@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)
- 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")
+ 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
+ extension =
+ url
+ |> URI.parse()
+ |> Map.get(:path)
+ |> Path.basename()
+ |> Path.extname()
+
+ file_path = Path.join(emoji_dir_path, shortcode <> (extension || ".png"))
+
+ case File.write(file_path, response.body) do
+ :ok ->
+ shortcode
+
+ e ->
+ Logger.warn("MRF.StealEmojiPolicy: Failed to write to #{file_path}: #{inspect(e)}")
+ nil
+ end
+ else
+ Logger.debug(
+ "MRF.StealEmojiPolicy: :#{shortcode}: at #{url} (#{byte_size(response.body)} B) over size limit (#{
+ size_limit
+ } B)"
)
- extension =
- url
- |> URI.parse()
- |> Map.get(:path)
- |> Path.basename()
- |> Path.extname()
-
- file_path = Path.join([emoji_dir_path, shortcode <> (extension || ".png")])
-
- try do
- :ok = File.write(file_path, response.body)
-
- shortcode
- rescue
- e ->
- Logger.warn("MRF.StealEmojiPolicy: Failed to write to #{file_path}: #{inspect(e)}")
- nil
+ nil
end
else
- Logger.debug(
- "MRF.StealEmojiPolicy: :#{shortcode}: at #{url} (#{byte_size(response.body)} B) over size limit (#{
- size_limit
- } B)"
- )
-
- nil
+ e ->
+ Logger.warn("MRF.StealEmojiPolicy: Failed to fetch #{url}: #{inspect(e)}")
+ nil
end
- rescue
- e ->
- Logger.warn("MRF.StealEmojiPolicy: Failed to fetch #{url}: #{inspect(e)}")
- nil
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
use Pleroma.DataCase
alias Pleroma.Config
+ alias Pleroma.Emoji
alias Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy
setup_all 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()
-
- on_exit(fn ->
- File.rm_rf!(emoji_path)
- end)
-
- :ok
- end
-
- test "does nothing by default" do
- installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
- refute "firedfox" in installed_emoji
+ Emoji.reload()
message = %{
"type" => "Create",
}
}
- assert {:ok, message} == StealEmojiPolicy.filter(message)
+ on_exit(fn ->
+ File.rm_rf!(emoji_path)
+ end)
- installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
- refute "firedfox" in installed_emoji
+ [message: message, path: emoji_path]
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 "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)
+
+ refute "firedfox" in installed()
+ end
- clear_config([:mrf_steal_emoji, :hosts], ["example.org"])
- clear_config([:mrf_steal_emoji, :size_limit], 284_468)
+ test "Steals emoji on unknown shortcode from allowed remote host", %{
+ message: message,
+ path: path
+ } do
+ refute "firedfox" in installed()
+ refute File.exists?(path)
- assert {:ok, message} == StealEmojiPolicy.filter(message)
+ clear_config(:mrf_steal_emoji, hosts: ["example.org"], size_limit: 284_468)
- installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
- assert "firedfox" in installed_emoji
+ assert {:ok, _message} = StealEmojiPolicy.filter(message)
+
+ assert "firedfox" in installed()
+ assert File.exists?(path)
+
+ 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
projects / akkoma / commitdiff