How to view file on server.

Question

Hello
I am developing a small client server application.Clients post comments about the application and these are stored in a file on the server.Its a standalone app.My question is if a client wants to view the file on server,how can i do that??
Any help/suggestions will be appreciated.
thanks
Sree.

Answer 1

I tried doing that but i get an exception
java.net.SocketException: Software caused connection abort: socket write error .
by google i found that this was due to a bug but has been fixed on JRE 1.5(i'm using JRE 1.6) but i still get this.
here is my code:package com;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.MalformedURLException;
import java.net.ServerSocket;
import java.net.Socket;
public class TestServer_New
     public static void main(String args[])
          ServerSocket server = null;
          boolean listening = true;
          final String filename = "comments";
          try {
               server = new ServerSocket(4321);
          catch (MalformedURLException e1) {
               e1.printStackTrace();
          catch (IOException e) {
               System.out.println("Error on port: 4321 " + ", " + e);
               System.exit(1);
          System.out.println("Server setup and waiting for client connection ...");
          try
               while( listening ) {
                    final Socket client_socket = server.accept();
                    System.out.println("Client connection accepted. Moving to local port ...");
                    new Thread( new Runnable() {
                         public void run() {
                              write_to_comments(client_socket, filename);
                         }}).start();
               server.close();
          catch (IOException e)
               System.out.println("Did not accept connection: " + e);
               System.exit(1);
     static synchronized void  write_to_comments(Socket client_socket , String filename) {
          try {
               BufferedReader streamIn = new BufferedReader(new InputStreamReader(client_socket.getInputStream()));
               BufferedReader file_reader = new BufferedReader(new InputStreamReader(new FileInputStream(filename)));
               BufferedWriter server_file_writer = new BufferedWriter(new FileWriter(filename,true));
               BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(client_socket.getOutputStream()));
               String line ;
//               while((line = streamIn.readLine()) != null){
//                    if(!line.equals("view comments")){
//                         server_file_writer.write(line);
//                         server_file_writer.newLine();
//                         System.out.println("write to comments request from client "+line);
//                    else{
                         while ((line = file_reader.readLine()) != null){
                              writer.write(line);
                              writer.newLine();
                              System.out.println("view comments request from client "+line);
               writer.newLine();
               writer.close();
//               send_data_to_client(client_socket,filename);
//               streamIn.close();
//               client_socket.close();
          catch(IOException exception){
               exception.printStackTrace();
               System.out.println("IO Error in streams " + exception);
}here is the client code
     void send_comments_to_server(){
          DataOutputStream output_stream;
          String host = "C001192097";     //server host name
          try {
               Socket client = new Socket(host, 4321);
               output_stream = new DataOutputStream(client.getOutputStream());
               BufferedReader stream_input = new BufferedReader(new InputStreamReader(client.getInputStream()));
               BufferedWriter writer = new BufferedWriter(new FileWriter("commentsfromserver",false));
               XStream xstream = new XStream_Data_Analyser();
               String comment_report = get_title_text_field().getText();
               Comments comment = new Comments();
               User_Data user_data = new User_Data();
               String user_info = "User Name: "+user_data.user_name+" "+"Host Name: "+user_data.host_name+" "+"Domain Name: "+ user_data.domain_name;
               comment.user_info = user_info;
               comment.summary = comment_report;
               comment.comments = get_comments_text_area().getText();
               String report = xstream.toXML(comment);
               String line;
               if (view_comments == true){
                    output_stream.writeBytes("view comments");
                    view_comments = false;
//               else{
//                    output_stream.writeBytes(report+"\n");
               while((line = stream_input.readLine()) != null){
                         writer.write(line);
                         writer.newLine();
                         System.out.println("data received from server "+line);
//               output_stream.close();
//               stream_input.close();
//               client.close();
          }catch (UnknownHostException exception){
               System.err.println(host + ": unknown host.");
          catch (IOException exception){
               System.err.println("I/O error with " + host);
               exception.printStackTrace();
     }and this is the exception msg i get:
java.net.SocketException: Software caused connection abort: socket write error
     at java.net.SocketOutputStream.socketWrite0(Native Method)
     at java.net.SocketOutputStream.socketWrite(Unknown Source)
     at java.net.SocketOutputStream.write(Unknown Source)
     at java.io.DataOutputStream.writeBytes(Unknown Source)
     at data_analyser.Improvements_Dialog.send_comments_to_server(Improvements_Dialog.java:131)
     at data_analyser.Improvements_Dialog$2.actionPerformed(Improvements_Dialog.java:170)
     at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
     at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at javax.swing.JComponent.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Window.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
thanks for your help
sree
Edited by: sreecs on Sep 17, 2008 5:13 PM