Thunderflurry Virtual Host

Middleware for express or connect to create virtual, self-contained application nodes in ThunderFlurry. Based originally on virtual-host, overhauled to add features specifically needed for ThunderFlurry's core.

Install

$ npm install thunderflurry-virtualhost --save

Requre

var host = require('thunderflurry-virtualhost')(express);

Or ES7

import virtualhost from 'thunderflurry-virtualhost';
const host = virtualhost(express);

API

vhost(hostname)

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

You must provide a hostname to 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-zA-Z_0-9.*-]. You may also provide an array of hostnames to hostname.

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$/i
vhost(['www.*', 'test.*'] // results in /^www\.(.*)$/i AND /^test\.(.*)$/i

Special case: The tile ~ is a special case that will match localhost and the root domain. Example:

vhost('~')                // matches localhost and example.com
vhost(['www.*', '~'])     // matches localhost and example.com and www.example.com

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);

vhost(hostname).handlesRoot

Returns true if ~ was used as a hostname and false if it wasn't included.

Usage

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

if (www.handlesRoot) {
   console.log('Tilde was used');
}

vhost(hostname).hosts

Returns the array of hosts the adapter is handling.

Usage

var express = require('express');
var vhost = require('virtual-host')(express);
var app = express();
var www = vhost(['~', 'www.*']);

www.forEach(function (item) {
  console.log(item);
}