express 4.x 将 http 重定向到 https

Question

我有以下代码：

var https        = require('https');
var http         = require('http');
var express      = require('express');
var app          = express();
var router       = express.Router();

app.use('/', router);

//have 'server' listen for https
var server = https.createServer(config.sslCredential, app);
server.listen(config.serverPort);

//listen server on http, and always redirect to https
var httpServer = http.createServer(function(req,res){
    res.redirect(config.serverDomain+req.url);
});
httpServer.listen(config.httpServerPort);

但不知何故，我无法将 https 请求重定向到 https 请求，我应该如何在 node.js 上使用 express 4.x 正确执行此操作？

Answer 1

引用my own answer 的中间件解决方案（顺便说一句，在 express 3.0 上）

app.all('*', ensureSecure); // at top of routing calls

http.createServer(app).listen(80)
https.createServer(sslOptions, app).listen(443)

function ensureSecure(req, res, next){
  if(req.secure){
    // OK, continue
    return next();
  };
  // handle port numbers if you need non defaults
  // res.redirect('https://' + req.host + req.url); // express 3.x
  res.redirect('https://' + req.hostname + req.url); // express 4.x
}