why do you have to
response.setContentType("application/x-java-serialized-object");
in the servlet, when you're going to be directly using the OutputStream to send an
object to the applet ?
I think your code will work pretty fine, if you remove this line from the servlet code.
regards
Pramod Nair
-----Original Message-----
From: Jean-Baptiste Noël [mailto:[EMAIL PROTECTED]
Sent: Thursday, February 27, 2003 9:16 PM
To: [EMAIL PROTECTED]
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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