HTTPClient.java

package com.ambientideas.encryption;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;

import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;

/*
 * This example demostrates how to use a SSLSocket as client to
 * send a HTTP request and get response from an HTTPS server.
 * It assumes that the client is not behind a firewall
 */
public class HTTPClient {

	public static void main(String[] args) throws Exception {
		try {
			SSLSocketFactory factory =
				(SSLSocketFactory)SSLSocketFactory.getDefault();
			SSLSocket socket =
				(SSLSocket)factory.createSocket("localhost", 2001);

			/*
			 * send http request
			 *
			 * Before any application data is sent or received, the
			 * SSL socket will do SSL handshaking first to set up
			 * the security attributes.
			 *
			 * SSL handshaking can be initiated by either flushing data
			 * down the pipe, or by starting the handshaking by hand.
			 *
			 * Handshaking is started manually in this example because
			 * PrintWriter catches all IOExceptions (including
			 * SSLExceptions), sets an internal error flag, and then
			 * returns without rethrowing the exception.
			 *
			 * Unfortunately, this means any error messages are lost,
			 * which caused lots of confusion for others using this
			 * code.  The only way to tell there was an error is to call
			 * PrintWriter.checkError().
			 */
			socket.startHandshake();

			PrintWriter out = new PrintWriter(
					new BufferedWriter(
							new OutputStreamWriter(
									socket.getOutputStream())));

			String filepath = "/samplemessage.txt";
			out.println("GET "+ filepath + " HTTP/1.0");
			out.println("");
			out.flush();

			/*
			 * Make sure there were no surprises
			 */
			if (out.checkError())
				System.out.println(
				"SSLSocketClient:  java.io.PrintWriter error");

			/* read response */
			BufferedReader in = new BufferedReader(
					new InputStreamReader(
							socket.getInputStream()));

			String inputLine;
			while ((inputLine = in.readLine()) != null)
				System.out.println(inputLine);

			in.close();
			out.close();
			socket.close();

		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}