[#1094] Rate-limited follow & unfollow actions.

config/config.exs

@@ -528,6 +528,8 @@ config :http_signatures,
 config :pleroma, :rate_limit,
   search: [{1000, 10}, {1000, 30}],
   app_account_creation: {1_800_000, 25},
+  relations_actions: {10_000, 10},
+  relation_id_action: {60_000, 2},
   statuses_actions: {10_000, 15},
   status_id_action: {60_000, 3}
 

docs/config.md

@@ -647,5 +647,7 @@ Supported rate limiters:
 
 * `:search` for the search requests (account & status search etc.)
 * `:app_account_creation` for registering user accounts from the same IP address
+* `:relations_actions` for actions on relations with other users (follow, unfollow)
+* `:relation_id_action` for actions on relation with specific another user (follow, unfollow)
 * `:statuses_actions` for create / delete / fav / unfav / reblog / unreblog actions on any statuses
 * `:status_id_action` for fav / unfav or reblog / unreblog actions on the same status by the same user

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -47,6 +47,8 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
 
   require Logger
 
+  @rate_limited_relations_actions ~w(follow unfollow)a
+
   @rate_limited_status_actions ~w(reblog_status unreblog_status fav_status unfav_status
     post_status delete_status)a
 
@@ -62,6 +64,12 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     when action in ~w(fav_status unfav_status)a
   )
 
+  plug(
+    RateLimiter,
+    {:relations_id_action, params: ["id", "uri"]} when action in @rate_limited_relations_actions
+  )
+
+  plug(RateLimiter, :relations_actions when action in @rate_limited_relations_actions)
   plug(RateLimiter, :statuses_actions when action in @rate_limited_status_actions)
   plug(RateLimiter, :app_account_creation when action == :account_register)
   plug(RateLimiter, :search when action in [:search, :search2, :account_search])