Solved.. I forgot to extend the Class TunnelTest with the HttpServlet extension.
SS -----Original Message----- From: Stuart Stephen [mailto:[EMAIL PROTECTED]] Sent: 15 May 2002 11:56 To: Tomcat Users List Subject: HTTP Tunnelling problem?? Please help Hello all, I'm having problems trying to write a HttpTunnel for java objects in Tomcat. For some reason I'm getting a ClassCastException. I don't understand this. I've even tried forcing it as you can see in my code below. The exception that i'm getting is not very clear and i can't put my finger on it. I have attached the exception from Apache/Tomcat and the code for the tunnel at the bottom of this email. If you can help I would be very grateful. Regards, Stuart Stephen ---------------------------------------------------------------------------- ---- Apache Tomcat/4.0.1 - HTTP Status 500 - Internal Server Error ---------------------------------------------------------------------------- ---- type Exception report message Internal Server Error description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request. exception java.lang.ClassCastException: TestTunnel at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:820) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:615) at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java :396) at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja va:243) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 66) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja va:201) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 66) at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2 46) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 64) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164 ) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 66) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve. java:170) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 64) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170 ) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 64) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 64) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java :163) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 66) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:371) at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:424) at java.lang.Thread.run(Unknown Source) ----------------------- import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.ServletException.*; import javax.servlet.UnavailableException.*; import java.lang.Exception.*; import java.io.*; import java.util.*; import java.net.*; public class TestTunnel extends Thread { // applet connections ObjectOutputStream objOut = null; ObjectInputStream objIn = null; // chatserver connections Socket socket = null; ObjectOutputStream sockObjOut = null; ObjectInputStream sockObjIn = null; ToApplet app = null; ToServer ser = null; protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException,IOException { try { // get data stream from applet System.err.println("start of servlet"); objIn = new ObjectInputStream(req.getInputStream()); objOut = new ObjectOutputStream(res.getOutputStream()); // create socket to chat server and the streams socket = new Socket("127.0.0.1", 3000); sockObjOut = new ObjectOutputStream(socket.getOutputStream()); sockObjIn = new ObjectInputStream(socket.getInputStream()); app = new ToApplet((TestTunnel)this); ser = new ToServer((TestTunnel)this); System.err.println("end of servlet"); } catch(Exception e) { e.printStackTrace(); } } public void destroy() { try { objIn.close(); objOut.close(); sockObjIn.close(); sockObjOut.close(); socket.close(); } catch(Exception e) { e.printStackTrace(); } } private class ToApplet extends Thread { TestTunnel parent = null; public ToApplet(TestTunnel parent) { try { this.parent = parent; this.start(); } catch(Exception e) { e.printStackTrace(); } } public void run() { try { Object obj = null; while((obj=parent.sockObjIn.readObject())!=null) { write(obj); } } catch(Exception e) { e.printStackTrace(); } } public void write(Object msg) { try { parent.objOut.writeObject(msg); parent.objOut.flush(); parent.objOut.reset(); } catch(Exception e) { e.printStackTrace(); } } } private class ToServer extends Thread { TestTunnel parent = null; public ToServer(TestTunnel parent) { try { this.parent = parent; this.start(); } catch(Exception e) { e.printStackTrace(); } } public void run() { try { Object obj = null; while((obj=parent.objIn.readObject())!=null) { write(obj); } } catch(Exception e) { e.printStackTrace(); } } public void write(Object msg) { try { parent.sockObjOut.writeObject(msg); parent.sockObjOut.flush(); parent.sockObjOut.reset(); } catch(Exception e) { e.printStackTrace(); } } } } -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>