94 lines
2.7 KiB
Ruby
94 lines
2.7 KiB
Ruby
# frozen_string_literal: true
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module RateLimitedService
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extend ActiveSupport::Concern
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RateLimitedNotSetupError = Class.new(StandardError)
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class RateLimitedError < StandardError
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def initialize(key:, rate_limiter:)
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@key = key
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@rate_limiter = rate_limiter
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end
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def headers
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# TODO: This will be fleshed out in https://gitlab.com/gitlab-org/gitlab/-/issues/342370
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{}
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end
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def log_request(request, current_user)
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rate_limiter.class.log_request(request, "#{key}_request_limit".to_sym, current_user)
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end
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private
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attr_reader :key, :rate_limiter
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end
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class RateLimiterScopedAndKeyed
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attr_reader :key, :opts, :rate_limiter_klass
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def initialize(key:, opts:, rate_limiter_klass:)
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@key = key
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@opts = opts
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@rate_limiter_klass = rate_limiter_klass
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end
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def rate_limit!(service)
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evaluated_scope = evaluated_scope_for(service)
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return if feature_flag_disabled?(evaluated_scope[:project])
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rate_limiter = new_rate_limiter(evaluated_scope)
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if rate_limiter.throttled?
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raise RateLimitedError.new(key: key, rate_limiter: rate_limiter), _('This endpoint has been requested too many times. Try again later.')
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end
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end
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private
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def users_allowlist
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@users_allowlist ||= opts[:users_allowlist] ? opts[:users_allowlist].call : []
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end
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def evaluated_scope_for(service)
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opts[:scope].each_with_object({}) do |var, all|
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all[var] = service.public_send(var) # rubocop: disable GitlabSecurity/PublicSend
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end
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end
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def feature_flag_disabled?(project)
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Feature.disabled?("rate_limited_service_#{key}", project, default_enabled: :yaml)
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end
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def new_rate_limiter(evaluated_scope)
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rate_limiter_klass.new(key, **opts.merge(scope: evaluated_scope.values, users_allowlist: users_allowlist))
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end
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end
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prepended do
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attr_accessor :rate_limiter_bypassed
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cattr_accessor :rate_limiter_scoped_and_keyed
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def self.rate_limit(key:, opts:, rate_limiter_klass: ::Gitlab::ApplicationRateLimiter)
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self.rate_limiter_scoped_and_keyed = RateLimiterScopedAndKeyed.new(key: key,
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opts: opts,
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rate_limiter_klass: rate_limiter_klass)
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end
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end
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def execute_without_rate_limiting(*args, **kwargs)
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self.rate_limiter_bypassed = true
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execute(*args, **kwargs)
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ensure
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self.rate_limiter_bypassed = false
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end
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def execute(*args, **kwargs)
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raise RateLimitedNotSetupError if rate_limiter_scoped_and_keyed.nil?
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rate_limiter_scoped_and_keyed.rate_limit!(self) unless rate_limiter_bypassed
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super
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end
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end
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