node-restify before hook to serve different version of routes based on query string

node-restify-version-qs.js

var qs = require( "querystring" );

server.pre(function( req, res, next ){
	var query = qs.parse( req.query() );
	
	req._version = query.version||undefined; //if `version` isn't defined, let node-restify to decide which is the best version

	next();
});