FloatingGhost
d598c7a834
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73 lines
2.1 KiB
Elixir
73 lines
2.1 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Plugs.FrontendStatic do
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require Pleroma.Constants
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@moduledoc """
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This is a shim to call `Plug.Static` but with runtime `from` configuration`. It dispatches to the different frontends.
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"""
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@behaviour Plug
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def file_path(path, frontend_type \\ :primary) do
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if configuration = Pleroma.Config.get([:frontends, frontend_type]) do
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instance_static_path = Pleroma.Config.get([:instance, :static_dir], "instance/static")
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Path.join([
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instance_static_path,
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"frontends",
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configuration["name"],
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configuration["ref"],
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path
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])
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else
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nil
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end
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end
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def init(opts) do
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opts
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|> Keyword.put(:from, "__unconfigured_frontend_static_plug")
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|> Plug.Static.init()
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|> Map.put(:frontend_type, opts[:frontend_type])
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|> Map.put(:if, Keyword.get(opts, :if, true))
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end
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def call(conn, opts) do
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with false <- api_route?(conn.path_info),
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false <- invalid_path?(conn.path_info),
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true <- enabled?(opts[:if]),
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frontend_type <- Map.get(opts, :frontend_type, :primary),
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path when not is_nil(path) <- file_path("", frontend_type) do
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call_static(conn, opts, path)
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else
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_ ->
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conn
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end
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end
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defp enabled?(if_opt) when is_function(if_opt), do: if_opt.()
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defp enabled?(true), do: true
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defp enabled?(_), do: false
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defp invalid_path?(list) do
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invalid_path?(list, :binary.compile_pattern(["/", "\\", ":", "\0"]))
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end
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defp invalid_path?([h | _], _match) when h in [".", "..", ""], do: true
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defp invalid_path?([h | t], match), do: String.contains?(h, match) or invalid_path?(t)
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defp invalid_path?([], _match), do: false
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defp api_route?([]), do: false
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defp api_route?([h | t]) do
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api_routes = Pleroma.Web.Router.get_api_routes()
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if h in api_routes, do: true, else: api_route?(t)
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end
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defp call_static(conn, opts, from) do
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opts = Map.put(opts, :from, from)
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Plug.Static.call(conn, opts)
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end
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end
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