3 files changed, 46 insertions, 24 deletions
diff --git a/lib/pleroma/plugs/set_format_plug.ex b/lib/pleroma/plugs/set_format_plug.ex
new file mode 100644
index 000000000..5ca741c64
--- /dev/null
+++ b/lib/pleroma/plugs/set_format_plug.ex
@@ -0,0 +1,24 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Plugs.SetFormatPlug do
+  import Plug.Conn, only: [assign: 3, fetch_query_params: 1]
+
+  def init(_), do: nil
+
+  def call(conn, _) do
+    case get_format(conn) do
+      nil -> conn
+      format -> assign(conn, :format, format)
+    end
+  end
+
+  defp get_format(conn) do
+    conn.private[:phoenix_format] ||
+      case fetch_query_params(conn) do
+        %{query_params: %{"_format" => format}} -> format
+        _ -> nil
+      end
+  end
+end
diff --git a/lib/pleroma/web/web_finger/web_finger.ex b/lib/pleroma/web/web_finger/web_finger.ex
index fa34c7ced..0514ade2b 100644
--- a/lib/pleroma/web/web_finger/web_finger.ex
+++ b/lib/pleroma/web/web_finger/web_finger.ex
@@ -187,6 +187,7 @@ defmodule Pleroma.Web.WebFinger do
     end
   end
 
+  @spec finger(String.t()) :: {:ok, map()} | {:error, any()}
   def finger(account) do
     account = String.trim_leading(account, "@")
 
@@ -220,8 +221,6 @@ defmodule Pleroma.Web.WebFinger do
       else
         with {:ok, doc} <- Jason.decode(body) do
           webfinger_from_json(doc)
-        else
-          {:error, e} -> e
         end
       end
     else
diff --git a/lib/pleroma/web/web_finger/web_finger_controller.ex b/lib/pleroma/web/web_finger/web_finger_controller.ex
index b77c75ec5..896eb15f9 100644
--- a/lib/pleroma/web/web_finger/web_finger_controller.ex
+++ b/lib/pleroma/web/web_finger/web_finger_controller.ex
@@ -7,6 +7,7 @@ defmodule Pleroma.Web.WebFinger.WebFingerController do
 
   alias Pleroma.Web.WebFinger
 
+  plug(Pleroma.Plugs.SetFormatPlug)
   plug(Pleroma.Web.FederatingPlug)
 
   def host_meta(conn, _params) do
@@ -17,30 +18,28 @@ defmodule Pleroma.Web.WebFinger.WebFingerController do
     |> send_resp(200, xml)
   end
 
-  def webfinger(conn, %{"resource" => resource}) do
-    case get_format(conn) do
-      n when n in ["xml", "xrd+xml"] ->
-        with {:ok, response} <- WebFinger.webfinger(resource, "XML") do
-          conn
-          |> put_resp_content_type("application/xrd+xml")
-          |> send_resp(200, response)
-        else
-          _e -> send_resp(conn, 404, "Couldn't find user")
-        end
-
-      n when n in ["json", "jrd+json"] ->
-        with {:ok, response} <- WebFinger.webfinger(resource, "JSON") do
-          json(conn, response)
-        else
-          _e -> send_resp(conn, 404, "Couldn't find user")
-        end
-
-      _ ->
-        send_resp(conn, 404, "Unsupported format")
+  def webfinger(%{assigns: %{format: format}} = conn, %{"resource" => resource})
+      when format in ["xml", "xrd+xml"] do
+    with {:ok, response} <- WebFinger.webfinger(resource, "XML") do
+      conn
+      |> put_resp_content_type("application/xrd+xml")
+      |> send_resp(200, response)
+    else
+      _e -> send_resp(conn, 404, "Couldn't find user")
     end
   end
 
-  def webfinger(conn, _params) do
-    send_resp(conn, 400, "Bad Request")
+  def webfinger(%{assigns: %{format: format}} = conn, %{"resource" => resource})
+      when format in ["json", "jrd+json"] do
+    with {:ok, response} <- WebFinger.webfinger(resource, "JSON") do
+      json(conn, response)
+    else
+      _e ->
+        conn
+        |> put_status(404)
+        |> json("Couldn't find user")
+    end
   end
+
+  def webfinger(conn, _params), do: send_resp(conn, 400, "Bad Request")
 end