+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
defmodule Pleroma.Object.Fetcher do
alias Pleroma.HTTP
alias Pleroma.Object
alias Pleroma.Object.Containment
+ alias Pleroma.Repo
+ alias Pleroma.Signature
+ alias Pleroma.Web.ActivityPub.InternalFetchActor
alias Pleroma.Web.ActivityPub.Transmogrifier
- alias Pleroma.Web.OStatus
+ alias Pleroma.Web.Federator
require Logger
+ require Pleroma.Constants
+
+ defp touch_changeset(changeset) do
+ updated_at =
+ NaiveDateTime.utc_now()
+ |> NaiveDateTime.truncate(:second)
+
+ Ecto.Changeset.put_change(changeset, :updated_at, updated_at)
+ end
+
+ defp maybe_reinject_internal_fields(data, %{data: %{} = old_data}) do
+ internal_fields = Map.take(old_data, Pleroma.Constants.object_internal_fields())
+
+ Map.merge(data, internal_fields)
+ end
+
+ defp maybe_reinject_internal_fields(data, _), do: data
- defp reinject_object(data) do
+ @spec reinject_object(struct(), map()) :: {:ok, Object.t()} | {:error, any()}
+ defp reinject_object(struct, data) do
Logger.debug("Reinjecting object #{data["id"]}")
with data <- Transmogrifier.fix_object(data),
- {:ok, object} <- Object.create(data) do
+ data <- maybe_reinject_internal_fields(data, struct),
+ changeset <- Object.change(struct, %{data: data}),
+ changeset <- touch_changeset(changeset),
+ {:ok, object} <- Repo.insert_or_update(changeset),
+ {:ok, object} <- Object.set_cache(object) do
{:ok, object}
else
e ->
end
end
- # TODO:
- # This will create a Create activity, which we need internally at the moment.
- def fetch_object_from_id(id) do
- if object = Object.get_cached_by_ap_id(id) do
+ def refetch_object(%Object{data: %{"id" => id}} = object) do
+ with {:local, false} <- {:local, Object.local?(object)},
+ {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
+ {:ok, object} <- reinject_object(object, data) do
{:ok, object}
else
- Logger.info("Fetching #{id} via AP")
-
- with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
- nil <- Object.normalize(data, false),
- params <- %{
- "type" => "Create",
- "to" => data["to"],
- "cc" => data["cc"],
- "actor" => data["actor"] || data["attributedTo"],
- "object" => data
- },
- :ok <- Containment.contain_origin(id, params),
- {:ok, activity} <- Transmogrifier.handle_incoming(params),
- {:object, _data, %Object{} = object} <-
- {:object, data, Object.normalize(activity, false)} do
- {:ok, object}
- else
- {:error, {:reject, nil}} ->
- {:reject, nil}
+ {: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, 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, false)} do
+ {:ok, object}
+ else
+ {:allowed_depth, false} ->
+ {:error, "Max thread distance exceeded."}
+
+ {:containment, _} ->
+ {:error, "Object containment failed."}
+
+ {:transmogrifier, {:error, {:reject, nil}}} ->
+ {:reject, nil}
+
+ {:transmogrifier, _} ->
+ {:error, "Transmogrifier failure."}
+
+ {:object, data, nil} ->
+ reinject_object(%Object{}, data)
- {:object, data, nil} ->
- reinject_object(data)
+ {:normalize, object = %Object{}} ->
+ {:ok, object}
- object = %Object{} ->
- {:ok, object}
+ {:fetch_object, %Object{} = object} ->
+ {:ok, object}
- _e ->
- Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
+ {:fetch, {:error, error}} ->
+ {:error, error}
- case OStatus.fetch_activity_from_url(id) do
- {:ok, [activity | _]} -> {:ok, Object.normalize(activity, false)}
- e -> e
- end
- end
+ e ->
+ e
end
end
- def fetch_object_from_id!(id) do
- with {:ok, object} <- fetch_object_from_id(id) do
+ defp prepare_activity_params(data) do
+ %{
+ "type" => "Create",
+ "to" => data["to"],
+ "cc" => data["cc"],
+ # Should we seriously keep this attributedTo thing?
+ "actor" => data["actor"] || data["attributedTo"],
+ "object" => data
+ }
+ end
+
+ def fetch_object_from_id!(id, options \\ []) do
+ with {:ok, object} <- fetch_object_from_id(id, options) do
object
else
- _e ->
+ {:error, %Tesla.Mock.Error{}} ->
+ nil
+
+ {:error, "Object has been deleted"} ->
+ nil
+
+ e ->
+ Logger.error("Error while fetching #{id}: #{inspect(e)}")
nil
end
end
- def fetch_and_contain_remote_object_from_id(id) do
- Logger.info("Fetching object #{id} via AP")
+ 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
+ headers ++ make_signature(id, date)
+ else
+ headers
+ end
+ end
+
+ defp maybe_date_fetch(headers, date) do
+ if Pleroma.Config.get([:activitypub, :sign_object_fetches]) do
+ headers ++ [{"date", date}]
+ else
+ headers
+ end
+ end
+
+ def fetch_and_contain_remote_object_from_id(id) when is_binary(id) do
+ Logger.debug("Fetching object #{id} via AP")
+
+ date = Pleroma.Signature.signed_date()
+
+ headers =
+ [{"accept", "application/activity+json"}]
+ |> maybe_date_fetch(date)
+ |> sign_fetch(id, date)
- with true <- String.starts_with?(id, "http"),
- {:ok, %{body: body, status: code}} when code in 200..299 <-
- HTTP.get(
- id,
- [{:Accept, "application/activity+json"}]
- ),
+ Logger.debug("Fetch headers: #{inspect(headers)}")
+
+ with {:scheme, true} <- {:scheme, String.starts_with?(id, "http")},
+ {:ok, %{body: body, status: code}} when code in 200..299 <- HTTP.get(id, headers),
{:ok, data} <- Jason.decode(body),
:ok <- Containment.contain_origin_from_id(id, data) do
{:ok, data}
{:ok, %{status: code}} when code in [404, 410] ->
{:error, "Object has been deleted"}
+ {:scheme, _} ->
+ {:error, "Unsupported URI scheme"}
+
+ {:error, e} ->
+ {:error, e}
+
e ->
{:error, e}
end
end
+
+ 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), do: {:error, "id must be a string"}
end
projects / akkoma / blobdiff