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58a4f350a8
This patch refactors gun pooling to use Elixir process registry and simplifies adapter option insertion. Having the pool use process registry instead of a GenServer has a number of advantages: - Simpler code: the initial implementation adds about half the lines of code it deletes - Concurrency: unlike a GenServer, ETS-based registry can handle multiple checkout/checkin requests at the same time - Precise and easy idle connection clousure: current proposal for closing idle connections in the GenServer-based pool needs to filter through all connections once a minute and compare their last active time with closing time. With Elixir process registry this can be done by just using `Process.send_after`/`Process.cancel_timer` in the worker process. - Lower memory footprint: In my tests `gun-memory-leak` branch uses about 290mb on peak load (250 connections) and 235mb on idle (5-10 connections). Registry-based pool uses 210mb on idle and 240mb on peak load
139 lines
3.6 KiB
Elixir
139 lines
3.6 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.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(:retry, pool_opts[:retry] || 1)
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|> Map.put_new(:retry_timeout, pool_opts[:retry_timeout] || 1000)
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|> Map.put_new(:await_up_timeout, pool_opts[:await_up_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", host: host}) 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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verify_fun:
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{&:ssl_verify_hostname.verify_fun/3,
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[check_hostname: Pleroma.HTTP.AdapterHelper.format_host(host)]}
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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, _} <- Gun.await_up(conn, opts[:await_up_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}
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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 #{
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inspect(error)
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}"
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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, _} <- Gun.await_up(conn, opts[:await_up_timeout]) do
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{:ok, conn}
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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 #{
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inspect(error)
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}"
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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, _} <- Gun.await_up(conn, opts[:await_up_timeout]) do
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{:ok, conn}
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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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