Started Playing with node.js. I have a question

I just created a HTTP server using this code fro the documentation:

var sys = require("sys"),
    http = require("http");

http.createServer(function(request, response) {
    response.writeHead(200, {"Content-Type": "text/plain"});
    response.end("Hello World!");
    sys.puts('Connection');
}).listen(8080);

sys.puts("Server running at http://localhost:8080/");**

开发者_如何学Go

My question is, why when I go to localhost:8080 I got "connection" printed twice? is this a bug?

---

Your browser may be requesting the URL twice, once with a HEAD request and once with a GET request. Try using a simple interface, like telnet:

$ telnet localhost 8080
GET / HTTP/1.0

^]q

Leave a blank line after GET, and press Ctrl+]qEnter to get out.

---

two requests are sent to the server. The first request is automatically made by the browser, which requests favicon.ico, and of course, the second request is for the URL (localhost:8080).