在代币发行日期上增加8小时 [英] add 8 hours to the token issuance date

问题描述

我有这个功能:

export const isTokenValid = () => {
  const isTokenExist = localStorage.getItem("TOKEN_AUTH");
  if (!isTokenExist) return false;
  const token = isTokenExist.split(" ")[1];
  const jwt = JSON.parse(atob(token.split(".")[1]));
  const iat = (jwt && jwt.iat * 1000) || null;
  console.log(iat);
  console.log(Date.now());
  const isExp = Date.now() > iat;
  if (isExp) {
    // localStorage.clear();
    return false;
  }
  return true;
};

在console.log()中:

In console.log() :

1516239022000
1585764070793

我必须检查令牌的有效期是从(iat)+8小时到现在为止.我怎样才能将Iat值增加8个小时.

I have to check is token valid from issued at (iat)+8 hours till now. How can i add 8 hours to iat value.

推荐答案

JWT中的时间戳是UNIX时间戳，从1970年1月1日00:00 UTC开始计数:

The timestamps in JWT are UNIX timestamps counting from 01.01.1970 00:00 UTC: https://tools.ietf.org/html/rfc7519#section-4.1.4 explains that a numeric date is used for the exp claim (and also for the nbf (not before) and iat (issued at) claims)

https://tools.ietf.org/html/rfc7519#section-2 定义数字日期:

一个JSON数值，表示从 1970-01-01T00:00:00Z UTC直到指定的UTC日期/时间，忽略 秒.

A JSON numeric value representing the number of seconds from 1970-01-01T00:00:00Z UTC until the specified UTC date/time, ignoring leap seconds.

3600秒是一小时，因此您将8 * 3600 = 28.800添加到令牌的原始iat值(1516239022). 但是，正如您的代码所示，不需要乘以1000.

3600 seconds are one hour, so you add 8*3600 = 28.800 to the original iat value from the token (1516239022). But there's no need, as seen in your code, to multiply with 1000.

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