131 lines
3.5 KiB
Elixir
131 lines
3.5 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Gun.Conn do
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alias Pleroma.Gun
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require Logger
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def open(%URI{} = uri, opts) do
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pool_opts = Pleroma.Config.get([:connections_pool], [])
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opts =
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opts
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|> Enum.into(%{})
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|> Map.put_new(:connect_timeout, pool_opts[:connect_timeout] || 5_000)
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|> Map.put_new(:supervise, false)
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|> maybe_add_tls_opts(uri)
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do_open(uri, opts)
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end
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defp maybe_add_tls_opts(opts, %URI{scheme: "http"}), do: opts
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defp maybe_add_tls_opts(opts, %URI{scheme: "https"}) do
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tls_opts = [
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verify: :verify_peer,
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cacertfile: CAStore.file_path(),
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depth: 20,
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reuse_sessions: false,
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log_level: :warning,
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customize_hostname_check: [match_fun: :public_key.pkix_verify_hostname_match_fun(:https)]
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]
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tls_opts =
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if Keyword.keyword?(opts[:tls_opts]) do
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Keyword.merge(tls_opts, opts[:tls_opts])
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else
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tls_opts
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end
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Map.put(opts, :tls_opts, tls_opts)
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end
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defp do_open(uri, %{proxy: {proxy_host, proxy_port}} = opts) do
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connect_opts =
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uri
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|> destination_opts()
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|> add_http2_opts(uri.scheme, Map.get(opts, :tls_opts, []))
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with open_opts <- Map.delete(opts, :tls_opts),
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{:ok, conn} <- Gun.open(proxy_host, proxy_port, open_opts),
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{:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]),
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stream <- Gun.connect(conn, connect_opts),
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{:response, :fin, 200, _} <- Gun.await(conn, stream) do
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{:ok, conn, protocol}
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else
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error ->
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Logger.warn(
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"Opening proxied connection to #{compose_uri_log(uri)} failed with error #{inspect(error)}"
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)
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error
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end
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end
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defp do_open(uri, %{proxy: {proxy_type, proxy_host, proxy_port}} = opts) do
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version =
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proxy_type
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|> to_string()
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|> String.last()
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|> case do
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"4" -> 4
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_ -> 5
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end
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socks_opts =
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uri
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|> destination_opts()
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|> add_http2_opts(uri.scheme, Map.get(opts, :tls_opts, []))
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|> Map.put(:version, version)
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opts =
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opts
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|> Map.put(:protocols, [:socks])
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|> Map.put(:socks_opts, socks_opts)
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with {:ok, conn} <- Gun.open(proxy_host, proxy_port, opts),
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{:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]) do
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{:ok, conn, protocol}
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else
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error ->
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Logger.warn(
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"Opening socks proxied connection to #{compose_uri_log(uri)} failed with error #{inspect(error)}"
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)
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error
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end
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end
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defp do_open(%URI{host: host, port: port} = uri, opts) do
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host = Pleroma.HTTP.AdapterHelper.parse_host(host)
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with {:ok, conn} <- Gun.open(host, port, opts),
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{:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]) do
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{:ok, conn, protocol}
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else
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error ->
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Logger.warn(
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"Opening connection to #{compose_uri_log(uri)} failed with error #{inspect(error)}"
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)
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error
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end
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end
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defp destination_opts(%URI{host: host, port: port}) do
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host = Pleroma.HTTP.AdapterHelper.parse_host(host)
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%{host: host, port: port}
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end
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defp add_http2_opts(opts, "https", tls_opts) do
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Map.merge(opts, %{protocols: [:http2], transport: :tls, tls_opts: tls_opts})
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end
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defp add_http2_opts(opts, _, _), do: opts
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def compose_uri_log(%URI{scheme: scheme, host: host, path: path}) do
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"#{scheme}://#{host}#{path}"
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end
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end
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