# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Object.Fetcher do
alias Pleroma.Repo
alias Pleroma.Signature
alias Pleroma.Web.ActivityPub.InternalFetchActor
+ alias Pleroma.Web.ActivityPub.ObjectValidator
alias Pleroma.Web.ActivityPub.Transmogrifier
- alias Pleroma.Web.OStatus
+ alias Pleroma.Web.Federator
require Logger
require Pleroma.Constants
Ecto.Changeset.put_change(changeset, :updated_at, updated_at)
end
- defp maybe_reinject_internal_fields(data, %{data: %{} = old_data}) do
+ defp maybe_reinject_internal_fields(%{data: %{} = old_data}, new_data) do
internal_fields = Map.take(old_data, Pleroma.Constants.object_internal_fields())
- Map.merge(data, internal_fields)
+ Map.merge(new_data, internal_fields)
end
- defp maybe_reinject_internal_fields(data, _), do: data
+ defp maybe_reinject_internal_fields(_, new_data), do: new_data
- defp reinject_object(struct, data) do
- Logger.debug("Reinjecting object #{data["id"]}")
+ @spec reinject_object(struct(), map()) :: {:ok, Object.t()} | {:error, any()}
+ defp reinject_object(%Object{data: %{"type" => "Question"}} = object, new_data) do
+ Logger.debug("Reinjecting object #{new_data["id"]}")
- with data <- Transmogrifier.fix_object(data),
- data <- maybe_reinject_internal_fields(data, struct),
- changeset <- Object.change(struct, %{data: data}),
+ with data <- maybe_reinject_internal_fields(object, new_data),
+ {:ok, data, _} <- ObjectValidator.validate(data, %{}),
+ changeset <- Object.change(object, %{data: data}),
+ changeset <- touch_changeset(changeset),
+ {:ok, object} <- Repo.insert_or_update(changeset),
+ {:ok, object} <- Object.set_cache(object) do
+ {:ok, object}
+ else
+ e ->
+ Logger.error("Error while processing object: #{inspect(e)}")
+ {:error, e}
+ end
+ end
+
+ defp reinject_object(%Object{} = object, new_data) do
+ Logger.debug("Reinjecting object #{new_data["id"]}")
+
+ with new_data <- Transmogrifier.fix_object(new_data),
+ data <- maybe_reinject_internal_fields(object, new_data),
+ changeset <- Object.change(object, %{data: data}),
changeset <- touch_changeset(changeset),
{:ok, object} <- Repo.insert_or_update(changeset),
{:ok, object} <- Object.set_cache(object) do
end
def refetch_object(%Object{data: %{"id" => id}} = object) do
- with {:local, false} <- {:local, String.starts_with?(id, Pleroma.Web.base_url() <> "/")},
- {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
- {:ok, object} <- reinject_object(object, data) 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} -> object
+ {:local, true} -> {:ok, object}
e -> {:error, e}
end
end
- # TODO:
- # This will create a Create activity, which we need internally at the moment.
+ # Note: will create a Create activity, which we need internally at the moment.
def fetch_object_from_id(id, options \\ []) do
- if object = Object.get_cached_by_ap_id(id) 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
- Logger.info("Fetching #{id} via AP")
-
- with {:fetch, {:ok, data}} <- {:fetch, fetch_and_contain_remote_object_from_id(id)},
- {:normalize, nil} <- {:normalize, Object.normalize(data, false)},
- params <- %{
- "type" => "Create",
- "to" => data["to"],
- "cc" => data["cc"],
- # Should we seriously keep this attributedTo thing?
- "actor" => data["actor"] || data["attributedTo"],
- "object" => data
- },
- {:containment, :ok} <- {:containment, Containment.contain_origin(id, params)},
- {:ok, activity} <- Transmogrifier.handle_incoming(params, options),
- {:object, _data, %Object{} = object} <-
- {:object, data, Object.normalize(activity, false)} do
- {:ok, object}
- else
- {:containment, _} ->
- {:error, "Object containment failed."}
+ {:allowed_depth, false} ->
+ {:error, "Max thread distance exceeded."}
+
+ {:containment, _} ->
+ {:error, "Object containment failed."}
- {:error, {:reject, nil}} ->
- {:reject, nil}
+ {:transmogrifier, {:error, {:reject, e}}} ->
+ {:reject, e}
- {:object, data, nil} ->
- reinject_object(%Object{}, data)
+ {:transmogrifier, _} = e ->
+ {:error, e}
+
+ {:object, data, nil} ->
+ reinject_object(%Object{}, data)
- {:normalize, object = %Object{}} ->
- {:ok, object}
+ {:normalize, object = %Object{}} ->
+ {:ok, object}
- _e ->
- # Only fallback when receiving a fetch/normalization error with ActivityPub
- Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
+ {:fetch_object, %Object{} = object} ->
+ {:ok, object}
- # FIXME: OStatus Object Containment?
- case OStatus.fetch_activity_from_url(id) do
- {:ok, [activity | _]} -> {:ok, Object.normalize(activity, false)}
- e -> e
- end
- end
+ {:fetch, {:error, error}} ->
+ {:error, error}
+
+ e ->
+ e
end
end
+ 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
+
+ {:reject, reason} ->
+ Logger.info("Rejected #{id} while fetching: #{inspect(reason)}")
+ nil
+
+ e ->
+ Logger.error("Error while fetching #{id}: #{inspect(e)}")
nil
end
end
date: date
})
- [{:Signature, signature}]
+ {"signature", signature}
end
defp sign_fetch(headers, id, date) do
if Pleroma.Config.get([:activitypub, :sign_object_fetches]) do
- headers ++ make_signature(id, date)
+ [make_signature(id, date) | headers]
else
headers
end
defp maybe_date_fetch(headers, date) do
if Pleroma.Config.get([:activitypub, :sign_object_fetches]) do
- headers ++ [{:Date, date}]
+ [{"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.info("Fetching object #{id} via AP")
+ 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
+ {: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"}]
+ [{"accept", "application/activity+json"}]
|> maybe_date_fetch(date)
|> sign_fetch(id, date)
- Logger.debug("Fetch headers: #{inspect(headers)}")
+ 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
- with true <- 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}
- else
{:ok, %{status: code}} when code in [404, 410] ->
{:error, "Object has been deleted"}
+ {: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"}
+ defp safe_json_decode(nil), do: {:ok, nil}
+ defp safe_json_decode(json), do: Jason.decode(json)
end
projects / akkoma / blobdiff