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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
62 lines
1.6 KiB
Elixir
62 lines
1.6 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.HTTP.AdapterHelper.Gun do
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@behaviour Pleroma.HTTP.AdapterHelper
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alias Pleroma.Gun.ConnectionPool
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alias Pleroma.HTTP.AdapterHelper
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require Logger
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@defaults [
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connect_timeout: 5_000,
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domain_lookup_timeout: 5_000,
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tls_handshake_timeout: 5_000,
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retry: 1,
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retry_timeout: 1000,
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await_up_timeout: 5_000
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]
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@spec options(keyword(), URI.t()) :: keyword()
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def options(incoming_opts \\ [], %URI{} = uri) do
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proxy =
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Pleroma.Config.get([:http, :proxy_url])
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|> AdapterHelper.format_proxy()
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config_opts = Pleroma.Config.get([:http, :adapter], [])
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@defaults
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|> Keyword.merge(config_opts)
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|> add_scheme_opts(uri)
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|> AdapterHelper.maybe_add_proxy(proxy)
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|> Keyword.merge(incoming_opts)
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end
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@spec after_request(keyword()) :: :ok
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def after_request(opts) do
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if opts[:conn] && opts[:body_as] != :chunks do
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ConnectionPool.release_conn(opts[:conn])
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end
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:ok
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end
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defp add_scheme_opts(opts, %{scheme: "http"}), do: opts
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defp add_scheme_opts(opts, %{scheme: "https"}) do
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opts
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|> Keyword.put(:certificates_verification, true)
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|> Keyword.put(:tls_opts, log_level: :warning)
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end
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@spec get_conn(URI.t(), keyword()) :: {:ok, keyword()} | {:error, atom()}
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def get_conn(uri, opts) do
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case ConnectionPool.get_conn(uri, opts) do
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{:ok, conn_pid} -> {:ok, Keyword.merge(opts, conn: conn_pid, close_conn: false)}
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err -> err
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end
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end
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end
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