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Rate limit user input without using JavaScript

What are the possibilities for rate limiting user input without using JavaScript? The lesser round trips made to the server for this, the better.

没有JS,他们唯一的方法就是验证服务器上的输入,并向用户发送带有错误消息的页面。

您可以使用maxlength但也需要在后端进行验证。

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