I would recommend you to user request for something like this:
var request = require('request'); // npm install request
request('http://www.google.com').pipe(process.stdout);
Looking at restify's docs it seems you need to wait for the 'result' event:
var client = restify.createClient({
url: "http://www.google.com"
});
client.get("/", function(err,req) {
req.on('result',function(err2,res) {
res.pipe(process.stdout);
res.on('end',function() {
process.exit(0);
});
});
});