import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

/*
 * This class demonstrates how to connect to a server on a port
 * through a socket, establish text-based input and output streams, 
 * and communicate by sending and receiving text-based data.
 */
public class NetTest
{
    // the host to connect to
    static String host = "sciris.shu.edu";
    // the port on which to connect
    static int port = 80;
    
    // standard program entry point
    public static void main(String[] args)
    {
        // The connection attempt must be embedded in a 'try-catch' block
        // to catch the many errors that could occur during communications
        try
        {
            // Connecting using the java.net.Socket class
            System.out.println("Connecting ...");
            Socket socket = new Socket(host, port);
            System.out.println("Connected: " + socket);
            
            // Setting up an output stream with text translation and buffering.
            // This output stream can then be used to send data to the host.
            OutputStream outstream = socket.getOutputStream();
            OutputStreamWriter writer = new OutputStreamWriter(outstream);
            PrintWriter out = new PrintWriter(writer);
            
            // Setting up an input stream with text translation and buffering.
            // This input stream can be used to receive data from the host.
            InputStream instream = socket.getInputStream();
            InputStreamReader reader = new InputStreamReader(instream);
            BufferedReader in = new BufferedReader(reader);

            // Now connection is established, IO is setup, we can now 'talk'

            // Sending an http 1.1 GET request to the host
            out.println("GET / HTTP/1.1");
            out.println("Host: " + host);
            out.println();
            // Data accumulates in stream buffer; must be 'flushed' to send
            out.flush();
            
            // GET request is sent, expecting an answer. We read the answer from 
            // the input stream line by line in a while loop, since we don't know
            // how many lines will come in. Each line is printed to standard out.
            String line = in.readLine();
            while (line != null)
            {
                System.out.println(line);
                line = in.readLine();
            }
            
            // Done, so closing streams and socket
            out.close();
            in.close();
            socket.close();
        }
        catch (UnknownHostException e)
        {
            // Printing error message for unknown host exception
            e.printStackTrace();
        }
        catch (IOException e)
        {
            // Printing error message for all other IO exceptions
            e.printStackTrace();
        }   
    }
}