virtual-host

Create virtual, self-contained connect or express applications using a very simple API.

Install

Use npm

$ npm install virtual-host --save

Require

var vhost = require('virtual-host')(express);

You can also require it with connect, if you are not using express.

API

#vhost(hostname)

Creates an instance of express (or connect), and a middleware you can .use in your main application.

You can provide a hostname, which defaults to '*', to further restrict the hostnames the virtual server will be used on. hostname is used to build a regular expression to test against req.headers.host, after stripping out the port. Stars '*' will be converted to (.*). You can use any characters in this set: [A-z_0-9.*-].

You can also just use a RegExp object as a hostname directly.

Example hostnames:

vhost('*')                // results in /^(.*)$/
vhost('*.foo.com')        // results in /^(.*)\.foo\.com$/i
vhost('www.*.com')        // results in /^www\.(.*)\.com$/i
vhost(/^www\.foo\.com$/i) // results in /^www\.foo\.com$/i

#vhost(hostname).off

Turns off the middleware, it will automatically .next all future requests.

var express = require('express');
var vhost = require('virtual-host')(express);
var www = vhost('www.*');
 
// configure www
 
app.use(www);
 
somethingBadHappens(function(){
    www.off(); // disable www
});

#vhost(hostname).on

Turns on the middleware, it will start handling requests once again.

var express = require('express');
var vhost = require('virtual-host')(express);
var www = vhost('www.*');
 
// configure www
 
app.use(www);
 
somethingGoodHappens(function(){
    www.on(); // re-enable www
});

#vhost(hostname).server

Exposes the express or connect instance used by this vhost.

Usage

var express = require('express');
var vhost = require('virtual-host')(express);
var app = express();
var www = vhost('www.*');
 
www.use(function(req,res,next){
    console.log(req.url);
 
    if(req.url === '/off'){
        www.off();
        res.send(500);
    }else{
        res.send(200);
    }    
});
 
app.use(www);