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# File 'lib/grape-throttler/middleware/throttle_middleware.rb', line 9
def before
endpoint = env['api.endpoint']
logger = options[:logger] || Logger.new(STDOUT)
return unless throttle_options = endpoint.route_setting(:throttle)
limit, period = find_limit_and_period(throttle_options)
check_limit_and_period(limit, period)
limit = limit.call(env) if limit.is_a?(Proc)
return true if limit.negative?
user_value = find_user_value(options) || "ip:#{env['REMOTE_ADDR']}"
rate_key = generate_rate_key(endpoint, user_value)
begin
redis = options[:cache]
redis.ping
current = redis.get(rate_key).to_i
if !current.nil? && current >= limit
endpoint.error!('Too Many Requests', 429)
else
redis.multi do
redis.set(rate_key, COUNTER_START, { nx: true, ex: period.to_i })
redis.incr(rate_key)
end
end
rescue Exception => e
logger.warn(e.message)
end
end
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