Merge branch 'feat/simplify-pool-managment' into 'develop'
HTTP: radically simplify pool checkin/checkout See merge request pleroma/pleroma!2948
This commit is contained in:
Haelwenn
commit
2b04cdf407
6 changed files with 48 additions and 146 deletions
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@ -19,7 +19,6 @@ defmodule Pleroma.HTTP.AdapterHelper do
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| {Connection.proxy_type(), Connection.host(), pos_integer()}
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@callback options(keyword(), URI.t()) :: keyword()
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@callback get_conn(URI.t(), keyword()) :: {:ok, term()} | {:error, term()}
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@spec format_proxy(String.t() | tuple() | nil) :: proxy() | nil
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def format_proxy(nil), do: nil
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@ -47,9 +46,6 @@ def options(%URI{} = uri, opts \\ []) do
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|> adapter_helper().options(uri)
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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: adapter_helper().get_conn(uri, opts)
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defp adapter, do: Application.get_env(:tesla, :adapter)
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defp adapter_helper do
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@ -6,7 +6,6 @@ defmodule Pleroma.HTTP.AdapterHelper.Gun do
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@behaviour Pleroma.HTTP.AdapterHelper
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alias Pleroma.Config
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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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@ -57,14 +56,6 @@ def pool_timeout(pool) do
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Config.get([:pools, pool, :timeout], default)
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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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@prefix Pleroma.Gun.ConnectionPool
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def limiter_setup do
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wait = Config.get([:connections_pool, :connection_acquisition_wait])
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@ -23,7 +23,4 @@ def options(connection_opts \\ [], %URI{} = uri) do
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end
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defp add_scheme_opts(opts, _), do: opts
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@spec get_conn(URI.t(), keyword()) :: {:ok, keyword()}
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def get_conn(_uri, opts), do: {:ok, opts}
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end
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@ -62,28 +62,21 @@ def request(method, url, body, headers, options) when is_binary(url) do
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uri = URI.parse(url)
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adapter_opts = AdapterHelper.options(uri, options[:adapter] || [])
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case AdapterHelper.get_conn(uri, adapter_opts) do
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{:ok, adapter_opts} ->
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options = put_in(options[:adapter], adapter_opts)
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params = options[:params] || []
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request = build_request(method, headers, options, url, body, params)
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options = put_in(options[:adapter], adapter_opts)
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params = options[:params] || []
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request = build_request(method, headers, options, url, body, params)
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adapter = Application.get_env(:tesla, :adapter)
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adapter = Application.get_env(:tesla, :adapter)
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client = Tesla.client(adapter_middlewares(adapter), adapter)
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client = Tesla.client(adapter_middlewares(adapter), adapter)
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maybe_limit(
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fn ->
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request(client, request)
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end,
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adapter,
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adapter_opts
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)
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# Connection release is handled in a custom FollowRedirects middleware
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err ->
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err
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end
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maybe_limit(
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fn ->
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request(client, request)
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end,
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adapter,
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adapter_opts
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)
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end
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@spec request(Client.t(), keyword()) :: {:ok, Env.t()} | {:error, any()}
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@ -110,7 +103,7 @@ defp maybe_limit(fun, _, _) do
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end
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defp adapter_middlewares(Tesla.Adapter.Gun) do
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[Pleroma.HTTP.Middleware.FollowRedirects]
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[Tesla.Middleware.FollowRedirects, Pleroma.Tesla.Middleware.ConnectionPool]
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end
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defp adapter_middlewares(_), do: []
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35
lib/pleroma/tesla/middleware/connection_pool.ex
Normal file
35
lib/pleroma/tesla/middleware/connection_pool.ex
Normal file
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@ -0,0 +1,35 @@
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# Pleroma: A lightweight social networking server
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# Copyright © 2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Tesla.Middleware.ConnectionPool do
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@moduledoc """
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Middleware to get/release connections from `Pleroma.Gun.ConnectionPool`
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"""
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@behaviour Tesla.Middleware
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alias Pleroma.Gun.ConnectionPool
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@impl Tesla.Middleware
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def call(%Tesla.Env{url: url, opts: opts} = env, next, _) do
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uri = URI.parse(url)
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case ConnectionPool.get_conn(uri, opts[:adapter]) do
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{:ok, conn_pid} ->
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adapter_opts = Keyword.merge(opts[:adapter], conn: conn_pid, close_conn: false)
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opts = Keyword.put(opts, :adapter, adapter_opts)
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env = %{env | opts: opts}
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res = Tesla.run(env, next)
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unless opts[:adapter][:body_as] == :chunks do
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ConnectionPool.release_conn(conn_pid)
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end
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res
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err ->
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err
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end
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end
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end
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@ -1,110 +0,0 @@
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# Pleroma: A lightweight social networking server
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# Copyright © 2015-2020 Tymon Tobolski <https://github.com/teamon/tesla/blob/master/lib/tesla/middleware/follow_redirects.ex>
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# Copyright © 2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.HTTP.Middleware.FollowRedirects do
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@moduledoc """
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Pool-aware version of https://github.com/teamon/tesla/blob/master/lib/tesla/middleware/follow_redirects.ex
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Follow 3xx redirects
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## Options
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- `:max_redirects` - limit number of redirects (default: `5`)
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"""
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alias Pleroma.Gun.ConnectionPool
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@behaviour Tesla.Middleware
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@max_redirects 5
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@redirect_statuses [301, 302, 303, 307, 308]
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@impl Tesla.Middleware
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def call(env, next, opts \\ []) do
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max = Keyword.get(opts, :max_redirects, @max_redirects)
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redirect(env, next, max)
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end
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defp redirect(env, next, left) do
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opts = env.opts[:adapter]
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case Tesla.run(env, next) do
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{:ok, %{status: status} = res} when status in @redirect_statuses and left > 0 ->
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release_conn(opts)
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case Tesla.get_header(res, "location") do
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nil ->
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{:ok, res}
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location ->
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location = parse_location(location, res)
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case get_conn(location, opts) do
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{:ok, opts} ->
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%{env | opts: Keyword.put(env.opts, :adapter, opts)}
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|> new_request(res.status, location)
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|> redirect(next, left - 1)
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e ->
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e
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end
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end
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{:ok, %{status: status}} when status in @redirect_statuses ->
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release_conn(opts)
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{:error, {__MODULE__, :too_many_redirects}}
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{:error, _} = e ->
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release_conn(opts)
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e
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other ->
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unless opts[:body_as] == :chunks do
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release_conn(opts)
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end
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other
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end
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end
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defp get_conn(location, opts) do
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uri = URI.parse(location)
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case ConnectionPool.get_conn(uri, opts) do
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{:ok, conn} ->
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{:ok, Keyword.merge(opts, conn: conn)}
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e ->
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e
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end
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end
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defp release_conn(opts) do
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ConnectionPool.release_conn(opts[:conn])
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end
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# The 303 (See Other) redirect was added in HTTP/1.1 to indicate that the originally
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# requested resource is not available, however a related resource (or another redirect)
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# available via GET is available at the specified location.
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# https://tools.ietf.org/html/rfc7231#section-6.4.4
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defp new_request(env, 303, location), do: %{env | url: location, method: :get, query: []}
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# The 307 (Temporary Redirect) status code indicates that the target
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# resource resides temporarily under a different URI and the user agent
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# MUST NOT change the request method (...)
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# https://tools.ietf.org/html/rfc7231#section-6.4.7
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defp new_request(env, 307, location), do: %{env | url: location}
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defp new_request(env, _, location), do: %{env | url: location, query: []}
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defp parse_location("https://" <> _rest = location, _env), do: location
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defp parse_location("http://" <> _rest = location, _env), do: location
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defp parse_location(location, env) do
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env.url
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|> URI.parse()
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|> URI.merge(location)
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|> URI.to_string()
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end
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end
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