51 lines
1.3 KiB
Elixir
51 lines
1.3 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.RemoteIp do
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@moduledoc """
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This is a shim to call [`RemoteIp`](https://git.pleroma.social/pleroma/remote_ip) but with runtime configuration.
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"""
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alias Pleroma.Config
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@behaviour Plug
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def init(_), do: nil
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def call(%{remote_ip: original_remote_ip} = conn, _) do
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if Config.get([__MODULE__, :enabled]) do
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{headers, proxies} = remote_ip_opts()
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new_remote_ip = RemoteIp.from(conn.req_headers, headers: headers, proxies: proxies)
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if new_remote_ip != original_remote_ip do
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Map.put(conn, :remote_ip, new_remote_ip)
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else
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conn
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end
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else
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conn
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end
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end
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defp remote_ip_opts do
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headers = Config.get([__MODULE__, :headers], [])
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reserved = Config.get([__MODULE__, :reserved], [])
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proxies =
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Config.get([__MODULE__, :proxies], [])
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|> Enum.concat(reserved)
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|> Enum.map(&maybe_add_cidr/1)
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{headers, proxies}
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end
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defp maybe_add_cidr(proxy) when is_binary(proxy) do
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cond do
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"/" in String.codepoints(proxy) -> proxy
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InetCidr.v4?(InetCidr.parse_address!(proxy)) -> proxy <> "/32"
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InetCidr.v6?(InetCidr.parse_address!(proxy)) -> proxy <> "/128"
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end
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end
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end
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