120 lines
3.3 KiB
Elixir
120 lines
3.3 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Plugs.OAuthPlug do
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import Plug.Conn
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import Ecto.Query
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alias Pleroma.Repo
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alias Pleroma.User
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alias Pleroma.Web.OAuth.App
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alias Pleroma.Web.OAuth.Token
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@realm_reg Regex.compile!("Bearer\:?\s+(.*)$", "i")
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def init(options), do: options
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def call(%{assigns: %{user: %User{}}} = conn, _), do: conn
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def call(%{params: %{"access_token" => access_token}} = conn, _) do
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with {:ok, user, token_record} <- fetch_user_and_token(access_token) do
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conn
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|> assign(:token, token_record)
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|> assign(:user, user)
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else
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_ ->
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# token found, but maybe only with app
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with {:ok, app, token_record} <- fetch_app_and_token(access_token) do
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conn
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|> assign(:token, token_record)
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|> assign(:app, app)
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else
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_ -> conn
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end
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end
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end
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def call(conn, _) do
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case fetch_token_str(conn) do
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{:ok, token} ->
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with {:ok, user, token_record} <- fetch_user_and_token(token) do
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conn
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|> assign(:token, token_record)
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|> assign(:user, user)
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else
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_ ->
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# token found, but maybe only with app
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with {:ok, app, token_record} <- fetch_app_and_token(token) do
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conn
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|> assign(:token, token_record)
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|> assign(:app, app)
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else
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_ -> conn
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end
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end
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_ ->
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conn
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end
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end
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# Gets user by token
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#
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@spec fetch_user_and_token(String.t()) :: {:ok, User.t(), Token.t()} | nil
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defp fetch_user_and_token(token) do
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query =
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from(t in Token,
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where: t.token == ^token,
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join: user in assoc(t, :user),
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preload: [user: user]
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)
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# credo:disable-for-next-line Credo.Check.Readability.MaxLineLength
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with %Token{user: user} = token_record <- Repo.one(query) do
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{:ok, user, token_record}
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end
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end
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@spec fetch_app_and_token(String.t()) :: {:ok, App.t(), Token.t()} | nil
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defp fetch_app_and_token(token) do
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query =
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from(t in Token, where: t.token == ^token, join: app in assoc(t, :app), preload: [app: app])
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with %Token{app: app} = token_record <- Repo.one(query) do
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{:ok, app, token_record}
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end
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end
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# Gets token from session by :oauth_token key
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#
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@spec fetch_token_from_session(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()}
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defp fetch_token_from_session(conn) do
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case get_session(conn, :oauth_token) do
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nil -> :no_token_found
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token -> {:ok, token}
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end
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end
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# Gets token from headers
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#
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@spec fetch_token_str(Plug.Conn.t()) :: :no_token_found | {:ok, String.t()}
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defp fetch_token_str(%Plug.Conn{} = conn) do
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headers = get_req_header(conn, "authorization")
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with :no_token_found <- fetch_token_str(headers),
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do: fetch_token_from_session(conn)
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end
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@spec fetch_token_str(Keyword.t()) :: :no_token_found | {:ok, String.t()}
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defp fetch_token_str([]), do: :no_token_found
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defp fetch_token_str([token | tail]) do
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trimmed_token = String.trim(token)
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case Regex.run(@realm_reg, trimmed_token) do
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[_, match] -> {:ok, String.trim(match)}
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_ -> fetch_token_str(tail)
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end
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end
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end
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