node.js Redis - 如何每天使密钥过期
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Redis - How to expire key daily
提问by bless1204
I know that EXPIREAT in Redis is used to specify when a key will expire. My problem though is that it takes an absolute UNIX timestamp. I'm finding a hard time thinking about what I should set as an argument if I want the key to expire at the end of the day.
我知道 Redis 中的 EXPIREAT 用于指定密钥何时到期。我的问题是它需要一个绝对的 UNIX 时间戳。如果我希望密钥在一天结束时到期，我很难考虑应该设置什么作为参数。
This is how I set my key:
这是我设置密钥的方式：
client.set(key, body);
client.set(key, body);
So to set the expire at:
因此，将到期时间设置为：
client.expireat(key, ???);
client.expireat(key, ???);
Any ideas? I'm using this with nodejs and sailsjs Thanks!
有任何想法吗？我正在将它与 nodejs 和 Sailsjs 一起使用 谢谢！
回答by laggingreflex
If you want to expire it 24 hrs later
如果您想在 24 小时后到期
client.expireat(key, parseInt((+new Date)/1000) + 86400);
Or if you want it to expire exactly at the end of today, you can use .setHourson a new Date()object to get the time at the end of the day, and use that.
或者，如果您希望它恰好在今天结束时到期，您可以.setHours在new Date()对象上使用以获取一天结束时的时间，然后使用它。
var todayEnd = new Date().setHours(23, 59, 59, 999);
client.expireat(key, parseInt(todayEnd/1000));
回答by loretoparisi
回答by Praveena
You can set value and expiry together.
您可以同时设置 value 和 expiry。
//here key will expire after 24 hours
client.setex(key, 24*60*60, value, function(err, result) {
//check for success/failure here
});
//here key will expire at end of the day
client.setex(key, parseInt((new Date().setHours(23, 59, 59, 999)-new Date())/1000), value, function(err, result) {
//check for success/failure here
});
