Second half of OpenTok NodeJS server

opentok-server-and-token.js

var express = require('express');
function start_server(){
  // Serve files for browser clients
  server.get('/', function(req, res){
    // Serve index file
    // ...
  });
  server.get('/:dir/:name', function(req, res, next){
    // Serve asset files
    // ...
  });
  
  // Send session id's stored in memory
  // when client requests it
  server.get('/quality.session.id', function(req, res){
    var response = {
      sessionId: QUALITY_SESSION_ID
    };
    
    res.type('json'); 
    res.send(JSON.stringify(response));
  });
  server.get('/session.id', function(req, res){
    var response = {
      sessionId: SESSION_ID
    };
    
    res.type('json'); 
    res.send(JSON.stringify(response));
  });
  
  // When client requests token,
  // generate token and send it
  server.get('/quality.token', function(req, res){
    var token = opentok.generateToken(QUALITY_SESSION_ID);
    
    var response = {
      token: token
    };
    
    res.type('json'); 
    res.send(JSON.stringify(response));
  });
  server.get('/token', function(req, res){
    var token = opentok.generateToken(SESSION_ID);
    
    var response = {
      token: token
    };
    
    res.type('json'); 
    res.send(JSON.stringify(response));
  });

  server.listen(process.env.PORT || 3000);
}