Module: Gitlab::ApplicationRateLimiter

Defined in:
lib/gitlab/application_rate_limiter.rb,
lib/gitlab/application_rate_limiter/base_strategy.rb,
lib/gitlab/application_rate_limiter/increment_per_action.rb,
lib/gitlab/application_rate_limiter/increment_per_actioned_resource.rb

Overview

This module 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. See CheckRateLimit concern for usage.

Defined Under Namespace

Classes: BaseStrategy, IncrementPerAction, IncrementPerActionedResource

Constant Summary collapse

InvalidKeyError = 
Class.new(StandardError)

Class Method Summary collapse

Class Method Details

.log_request(request, type, current_user, logger = Gitlab::AuthLogger) ⇒ Object

Logs request using provided logger

Parameters:

  • request (Http::Request) —

    • Web request to be logged

  • type (Symbol) —

    A symbol key that represents the request

  • current_user (User) —

    Current user of the request, it can be nil

  • logger (Logger) (defaults to: Gitlab::AuthLogger) —

    Logger to log request to a specific log file. Defaults to Gitlab::AuthLogger



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# File 'lib/gitlab/application_rate_limiter.rb', line 176

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

.peek(key, scope:, threshold: nil, interval: nil, users_allowlist: nil) ⇒ Boolean

Returns the current rate limited state without incrementing the count.

Parameters:

  • key (Symbol) —

    Key attribute registered in ‘.rate_limits`

  • scope (Array<ActiveRecord>) —

    Array of ActiveRecord models to scope throttling to a specific request (e.g. per user per project)

  • threshold (Integer) (defaults to: nil) —

    Optional threshold value to override default one registered in ‘.rate_limits`

  • interval (Integer) (defaults to: nil) —

    Optional interval value to override default one registered in ‘.rate_limits`

  • users_allowlist (Array<String>) (defaults to: nil) —

    Optional list of usernames to exclude from the limit. This param will only be functional if Scope includes a current user.

Returns:

  • (Boolean) —

    Whether or not a request is currently throttled



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# File 'lib/gitlab/application_rate_limiter.rb', line 166

def peek(key, scope:, threshold: nil, interval: nil, users_allowlist: nil)
  throttled?(key, peek: true, scope: scope, threshold: threshold, interval: interval, users_allowlist: users_allowlist)
end

.rate_limits ⇒ Object

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.



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# File 'lib/gitlab/application_rate_limiter.rb', line 17

def rate_limits # rubocop:disable Metrics/AbcSize
  {
    issues_create: { threshold: -> { application_settings.issues_create_limit }, interval: 1.minute },
    notes_create: { threshold: -> { application_settings.notes_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 },
    raw_blob: { 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 },
    member_delete: { threshold: 60, interval: 1.minute },
    profile_add_new_email: { threshold: 5, interval: 1.minute },
    web_hook_calls: { interval: 1.minute },
    web_hook_calls_mid: { interval: 1.minute },
    web_hook_calls_low: { interval: 1.minute },
    users_get_by_id: { threshold: -> { application_settings.users_get_by_id_limit }, interval: 10.minutes },
    username_exists: { threshold: 20, interval: 1.minute },
    user_sign_up: { threshold: 20, interval: 1.minute },
    user_sign_in: { threshold: 5, interval: 10.minutes },
    profile_resend_email_confirmation: { threshold: 5, interval: 1.minute },
    profile_update_username: { threshold: 10, interval: 1.minute },
    update_environment_canary_ingress: { threshold: 1, interval: 1.minute },
    auto_rollback_deployment: { threshold: 1, interval: 3.minutes },
    search_rate_limit: { threshold: -> { application_settings.search_rate_limit }, interval: 1.minute },
    search_rate_limit_unauthenticated: { threshold: -> { application_settings.search_rate_limit_unauthenticated }, interval: 1.minute },
    gitlab_shell_operation: { threshold: application_settings.gitlab_shell_operation_limit, interval: 1.minute },
    pipelines_create: { threshold: -> { application_settings.pipeline_limit_per_project_user_sha }, interval: 1.minute },
    temporary_email_failure: { threshold: 300, interval: 1.day },
    permanent_email_failure: { threshold: 5, interval: 1.day },
    project_testing_integration: { threshold: 5, interval: 1.minute },
    email_verification: { threshold: 10, interval: 10.minutes },
    email_verification_code_send: { threshold: 10, interval: 1.hour },
    phone_verification_send_code: { threshold: 10, interval: 1.hour },
    phone_verification_verify_code: { threshold: 10, interval: 10.minutes },
    namespace_exists: { threshold: 20, interval: 1.minute },
    fetch_google_ip_list: { threshold: 10, interval: 1.minute },
    project_fork_sync: { threshold: 10, interval: 30.minutes },
    ai_action: { threshold: 160, interval: 8.hours },
    jobs_index: { threshold: 600, interval: 1.minute },
    bulk_import: { threshold: 6, interval: 1.minute },
    projects_api_rate_limit_unauthenticated: {
      threshold: -> { application_settings.projects_api_rate_limit_unauthenticated }, interval: 10.minutes
    }
  }.freeze
end

.throttled?(key, scope:, resource: nil, threshold: nil, interval: nil, users_allowlist: nil, peek: false) ⇒ Boolean

Increments the given key and returns true if the action should be throttled.

Parameters:

  • key (Symbol) —

    Key attribute registered in ‘.rate_limits`

  • scope (Array<ActiveRecord>) —

    Array of ActiveRecord models, Strings or Symbols to scope throttling to a specific request (e.g. per user per project)

  • resource (ActiveRecord) (defaults to: nil) —

    An ActiveRecord model to count an action for (e.g. limit unique project (resource) downloads (action) to five per user (scope))

  • threshold (Integer) (defaults to: nil) —

    Optional threshold value to override default one registered in ‘.rate_limits`

  • interval (Integer) (defaults to: nil) —

    Optional interval value to override default one registered in ‘.rate_limits`

  • users_allowlist (Array<String>) (defaults to: nil) —

    Optional list of usernames to exclude from the limit. This param will only be functional if Scope includes a current user.

  • peek (Boolean) (defaults to: false) —

    Optional. When true the key will not be incremented but the current throttled state will be returned.

Returns:

  • (Boolean) —

    Whether or not a request should be throttled

Raises:



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# File 'lib/gitlab/application_rate_limiter.rb', line 90

def throttled?(key, scope:, resource: nil, threshold: nil, interval: nil, users_allowlist: nil, peek: false)
  raise InvalidKeyError unless rate_limits[key]

  strategy = resource.present? ? IncrementPerActionedResource.new(resource.id) : IncrementPerAction.new

  ::Gitlab::Instrumentation::RateLimitingGates.track(key)

  return false if scoped_user_in_allowlist?(scope, users_allowlist)

  threshold_value = threshold || threshold(key)

  return false if threshold_value == 0

  interval_value = interval || interval(key)

  return false if interval_value == 0

  # `period_key` is based on the current time and interval so when time passes to the next interval
  # the key changes and the rate limit count starts again from 0.
  # Based on https://github.com/rack/rack-attack/blob/886ba3a18d13c6484cd511a4dc9b76c0d14e5e96/lib/rack/attack/cache.rb#L63-L68
  period_key, time_elapsed_in_period = Time.now.to_i.divmod(interval_value)
  cache_key = cache_key(key, scope, period_key)

  value = if peek
            strategy.read(cache_key)
          else
            # We add a 1 second buffer to avoid timing issues when we're at the end of a period
            expiry = interval_value - time_elapsed_in_period + 1

            strategy.increment(cache_key, expiry)
          end

  value > threshold_value
end

.throttled_request?(request, current_user, key, scope:, **options) ⇒ Boolean

Similar to #throttled? above but checks for the bypass header in the request and logs the request when it is over the rate limit

Parameters:

  • request (Http::Request) —

    • Web request used to check the header and log

  • current_user (User) —

    Current user of the request, it can be nil

  • key (Symbol) —

    Key attribute registered in ‘.rate_limits`

  • scope (Array<ActiveRecord>) —

    Array of ActiveRecord models, Strings or Symbols to scope throttling to a specific request (e.g. per user per project)

  • resource (ActiveRecord) —

    An ActiveRecord model to count an action for (e.g. limit unique project (resource) downloads (action) to five per user (scope))

  • threshold (Integer) —

    Optional threshold value to override default one registered in ‘.rate_limits`

  • interval (Integer) —

    Optional interval value to override default one registered in ‘.rate_limits`

  • users_allowlist (Array<String>) —

    Optional list of usernames to exclude from the limit. This param will only be functional if Scope includes a current user.

  • peek (Boolean) —

    Optional. When true the key will not be incremented but the current throttled state will be returned.

Returns:

  • (Boolean) —

    Whether or not a request should be throttled



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# File 'lib/gitlab/application_rate_limiter.rb', line 147

def throttled_request?(request, current_user, key, scope:, **options)
  if ::Gitlab::Throttle.bypass_header.present? && request.get_header(Gitlab::Throttle.bypass_header) == '1'
    return false
  end

  throttled?(key, scope: scope, **options).tap do |throttled|
    log_request(request, "#{key}_request_limit".to_sym, current_user) if throttled
  end
end