import java.net.*;
import java.io.*;
import java.util.Vector;
import java.util.Date;
import java.util.StringTokenizer;

public class MyServer extends Thread
{
  private ServerSocket listener = null;
  private int port = MySocket.DEFAULT_PORT;

  /** Start the server.*/
  public static void main(String args[])
  {
    new MyServer().start();
  }

  /** Run the server.*/
  public void run()
  {
    try
    {
      listener = new ServerSocket(port);
    }
    catch(IOException e)
    {
      System.err.println(e); System.exit(1);
    }

    System.out.println("Listening on "+listener);

    while (true)
    {
      try
      {
        Socket connection = listener.accept();

        MyConnectionHandler handler =
          new MyConnectionHandler(connection);
        handler.start();
      }
      catch(IOException e)
      {
        System.err.println("Exception:" + e);
      }
    }
  }
}


/** Handles a request from a client.*/
class MyConnectionHandler extends MySocket
{
  MyConnectionHandler(Socket socket)
  {
    super(socket);
  }

  /** Load a file from the filesystem.*/
  public String load_from_file(String filename)
  {
    try
    {
      return load(
        new BufferedReader(
          new FileReader(
            new File(filename))));
    }
    catch(FileNotFoundException file_not_found_exception)
    {
      System.err.println(filename+" read error:"
        +file_not_found_exception+"!");

      //file_not_found_exception.printStackTrace();
    }

    return null;
  }

  /** Handle the request. */
  public void run()
  {
    try
    {
      String request= receiveLine();
      System.out.println("Request for " + request +".");

      StringTokenizer tokenizer = new StringTokenizer(request);

      if (tokenizer.nextToken().equalsIgnoreCase("GET")
        &&tokenizer.hasMoreElements())
      {
        String name = System.getProperty("user.dir")+
          tokenizer.nextToken();
        String data = load_from_file(name);

        if (data!=null)
        {
          send ("HTTP/1.0 200 OK\015\012");
          send ("Connection: Keep-Alive\015\012");
          send ("Date: "+ new Date()+"\015\012");
          send ("Server: JCT's Server 1.0\015\012");
          send ("Content-Encoding: ASCII\015\012");
          send ("Content-Length: " + data.length()+"\015\012");

          if (name.endsWith(".class"))
            send ("Content-Type: application/class\015\012");
          else if (name.endsWith(".gif"))
            send ("Content-Type: image/gif\015\012");
          else
            send ("Content-Type: text/html\015\012");
          send ("\015\012");
          send (data);
          send ("\015\012");
        }
        else
          send ("HTTP/1.0 404 Not Found\015\012");
      }
      else
        send("No Service");

      socket.close();
    }
    catch (IOException e )
    {
      e.printStackTrace();
    }

    System.out.println("Disconnecting: "
      + socket.getInetAddress() +":"
      + socket.getPort());
    stop();
  }
}