o_auth_plug.ex (3087B)
- # Pleroma: A lightweight social networking server
- # Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
- # SPDX-License-Identifier: AGPL-3.0-only
- defmodule Pleroma.Web.Plugs.OAuthPlug do
- @moduledoc "Performs OAuth authentication by token from params / headers / cookies."
- import Plug.Conn
- import Ecto.Query
- alias Pleroma.Helpers.AuthHelper
- alias Pleroma.Repo
- alias Pleroma.User
- alias Pleroma.Web.OAuth.App
- alias Pleroma.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_str} <- fetch_token_str(conn) do
- with {:ok, user, user_token} <- fetch_user_and_token(token_str),
- false <- Token.expired?(user_token) do
- conn
- |> assign(:token, user_token)
- |> assign(:user, user)
- else
- _ ->
- with {:ok, app, app_token} <- fetch_app_and_token(token_str),
- false <- Token.expired?(app_token) do
- conn
- |> assign(:token, app_token)
- |> assign(:app, app)
- else
- _ -> conn
- end
- end
- else
- _ -> conn
- end
- end
- # Gets user by token
- #
- @spec fetch_user_and_token(String.t()) :: {:ok, User.t(), Token.t()} | nil
- defp fetch_user_and_token(token) do
- token_query =
- from(t in Token,
- where: t.token == ^token
- )
- with %Token{user_id: user_id} = token_record <- Repo.one(token_query),
- false <- is_nil(user_id),
- %User{} = user <- User.get_cached_by_id(user_id) do
- {:ok, user, token_record}
- else
- _ -> nil
- end
- end
- @spec fetch_app_and_token(String.t()) :: {:ok, App.t(), Token.t()} | nil
- defp fetch_app_and_token(token) do
- query =
- from(t in Token, where: t.token == ^token, join: app in assoc(t, :app), preload: [app: app])
- with %Token{app: app} = token_record <- Repo.one(query) do
- {:ok, app, token_record}
- end
- end
- # Gets token string from conn (in params / headers / session)
- #
- @spec fetch_token_str(Plug.Conn.t() | list(String.t())) :: :no_token_found | {:ok, String.t()}
- defp fetch_token_str(%Plug.Conn{params: %{"access_token" => access_token}} = _conn) do
- {:ok, access_token}
- end
- defp fetch_token_str(%Plug.Conn{} = conn) do
- headers = get_req_header(conn, "authorization")
- with {:ok, token} <- fetch_token_str(headers) do
- {:ok, token}
- else
- _ -> fetch_token_from_session(conn)
- end
- end
- defp fetch_token_str([token | tail]) do
- trimmed_token = String.trim(token)
- case Regex.run(@realm_reg, trimmed_token) do
- [_, match] -> {:ok, String.trim(match)}
- _ -> fetch_token_str(tail)
- end
- end
- defp fetch_token_str([]), do: :no_token_found
- @spec fetch_token_from_session(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()}
- defp fetch_token_from_session(conn) do
- case AuthHelper.get_session_token(conn) do
- nil -> :no_token_found
- token -> {:ok, token}
- end
- end
- end