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# frozen_string_literal: true
module Gitlab
module WebHooks
class RateLimiter
include Gitlab::Utils::StrongMemoize
LIMIT_NAME = :web_hook_calls
NO_LIMIT = 0
# SystemHooks (instance admin hooks) and ServiceHooks (integration hooks)
# are not rate-limited.
EXCLUDED_HOOK_TYPES = %w(SystemHook ServiceHook).freeze
def initialize(hook)
@hook = hook
@parent = hook.parent
end
# Increments the rate-limit counter.
# Returns true if the hook should be rate-limited.
def rate_limit!
return false if no_limit?
::Gitlab::ApplicationRateLimiter.throttled?(
limit_name,
scope: [root_namespace],
threshold: limit
)
end
# Returns true if the hook is currently over its rate-limit.
# It does not increment the rate-limit counter.
def rate_limited?
return false if no_limit?
Gitlab::ApplicationRateLimiter.peek(
limit_name,
scope: [root_namespace],
threshold: limit
)
end
def limit
strong_memoize(:limit) do
next NO_LIMIT if hook.class.name.in?(EXCLUDED_HOOK_TYPES)
root_namespace.actual_limits.limit_for(limit_name) || NO_LIMIT
end
end
private
attr_reader :hook, :parent
def no_limit?
limit == NO_LIMIT
end
def root_namespace
@root_namespace ||= parent.root_ancestor
end
def limit_name
LIMIT_NAME
end
end
end
end
Gitlab::WebHooks::RateLimiter.prepend_mod
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