Rate limit game creation
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@ -12,7 +12,9 @@ config :chessh, RateLimits,
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max_concurrent_user_sessions: 5,
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player_session_message_burst_ms: 500,
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player_session_message_burst_rate: 8,
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player_public_keys: 15
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player_public_keys: 15,
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create_game_ms: 60 * 1000,
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create_game_rate: 2
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config :chessh, Web,
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github_oauth_login_url: "https://github.com/login/oauth/access_token",
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@ -45,17 +45,20 @@ defmodule Chessh.SSH.Client do
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screen_state_initials: screen_state_initials
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} = state
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) do
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{:ok, new_screen_pid} =
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GenServer.start_link(module, [%{screen_state_initial | client_pid: self()}])
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case GenServer.start_link(module, [%{screen_state_initial | client_pid: self()}]) do
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{:ok, new_screen_pid} ->
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send(new_screen_pid, {:render, width, height})
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send(new_screen_pid, {:render, width, height})
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{:noreply,
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%State{
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state
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| screen_pid: new_screen_pid,
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screen_state_initials: [{module, screen_state_initial} | screen_state_initials]
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}}
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{:noreply,
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%State{
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state
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| screen_pid: new_screen_pid,
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screen_state_initials: [{module, screen_state_initial} | screen_state_initials]
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}}
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_ ->
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{:noreply, state}
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end
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end
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@impl true
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@ -59,32 +59,59 @@ defmodule Chessh.SSH.Client.Game do
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end
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def init([
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%State{player_session: player_session, color: color, game: nil} = state
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%State{player_session: player_session, color: color, game: nil, client_pid: client_pid} =
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state
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| tail
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]) do
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# Starting a new game
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{:ok, %Game{} = game} =
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Game.changeset(
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%Game{},
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Map.merge(
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if(color == :light,
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do: %{light_player_id: player_session.player_id},
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else: %{dark_player_id: player_session.player_id}
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),
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%{
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fen: @default_fen
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}
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)
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)
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|> Repo.insert()
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[create_game_ms, create_game_rate] =
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Application.get_env(:chessh, RateLimits)
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|> Keyword.take([:create_game_ms, :create_game_rate])
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|> Keyword.values()
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init([
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%State{
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state
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| game: game
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}
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| tail
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])
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case Hammer.check_rate_inc(
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:redis,
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"player-#{state.player_session.id}-create-game-rate",
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create_game_ms,
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create_game_rate,
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1
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) do
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{:allow, _count} ->
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# Starting a new game
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{:ok, %Game{} = game} =
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Game.changeset(
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%Game{},
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Map.merge(
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if(color == :light,
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do: %{light_player_id: player_session.player_id},
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else: %{dark_player_id: player_session.player_id}
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),
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%{
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fen: @default_fen
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}
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)
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)
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|> Repo.insert()
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init([
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%State{
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state
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| game: game
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}
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| tail
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])
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{:deny, _limit} ->
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send(
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client_pid,
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{:send_to_ssh,
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[
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Utils.clear_codes(),
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"You are creating too many games, and have been rate limited. Try again later.\n"
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]}
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)
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{:stop, :normal, state}
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end
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end
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def init([
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