Tweets.js

var sys=require('sys'), http = require('http');
var query = "Winter Olympics";
var twitter = http.createClient(80, "search.twitter.com");
var since = 0;

function scanTweet() {
	
    // the httpclient "twitter" we created above - here we build a 
    // query to Twitter, requesting a JSON response. It's not 
    // fired off until we call the "finish" method on it.
    var tweetRequest = twitter.request("/search.json?q=" 
        + query + "&since_id="+since, 
	{"host": "search.twitter.com", 
         "User-Agent": "NodeJS HTTP Client"});
		
    // Note we pass in a callback to handle the response when it
    // comes back - after the request is fired processing continues, 
    // it doesn't wait for the response. Very similar to how you call
    // Ajax from a browser.
    tweetRequest.addListener("response", function(response) {
        var responseBody = "";
        response.setBodyEncoding("utf8");

        // the "body" event is fired as chunks come back in the 
        // response so streaming can be handled. 
        // Here we just collect it all up.
        response.addListener("body", 
        function(chunk) {
            responseBody += chunk;
        });

        // the "complete" event is fired once all body returned
        response.addListener("complete", 
        function() {
            tweets = JSON.parse(responseBody);
            var results = tweets["results"];
            var length = results.length;
            for (var i = (length-1); i >= 0; i--) {
                if (results[i].id > since) {
                  since = results[i].id;
                }
                sys.puts("@"+results[i].from_user
                    +": "+results[i].text);
            }
        });

    });

    // fire off the request above
    tweetRequest.finish();

    // call this every 10 seconds, then sleep
    setTimeout(gettweets, 10000);
}

// kick it all off
scanTweet();