If you use the 1.2 Java plugin for your applet, then be warned that session
tracking via cookies will fail. You will need to pass the session id
manually, and URL rewriting may not work either unless you disable cookie
support on your servlet engine.
I've spent a lot of head banging on this one - let me know if you need any
more info.
Dave
> -----Original Message-----
> From: SUBHAPRATHA SRIDHARAN [SMTP:[EMAIL PROTECTED]]
> Sent: Thursday, May 25, 2000 2:51 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Applet-Servlet communication
>
> Hi,
>
> What exception do you get? Is that a Security exception?
> Browsers does not support JDK1.2. They need Plug-in.
>
> Regards.
>
>
>
> >From: Shaila C D <[EMAIL PROTECTED]>
> >Reply-To: "A mailing list for discussion about Sun Microsystem's Java
> > Servlet API Technology." <[EMAIL PROTECTED]>
> >To: [EMAIL PROTECTED]
> >Subject: Applet-Servlet communication
> >Date: Thu, 25 May 2000 14:45:35 +0530
> >
> >Hi,
> >
> > I am facing a problem with the communication between an Applet and a
> >Servlet. This code works fine if the applet is run from an appletviewer,
> >however, the applet does not fetch the same result when it is run on the
> >browser. Instead, it throws an exception. The code is attached below. The
> >whole exercise is to get the time from the server. I am using JSDK2.0,
> >JDK1.2 and servletrunner to load the servlet.
> >Let me know if I am missing anything
> >
> >Thanks.
> >
> >Applet Code
> >--------------------
> >
> >import java.applet.Applet;
> >import java.net.*;
> >import java.io.*;
> >import java.io.Reader.*;
> >import java.awt.*;
> >
> >public class client extends Applet {
> >
> > URL url = null;
> > public void init() {
> > try {
> > url = new URL("http://localhost:8080/servlet/survey");
> > }catch(MalformedURLException e) {
> > System.out.println("exception URL");
> > }
> > }
> >
> > public void start() {
> > repaint();
> > }
> >
> > public void paint(Graphics g) {
> > g.drawString(getDate(),50,50);
> > }
> >
> > public String getDate() {
> > try {
> > URLConnection con = url.openConnection();
> > con.setDoInput(true);
> > con.setDoOutput(true);
> > con.setUseCaches(false);
> > InputStream in = con.getInputStream();
> > BufferedReader dis = new BufferedReader(new InputStreamReader(in));
> > String date = dis.readLine();
> > in.close();
> > return date;
> > }catch(Exception e) {
> > System.out.println("exception");
> > return null;
> > }
> > }
> >}
> >
> >Servlet code
> >-------------------
> >import java.util.*;
> >import javax.servlet.http.*;
> >import javax.servlet.*;
> >import java.io.*;
> >
> >public class SurveyServlet extends HttpServlet {
> > public void init(ServletConfig config) throws ServletException {
> > super.init(config);
> > }
> >
> > public void doGet(HttpServletRequest req, HttpServletResponse res) {
> > res.setContentType("text/html");
> > try {
> > PrintWriter toClient = res.getWriter();
> > toClient.println(new Date().toString());
> > }catch(IOException e) {
> > System.out.println("exception");
> > }
> > }
> >}
> >
> >HTML
> >-----------
> ><html>
> ><body>
> ><applet code=client height=200 width=300> </applet>
> ></body>
> ></html>
> >
> >Servlet.properties
> >------------------------------
> >servlet.survey.code=SurveyServlet
> >
> >_________________________________________________________________________
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