import java.io.*;
import java.net.*;
import java.util.*;
import java.util.logging.*;


/**
 * Handle an HTTP 1.0 connection in a new thread of execution
 *
 * This version:
 *
 *    Handles all requests using servlets
 *
 * @author  Prof. David Bernstein, James Madison University
 * @version 0.3
 */
public class HttpConnectionHandler implements Runnable
{
    private HttpInputStream     in;
    private HttpOutputStream    out;
    private Logger              logger;    
    private Socket              socket;


    /**
     * Explicit Value Constructor
     * (Starts the thread of execution)
     *
     * @param s    The TCP socket for the connection
     */
    public HttpConnectionHandler(Socket s)
    {
       // Setup the logging system
       logger     = Logger.getLogger("edu.jmu.cs");

       socket = s;
    }


    /**
     * The entry point for the thread
     */
    public void run()
    {
       HttpServlet            servlet;
       HttpServletFactory     factory;
       HttpRequest            request;
       HttpResponse           response;
       InputStream            is;
       OutputStream           os;

       try 
       {
          // Get the I/O streams for the socket
          is = socket.getInputStream();
          os = socket.getOutputStream();

          in  = new HttpInputStream(is);
          out = new HttpOutputStream(os);          

          // Create an empty request and response
          request = new HttpRequest();
          response = new HttpResponse();

          try
          {
             // Read and parse the request information
             request.read(in);

             // Log the request for debugging purposes
             logger.log(Level.CONFIG, request.toString());

             // Process the request
             factory = HttpServletFactory.createFactory();
             servlet = factory.createServlet(request, in, out);
             servlet.service(request, response);
          }
          catch (Exception e)
          {
             response.sendError(HttpResponse.SC_BAD_REQUEST, out);
          }
       } 
       catch (IOException ioe)
       {
          // I/O problem so terminate the thread.
          // The server should close the socket.
       }
    }
}