[#1505] Restricted max thread distance for fetching replies on incoming federation...

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

diff --git a/lib/pleroma/object/fetcher.ex b/lib/pleroma/object/fetcher.ex
index 5e064fd8735a9ea9dbb48f0e13d872204db1b2b4..23ecd9e15ef61a23fe187c7dd67ca65db7e6a7d2 100644 (file)
--- a/lib/pleroma/object/fetcher.ex
+++ b/lib/pleroma/object/fetcher.ex
@@ -10,7 +10,7 @@ defmodule Pleroma.Object.Fetcher do
   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
@@ -39,7 +39,8 @@ defmodule Pleroma.Object.Fetcher 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) do
+         {:ok, object} <- Repo.insert_or_update(changeset),
+         {:ok, object} <- Object.set_cache(object) do
       {:ok, object}
     else
       e ->
@@ -49,35 +50,42 @@ defmodule Pleroma.Object.Fetcher do
   end
 
   def refetch_object(%Object{data: %{"id" => id}} = object) do
-    with {:local, false} <- {:local, String.starts_with?(id, Pleroma.Web.base_url() <> "/")},
+    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
-      {: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
-    with {:fetch_object, nil} <- {:fetch_object, Object.get_cached_by_ap_id(id)},
-         {:fetch, {:ok, data}} <- {:fetch, fetch_and_contain_remote_object_from_id(id)},
-         {:normalize, nil} <- {:normalize, Object.normalize(data, false)},
+    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),
-         {:containment, :ok} <- {:containment, Containment.contain_origin(id, params)},
-         {:ok, activity} <- Transmogrifier.handle_incoming(params, options),
-         {:object, _data, %Object{} = object} <-
+         {_, :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."}
 
-      {:error, {:reject, nil}} ->
+      {:transmogrifier, {:error, {:reject, nil}}} ->
         {:reject, nil}
 
+      {:transmogrifier, _} ->
+        {:error, "Transmogrifier failure."}
+
       {:object, data, nil} ->
         reinject_object(%Object{}, data)
 
@@ -87,15 +95,11 @@ defmodule Pleroma.Object.Fetcher do
       {:fetch_object, %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, {:error, error}} ->
+        {:error, error}
 
-        # FIXME: OStatus Object Containment?
-        case OStatus.fetch_activity_from_url(id) do
-          {:ok, [activity | _]} -> {:ok, Object.normalize(activity, false)}
-          e -> e
-        end
+      e ->
+        e
     end
   end
 
@@ -114,7 +118,14 @@ defmodule Pleroma.Object.Fetcher 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
@@ -150,7 +161,7 @@ defmodule Pleroma.Object.Fetcher do
   end
 
   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")
 
     date = Pleroma.Signature.signed_date()
 
@@ -161,7 +172,7 @@ defmodule Pleroma.Object.Fetcher do
 
     Logger.debug("Fetch headers: #{inspect(headers)}")
 
-    with true <- String.starts_with?(id, "http"),
+    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
@@ -170,6 +181,12 @@ defmodule Pleroma.Object.Fetcher do
       {: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