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用户在某个时间段内操作频繁提示输入验证码，这个该怎么实现？

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Release： 2016-06-06 20:20:59
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用户发送私信的功能，假设用户在3分钟内连续发了10条私信，则系统提示输入验证码，这个在后端该怎么实现？

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用户发送私信的功能，假设用户在3分钟内连续发了10条私信，则系统提示输入验证码，这个在后端该怎么实现？

使用redis incr user:acc expire 180
如果user:acc大于3拒绝

1，发送之前检查3分钟之内发送的条数，用sql
2，session里记录最近10条发消息的时间，用循环数组

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