const redis = require('redis');
!(async function(){
    const client = await redis.createClient({
        host: '127.0.0.1',
        port: 6379
    });
    // 连接
    await client.connect().then(() => {
        console.log('redis connected');
    }).catch((err) => {
        console.log('redis connect error: ', err);
    });
    await client.set('hello', 'This is a value');
    const value = await client.get('hello');
    console.log(value)
}())