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Client.java

TP-Sockets

/*Classe Client.java*/
import java.net.*;
import java.io.*;

public class Serveur {
    public static void main(String[] args) throws IOException {

        ServerSocket sSocket = null;
        try {
            sSocket = new ServerSocket(4444);
        } catch (IOException e) {
            System.err.println("Port inaccessible: 4444.");
     
        }

        Socket clientSocket = null;
        try {
            clientSocket = sSocket.accept();
        } catch (IOException e) {
            System.err.println("Accept a échoué.");
        
        }

        PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
        BufferedReader in = new BufferedReader(
                                new InputStreamReader(
                                clientSocket.getInputStream()));
        String inLigne, outLigne;
        UnProtocol p = new UnProtocol();

        outLigne = p.traiterRequete(null);
        out.println(outLigne);

        while ((inLigne = in.readLine()) != null) {
             outLigne = p.traiterRequete(inLigne);
             out.println(outLigne);
             if (outLigne.equals("Au revoir"))
                break;
        }
        out.close();
        in.close();
        clientSocket.close();
        sSocket.close();
    }
}
import java.io.*;

import java.net.*;

public class Client {
    public static void main(String[] args) throws IOException {

        Socket cSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;
  
        try {
            cSocket = new Socket("127.0.0.1", 4444);
            out = new PrintWriter(cSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(cSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Host inconnu: 127.0.0.1.");
           
        } catch (IOException e) {
            System.err.println("Connexion impossible: localhost.");

        }

        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
        String reponse;
        String requete;

        while ((reponse = in.readLine()) != null) {
            System.out.println("Serveur: " + reponse);
            if (reponse.equals("AU REVOIR."))
                break;

            requete = stdIn.readLine();
            if (requete != null) {
                System.out.println("Client: " + requete);
                out.println(requete);
            }
        }

        out.close();
        in.close();
        stdIn.close();
        cSocket.close();
    }
}

/*Classe UnProtocol.java*/
import java.net.*;
import java.io.*;
import java.util.*;

public class UnProtocol {
    private static final int ATTENTE = 0;
    private static final int BIENVENUE = 1;

    private int etat = ATTENTE;

    public String traiterRequete(String Entree) {
        String sortie = null;

        switch (etat){

        case ATTENTE :
            sortie = "SERVEUR PRET";
            etat = BIENVENUE;
            break;
        case BIENVENUE:
            if (Entree.equalsIgnoreCase("DATE")) {Calendar cl=Calendar.getInstance();
                sortie = (cl.getTime()).toString();
                            } else if (Entree.equalsIgnoreCase("FIN")){
                sortie="AU REVOIR.";
                etat=ATTENTE;
            }
            else {
                sortie = "Commandes possibles DATE ou FIN";
            }
                }
        return sortie;
    }
}

/*Classe Serveur.java*/
import java.net.*;
import java.io.*;

public class Serveur {
    public static void main(String[] args)  {

        ServerSocket sSocket = null;
        try {
            ServerSocket = new sSocket(4444);
        } catch (IOException e) {
            System.err.println("Port inaccessible: 4444.");
     
        }

        Socket clientSocket = null;
        try {
            clientSocket = sSocket.accept();
        } catch (IOException e) {
            System.err.println("Accept a échoué.");
        
        }

        PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
        BufferedReader in = new BufferedReader(
                                new InputStreamReader(
                                clientSocket.getInputStream()));
        String inLigne, outLigne;
        UnProtocol p = new UnProtocol();

        outLigne = p.traiterRequete(null);
        out.println(outLigne);

        while ((inLigne = in.readLine()) != null) {
             outLigne = p.traiterRequete(inLigne);
             out.println(outLigne);
             if (outLigne.equals("Au revoir"))
                break;
        }
        out.close();
        in.close();
        clientSocket.close();
        sSocket.close();
    }
}

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