Create a levelup multilevel server that proxies to a Riak bucket

riaklevelproxy.js

var levelup = require('levelup');
var multilevel = require('multilevel');
var net = require('net');
var util = require('util');

var argv = require('optimist')
    .default({host: 'localhost', port: 8087, listen: 8091})
    .usage('Usage: level2riak --host 127.0.0.1 --port 8087 --listen 8091 --bucket somebucket'
        + '\n\nlevel2riak uses the riak protocol buffer and pb port (default: 8087)'
        + '\nConnect with a multilevel client.')
    .demand(['bucket'])
    .alias('h', 'host')
    .alias('p', 'port')
    .alias('l', 'listen')
    .alias('b', 'bucket')
    .argv;

var riakuri = util.format("riak://%s:%d/%s", argv.host, argv.port, argv.bucket);

var db = levelup(
    riakuri,
    { db: require('riakdown'), valueEncoding: 'json'});

console.log("Connected to", riakuri);
console.log("Listening for multilevel connection on:", argv.listen);

net.createServer(function (con) {
    console.log("Recieved connection");
    con.pipe(multilevel.server(db)).pipe(con);
}).listen(argv.listen);