Merge branch 'fix/missing_emoji_steal_dir' into 'develop'

Create dir for EmojiStealPolicy automatically

See merge request pleroma/pleroma!3218

CHANGELOG.md

@@ -60,6 +60,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Fix ability to update Pleroma Chat push notifications with PUT /api/v1/push/subscription and alert type pleroma:chat_mention
 - Emoji Reaction activity filtering from blocked and muted accounts.
+- StealEmojiPolicy creates dir for emojis, if it doesn't exist.
 
 ## [2.2.1] - 2020-12-22
 

lib/pleroma/web/activity_pub/mrf/steal_emoji_policy.ex

@@ -10,22 +10,15 @@ defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy do
   @moduledoc "Detect new emojis by their shortcode and steals them"
   @behaviour Pleroma.Web.ActivityPub.MRF
 
-  defp remote_host?(host), do: host != Config.get([Pleroma.Web.Endpoint, :url, :host])
-
   defp accept_host?(host), do: host in Config.get([:mrf_steal_emoji, :hosts], [])
 
-  defp steal_emoji({shortcode, url}) do
+  defp steal_emoji({shortcode, url}, emoji_dir_path) do
     url = Pleroma.Web.MediaProxy.url(url)
-    {:ok, response} = Pleroma.HTTP.get(url)
+
+    with {:ok, %{status: status} = response} when status in 200..299 <- Pleroma.HTTP.get(url) do
       size_limit = Config.get([:mrf_steal_emoji, :size_limit], 50_000)
 
       if byte_size(response.body) <= size_limit do
-      emoji_dir_path =
-        Config.get(
-          [:mrf_steal_emoji, :path],
-          Path.join(Config.get([:instance, :static_dir]), "emoji/stolen")
-        )
-
         extension =
           url
           |> URI.parse()
@@ -33,13 +26,12 @@ defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy do
           |> Path.basename()
           |> Path.extname()
 
-      file_path = Path.join([emoji_dir_path, shortcode <> (extension || ".png")])
-
-      try do
-        :ok = File.write(file_path, response.body)
+        file_path = Path.join(emoji_dir_path, shortcode <> (extension || ".png"))
 
+        case File.write(file_path, response.body) do
+          :ok ->
             shortcode
-      rescue
+
           e ->
             Logger.warn("MRF.StealEmojiPolicy: Failed to write to #{file_path}: #{inspect(e)}")
             nil
@@ -53,30 +45,40 @@ defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy do
 
         nil
       end
-  rescue
+    else
       e ->
         Logger.warn("MRF.StealEmojiPolicy: Failed to fetch #{url}: #{inspect(e)}")
         nil
     end
+  end
 
   @impl true
   def filter(%{"object" => %{"emoji" => foreign_emojis, "actor" => actor}} = message) do
     host = URI.parse(actor).host
 
-    if remote_host?(host) and accept_host?(host) do
+    if host != Pleroma.Web.Endpoint.host() and accept_host?(host) do
       installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
 
+      emoji_dir_path =
+        Config.get(
+          [:mrf_steal_emoji, :path],
+          Path.join(Config.get([:instance, :static_dir]), "emoji/stolen")
+        )
+
+      File.mkdir_p(emoji_dir_path)
+
       new_emojis =
         foreign_emojis
-        |> Enum.filter(fn {shortcode, _url} -> shortcode not in installed_emoji end)
+        |> Enum.reject(fn {shortcode, _url} -> shortcode in installed_emoji end)
         |> Enum.filter(fn {shortcode, _url} ->
           reject_emoji? =
-            Config.get([:mrf_steal_emoji, :rejected_shortcodes], [])
+            [:mrf_steal_emoji, :rejected_shortcodes]
+            |> Config.get([])
             |> Enum.find(false, fn regex -> String.match?(shortcode, regex) end)
 
           !reject_emoji?
         end)
-        |> Enum.map(&steal_emoji(&1))
+        |> Enum.map(&steal_emoji(&1, emoji_dir_path))
         |> Enum.filter(& &1)
 
       if !Enum.empty?(new_emojis) do

test/pleroma/web/activity_pub/mrf/steal_emoji_policy_test.exs

@@ -6,6 +6,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicyTest do
   use Pleroma.DataCase
 
   alias Pleroma.Config
+  alias Pleroma.Emoji
   alias Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy
 
   setup_all do
@@ -14,55 +15,91 @@ defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicyTest do
   end
 
   setup do
-    emoji_path = Path.join(Config.get([:instance, :static_dir]), "emoji/stolen")
-    File.rm_rf!(emoji_path)
-    File.mkdir!(emoji_path)
+    emoji_path = [:instance, :static_dir] |> Config.get() |> Path.join("emoji/stolen")
 
-    Pleroma.Emoji.reload()
+    Emoji.reload()
+
+    message = %{
+      "type" => "Create",
+      "object" => %{
+        "emoji" => [{"firedfox", "https://example.org/emoji/firedfox.png"}],
+        "actor" => "https://example.org/users/admin"
+      }
+    }
 
     on_exit(fn ->
       File.rm_rf!(emoji_path)
     end)
 
-    :ok
+    [message: message, path: emoji_path]
   end
 
-  test "does nothing by default" do
-    installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
-    refute "firedfox" in installed_emoji
+  test "does nothing by default", %{message: message} do
+    refute "firedfox" in installed()
 
-    message = %{
-      "type" => "Create",
-      "object" => %{
-        "emoji" => [{"firedfox", "https://example.org/emoji/firedfox.png"}],
-        "actor" => "https://example.org/users/admin"
-      }
-    }
+    assert {:ok, _message} = StealEmojiPolicy.filter(message)
 
-    assert {:ok, message} == StealEmojiPolicy.filter(message)
-
-    installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
-    refute "firedfox" in installed_emoji
+    refute "firedfox" in installed()
   end
 
-  test "Steals emoji on unknown shortcode from allowed remote host" do
-    installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
-    refute "firedfox" in installed_emoji
+  test "Steals emoji on unknown shortcode from allowed remote host", %{
+    message: message,
+    path: path
+  } do
+    refute "firedfox" in installed()
+    refute File.exists?(path)
 
-    message = %{
-      "type" => "Create",
-      "object" => %{
-        "emoji" => [{"firedfox", "https://example.org/emoji/firedfox.png"}],
-        "actor" => "https://example.org/users/admin"
-      }
-    }
+    clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 284_468)
 
-    clear_config([:mrf_steal_emoji, :hosts], ["example.org"])
-    clear_config([:mrf_steal_emoji, :size_limit], 284_468)
+    assert {:ok, _message} = StealEmojiPolicy.filter(message)
 
-    assert {:ok, message} == StealEmojiPolicy.filter(message)
+    assert "firedfox" in installed()
+    assert File.exists?(path)
 
-    installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
-    assert "firedfox" in installed_emoji
+    assert path
+           |> Path.join("firedfox.png")
+           |> File.exists?()
   end
+
+  test "reject shortcode", %{message: message} do
+    refute "firedfox" in installed()
+
+    clear_config(:mrf_steal_emoji,
+      hosts: ["example.org"],
+      size_limit: 284_468,
+      rejected_shortcodes: [~r/firedfox/]
+    )
+
+    assert {:ok, _message} = StealEmojiPolicy.filter(message)
+
+    refute "firedfox" in installed()
+  end
+
+  test "reject if size is above the limit", %{message: message} do
+    refute "firedfox" in installed()
+
+    clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 50_000)
+
+    assert {:ok, _message} = StealEmojiPolicy.filter(message)
+
+    refute "firedfox" in installed()
+  end
+
+  test "reject if host returns error", %{message: message} do
+    refute "firedfox" in installed()
+
+    Tesla.Mock.mock(fn %{method: :get, url: "https://example.org/emoji/firedfox.png"} ->
+      {:ok, %Tesla.Env{status: 404, body: "Not found"}}
+    end)
+
+    clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 284_468)
+
+    ExUnit.CaptureLog.capture_log(fn ->
+      assert {:ok, _message} = StealEmojiPolicy.filter(message)
+    end) =~ "MRF.StealEmojiPolicy: Failed to fetch https://example.org/emoji/firedfox.png"
+
+    refute "firedfox" in installed()
+  end
+
+  defp installed, do: Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
 end