defmodule Pleroma.Plugs.OAuthPlug do import Plug.Conn import Ecto.Query alias Pleroma.{ User, Repo, Web.OAuth.Token } @realm_reg Regex.compile!("Bearer\:?\s+(.*)$", "i") def init(options), do: options def call(%{assigns: %{user: %User{}}} = conn, _), do: conn def call(conn, _) do with {:ok, token} <- fetch_token(conn), {:ok, user} <- fetch_user(token) do assign(conn, :user, user) else _ -> conn end end # Gets user by token # @spec fetch_user(String.t()) :: {:ok, User.t()} | nil defp fetch_user(token) do query = from(q in Token, where: q.token == ^token, preload: [:user]) with %Token{user: %{info: %{deactivated: false} = _} = user} <- Repo.one(query) do {:ok, user} end end # Gets token from session by :oauth_token key # @spec fetch_token_from_session(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()} defp fetch_token_from_session(conn) do case get_session(conn, :oauth_token) do nil -> :no_token_found token -> {:ok, token} end end # Gets token from headers # @spec fetch_token(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()} defp fetch_token(%Plug.Conn{} = conn) do headers = get_req_header(conn, "authorization") with :no_token_found <- fetch_token(headers), do: fetch_token_from_session(conn) end @spec fetch_token(Keyword.t()) :: :no_token_found | {:ok, String.t()} defp fetch_token([]), do: :no_token_found defp fetch_token([token | tail]) do trimmed_token = String.trim(token) case Regex.run(@realm_reg, trimmed_token) do [_, match] -> {:ok, String.trim(match)} _ -> fetch_token(tail) end end end