How to change the http version number used when Java sends an http request?

Question

How to change the http version number used when Java sends an http request? How do I manually implement using http 1.1 or http 1.0?

Answer 1

Socket s = new Socket(InetAddress.getByName("stackoverflow.com"), 80);
PrintWriter pw = new PrintWriter(s.getOutputStream());
pw.println("GET / HTTP/1.1");
pw.println("Host: caiyongji.com");
pw.println("");
pw.flush();
BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));
String t;
while((t = br.readLine()) != null) System.out.println(t);
br.close();

Answer 2

It is not possible to use the HttpURLConnection that comes with Java. For details, please refer to:
http://bugs.java.com/bugdatab...

You can consider using Socket to send simple HTTP requests yourself, or use a third-party library. Take Apache HttpClient as an example:

HttpClient client = new DefaultHttpClient(); 
client.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_0);