node.js and socket.io: How can I get a specific query string?

This is my nodejs-server-code:

io.sockets.on('connection', function(socket) {
    var parts = require('url').parse(socket.handshake.url,true).query;

    console.log('url: ' + parts);

Console prints [object Object]. If I JSON.stringify(parts) I get the data, but how can I get the value of a specific query-string like id?

Also why do I just got a url result like this from socket.io and not the one from my localhost page? /http://ift.tt/1EVC1b3