get replay from server ?

[KorenRon]

Hello ,
I hava an application that send string to my server using udp
now I want the server to return an answer

what do I need to define in the application ?
do I need to change the sending to TCP and not UDP? so the server can return the answer?

Thanks,

 

[Greum]

What sort of reply are you looking for? You're going to have to have something on the server that is looking for your message so it can send a reply.

 

[KorenRon]

this is what I have now:
I'm sending UDP from the application to the server
the server is listening , when he get message he check if the string is OK (no spelling mistake) according to my setting
in the server side - if there is a problem in the string I get an exception
I want to be able to send this exception also to the application , so the user will also know there is a problem

example :
APP sending: "A12345A"
Server : string is OK - send to APP "OK

APP sending "A12A"
Server : string is not OK , Send to APP "bad message!,check";

Thanks,

 

[KorenRon]

I have setup a simple tcp_server on C#
and this is what I have found in java for tcp_client :

import java.io.*;
import java.net.*;

class TCPClient {
public static void main(String argv[]) throws Exception {
String sentence;
String modifiedSentence;
BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
Socket clientSocket = new Socket("localhost", 6789);
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
sentence = inFromUser.readLine();
outToServer.writeBytes(sentence + 'n');
modifiedSentence = inFromServer.readLine();
System.out.println("FROM SERVER: " + modifiedSentence);
clientSocket.close();
}
}

will this work?
or do I need to add something else?

Thanks ,

 

[23tony]

I would test the server independently, not via the app, to be sure it's returning the expected responses. Once you have that working, then integrate the app.

 

[KorenRon]

the server is returning what is need according to the message