Switch from gen_magic to majic, use Majic.Plug, remove Pleroma.MIME

lib/pleroma/application.ex

@@ -80,7 +80,7 @@ defmodule Pleroma.Application do
         [
           Pleroma.Stats,
           Pleroma.JobQueueMonitor,
-          Pleroma.MIME,
+          {Majic.Pool, [name: Pleroma.MajicPool, pool_size: Config.get([:majic_pool, :size], 2)]},
           {Oban, Config.get(Oban)}
         ] ++
         task_children(@env) ++

lib/pleroma/mime.ex

@@ -1,80 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.MIME do
-  @moduledoc """
-  Returns the mime-type of a binary and optionally a normalized file-name.
-  """
-  @read_bytes 35
-  @pool __MODULE__.GenMagicPool
-
-  def child_spec(_) do
-    pool_size = Pleroma.Config.get!([:gen_magic_pool, :size])
-    name = @pool
-
-    %{
-      id: __MODULE__,
-      start: {GenMagic.Pool, :start_link, [[name: name, pool_size: pool_size]]},
-      type: :worker,
-      restart: :permanent,
-      shutdown: 500
-    }
-  end
-
-  @spec file_mime_type(String.t(), String.t()) ::
-          {:ok, content_type :: String.t(), filename :: String.t()} | {:error, any()} | :error
-  def file_mime_type(path, filename) do
-    with {:ok, content_type} <- file_mime_type(path),
-         filename <- fix_extension(filename, content_type) do
-      {:ok, content_type, filename}
-    end
-  end
-
-  @spec file_mime_type(String.t()) :: {:ok, String.t()} | {:error, any()} | :error
-  def file_mime_type(filename) do
-    case GenMagic.Pool.perform(@pool, filename) do
-      {:ok, %GenMagic.Result{mime_type: content_type}} -> {:ok, content_type}
-      error -> error
-    end
-  end
-
-  def bin_mime_type(binary, filename) do
-    with {:ok, content_type} <- bin_mime_type(binary),
-         filename <- fix_extension(filename, content_type) do
-      {:ok, content_type, filename}
-    end
-  end
-
-  @spec bin_mime_type(binary()) :: {:ok, String.t()} | :error
-  def bin_mime_type(<<head::binary-size(@read_bytes), _::binary>>) do
-    case GenMagic.Pool.perform(@pool, {:bytes, head}) do
-      {:ok, %GenMagic.Result{mime_type: content_type}} -> {:ok, content_type}
-      error -> error
-    end
-  end
-
-  def bin_mime_type(_), do: :error
-
-  defp fix_extension(filename, content_type) do
-    parts = String.split(filename, ".")
-
-    new_filename =
-      if length(parts) > 1 do
-        Enum.drop(parts, -1) |> Enum.join(".")
-      else
-        Enum.join(parts)
-      end
-
-    cond do
-      content_type == "application/octet-stream" ->
-        filename
-
-      ext = List.first(MIME.extensions(content_type)) ->
-        new_filename <> "." <> ext
-
-      true ->
-        Enum.join([new_filename, String.split(content_type, "/") |> List.last()], ".")
-    end
-  end
-end

lib/pleroma/upload.ex

@@ -57,6 +57,7 @@ defmodule Pleroma.Upload do
   defstruct [:id, :name, :tempfile, :content_type, :path]
 
   @spec store(source, options :: [option()]) :: {:ok, Map.t()} | {:error, any()}
+  @doc "Store a file. If using a `Plug.Upload{}` as the source, be sure to use `Majic.Plug` to ensure its content_type and filename is correct."
   def store(upload, opts \\ []) do
     opts = get_opts(opts)
 
@@ -123,14 +124,13 @@ defmodule Pleroma.Upload do
   end
 
   defp prepare_upload(%Plug.Upload{} = file, opts) do
-    with :ok <- check_file_size(file.path, opts.size_limit),
-         {:ok, content_type, name} <- Pleroma.MIME.file_mime_type(file.path, file.filename) do
+    with :ok <- check_file_size(file.path, opts.size_limit) do
       {:ok,
        %__MODULE__{
          id: UUID.generate(),
-         name: name,
+         name: file.filename,
          tempfile: file.path,
-         content_type: content_type
+         content_type: file.content_type
        }}
     end
   end
@@ -138,16 +138,17 @@ defmodule Pleroma.Upload do
   defp prepare_upload(%{img: "data:image/" <> image_data}, opts) do
     parsed = Regex.named_captures(~r/(?<filetype>jpeg|png|gif);base64,(?<data>.*)/, image_data)
     data = Base.decode64!(parsed["data"], ignore: :whitespace)
-    hash = String.downcase(Base.encode16(:crypto.hash(:sha256, data)))
+    hash = Base.encode16(:crypto.hash(:sha256, data), lower: true)
 
     with :ok <- check_binary_size(data, opts.size_limit),
          tmp_path <- tempfile_for_image(data),
-         {:ok, content_type, name} <-
-           Pleroma.MIME.bin_mime_type(data, hash <> "." <> parsed["filetype"]) do
+         {:ok, %{mime_type: content_type}} <-
+           Majic.perform({:bytes, data}, pool: Pleroma.MajicPool),
+         [ext | _] <- MIME.extensions(content_type) do
       {:ok,
        %__MODULE__{
          id: UUID.generate(),
-         name: name,
+         name: hash <> "." <> ext,
          tempfile: tmp_path,
          content_type: content_type
        }}
@@ -156,7 +157,7 @@ defmodule Pleroma.Upload do
 
   # For Mix.Tasks.MigrateLocalUploads
   defp prepare_upload(%__MODULE__{tempfile: path} = upload, _opts) do
-    with {:ok, content_type} <- Pleroma.MIME.file_mime_type(path) do
+    with {:ok, %{mime_type: content_type}} <- Majic.perform(path, pool: Pleroma.MajicPool) do
       {:ok, %__MODULE__{upload | content_type: content_type}}
     end
   end

lib/pleroma/web/activity_pub/activity_pub_controller.ex

@@ -45,6 +45,8 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     when action in [:read_inbox, :update_outbox, :whoami, :upload_media]
   )
 
+  plug(Majic.Plug, [pool: Pleroma.MajicPool] when action in [:upload_media])
+
   plug(
     Pleroma.Plugs.Cache,
     [query_params: false, tracking_fun: &__MODULE__.track_object_fetch/2]

lib/pleroma/web/mastodon_api/controllers/media_controller.ex

@@ -16,6 +16,7 @@ defmodule Pleroma.Web.MastodonAPI.MediaController do
 
   plug(OAuthScopesPlug, %{scopes: ["read:media"]} when action == :show)
   plug(OAuthScopesPlug, %{scopes: ["write:media"]} when action != :show)
+  plug(Majic.Plug, [pool: Pleroma.MajicPool] when action in [:create, :create2])
 
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.MediaOperation
 

lib/pleroma/web/pleroma_api/controllers/account_controller.ex

@@ -56,6 +56,11 @@ defmodule Pleroma.Web.PleromaAPI.AccountController do
   plug(:assign_account_by_id when action in [:favourites, :subscribe, :unsubscribe])
   plug(:put_view, Pleroma.Web.MastodonAPI.AccountView)
 
+  plug(
+    Majic.Plug,
+    [pool: Pleroma.MajicPool] when action in [:update_avatar, :update_background, :update_banner]
+  )
+
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.PleromaAccountOperation
 
   @doc "POST /api/v1/pleroma/accounts/confirmation_resend"

lib/pleroma/web/pleroma_api/controllers/mascot_controller.ex

@@ -12,6 +12,7 @@ defmodule Pleroma.Web.PleromaAPI.MascotController do
   plug(Pleroma.Web.ApiSpec.CastAndValidate)
   plug(OAuthScopesPlug, %{scopes: ["read:accounts"]} when action == :show)
   plug(OAuthScopesPlug, %{scopes: ["write:accounts"]} when action != :show)
+  plug(Majic.Plug, [pool: Pleroma.MajicPool] when action in [:update])
 
   defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.PleromaMascotOperation
 
@@ -22,14 +23,15 @@ defmodule Pleroma.Web.PleromaAPI.MascotController do
 
   @doc "PUT /api/v1/pleroma/mascot"
   def update(%{assigns: %{user: user}, body_params: %{file: file}} = conn, _) do
-    with {:ok, object} <- ActivityPub.upload(file, actor: User.ap_id(user)),
-         # Reject if not an image
-         %{type: "image"} = attachment <- render_attachment(object) do
+    with {:content_type, "image" <> _} <- {:content_type, file.content_type},
+         {:ok, object} <- ActivityPub.upload(file, actor: User.ap_id(user)) do
+      attachment = render_attachment(object)
       {:ok, _user} = User.mascot_update(user, attachment)
 
       json(conn, attachment)
     else
-      %{type: _} -> render_error(conn, :unsupported_media_type, "mascots can only be images")
+      {:content_type, _} ->
+        render_error(conn, :unsupported_media_type, "mascots can only be images")
     end
   end