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defmodule Pleroma.Object.Fetcher do
alias Pleroma.HTTP
alias Pleroma.Object
alias Pleroma.Object.Containment
alias Pleroma.Web.ActivityPub.Transmogrifier
alias Pleroma.Web.OStatus
require Logger
defp reinject_object(data) do
Logger.debug("Reinjecting object #{data["id"]}")
with data <- Transmogrifier.fix_object(data),
{:ok, object} <- Object.create(data) do
{:ok, object}
else
e ->
Logger.error("Error while processing object: #{inspect(e)}")
{:error, e}
end
end
# TODO:
# This 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
{: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."}
{:error, {:reject, nil}} ->
{:reject, nil}
{:object, data, nil} ->
reinject_object(data)
{: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...")
# FIXME: OStatus Object Containment?
case OStatus.fetch_activity_from_url(id) do
{:ok, [activity | _]} -> {:ok, Object.normalize(activity, false)}
e -> e
end
end
end
end
def fetch_object_from_id!(id, options \\ []) do
with {:ok, object} <- fetch_object_from_id(id, options) do
object
else
_e ->
nil
end
end
def fetch_and_contain_remote_object_from_id(id) do
Logger.info("Fetching object #{id} via AP")
with true <- String.starts_with?(id, "http"),
{:ok, %{body: body, status: code}} when code in 200..299 <-
HTTP.get(
id,
[{:Accept, "application/activity+json"}]
),
{: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"}
e ->
{:error, e}
end
end
end
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