Re: applet communic with servlet
viju <[email protected]>
| Newsgroups | gmane.comp.java.sun.servlet |
|---|---|
| Message-ID | <003401c2dee0$9d657db0$6d00a8c0@viju> |
response.setContentType("text/html");
will work for both conditions...
Vj
----- Original Message -----
From: "Jean-Baptiste Noël" <[email protected]>
To: <[email protected]>
Sent: Thursday,February 27,2003 9:16 PM
Subject: applet communic with servlet
> Hello,
> I include/understand or comes the error but I do not know how resolve
> the problem.
> I have applet which commnunic with a servlet. The applet sends
> a "string" to the servlet. The servlet receive the "string" and
> compares it with another. If it is not good, then the servlet re-send
> a "stringError".
> If not the servlet returns a page HTML.
> It is here that is the problem when the servlet returns page HTML I
> have the error "java.io.StreamCorruptedException: Does InputStream
> does not contain have serialized object" .
> How to make so that the applet manages the two types of objects which
> it receives? Is this possible?
> The code of the servlet and the applet below.
> Thank you very much.
>
> //My Applet :
> public class EchoApplet extends Applet {
> ...
> ...
> sendButton.addActionListener(new ActionListener() {
> public void actionPerformed(ActionEvent e) {
> onSendData();
> }
> }
> /**
> * Get a connection to the servlet.
> */
> private URLConnection getServletConnection()
> throws MalformedURLException, IOException {
> URL urlServlet = new URL(getCodeBase(), "echo");
> URLConnection con = urlServlet.openConnection();
> con.setDoInput(true);
> con.setDoOutput(true);
> con.setUseCaches(false);
> con.setRequestProperty("Content-Type",
> "application/x-java-serialized-object");
> return con;
> }
>
> /**
> * Send the inputField data to the servlet and show the result in the
> outputField.*/
> private void onSendData() {
> try {
> String log = login.getText();
> // send data to the servlet
> URLConnection con = getServletConnection();
> OutputStream outstream = con.getOutputStream();
> ObjectOutputStream oos = new ObjectOutputStream(outstream);
> oos.writeObject(log);
> oos.flush();
> oos.close();
>
> // receive result from servlet
> InputStream instr = con.getInputStream();
> ObjectInputStream inputFromServlet = new ObjectInputStream
> (instr);
> String result = (String) inputFromServlet.readObject();
> inputFromServlet.close();
> instr.close();
> // show result
> outputField.setText(result);
>
> } catch (Exception ex) {
> ex.printStackTrace();
> exceptionArea.setText(ex.toString());
> }
> }
> }
>
>
> //MY servlet
> public class EchoServlet extends HttpServlet {
> public void doPost(HttpServletRequest request,HttpServletResponse
> response)
> throws ServletException, IOException {
> try {
> InputStream in = request.getInputStream();
> ObjectInputStream inputFromApplet = new ObjectInputStream(in);
> String echo = (String)inputFromApplet.readObject();
> String resultToApplet;
> if (!(echo.equals("ok"))
> {
> response.setContentType("application/x-java-serialized-object");
> resultToApplet = "Error login or password";
> // echo it to the applet
> OutputStream outstr = response.getOutputStream();
> ObjectOutputStream oos = new ObjectOutputStream(outstr);
> oos.writeObject(resultToApplet);
> oos.flush();
> oos.close();
> }
>
> else
> {
> //my new html page
> response.setContentType("text/html; charset=ISO-8859-1");
> PrintWriter out = response.getWriter();
> out.print("<html><head></head><h1>OK</h1></html>");
> }
> } catch (Exception e) {
> e.printStackTrace();
> }
> }
> }
>
>
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