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58

Chapter 2 First Servlets

Listing 2.14 NetworkClient.java (continued)

  /** Establishes the connection, then passes the socket

   *  to handleConnection.

   *

   * @see #handleConnection

   */

  public void connect() {

    try {

      Socket client = new Socket(host, port);

      handleConnection(client);

    } catch(UnknownHostException uhe) {

      System.out.println("Unknown host: " + host);

      uhe.printStackTrace();

    } catch(IOException ioe) {

      System.out.println("IOException: " + ioe);

      ioe.printStackTrace();

    }

  }

  /** This is the method you will override when

   *  making a network client for your task.

   *  The default version sends a single line

   *  ("Generic Network Client") to the server,

   *  reads one line of response, prints it, then exits.

   */

  protected void handleConnection(Socket client)

      throws IOException {

    PrintWriter out =

      SocketUtil.getWriter(client);

    BufferedReader in =

      SocketUtil.getReader(client);

    out.println("Generic Network Client");

    System.out.println

      ("Generic Network Client:\n" +

       "Made connection to " + host +

       " and got '" + in.readLine() + "' in response");

    client.close();

  }

  /** The hostname of the server we're contacting. */

  public String getHost() {

    return(host);

  }

  /** The port connection will be made on. */

  public int getPort() {

    return(port);

  }

}

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