.data
)
]
)
|> Repo.update_all([])
|> case do
{1, [object]} -> set_cache(object)
_ -> {:error, "Not found"}
end
end
def decrease_quotes_count(ap_id) do
Object
|> where([o], fragment("?->>'id' = ?::text", o.data, ^to_string(ap_id)))
|> update([o],
set: [
data:
fragment(
"""
safe_jsonb_set(?, '{quotesCount}',
(greatest(0, (?->>'quotesCount')::int - 1))::varchar::jsonb, true)
""",
o.data,
o.data
)
]
)
|> Repo.update_all([])
|> case do
{1, [object]} -> set_cache(object)
_ -> {:error, "Not found"}
end
end
def increase_vote_count(ap_id, name, actor) do
with %Object{} = object <- Object.normalize(ap_id, fetch: false),
"Question" <- object.data["type"] do
key = if poll_is_multiple?(object), do: "anyOf", else: "oneOf"
options =
object.data[key]
|> Enum.map(fn
%{"name" => ^name} = option ->
Kernel.update_in(option["replies"]["totalItems"], &(&1 + 1))
option ->
option
end)
voters = [actor | object.data["voters"] || []] |> Enum.uniq()
data =
object.data
|> Map.put(key, options)
|> Map.put("voters", voters)
object
|> Object.change(%{data: data})
|> update_and_set_cache()
else
_ -> :noop
end
end
@doc "Updates data field of an object"
def update_data(%Object{data: data} = object, attrs \\ %{}) do
object
|> Object.change(%{data: Map.merge(data || %{}, attrs)})
|> Repo.update()
end
def local?(%Object{data: %{"id" => id}}) do
String.starts_with?(id, Pleroma.Web.Endpoint.url() <> "/")
end
def replies(object, opts \\ []) do
object = Object.normalize(object, fetch: false)
query =
Object
|> where(
[o],
fragment("(?)->>'inReplyTo' = ?", o.data, ^object.data["id"])
)
|> order_by([o], asc: o.id)
if opts[:self_only] do
actor = object.data["actor"]
where(query, [o], fragment("(?)->>'actor' = ?", o.data, ^actor))
else
query
end
end
def self_replies(object, opts \\ []),
do: replies(object, Keyword.put(opts, :self_only, true))
def tags(%Object{data: %{"tag" => tags}}) when is_list(tags), do: tags
def tags(_), do: []
def hashtags(%Object{} = object) do
# Note: always using embedded hashtags regardless whether they are migrated to hashtags table
# (embedded hashtags stay in sync anyways, and we avoid extra joins and preload hassle)
embedded_hashtags(object)
end
def embedded_hashtags(%Object{data: data}) do
object_data_hashtags(data)
end
def embedded_hashtags(_), do: []
def object_data_hashtags(%{"tag" => tags}) when is_list(tags) do
tags
|> Enum.filter(fn
%{"type" => "Hashtag"} = data -> Map.has_key?(data, "name")
plain_text when is_bitstring(plain_text) -> true
_ -> false
end)
|> Enum.map(fn
%{"name" => "#" <> hashtag} -> String.downcase(hashtag)
%{"name" => hashtag} -> String.downcase(hashtag)
hashtag when is_bitstring(hashtag) -> String.downcase(hashtag)
end)
|> Enum.uniq()
# Note: "" elements (plain text) might occur in `data.tag` for incoming objects
|> Enum.filter(&(&1 not in [nil, ""]))
end
def object_data_hashtags(_), do: []
def get_emoji_reactions(object) do
reactions = object.data["reactions"]
if is_list(reactions) or is_map(reactions) do
reactions
|> Enum.map(fn
[_emoji, users, _maybe_url] = item when is_list(users) ->
item
[emoji, users] when is_list(users) ->
[emoji, users, nil]
# This case is here to process the Map situation, which will happen
# only with the legacy two-value format.
{emoji, users} when is_list(users) ->
[emoji, users, nil]
_ ->
nil
end)
|> Enum.reject(&is_nil/1)
else
[]
end
end
end
diff --git a/lib/pleroma/object/fetcher.ex b/lib/pleroma/object/fetcher.ex
index cc3772563..508ee7e62 100644
--- a/lib/pleroma/object/fetcher.ex
+++ b/lib/pleroma/object/fetcher.ex
@@ -1,243 +1,227 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Object.Fetcher do
alias Pleroma.HTTP
alias Pleroma.Instances
alias Pleroma.Maps
alias Pleroma.Object
alias Pleroma.Object.Containment
alias Pleroma.Signature
alias Pleroma.Web.ActivityPub.InternalFetchActor
alias Pleroma.Web.ActivityPub.MRF
alias Pleroma.Web.ActivityPub.ObjectValidator
alias Pleroma.Web.ActivityPub.Pipeline
alias Pleroma.Web.ActivityPub.Transmogrifier
alias Pleroma.Web.Federator
require Logger
require Pleroma.Constants
@spec reinject_object(struct(), map()) :: {:ok, Object.t()} | {:error, any()}
defp reinject_object(%Object{data: %{}} = object, new_data) do
Logger.debug("Reinjecting object #{new_data["id"]}")
with {:ok, new_data, _} <- ObjectValidator.validate(new_data, %{}),
{:ok, new_data} <- MRF.filter(new_data),
{:ok, new_object, _} <-
Object.Updater.do_update_and_invalidate_cache(
object,
new_data,
_touch_changeset? = true
) do
{:ok, new_object}
else
e ->
Logger.error("Error while processing object: #{inspect(e)}")
{:error, e}
end
end
defp reinject_object(_, new_data) do
with {:ok, object, _} <- Pipeline.common_pipeline(new_data, local: false) do
{:ok, object}
else
e -> e
end
end
def refetch_object(%Object{data: %{"id" => id}} = object) do
with {:local, false} <- {:local, Object.local?(object)},
{:ok, new_data} <- fetch_and_contain_remote_object_from_id(id),
{:ok, object} <- reinject_object(object, new_data) do
{:ok, object}
else
{:local, true} -> {:ok, object}
e -> {:error, e}
end
end
# Note: will create a Create activity, which we need internally at the moment.
def fetch_object_from_id(id, options \\ []) do
with {_, nil} <- {:fetch_object, Object.get_cached_by_ap_id(id)},
{_, true} <- {:allowed_depth, Federator.allowed_thread_distance?(options[:depth])},
{_, {:ok, data}} <- {:fetch, fetch_and_contain_remote_object_from_id(id)},
{_, nil} <- {:normalize, Object.normalize(data, fetch: false)},
params <- prepare_activity_params(data),
{_, :ok} <- {:containment, Containment.contain_origin(id, params)},
{_, {:ok, activity}} <-
{:transmogrifier, Transmogrifier.handle_incoming(params, options)},
{_, _data, %Object{} = object} <-
{:object, data, Object.normalize(activity, fetch: false)} do
{:ok, object}
else
{:allowed_depth, false} ->
{:error, "Max thread distance exceeded."}
{:containment, _} ->
{:error, "Object containment failed."}
{:transmogrifier, {:error, {:reject, e}}} ->
+ Logger.info("Rejected #{id} while fetching: #{inspect(e)}")
{:reject, e}
{:transmogrifier, {:reject, e}} ->
+ Logger.info("Rejected #{id} while fetching: #{inspect(e)}")
{:reject, e}
{:transmogrifier, _} = e ->
{:error, e}
{:object, data, nil} ->
reinject_object(%Object{}, data)
{:normalize, object = %Object{}} ->
{:ok, object}
{:fetch_object, %Object{} = object} ->
{:ok, object}
{:fetch, {:error, error}} ->
+ Logger.error("Error while fetching #{id}: #{inspect(error)}")
{:error, error}
e ->
- e
+ Logger.error("Error while fetching #{id}: #{inspect(e)}")
+ {:error, e}
end
end
defp prepare_activity_params(data) do
%{
"type" => "Create",
# Should we seriously keep this attributedTo thing?
"actor" => data["actor"] || data["attributedTo"],
"object" => data
}
|> Maps.put_if_present("to", data["to"])
|> Maps.put_if_present("cc", data["cc"])
|> Maps.put_if_present("bto", data["bto"])
|> Maps.put_if_present("bcc", data["bcc"])
end
- def fetch_object_from_id!(id, options \\ []) do
- with {:ok, object} <- fetch_object_from_id(id, options) do
- object
- else
- {:error, %Tesla.Mock.Error{}} ->
- nil
-
- {:error, "Object has been deleted"} ->
- nil
-
- {:reject, reason} ->
- Logger.info("Rejected #{id} while fetching: #{inspect(reason)}")
- nil
-
- e ->
- Logger.error("Error while fetching #{id}: #{inspect(e)}")
- nil
- end
- end
-
defp make_signature(id, date) do
uri = URI.parse(id)
signature =
InternalFetchActor.get_actor()
|> Signature.sign(%{
"(request-target)": "get #{uri.path}",
host: uri.host,
date: date
})
{"signature", signature}
end
defp sign_fetch(headers, id, date) do
if Pleroma.Config.get([:activitypub, :sign_object_fetches]) do
[make_signature(id, date) | headers]
else
headers
end
end
defp maybe_date_fetch(headers, date) do
if Pleroma.Config.get([:activitypub, :sign_object_fetches]) do
[{"date", date} | headers]
else
headers
end
end
def fetch_and_contain_remote_object_from_id(id)
def fetch_and_contain_remote_object_from_id(%{"id" => id}),
do: fetch_and_contain_remote_object_from_id(id)
def fetch_and_contain_remote_object_from_id(id) when is_binary(id) do
Logger.debug("Fetching object #{id} via AP")
with {:scheme, true} <- {:scheme, String.starts_with?(id, "http")},
{:ok, body} <- get_object(id),
{:ok, data} <- safe_json_decode(body),
:ok <- Containment.contain_origin_from_id(id, data) do
if not Instances.reachable?(id) do
Instances.set_reachable(id)
end
{:ok, data}
else
{:scheme, _} ->
{:error, "Unsupported URI scheme"}
{:error, e} ->
{:error, e}
e ->
{:error, e}
end
end
def fetch_and_contain_remote_object_from_id(_id),
do: {:error, "id must be a string"}
defp get_object(id) do
date = Pleroma.Signature.signed_date()
headers =
[{"accept", "application/activity+json"}]
|> maybe_date_fetch(date)
|> sign_fetch(id, date)
case HTTP.get(id, headers) do
{:ok, %{body: body, status: code, headers: headers}} when code in 200..299 ->
case List.keyfind(headers, "content-type", 0) do
{_, content_type} ->
case Plug.Conn.Utils.media_type(content_type) do
{:ok, "application", "activity+json", _} ->
{:ok, body}
{:ok, "application", "ld+json",
%{"profile" => "https://www.w3.org/ns/activitystreams"}} ->
{:ok, body}
_ ->
{:error, {:content_type, content_type}}
end
_ ->
{:error, {:content_type, nil}}
end
{:ok, %{status: code}} when code in [404, 410] ->
{:error, "Object has been deleted"}
{:error, e} ->
{:error, e}
e ->
{:error, e}
end
end
defp safe_json_decode(nil), do: {:ok, nil}
defp safe_json_decode(json), do: Jason.decode(json)
end
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