请求头timestamp

在HTTP请求头中，timestamp是一个用于防止DoS攻击的参数。每次HTTP请求都需要在请求中加上timestamp参数，并且将timestamp和其他参数一起进行数字签名。服务器在接收到HTTP请求之后，会首先判断timestamp参数与当前时间的差值是否超过了60秒，如果超过了则认为是非法的请求。这样的机制可以有效地减轻DoS攻击的时间，并且通过数字签名机制可以处理黑客修改时间戳的问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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