defmodule Pleroma.Web.Plugs.FrontendStatic do
require Pleroma.Constants
+ @frontend_cookie_name "preferred_frontend"
+
@moduledoc """
This is a shim to call `Plug.Static` but with runtime `from` configuration`. It dispatches to the different frontends.
"""
@behaviour Plug
- @api_routes Pleroma.Web.Router.get_api_routes()
+ defp instance_static_path do
+ Pleroma.Config.get([:instance, :static_dir], "instance/static")
+ end
- def file_path(path, frontend_type \\ :primary) do
- if configuration = Pleroma.Config.get([:frontends, frontend_type]) do
- instance_static_path = Pleroma.Config.get([:instance, :static_dir], "instance/static")
+ def file_path(path, frontend_type \\ :primary)
+ def file_path(path, frontend_type) when is_atom(frontend_type) do
+ if configuration = Pleroma.Config.get([:frontends, frontend_type]) do
Path.join([
- instance_static_path,
+ instance_static_path(),
"frontends",
configuration["name"],
configuration["ref"],
end
end
+ def file_path(path, frontend_type) when is_binary(frontend_type) do
+ Path.join([
+ instance_static_path(),
+ "frontends",
+ frontend_type,
+ path
+ ])
+ end
+
def init(opts) do
opts
|> Keyword.put(:from, "__unconfigured_frontend_static_plug")
|> Plug.Static.init()
|> Map.put(:frontend_type, opts[:frontend_type])
+ |> Map.put(:if, Keyword.get(opts, :if, true))
end
def call(conn, opts) do
with false <- api_route?(conn.path_info),
false <- invalid_path?(conn.path_info),
- frontend_type <- Map.get(opts, :frontend_type, :primary),
+ true <- enabled?(opts[:if]),
+ fallback_frontend_type <- Map.get(opts, :frontend_type, :primary),
+ frontend_type <- preferred_or_fallback(conn, fallback_frontend_type),
path when not is_nil(path) <- file_path("", frontend_type) do
call_static(conn, opts, path)
else
end
end
+ def preferred_frontend(conn) do
+ %{req_cookies: cookies} =
+ conn
+ |> Plug.Conn.fetch_cookies()
+
+ Map.get(cookies, @frontend_cookie_name)
+ end
+
+ # Only override primary frontend
+ def preferred_or_fallback(conn, :primary) do
+ case preferred_frontend(conn) do
+ nil ->
+ :primary
+
+ frontend ->
+ frontend
+ end
+ end
+
+ def preferred_or_fallback(_conn, fallback), do: fallback
+
+ defp enabled?(if_opt) when is_function(if_opt), do: if_opt.()
+ defp enabled?(true), do: true
+ defp enabled?(_), do: false
+
defp invalid_path?(list) do
invalid_path?(list, :binary.compile_pattern(["/", "\\", ":", "\0"]))
end
defp invalid_path?([h | t], match), do: String.contains?(h, match) or invalid_path?(t)
defp invalid_path?([], _match), do: false
- defp api_route?([h | _]) when h in @api_routes, do: true
- defp api_route?([_ | t]), do: api_route?(t)
defp api_route?([]), do: false
+ defp api_route?([h | t]) do
+ api_routes = Pleroma.Web.Router.get_api_routes()
+ if h in api_routes, do: true, else: api_route?(t)
+ end
+
defp call_static(conn, opts, from) do
opts = Map.put(opts, :from, from)
Plug.Static.call(conn, opts)