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2.10 WebClient: Talking to Web Servers Interactively

Listing 2.12 WebClient.java (continued)

    String portString =

      portField.getTextField().getText();

    if (portString.length() == 0) {

      report("Missing port number");

      return(false);

    try {

      port = Integer.parseInt(portString);

    } catch(NumberFormatException nfe) {

      report("Illegal port number: " + portString);

      return(false);

    requestLine =

      requestLineField.getTextField().getText();

    if (requestLine.length() == 0) {

      report("Missing request line");

      return(false);

    getRequestHeaders();

    return(true);

  private void report(String s) {

    resultArea.setText(s);

  private void getRequestHeaders() {

    for(int i=0; i

      requestHeaders[i] = null;

    int headerNum = 0;

    String header =

      requestHeadersArea.getText();

    StringTokenizer tok =

      new StringTokenizer(header, "\r\n");

    while (tok.hasMoreTokens())

      requestHeaders[headerNum++] = tok.nextToken();

HttpClient

The

HttpClient

 class does the real network communication. It simply sends

the designated request line and request headers to the Web server, then

reads the lines that come back one at a time, placing them into a

TextArea

until either the server closes the connection or the

HttpClient

 is inter

rupted by means of the

isInterrupted

 flag.

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