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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
# frozen_string_literal: true
module Gitlab
# This class implements a simple rate limiter that can be used to throttle
# certain actions. Unlike Rack Attack and Rack::Throttle, which operate at
# the middleware level, this can be used at the controller or API level.
#
# @example
# if Gitlab::ApplicationRateLimiter.throttled?(:project_export, scope: [@project, @current_user])
# flash[:alert] = 'error!'
# redirect_to(edit_project_path(@project), status: :too_many_requests)
# end
class ApplicationRateLimiter
class << self
# Application rate limits
#
# Threshold value can be either an Integer or a Proc
# in order to not evaluate it's value every time this method is called
# and only do that when it's needed.
def rate_limits
{
issues_create: { threshold: -> { application_settings.issues_create_limit }, interval: 1.minute },
project_export: { threshold: -> { application_settings.project_export_limit }, interval: 1.minute },
project_download_export: { threshold: -> { application_settings.project_download_export_limit }, interval: 1.minute },
project_repositories_archive: { threshold: 5, interval: 1.minute },
project_generate_new_export: { threshold: -> { application_settings.project_export_limit }, interval: 1.minute },
project_import: { threshold: -> { application_settings.project_import_limit }, interval: 1.minute },
project_testing_hook: { threshold: 5, interval: 1.minute },
play_pipeline_schedule: { threshold: 1, interval: 1.minute },
show_raw_controller: { threshold: -> { application_settings.raw_blob_request_limit }, interval: 1.minute },
group_export: { threshold: -> { application_settings.group_export_limit }, interval: 1.minute },
group_download_export: { threshold: -> { application_settings.group_download_export_limit }, interval: 1.minute },
group_import: { threshold: -> { application_settings.group_import_limit }, interval: 1.minute },
group_testing_hook: { threshold: 5, interval: 1.minute },
profile_add_new_email: { threshold: 5, interval: 1.minute },
profile_resend_email_confirmation: { threshold: 5, interval: 1.minute },
update_environment_canary_ingress: { threshold: 1, interval: 1.minute }
}.freeze
end
# Increments the given key and returns true if the action should
# be throttled.
#
# @param key [Symbol] Key attribute registered in `.rate_limits`
# @option scope [Array<ActiveRecord>] Array of ActiveRecord models to scope throttling to a specific request (e.g. per user per project)
# @option threshold [Integer] Optional threshold value to override default one registered in `.rate_limits`
# @option interval [Integer] Optional interval value to override default one registered in `.rate_limits`
#
# @return [Boolean] Whether or not a request should be throttled
def throttled?(key, scope: nil, interval: nil, threshold: nil)
return unless rate_limits[key]
threshold_value = threshold || threshold(key)
threshold_value > 0 &&
increment(key, scope, interval) > threshold_value
end
# Increments the given cache key and increments the value by 1 with the
# expiration interval defined in `.rate_limits`.
#
# @param key [Symbol] Key attribute registered in `.rate_limits`
# @option scope [Array<ActiveRecord>] Array of ActiveRecord models to scope throttling to a specific request (e.g. per user per project)
# @option interval [Integer] Optional interval value to override default one registered in `.rate_limits`
#
# @return [Integer] incremented value
def increment(key, scope, interval = nil)
value = 0
interval_value = interval || interval(key)
Gitlab::Redis::Cache.with do |redis|
cache_key = action_key(key, scope)
value = redis.incr(cache_key)
redis.expire(cache_key, interval_value) if value == 1
end
value
end
# Logs request using provided logger
#
# @param request [Http::Request] - Web request to be logged
# @param type [Symbol] A symbol key that represents the request
# @param current_user [User] Current user of the request, it can be nil
# @param logger [Logger] Logger to log request to a specific log file. Defaults to Gitlab::AuthLogger
def log_request(request, type, current_user, logger = Gitlab::AuthLogger)
request_information = {
message: 'Application_Rate_Limiter_Request',
env: type,
remote_ip: request.ip,
request_method: request.request_method,
path: request.fullpath
}
if current_user
request_information.merge!({
user_id: current_user.id,
username: current_user.username
})
end
logger.error(request_information)
end
private
def threshold(key)
value = rate_limit_value_by_key(key, :threshold)
return value.call if value.is_a?(Proc)
value.to_i
end
def interval(key)
rate_limit_value_by_key(key, :interval).to_i
end
def rate_limit_value_by_key(key, setting)
action = rate_limits[key]
action[setting] if action
end
def action_key(key, scope)
composed_key = [key, scope].flatten.compact
serialized = composed_key.map do |obj|
if obj.is_a?(String) || obj.is_a?(Symbol)
"#{obj}"
else
"#{obj.class.model_name.to_s.underscore}:#{obj.id}"
end
end.join(":")
"application_rate_limiter:#{serialized}"
end
def application_settings
Gitlab::CurrentSettings.current_application_settings
end
end
end
end
|
