const PORT = //put the port number. 6379 by default
const HOST = //host addres
const PWD = //password
const DB = //db instance to connect, it varies from 0-15

var rds = require("redis");

//client retornado. conexão se for usar ssl, se não, não precisa usar tls.
var cli = rds.createClient(PORT, HOST, { auth_pass: PWD, tls: { servername: HOST } });

var fs = require("fs");


let keys = null;

cli.on('connect', (err, res) => {
	cli.select(DB, () => {
		if (err) throw err;
		console.log('INFO:: DB ', DB, ' selected.')
	})

	cli.KEYS("*", (err, reply) => {
		if (err) throw err;
		keys = reply;
		keys = JSON.stringify(keys);
		fs.writeFile("keys.json", keys, () => { console.log("Done!") });
		console.log(reply.length);
		cli.quit();
	});
});