使用Node.js和Express将非www重定向到www

Question

I am serving a static directory like so:

var app = express.createServer();
app.configure(function(){
    app.use(express.static(__dirname + '/public'));
});

So I am not using routes at all. I would like to redirect example.com to www.example.com, is this possible using Express?

Answer 1

The following code preserve path while redirecting

Ex: http://foo.com/foo to http://www.foo.com/foo

    var app = express.createServer();
    self.app.all(/.*/, function(req, res, next) {
      var host = req.header("host");
      if (host.match(/^www\..*/i)) {
        next();
      } else {
        res.redirect(301, "http://www." + host + req.url);
      }
    });
    app.use('/',express.static('public'));

Answer 2

Yes. This should do it.

var express = require("express");
var app = express.createServer();
var port = 9090;
app.all(/.*/, function(req, res, next) {
  var host = req.header("host");
  if (host.match(/^www\..*/i)) {
    next();
  } else {
    res.redirect(301, "http://www." + host);
  }
});
app.use(express.static(__dirname + "/public"));
app.listen(port);

Answer 3

Alternatively, you can use a ready-made module for Express that does exactly what you want, eg node-force-domain.

See https://github.com/goloroden/node-force-domain for details.

Answer 4

You can use express-force-domain package from npm:

//install
npm install express-force-domain

///app.js
app.all('*', require('./express-force-domain')('http://www.example.com') );

Package on npm: https://npmjs.org/package/express-force-domain