46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
const redis = require("redis");
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const BroadcastChannel = require("../BroadcastChannel");
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class Redis {
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constructor() {
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this.client = redis.createClient({
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host:'127.0.0.1',
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port:'6379',
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ttl: 5*60*1000
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});
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this.client.on("error", function(error) {
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console.error(error);
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});
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this.client.send_command('config', ['set', 'notify-keyspace-events', 'Ex'], this.SubscribeExpired);
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}
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async get(key) {
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return new Promise((resolve)=>{
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this.client.get(key, (err,res) => resolve(res));
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})
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}
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set(key, value="") {
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this.client.set(key, value);
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// 设置key的过期时间60秒（其实也就是二维码的有效时间）
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this.client.expire(key, 60)
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}
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SubscribeExpired(e, r) {
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let sub = redis.createClient(6379);
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const expired_subKey = '__keyevent@0__:expired';
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sub.subscribe(expired_subKey, function () {
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sub.on('message', function (chan, msg) {
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console.log(`二维码：${msg} 已超时过期... `);
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// 二维码失效，通过 BroadcastChannel 通知 routes/socket.js
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BroadcastChannel.SubscribeExpired.postMessage(msg);
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});
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})
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}
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}
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module.exports = new Redis();
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