Inconsistent Stream responses b/w servlet & applet

Question

Hi all,
I am facing problem with my servle/applet communication .I am using serialized object transport b/w the two. I am able to send my object using a URL connection class successfully to the server .
However having problems while reading the response on the applet .
It's been so incosistent that I sometimes think of switching over to some activex control instead of an applet .
I have been struggling with this one for quite sometime . Somebody help to fix this out!
First to the problem faced by me
Some times I get StreamCorruptedException saying Input stream does not contain serialized object .
Some times I get EOFException saying Invalid Header-1.
Why so much inconsistency when I am passing the same serialzed object CStreamData? Anyone's valueable input is highly appreciated.
My part of code that reads the object sent from the servlet.
public CStreamData ReadResObj(CServerRequest oRequest)
CStreamData objResponse = null;
isServerRunning = true;
try {
URL url = new URL( "http://localhost:8080"+
"/apps/servlet/MWServer");
URLConnection con = url.openConnection();
con.setUseCaches(false);
con.setRequestProperty("CONTENT_TYPE","application/octet-stream");
con.setDoInput(true);
con.setDoOutput(true);
ObjectOutputStream out = new ObjectOutputStream(con.getOutputStream());
out.writeObject(oRequest);
out.flush();
out.close();
ObjectInputStream ois = new ObjectInputStream(con.getInputStream());
//The exception is thrown here while reading...
objResponse = (CStreamData)ois.readObject();
ois.close();
}catch (Exception e)
isServerRunning = false;
return (CStreamData)objResponse;
return (CStreamData)objResponse;
}//End of readResObj
Best rgds,
prithvi

Answer 1

It would be interesting to see what's the response of your servlet.
Mybe the response of your servlet is an error html page
which of course can't be converted into Object of Type CStreamData.
You should think about doing some error handling before you try read from the ObjectInputStream an before you think about using ActiveX components.
for example
URLConnection con = url.openConnection();
HttpURLConnection httpConnection;
try
  URL url = new URL( "http://localhost:8080"+"/apps/servlet/MWServer");
  URLConnection con = url.openConnection();
  httpConnection = (HttpURLConnection)con;
  out.close();
  if(  httpConnection.getResposeCode() == HttpURLConnection.HTTP_OK )
     ObjectInputStream ois = new ObjectInputStream(con.getInputStream());
     objResponse = (CStreamData)ois.readObject();
     ois.close();
}If you still have problems dump the content of your servlet response
to the console and tell what you see or post parts of the response.