/* This program connects to a web server and gets infor from it.
 * It retrives the root page "/" if no other specifc page is given, 
 * or it retrives the specified 'dir' * page.
 * Apr-1998 X. Meng
 * sep-03-2002 X. Meng replace the DataInputStream with BufferedReader
 * nov-12-2002 X. Meng consider the cases where the content-length is not
 * returned by the server.
 */
import java.io.*;
import java.net.*;
import java.util.*;

class TcpHttpClient {
    public final static int PORT = 80;   // default web port
    public final static String CMD = "HEAD";

    public static void main(String[] args) throws IOException {
	Date d;
	long start, end;

        if (args.length != 1) {
	    System.out.println(" usage: java TcpHttpClient host");
	    System.exit(1);
	}

	Socket t   = new Socket(args[0].trim(), PORT); // create a socket
	String cmd = new String(CMD + " /");

	cmd += " HTTP/1.1\n";
	cmd += "Host: " + args[0].trim() + "\n";
	cmd += "\r\n\r\n";

	System.out.println("sending command :");
	System.out.print(cmd);

	// connecting to socket input and output
	BufferedReader is = new BufferedReader
	    (new InputStreamReader
	     (new DataInputStream(t.getInputStream())));

	PrintStream out = new PrintStream(t.getOutputStream());

	out.print(cmd);
	out.flush();

	String inBuffer = new String();

	inBuffer = readHttpHeader(is);

	System.out.println("header : " + inBuffer);

    }  // main

    public static String readHttpHeader(BufferedReader fileIn)    {

	String inBuffer = "";
	try {

	    String line;
	    do {
		line = fileIn.readLine();
		inBuffer += line + "\r\n";
		// System.out.print("in readAll -> " + line + "<-");
		if (line.length() == 2 && line.compareTo("\n\n") == 0) {
		    System.out.println("we hit the break in readAll");
		    break;
		}
	    } while (line.length() > 0);
	}
	catch (IOException ignored) {};
	return inBuffer;
    }

}