Proxies requests based on the url directory (e.g. /database, /articles, etc...). It is Similar to proxy-by-url, but works with http-proxy 1.0 api.
var server = require('http').createServer(require('proxy-by-directory')({
'/articles' : { target : 'http://localhost:5555/' },
'/' : { target : 'http://sethlakowske.com:7777' }
})).listen(8000)