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2.10 WebClient: Talking to Web Servers Interactively

53

Listing 2.12 WebClient.java (continued)

  private LabeledTextField hostField, portField,

          requestLineField;

  private TextArea requestHeadersArea, resultArea;

  private String host, requestLine;

  private int port;

  private String[] requestHeaders = new String[30];

  private Button submitButton, interruptButton;

  private boolean isInterrupted = false;

  public WebClient(String title) {

    super(title);

    setBackground(Color.lightGray);

    setLayout(new BorderLayout(5, 30));

    int fontSize = 14;

    Font labelFont =

      new Font("Serif", Font.BOLD, fontSize);

    Font headingFont =

      new Font("SansSerif", Font.BOLD, fontSize+4);

    Font textFont =

      new Font("Monospaced", Font.BOLD, fontSize 2);

    Panel inputPanel = new Panel();

    inputPanel.setLayout(new BorderLayout());

    Panel labelPanel = new Panel();

    labelPanel.setLayout(new GridLayout(4,1));

    hostField = new LabeledTextField("Host:", labelFont,

                                     30, textFont);

    portField = new LabeledTextField("Port:", labelFont,

                                     "80", 5, textFont);

    // Use HTTP 1.0 for compatibility with the most servers.

    // If you switch this to 1.1, you *must* supply a

    // Host: request header.

    requestLineField =

      new LabeledTextField("Request Line:", labelFont,

                           "GET / HTTP/1.0", 50, textFont);

    labelPanel.add(hostField);

    labelPanel.add(portField);

    labelPanel.add(requestLineField);

    Label requestHeadersLabel =

      new Label("Request Headers:");

    requestHeadersLabel.setFont(labelFont);

    labelPanel.add(requestHeadersLabel);

    inputPanel.add(labelPanel, BorderLayout.NORTH);

    requestHeadersArea = new TextArea(5, 80);

    requestHeadersArea.setFont(textFont);

    inputPanel.add(requestHeadersArea, BorderLayout.CENTER);

    Panel buttonPanel = new Panel();

    submitButton = new Button("Submit Request");

    submitButton.addActionListener(this);

    submitButton.setFont(labelFont);

    buttonPanel.add(submitButton);

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