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36 lines
994 B
Elixir
36 lines
994 B
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Plugs.RateLimitPlug do
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import Phoenix.Controller, only: [json: 2]
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import Plug.Conn
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def init(opts), do: opts
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def call(conn, opts) do
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enabled? = Pleroma.Config.get([:app_account_creation, :enabled])
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case check_rate(conn, Map.put(opts, :enabled, enabled?)) do
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{:ok, _count} -> conn
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{:error, _count} -> render_error(conn)
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%Plug.Conn{} = conn -> conn
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end
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end
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defp check_rate(conn, %{enabled: true} = opts) do
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max_requests = opts[:max_requests]
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bucket_name = conn.remote_ip |> Tuple.to_list() |> Enum.join(".")
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ExRated.check_rate(bucket_name, opts[:interval] * 1000, max_requests)
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end
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defp check_rate(conn, _), do: conn
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defp render_error(conn) do
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conn
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|> put_status(:forbidden)
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|> json(%{error: "Rate limit exceeded."})
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|> halt()
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end
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end
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