agora-access-token/server/DemoServer.js

```shell npm i agora-access-token ```

//var fs = require('fs');
//var https = require('https');
var http = require('http');
var express = require('express');
var AgoraSignGenerator = require('./lib/AgoraSignGenerator');

var PORT = 8080;

// Fill the vendorkey and sign key given by Agora.io
var VENDOR_KEY = "xxxx";
var SIGN_KEY = "yyyy";

//var private_key = fs.readFileSync(__dirname + '/../../cert/xxx.com.key');
//var certificate = fs.readFileSync(__dirname + '/../../cert/xxx.com.crt');
//var credentials = {key: private_key, cert: certificate, passphrase: "password"};

var app = express();
app.disable('x-powered-by');
app.set('port', PORT);
app.use(express.favicon());
app.use(app.router);

var generateDynamicKey = function(req, resp) {
    var channelName = req.query.channelName;
    if (!channelName) {
        return resp.status(400).json({ 'error': 'channel name is required' }).send();
    }

    var ts = Math.round(new Date().getTime() / 1000);
    var rnd = Math.round(Math.random() * 100000000);
    var key = AgoraSignGenerator.generateDynamicKey('4c95c85a2c9849e1b4653c47f0ee415c', 'd75e69f2021c49cc9ac2e1894187000f', channelName, ts, rnd);

    resp.header("Access-Control-Allow-Origin", "*")
        //resp.header("Access-Control-Allow-Origin", "http://ip:port")
    return resp.json({ 'key': key }).send();
};

app.get('/dynamic_key', generateDynamicKey);


http.createServer(app).listen(app.get('port'), function() {
    console.log('AgoraSignServer starts at ' + app.get('port'));
});

//https.createServer(credentials, app).listen(app.get('port') + 1, function() {
//    console.log('AgoraSignServer starts at ' + (app.get('port') + 1));
//});