add email_in_limit to store email address that send count less than limit value. add email_out_limit to store email address that send count beyond limit value.
the email queues email_in_limit/email_out_limit will be reset everyday at 00:00, every time send mail to an email address, the value for the mail address in email_in_limit will +1, until the value up to the limited value, the email address will be moved to email_out_limit, and the email send to the address will be throw away.
Signed-off-by: Luan Shengde shdluan@163.com --- lib/mail-post/email_limit_queue.rb | 62 ++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100755 lib/mail-post/email_limit_queue.rb
diff --git a/lib/mail-post/email_limit_queue.rb b/lib/mail-post/email_limit_queue.rb new file mode 100755 index 0000000..c7e3954 --- /dev/null +++ b/lib/mail-post/email_limit_queue.rb @@ -0,0 +1,62 @@ +#!/usr/bin/env ruby +# SPDX-License-Identifier: MulanPSL-2.0+ +# Copyright (c) 2020 Huawei Technologies Co., Ltd. All rights reserved. +# frozen_string_literal: true + +require 'json' +require 'redis' + +# check if the emails count has beyond the limit. +# email_in_limit is used to store email address email count +# less than the limit value. +# email_out_limit is used to store email address email count +# beyond the limit. +# case the email is the first one for the day, the email will +# be add to email_in_limit with value 1. +# case the email in email_in_limit but email count less than the +# limit value, its value will +1. +# case the email's email count up to the limit value, the email +# will be moved to email_out_limit. +# when the email is in email_out_limit, if send mail to the email +# address, the email will be kicked out from the email address bar. +class EmailRateLimit + def initialize(mail_info) + @mail_info = mail_info + @redis = Redis.new('host' => REDIS_HOST, 'port' => REDIS_PORT) + end + + def check_email_counts + email_to = @mail_info['to'].clone + email_cc = @mail_info['cc'].clone + @mail_info['to'] = check_emails(email_to) + @mail_info['cc'] = check_emails(email_cc) + + return @mail_info + end + + def check_emails(mail_list) + return if mail_list.nil? || mail_list.empty? + + mail_list.clone.each do |email| + if @redis.hexists 'email_out_limit', email + mail_list -= [email] + next + elsif @redis.hexists 'email_in_limit', email + email_account = @redis.hget 'email_in_limit', email + @redis.hset 'email_in_limit', email, email_account.to_i + 1 + else + @redis.hset 'email_in_limit', email, 1 + end + + change_queue(email) + end + return mail_list + end + + def change_queue(email) + return unless (@redis.hget 'email_in_limit', email).to_i >= 10 + + @redis.hdel 'email_in_limit', email + @redis.hset 'email_out_limit', email, 10 + end +end