Initial poll refresh support

[akkoma] / lib / pleroma / object / fetcher.ex

diff --git a/lib/pleroma/object/fetcher.ex b/lib/pleroma/object/fetcher.ex
index 96b34ae9fee8c3f6b9437272f6804642ad716746..da1ebd8b3d3563f6dc1066cd6e5c1d630725be24 100644 (file)
--- a/lib/pleroma/object/fetcher.ex
+++ b/lib/pleroma/object/fetcher.ex
@@ -6,16 +6,20 @@ defmodule Pleroma.Object.Fetcher do
   alias Pleroma.HTTP
   alias Pleroma.Object
   alias Pleroma.Object.Containment
+  alias Pleroma.Signature
+  alias Pleroma.Repo
+  alias Pleroma.Web.ActivityPub.InternalFetchActor
   alias Pleroma.Web.ActivityPub.Transmogrifier
   alias Pleroma.Web.OStatus
 
   require Logger
 
-  defp reinject_object(data) do
+  defp reinject_object(struct, data) do
     Logger.debug("Reinjecting object #{data["id"]}")
 
     with data <- Transmogrifier.fix_object(data),
-         {:ok, object} <- Object.create(data) do
+         changeset <- Object.change(struct, %{data: data}),
+         {:ok, object} <- Repo.insert_or_update(changeset) do
       {:ok, object}
     else
       e ->
@@ -24,6 +28,15 @@ defmodule Pleroma.Object.Fetcher do
     end
   end
 
+  def refetch_object(%Object{data: %{"id" => id}} = object) do
+    with {:ok, data} <- fetch_and_contain_remote_object_from_id(id),
+         {:ok, object} <- reinject_object(object, data) do
+      {:ok, object}
+    else
+      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
@@ -55,7 +68,7 @@ defmodule Pleroma.Object.Fetcher do
           {:reject, nil}
 
         {:object, data, nil} ->
-          reinject_object(data)
+          reinject_object(%Object{}, data)
 
         {:normalize, object = %Object{}} ->
           {:ok, object}
@@ -82,15 +95,50 @@ defmodule Pleroma.Object.Fetcher do
     end
   end
 
-  def fetch_and_contain_remote_object_from_id(id) do
+  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.info("Fetching object #{id} via AP")
 
+    date = Pleroma.Signature.signed_date()
+
+    headers =
+      [{:Accept, "application/activity+json"}]
+      |> maybe_date_fetch(date)
+      |> sign_fetch(id, date)
+
+    Logger.debug("Fetch headers: #{inspect(headers)}")
+
     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, %{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}
@@ -102,4 +150,9 @@ defmodule Pleroma.Object.Fetcher do
         {: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