vhost

virtual domain hosting

vhost

$ npm install vhost
var vhost = require('vhost')

Create a new middleware function to hand off request to handle when the incoming host for the request matches hostname. The function is called as handle(req, res, next), like a standard middleware.

hostname can be a string or a RegExp object. When hostname is a string it can contain * to match 1 or more characters in that section of the hostname. When hostname is a RegExp, it will be forced to case-insensitive (since hostnames are) and will be forced to match based on the start and end of the hostname.

When host is matched and the request is sent down to a vhost handler, the req.vhost property will be populated with an object. This object will have numeric properties corresponding to each wildcard (or capture group if RegExp object provided) and the hostname that was matched.

// for match of "foo.bar.example.com:8080" against "*.*.example.com": 
req.vhost.host === 'foo.bar.example.com:8080'
req.vhost.hostname === 'foo.bar.example.com'
req.vhost.length === 2
req.vhost[0] === 'foo'
req.vhost[1] === 'bar'
var connect = require('connect')
var serveStatic = require('serve-static')
var vhost = require('vhost')
 
var mailapp = connect()
 
// add middlewares to mailapp for mail.example.com 
 
// create app to serve static files on subdomain 
var staticapp = connect()
staticapp.use(serveStatic('public'))
 
// create main app 
var app = connect()
 
// add vhost routing to main app for mail 
app.use(vhost('mail.example.com', mailapp))
 
// route static assets for "assets-*" subdomain to get 
// around max host connections limit on browsers 
app.use(vhost('assets-*.example.com', staticapp))
 
// add middlewares and main usage to app 
 
app.listen(3000)
var connect = require('connect')
var serveStatic = require('serve-static')
var vhost = require('vhost')
 
var mainapp = connect()
 
// add middlewares to mainapp for the main web site 
 
// create app that will server user content from public/{username}/ 
var userapp = connect()
 
userapp.use(function(reqresnext){
  var username = req.vhost[0] // username is the "*" 
 
  // pretend request was for /{username}/* for file serving 
  req.originalUrl = req.url
  req.url = '/' + username + req.url
 
  next()
})
userapp.use(serveStatic('public'))
 
// create main app 
var app = connect()
 
// add vhost routing for main app 
app.use(vhost('userpages.local', mainapp))
app.use(vhost('www.userpages.local', mainapp))
 
// listen on all subdomains for user pages 
app.use(vhost('*.userpages.local', userapp))
 
app.listen(3000)
var connect = require('connect')
var http = require('http')
var vhost = require('vhost')
 
// create main app 
var app = connect()
 
app.use(vhost('mail.example.com', function (reqres) {
  // handle req + res belonging to mail.example.com 
  res.setHeader('Content-Type', 'text/plain')
  res.end('hello from mail!')
}))
 
// an external api server in any framework 
var httpServer = http.createServer(function (reqres) {
  res.setHeader('Content-Type', 'text/plain')
  res.end('hello from the api!')
})
 
app.use(vhost('api.example.com', function (reqres) {
  // handle req + res belonging to api.example.com 
  // pass the request to a standard Node.js HTTP server 
  httpServer.emit('request', req, res)
}))
 
app.listen(3000)

MIT