155 lines
4 KiB
Elixir
155 lines
4 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.Adapter.Gun do
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@behaviour Pleroma.HTTP.Adapter
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alias Pleroma.HTTP.Adapter
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require Logger
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alias Pleroma.Pool.Connections
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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: 0,
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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(connection_opts \\ [], %URI{} = uri) do
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proxy = Pleroma.Config.get([:http, :proxy_url], nil)
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@defaults
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|> Keyword.merge(Pleroma.Config.get([:http, :adapter], []))
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|> add_original(uri)
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|> add_scheme_opts(uri)
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|> Adapter.maybe_add_proxy(Adapter.format_proxy(proxy))
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|> maybe_get_conn(uri, connection_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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with conn when not is_nil(conn) <- opts[:conn],
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body_as when body_as != :chunks <- opts[:body_as] do
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Connections.checkout(conn, self(), :gun_connections)
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end
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:ok
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end
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defp add_original(opts, %URI{host: host, port: port}) do
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formatted_host = format_host(host)
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Keyword.put(opts, :original, "#{formatted_host}:#{port}")
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end
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defp add_scheme_opts(opts, %URI{scheme: "http"}), do: opts
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defp add_scheme_opts(opts, %URI{scheme: "https", host: host, port: port}) do
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adapter_opts = [
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certificates_verification: true,
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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: {&:ssl_verify_hostname.verify_fun/3, [check_hostname: format_host(host)]},
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log_level: :warning
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]
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]
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adapter_opts =
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if port != 443 do
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Keyword.put(adapter_opts, :transport, :tls)
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else
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adapter_opts
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end
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Keyword.merge(opts, adapter_opts)
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end
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defp maybe_get_conn(adapter_opts, uri, connection_opts) do
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{receive_conn?, opts} =
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adapter_opts
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|> Keyword.merge(connection_opts)
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|> Keyword.pop(:receive_conn, true)
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if Connections.alive?(:gun_connections) and receive_conn? do
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try_to_get_conn(uri, opts)
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else
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opts
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end
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end
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defp try_to_get_conn(uri, opts) do
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try do
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case Connections.checkin(uri, :gun_connections) do
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nil ->
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Logger.debug(
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"Gun connections pool checkin was not successful. Trying to open conn for next request."
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)
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Task.start(fn -> Pleroma.Gun.Conn.open(uri, :gun_connections, opts) end)
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opts
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conn when is_pid(conn) ->
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Logger.debug("received conn #{inspect(conn)} #{Connections.compose_uri_log(uri)}")
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opts
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|> Keyword.put(:conn, conn)
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|> Keyword.put(:close_conn, false)
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end
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rescue
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error ->
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Logger.warn(
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"Gun connections pool checkin caused error #{Connections.compose_uri_log(uri)} #{
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inspect(error)
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}"
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)
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opts
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catch
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# TODO: here must be no timeouts
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:exit, {:timeout, {_, operation, [_, {method, _}, _]}} ->
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{:message_queue_len, messages_len} =
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:gun_connections
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|> Process.whereis()
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|> Process.info(:message_queue_len)
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Logger.warn(
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"Gun connections pool checkin with timeout error for #{operation} #{method} #{
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Connections.compose_uri_log(uri)
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}. Messages length: #{messages_len}"
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)
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opts
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:exit, error ->
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Logger.warn(
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"Gun pool checkin exited with error #{Connections.compose_uri_log(uri)} #{
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inspect(error)
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}"
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)
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opts
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end
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end
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@spec format_host(String.t()) :: charlist()
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def format_host(host) do
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host_charlist = to_charlist(host)
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case :inet.parse_address(host_charlist) do
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{:error, :einval} ->
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:idna.encode(host_charlist)
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{:ok, _ip} ->
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host_charlist
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end
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end
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end
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