quickly finish RTMP handshake

rtmp.js

const net = require('net');
const Client = new net.Socket();


Client.connect({
    port: 1935,
    host: "6721.liveplay.myqcloud.com"
}, () => {
	console.log('connected')
	Client.write(RTMP_C.getC01);

});

Client.on('data',res=>{
    if(!res){
        console.warn('received empty Buffer ' + res);
        return;
    }
	// start to decode res package
    if(!RTMP_C.S0 && res.length>0){
        RTMP_C.S0 = res.readUInt8(0);
        res = res.slice(1);
    }

    if(!RTMP_C.S1 && res.length>=1536){
        RTMP_C.time = res.readUInt32BE(0);
        RTMP_C.random = res.slice(8,1536);
        RTMP_C.S1 = true;
        res = res.slice(1536);
        console.log('send C2');
        Client.write(RTMP_C.C2);
    }

    if(!RTMP_C.S2 && res.length >= 1536){
        RTMP_C.S2 = true;
        res = res.slice(1536);
    }
})

class C {
    constructor() {
        this.time;
        this.random;
    }
    C0() {
        let buf = Buffer.alloc(1);
        buf[0] = 3;
        return buf;
    }
    C1() {
    	let buf = Buffer.alloc(1536);
    	return buf;
    }
    /**
     * write C2 package
     * @param {Number} time the 4B Number of time
     * @param {Buffer} random 1528 byte
     */
    produceC2(){
    	let buf = Buffer.alloc(1536);
    	// leave empty value as origin time
    	buf.writeUInt32BE(this.time, 4);
    	this.random.copy(buf,8,0,1528);

    	return buf;
    }
    get getC01(){
    	return Buffer.concat([this.C0(),this.C1()]);
    }
    get C2(){

        return this.produceC2();
    }
}
const RTMP_C = new C();