var http = require('http');
var https = require('https');

var httpPort = 3345;

var server = http.createServer(function(req, res){
 res.writeHead(200, {'Content-Type': 'text/plain'});
 res.end('hello world!');
}).listen(httpPort);

var https = require('https');
var fs = require('fs');

var httpsPort = 3346;

var options = {
 key: fs.readFileSync('./cakey.pem'),
 cert: fs.readFileSync('./cacert.pem')
};

var sserver = https.createServer(options, function(req, res){
 res.writeHead(200, {'Content-Type': 'text/plain'});
 res.end('secured hello world');
}).listen(httpsPort);

var net = require('net');
var http = require('http');
var https = require('https');
var fs = require('fs');

var httpPort = 3345;
var httpsPort = 3346;

var server = http.createServer(function(req, res){
 res.writeHead(200, {'Content-Type': 'text/plain'});
 res.end('hello world!');
}).listen(httpPort);

var options = {
 key: fs.readFileSync('./cakey.pem'),
 cert: fs.readFileSync('./cacert.pem')
};

var sserver = https.createServer(options, function(req, res){
 res.writeHead(200, {'Content-Type': 'text/plain'});
 res.end('secured hello world');
}).listen(httpsPort);

net.createServer(function(socket){
 socket.once('data', function(buf){
  console.log(buf[0]);
  // https数据流的第一位是十六进制“16”，转换成十进制就是22
  var address = buf[0] === 22 ? httpsPort : httpPort;
  //创建一个指向https或http服务器的链接
  var proxy = net.createConnection(address, function() {
   proxy.write(buf);
   //反向代理的过程，tcp接受的数据交给代理链接，代理链接服务器端返回数据交由socket返回给客户端
   socket.pipe(proxy).pipe(socket);
  });
  
  
  proxy.on('error', function(err) {
   console.log(err);
  });
 });
 
 socket.on('error', function(err) {
  console.log(err);
 });
}).listen(3344);