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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Application do
   6   use Application
   7
   8   import Cachex.Spec
   9
  10   alias Pleroma.Config
  11
  12   require Logger
  13
  14   @name Mix.Project.config()[:name]
  15   @version Mix.Project.config()[:version]
  16   @repository Mix.Project.config()[:source_url]
  17   @mix_env Mix.env()
  18
  19   def name, do: @name
  20   def version, do: @version
  21   def named_version, do: @name <> " " <> @version
  22   def repository, do: @repository
  23
  24   def user_agent do
  25     if Process.whereis(Pleroma.Web.Endpoint) do
  26       case Config.get([:http, :user_agent], :default) do
  27         :default ->
  28           info = "#{Pleroma.Web.Endpoint.url()} <#{Config.get([:instance, :email], "")}>"
  29           named_version() <> "; " <> info
  30
  31         custom ->
  32           custom
  33       end
  34     else
  35       # fallback, if endpoint is not started yet
  36       "Pleroma Data Loader"
  37     end
  38   end
  39
  40   # See http://elixir-lang.org/docs/stable/elixir/Application.html
  41   # for more information on OTP Applications
  42   def start(_type, _args) do
  43     # Scrubbers are compiled at runtime and therefore will cause a conflict
  44     # every time the application is restarted, so we disable module
  45     # conflicts at runtime
  46     Code.compiler_options(ignore_module_conflict: true)
  47     # Disable warnings_as_errors at runtime, it breaks Phoenix live reload
  48     # due to protocol consolidation warnings
  49     Code.compiler_options(warnings_as_errors: false)
  50     Pleroma.Telemetry.Logger.attach()
  51     Config.Holder.save_default()
  52     Pleroma.HTML.compile_scrubbers()
  53     Pleroma.Config.Oban.warn()
  54     Config.DeprecationWarnings.warn()
  55     Pleroma.Web.Plugs.HTTPSecurityPlug.warn_if_disabled()
  56     Pleroma.ApplicationRequirements.verify!()
  57     setup_instrumenters()
  58     load_custom_modules()
  59     Pleroma.Docs.JSON.compile()
  60     limiters_setup()
  61
  62     adapter = Application.get_env(:tesla, :adapter)
  63
  64     if adapter == Tesla.Adapter.Gun do
  65       if version = Pleroma.OTPVersion.version() do
  66         [major, minor] =
  67           version
  68           |> String.split(".")
  69           |> Enum.map(&String.to_integer/1)
  70           |> Enum.take(2)
  71
  72         if (major == 22 and minor < 2) or major < 22 do
  73           raise "
  74             !!!OTP VERSION WARNING!!!
  75             You are using gun adapter with OTP version #{version}, which doesn't support correct handling of unordered certificates chains. Please update your Erlang/OTP to at least 22.2.
  76             "
  77         end
  78       else
  79         raise "
  80           !!!OTP VERSION WARNING!!!
  81           To support correct handling of unordered certificates chains - OTP version must be > 22.2.
  82           "
  83       end
  84     end
  85
  86     # Define workers and child supervisors to be supervised
  87     children =
  88       [
  89         Pleroma.Repo,
  90         Config.TransferTask,
  91         Pleroma.Emoji,
  92         Pleroma.Web.Plugs.RateLimiter.Supervisor
  93       ] ++
  94         cachex_children() ++
  95         http_children(adapter, @mix_env) ++
  96         [
  97           Pleroma.Stats,
  98           Pleroma.JobQueueMonitor,
  99           {Majic.Pool, [name: Pleroma.MajicPool, pool_size: Config.get([:majic_pool, :size], 2)]},
 100           {Oban, Config.get(Oban)},
 101           Pleroma.Web.Endpoint
 102         ] ++
 103         task_children(@mix_env) ++
 104         dont_run_in_test(@mix_env) ++
 105         chat_child(chat_enabled?()) ++
 106         [Pleroma.Gopher.Server]
 107
 108     # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
 109     # for other strategies and supported options
 110     opts = [strategy: :one_for_one, name: Pleroma.Supervisor]
 111     result = Supervisor.start_link(children, opts)
 112
 113     set_postgres_server_version()
 114
 115     result
 116   end
 117
 118   defp set_postgres_server_version do
 119     version =
 120       with %{rows: [[version]]} <- Ecto.Adapters.SQL.query!(Pleroma.Repo, "show server_version"),
 121            {num, _} <- Float.parse(version) do
 122         num
 123       else
 124         e ->
 125           Logger.warn(
 126             "Could not get the postgres version: #{inspect(e)}.\nSetting the default value of 9.6"
 127           )
 128
 129           9.6
 130       end
 131
 132     :persistent_term.put({Pleroma.Repo, :postgres_version}, version)
 133   end
 134
 135   def load_custom_modules do
 136     dir = Config.get([:modules, :runtime_dir])
 137
 138     if dir && File.exists?(dir) do
 139       dir
 140       |> Pleroma.Utils.compile_dir()
 141       |> case do
 142         {:error, _errors, _warnings} ->
 143           raise "Invalid custom modules"
 144
 145         {:ok, modules, _warnings} ->
 146           if @mix_env != :test do
 147             Enum.each(modules, fn mod ->
 148               Logger.info("Custom module loaded: #{inspect(mod)}")
 149             end)
 150           end
 151
 152           :ok
 153       end
 154     end
 155   end
 156
 157   defp setup_instrumenters do
 158     require Prometheus.Registry
 159
 160     if Application.get_env(:prometheus, Pleroma.Repo.Instrumenter) do
 161       :ok =
 162         :telemetry.attach(
 163           "prometheus-ecto",
 164           [:pleroma, :repo, :query],
 165           &Pleroma.Repo.Instrumenter.handle_event/4,
 166           %{}
 167         )
 168
 169       Pleroma.Repo.Instrumenter.setup()
 170     end
 171
 172     Pleroma.Web.Endpoint.MetricsExporter.setup()
 173     Pleroma.Web.Endpoint.PipelineInstrumenter.setup()
 174
 175     # Note: disabled until prometheus-phx is integrated into prometheus-phoenix:
 176     # Pleroma.Web.Endpoint.Instrumenter.setup()
 177     PrometheusPhx.setup()
 178   end
 179
 180   defp cachex_children do
 181     [
 182       build_cachex("used_captcha", ttl_interval: seconds_valid_interval()),
 183       build_cachex("user", default_ttl: 25_000, ttl_interval: 1000, limit: 2500),
 184       build_cachex("object", default_ttl: 25_000, ttl_interval: 1000, limit: 2500),
 185       build_cachex("rich_media", default_ttl: :timer.minutes(120), limit: 5000),
 186       build_cachex("scrubber", limit: 2500),
 187       build_cachex("idempotency", expiration: idempotency_expiration(), limit: 2500),
 188       build_cachex("web_resp", limit: 2500),
 189       build_cachex("emoji_packs", expiration: emoji_packs_expiration(), limit: 10),
 190       build_cachex("failed_proxy_url", limit: 2500),
 191       build_cachex("banned_urls", default_ttl: :timer.hours(24 * 30), limit: 5_000),
 192       build_cachex("chat_message_id_idempotency_key",
 193         expiration: chat_message_id_idempotency_key_expiration(),
 194         limit: 500_000
 195       )
 196     ]
 197   end
 198
 199   defp emoji_packs_expiration,
 200     do: expiration(default: :timer.seconds(5 * 60), interval: :timer.seconds(60))
 201
 202   defp idempotency_expiration,
 203     do: expiration(default: :timer.seconds(6 * 60 * 60), interval: :timer.seconds(60))
 204
 205   defp chat_message_id_idempotency_key_expiration,
 206     do: expiration(default: :timer.minutes(2), interval: :timer.seconds(60))
 207
 208   defp seconds_valid_interval,
 209     do: :timer.seconds(Config.get!([Pleroma.Captcha, :seconds_valid]))
 210
 211   @spec build_cachex(String.t(), keyword()) :: map()
 212   def build_cachex(type, opts),
 213     do: %{
 214       id: String.to_atom("cachex_" <> type),
 215       start: {Cachex, :start_link, [String.to_atom(type <> "_cache"), opts]},
 216       type: :worker
 217     }
 218
 219   defp chat_enabled?, do: Config.get([:chat, :enabled])
 220
 221   defp dont_run_in_test(env) when env in [:test, :benchmark], do: []
 222
 223   defp dont_run_in_test(_) do
 224     [
 225       {Registry,
 226        [
 227          name: Pleroma.Web.Streamer.registry(),
 228          keys: :duplicate,
 229          partitions: System.schedulers_online()
 230        ]}
 231     ] ++ background_migrators()
 232   end
 233
 234   defp background_migrators do
 235     [
 236       Pleroma.Migrators.HashtagsTableMigrator
 237     ]
 238   end
 239
 240   defp chat_child(true) do
 241     [
 242       Pleroma.Web.ChatChannel.ChatChannelState,
 243       {Phoenix.PubSub, [name: Pleroma.PubSub, adapter: Phoenix.PubSub.PG2]}
 244     ]
 245   end
 246
 247   defp chat_child(_), do: []
 248
 249   defp task_children(:test) do
 250     [
 251       %{
 252         id: :web_push_init,
 253         start: {Task, :start_link, [&Pleroma.Web.Push.init/0]},
 254         restart: :temporary
 255       }
 256     ]
 257   end
 258
 259   defp task_children(_) do
 260     [
 261       %{
 262         id: :web_push_init,
 263         start: {Task, :start_link, [&Pleroma.Web.Push.init/0]},
 264         restart: :temporary
 265       },
 266       %{
 267         id: :internal_fetch_init,
 268         start: {Task, :start_link, [&Pleroma.Web.ActivityPub.InternalFetchActor.init/0]},
 269         restart: :temporary
 270       }
 271     ]
 272   end
 273
 274   # start hackney and gun pools in tests
 275   defp http_children(_, :test) do
 276     http_children(Tesla.Adapter.Hackney, nil) ++ http_children(Tesla.Adapter.Gun, nil)
 277   end
 278
 279   defp http_children(Tesla.Adapter.Hackney, _) do
 280     pools = [:federation, :media]
 281
 282     pools =
 283       if Config.get([Pleroma.Upload, :proxy_remote]) do
 284         [:upload | pools]
 285       else
 286         pools
 287       end
 288
 289     for pool <- pools do
 290       options = Config.get([:hackney_pools, pool])
 291       :hackney_pool.child_spec(pool, options)
 292     end
 293   end
 294
 295   defp http_children(Tesla.Adapter.Gun, _) do
 296     Pleroma.Gun.ConnectionPool.children() ++
 297       [{Task, &Pleroma.HTTP.AdapterHelper.Gun.limiter_setup/0}]
 298   end
 299
 300   defp http_children(_, _), do: []
 301
 302   @spec limiters_setup() :: :ok
 303   def limiters_setup do
 304     config = Config.get(ConcurrentLimiter, [])
 305
 306     [Pleroma.Web.RichMedia.Helpers, Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy]
 307     |> Enum.each(fn module ->
 308       mod_config = Keyword.get(config, module, [])
 309
 310       max_running = Keyword.get(mod_config, :max_running, 5)
 311       max_waiting = Keyword.get(mod_config, :max_waiting, 5)
 312
 313       ConcurrentLimiter.new(module, max_running, max_waiting)
 314     end)
 315   end
 316 end