Error Unexpected end of file from server with HTTP POST

Question

Hi everyone,
I'm coding a simple client to download some information from a local machine in my LAN.
I have to do this with an http post request.
When i try to parse the http response the program catch an exception, this one:
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(...)
the parameter is a JSON request, and of course the response is a JSON formatted.
i put the http request code:
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpDownloaderThread  extends Thread{
     private String url;
        private String param;
     private HttpDownloadListener listener;
     private HttpURLConnection connection=null;
     private InputStream is;
        private OutputStreamWriter wr;
     public HttpDownloaderThread(String _url,String param, HttpDownloadListener _listener){
          url = _url;
          listener = _listener;
                this.param=param;
     public void run(){
          try{
               connection=(HttpURLConnection)new URL(url).openConnection();
                        connection.setRequestMethod("POST");
                        connection.setReadTimeout(5000);
                        connection.setRequestProperty("Content-Type", "application/jsonrequest");
                        connection.setDoOutput(true);
                        wr = new OutputStreamWriter(connection.getOutputStream());
                        wr.write(param, 0, param.length());
                        wr.flush();
                        int responseCode=0;
               System.out.println();
                        try{
                         responseCode= connection.getResponseCode();
                        }catch(Exception e){
                            e.printStackTrace();
               if (responseCode == HttpURLConnection.HTTP_OK){
                    is = connection.getInputStream();
                                 BufferedReader rd = new BufferedReader(new InputStreamReader(is));
                                String line;
                                while ((line = rd.readLine()) != null) {
                                    System.out.println(line);
                    closeHttpConnection();
                    listener.resourceDownloaded(url, null);
                            else{
                            closeHttpConnection();
                            listener.downloadFailed(url, new Exception("Http error: " + Integer.toString(responseCode)));
          }catch(Exception e){
               e.printStackTrace();
               listener.downloadFailed(url, e);
          }finally{
     public void closeHttpConnection(){
          if (is != null){
               try{
                    is.close();
                                wr.close();
               }catch (Exception e){
               }finally{
                    is = null;
                                wr=null;
          if (connection != null){
               try{
                    connection.disconnect();
               }catch (Exception e){
               }finally{
                    connection = null;
}there's someone who know's why??
Thanks to everyone :)
Thomas.

Answer 1

jole_star wrote:
this problem also happen to me,.So since you provided actually no information about your problem you are going to get exactly the same response.
Please don't hijack old threads. Start your own and provide much much much more information.
I shall lock this thread.