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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 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   @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.base_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, @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         ] ++
 102         task_children(@env) ++
 103         dont_run_in_test(@env) ++
 104         chat_child(chat_enabled?()) ++
 105         [
 106           Pleroma.Web.Endpoint,
 107           Pleroma.Gopher.Server
 108         ]
 109
 110     # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
 111     # for other strategies and supported options
 112     opts = [strategy: :one_for_one, name: Pleroma.Supervisor]
 113     result = Supervisor.start_link(children, opts)
 114
 115     set_postgres_server_version()
 116
 117     result
 118   end
 119
 120   defp set_postgres_server_version do
 121     version =
 122       with %{rows: [[version]]} <- Ecto.Adapters.SQL.query!(Pleroma.Repo, "show server_version"),
 123            {num, _} <- Float.parse(version) do
 124         num
 125       else
 126         e ->
 127           Logger.warn(
 128             "Could not get the postgres version: #{inspect(e)}.\nSetting the default value of 9.6"
 129           )
 130
 131           9.6
 132       end
 133
 134     Application.put_env(:postgres, :version, version)
 135   end
 136
 137   def load_custom_modules do
 138     dir = Config.get([:modules, :runtime_dir])
 139
 140     if dir && File.exists?(dir) do
 141       dir
 142       |> Pleroma.Utils.compile_dir()
 143       |> case do
 144         {:error, _errors, _warnings} ->
 145           raise "Invalid custom modules"
 146
 147         {:ok, modules, _warnings} ->
 148           if @env != :test do
 149             Enum.each(modules, fn mod ->
 150               Logger.info("Custom module loaded: #{inspect(mod)}")
 151             end)
 152           end
 153
 154           :ok
 155       end
 156     end
 157   end
 158
 159   defp setup_instrumenters do
 160     require Prometheus.Registry
 161
 162     if Application.get_env(:prometheus, Pleroma.Repo.Instrumenter) do
 163       :ok =
 164         :telemetry.attach(
 165           "prometheus-ecto",
 166           [:pleroma, :repo, :query],
 167           &Pleroma.Repo.Instrumenter.handle_event/4,
 168           %{}
 169         )
 170
 171       Pleroma.Repo.Instrumenter.setup()
 172     end
 173
 174     Pleroma.Web.Endpoint.MetricsExporter.setup()
 175     Pleroma.Web.Endpoint.PipelineInstrumenter.setup()
 176
 177     # Note: disabled until prometheus-phx is integrated into prometheus-phoenix:
 178     # Pleroma.Web.Endpoint.Instrumenter.setup()
 179     PrometheusPhx.setup()
 180   end
 181
 182   defp cachex_children do
 183     [
 184       build_cachex("used_captcha", ttl_interval: seconds_valid_interval()),
 185       build_cachex("user", default_ttl: 25_000, ttl_interval: 1000, limit: 2500),
 186       build_cachex("object", default_ttl: 25_000, ttl_interval: 1000, limit: 2500),
 187       build_cachex("rich_media", default_ttl: :timer.minutes(120), limit: 5000),
 188       build_cachex("scrubber", limit: 2500),
 189       build_cachex("idempotency", expiration: idempotency_expiration(), limit: 2500),
 190       build_cachex("web_resp", limit: 2500),
 191       build_cachex("emoji_packs", expiration: emoji_packs_expiration(), limit: 10),
 192       build_cachex("failed_proxy_url", limit: 2500),
 193       build_cachex("banned_urls", default_ttl: :timer.hours(24 * 30), limit: 5_000),
 194       build_cachex("chat_message_id_idempotency_key",
 195         expiration: chat_message_id_idempotency_key_expiration(),
 196         limit: 500_000
 197       )
 198     ]
 199   end
 200
 201   defp emoji_packs_expiration,
 202     do: expiration(default: :timer.seconds(5 * 60), interval: :timer.seconds(60))
 203
 204   defp idempotency_expiration,
 205     do: expiration(default: :timer.seconds(6 * 60 * 60), interval: :timer.seconds(60))
 206
 207   defp chat_message_id_idempotency_key_expiration,
 208     do: expiration(default: :timer.minutes(2), interval: :timer.seconds(60))
 209
 210   defp seconds_valid_interval,
 211     do: :timer.seconds(Config.get!([Pleroma.Captcha, :seconds_valid]))
 212
 213   @spec build_cachex(String.t(), keyword()) :: map()
 214   def build_cachex(type, opts),
 215     do: %{
 216       id: String.to_atom("cachex_" <> type),
 217       start: {Cachex, :start_link, [String.to_atom(type <> "_cache"), opts]},
 218       type: :worker
 219     }
 220
 221   defp chat_enabled?, do: Config.get([:chat, :enabled])
 222
 223   defp dont_run_in_test(env) when env in [:test, :benchmark], do: []
 224
 225   defp dont_run_in_test(_) do
 226     [
 227       {Registry,
 228        [
 229          name: Pleroma.Web.Streamer.registry(),
 230          keys: :duplicate,
 231          partitions: System.schedulers_online()
 232        ]}
 233     ]
 234   end
 235
 236   defp chat_child(true) do
 237     [
 238       Pleroma.Web.ChatChannel.ChatChannelState,
 239       {Phoenix.PubSub, [name: Pleroma.PubSub, adapter: Phoenix.PubSub.PG2]}
 240     ]
 241   end
 242
 243   defp chat_child(_), do: []
 244
 245   defp task_children(:test) do
 246     [
 247       %{
 248         id: :web_push_init,
 249         start: {Task, :start_link, [&Pleroma.Web.Push.init/0]},
 250         restart: :temporary
 251       }
 252     ]
 253   end
 254
 255   defp task_children(_) do
 256     [
 257       %{
 258         id: :web_push_init,
 259         start: {Task, :start_link, [&Pleroma.Web.Push.init/0]},
 260         restart: :temporary
 261       },
 262       %{
 263         id: :internal_fetch_init,
 264         start: {Task, :start_link, [&Pleroma.Web.ActivityPub.InternalFetchActor.init/0]},
 265         restart: :temporary
 266       }
 267     ]
 268   end
 269
 270   # start hackney and gun pools in tests
 271   defp http_children(_, :test) do
 272     http_children(Tesla.Adapter.Hackney, nil) ++ http_children(Tesla.Adapter.Gun, nil)
 273   end
 274
 275   defp http_children(Tesla.Adapter.Hackney, _) do
 276     pools = [:federation, :media]
 277
 278     pools =
 279       if Config.get([Pleroma.Upload, :proxy_remote]) do
 280         [:upload | pools]
 281       else
 282         pools
 283       end
 284
 285     for pool <- pools do
 286       options = Config.get([:hackney_pools, pool])
 287       :hackney_pool.child_spec(pool, options)
 288     end
 289   end
 290
 291   defp http_children(Tesla.Adapter.Gun, _) do
 292     Pleroma.Gun.ConnectionPool.children() ++
 293       [{Task, &Pleroma.HTTP.AdapterHelper.Gun.limiter_setup/0}]
 294   end
 295
 296   defp http_children(_, _), do: []
 297
 298   @spec limiters_setup() :: :ok
 299   def limiters_setup do
 300     [Pleroma.Web.RichMedia.Helpers, Pleroma.Web.MediaProxy]
 301     |> Enum.each(&ConcurrentLimiter.new(&1, 1, 0))
 302   end
 303 end