HttpURLConnection : Can you tell me what's wrong here ?

Question

Hi,
here are to bloks of code, one for a client side, the second one for the server side.
The client is a simple app sending a request to a servlet
The second one is the servlet.
Before inserting the code, I describe my problem :
The client send a http request, get the response from the servlet and display the response.
The servlet get the content of the http request and send it back to the client.
Client side :
import java.net.*;
import java.io.*;
public class CallingServlet1
public static void main(String[] args)
String myUrl = "http://localhost:8080/myApp/servlet/UploadServlet";
try
URL url = new URL (myUrl);
HttpURLConnection cxn = (HttpURLConnection)url.openConnection();
cxn.setRequestMethod("POST");
cxn.setUseCaches(false);
cxn.setDoOutput(true);
cxn.setDoInput(true);
ByteArrayOutputStream bytes = new
ByteArrayOutputStream(400);
PrintWriter writer = new PrintWriter (bytes,true);
writer.print("my content.");
writer.flush();
cxn.setRequestProperty("Content-Length",String.valueOf(bytes.size()));
cxn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
bytes.writeTo( cxn.getOutputStream() );
String currentLine;
BufferedReader in = new BufferedReader (new InputStreamReader(cxn.getInputStream(),"8859_1"));
while((currentLine = in.readLine()) != null) {
System.out.println(currentLine);
catch(Exception e) { e.printStackTrace(); }
Server side :
import java.io.*;
import java.util.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class UploadServlet extends HttpServlet
static final String dir="C:/temp";
public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException
ServletOutputStream output = res.getOutputStream();
int content_length = req.getContentLength();
output.println("ContentLength: " + content_length + "<BR>");
if(content_length > 0) {
InputStream input;
input = req.getInputStream();
BufferedInputStream in = new BufferedInputStream(input);
BufferedReader reader = new BufferedReader( new InputStreamReader(in) );
for ( int j=0; j<content_length; j++ )
int i = reader.read();
output.println( String.valueOf(i) );
in.close();
So now, no problem with the previous code.
The problem is that if in the server side, instead of the code
for ( int j=0; j<content_length; j++ )
int i = reader.read();
output.println( String.valueOf(i) );
I put a
while ((i = reader.read()) != -1)
output.println( String.valueOf(i) );
the program doesn't stop and, after this first step, I have to replace the while by giving the content to a xmlParser that will not work in this situation
Please, help.

Answer 1

I think that my problem is I don't know how to say that the content has been fully sent to the server and then pass in a wait mode for the response so that the servlet will receive something like a (eof) instead of stay waiting for others elements.