about summary refs log tree commit diff
path: root/config/initializers/rack_attack.rb
blob: f11e87b11408b813f9ec025ea34ebdb60c61f994 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
# frozen_string_literal: true

require 'doorkeeper/grape/authorization_decorator'

class Rack::Attack
  class Request
    def authenticated_token
      return @token if defined?(@token)

      @token = Doorkeeper::OAuth::Token.authenticate(
        Doorkeeper::Grape::AuthorizationDecorator.new(self),
        *Doorkeeper.configuration.access_token_methods
      )
    end

    def remote_ip
      @remote_ip ||= (@env["action_dispatch.remote_ip"] || ip).to_s
    end

    def authenticated_user_id
      authenticated_token&.resource_owner_id
    end

    def unauthenticated?
      !authenticated_user_id
    end

    def api_request?
      path.start_with?('/api')
    end

    def web_request?
      !api_request?
    end

    def paging_request?
      params['page'].present? || params['min_id'].present? || params['max_id'].present? || params['since_id'].present?
    end
  end

  Rack::Attack.safelist('allow from localhost') do |req|
    req.remote_ip == '127.0.0.1' || req.remote_ip == '::1'
  end

  throttle('throttle_authenticated_api', limit: 300, period: 5.minutes) do |req|
    req.authenticated_user_id if req.api_request?
  end

  throttle('throttle_unauthenticated_api', limit: 300, period: 5.minutes) do |req|
    req.remote_ip if req.api_request? && req.unauthenticated?
  end

  throttle('throttle_api_media', limit: 30, period: 30.minutes) do |req|
    req.authenticated_user_id if req.post? && req.path.start_with?('/api/v1/media')
  end

  throttle('throttle_media_proxy', limit: 30, period: 10.minutes) do |req|
    req.remote_ip if req.path.start_with?('/media_proxy')
  end

  throttle('throttle_api_sign_up', limit: 5, period: 30.minutes) do |req|
    req.remote_ip if req.post? && req.path == '/api/v1/accounts'
  end

  throttle('throttle_authenticated_paging', limit: 300, period: 15.minutes) do |req|
    req.authenticated_user_id if req.paging_request?
  end

  throttle('throttle_unauthenticated_paging', limit: 300, period: 15.minutes) do |req|
    req.remote_ip if req.paging_request? && req.unauthenticated?
  end

  API_DELETE_REBLOG_REGEX = /\A\/api\/v1\/statuses\/[\d]+\/unreblog/.freeze
  API_DELETE_STATUS_REGEX = /\A\/api\/v1\/statuses\/[\d]+/.freeze

  throttle('throttle_api_delete', limit: 30, period: 30.minutes) do |req|
    req.authenticated_user_id if (req.post? && req.path =~ API_DELETE_REBLOG_REGEX) || (req.delete? && req.path =~ API_DELETE_STATUS_REGEX)
  end

  throttle('throttle_sign_up_attempts/ip', limit: 25, period: 5.minutes) do |req|
    req.remote_ip if req.post? && req.path == '/auth'
  end

  throttle('throttle_password_resets/ip', limit: 25, period: 5.minutes) do |req|
    req.remote_ip if req.post? && req.path == '/auth/password'
  end

  throttle('throttle_password_resets/email', limit: 5, period: 30.minutes) do |req|
    req.params.dig('user', 'email').presence if req.post? && req.path == '/auth/password'
  end

  throttle('throttle_email_confirmations/ip', limit: 25, period: 5.minutes) do |req|
    req.remote_ip if req.post? && req.path == '/auth/confirmation'
  end

  throttle('throttle_email_confirmations/email', limit: 5, period: 30.minutes) do |req|
    req.params.dig('user', 'email').presence if req.post? && req.path == '/auth/password'
  end

  throttle('throttle_login_attempts/ip', limit: 25, period: 5.minutes) do |req|
    req.remote_ip if req.post? && req.path == '/auth/sign_in'
  end

  throttle('throttle_login_attempts/email', limit: 25, period: 1.hour) do |req|
    req.session[:attempt_user_id] || req.params.dig('user', 'email').presence if req.post? && req.path == '/auth/sign_in'
  end

  throttle('throttle_matrix_auth_attempts/ip', limit: 5, period: 1.minute) do |req|
    req.remote_ip if req.path == '/_matrix-internal/identity/v1/check_credentials'
  end

  self.throttled_response = lambda do |env|
    now        = Time.now.utc
    match_data = env['rack.attack.match_data']

    headers = {
      'Content-Type'          => 'application/json',
      'X-RateLimit-Limit'     => match_data[:limit].to_s,
      'X-RateLimit-Remaining' => '0',
      'X-RateLimit-Reset'     => (now + (match_data[:period] - now.to_i % match_data[:period])).iso8601(6),
    }

    [429, headers, [{ error: I18n.t('errors.429') }.to_json]]
  end
end