Hi folks,
I have a problem doing a doPost on a servlet from an applet. I open a
URLConnection to the servlet and open an ObjectOutputStream to send
data which should be processed in the doPost Method of the servlet. I
also make a Reader to read the results of processing from the servlet.
However, somwthing is wron with the connection since the service method
of the servlet is not called and therefore also no doPost(). I enclose
the applet code so maybe someone may have a look at it and can find the
bug thats somwhere in there. I would be thankful for any hints!!
Markus
// establish connection to servlet and send the data
try{
// connect to servlet
URL servletURL = new URL("http://localhost/MyServlet");
URLConnection servletConnection = servletURL.openConnection();
// set connection to in/out
servletConnection.setDoInput(true);
servletConnection.setDoOutput(true);
// disable caching for URL connection
servletConnection.setUseCaches(false);
servletConnection.setDefaultUseCaches(false);
// specify content type
servletConnection.setRequestProperty("Content-Type",
"application/octet-stream");
// send the objects to the servlet using object serialization
ObjectOutputStream outputToServlet = null;
try{
outputToServlet = new
ObjectOutputStream(servletConnection.getOutputStream());
outputToServlet.writeObject(obj1);
outputToServlet.writeObject(obj2);
outputToServlet.writeObject(obj3);
outputToServlet.flush();
outputToServlet.close();
}
catch(IOException e){
System.out.println("error in writing to servlet: " + e.getMessage());
}
// read the input from the servlet
BufferedReader inputFromServlet = null;
try{
inputFromServlet = new BufferedReader(new
InputStreamReader(servletConnection.getInputStream()));
String str;
StringBuffer buf = new StringBuffer();
while((str = inputFromServlet.readLine()) != null){
buf.append(str);
}
inputFromServlet.close();
textArea.setText(buf.toString());
}
catch(IOException e){
System.out.println("error in reading from servlet: " + e.getMessage());
}
}
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