15/11/2022

src/Main.java

@@ -1,5 +0,0 @@
-public class Main {
-    public static void main(String[] args) {
-        System.out.println("Hello world!");
-    }
-}

src/client/Client.java

@@ -0,0 +1,42 @@
+package client;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.net.Socket;
+import java.rmi.UnknownHostException;
+
+public class Client {
+    public static void main(String[] args) throws IOException {
+        Socket echoSocket = null;
+        PrintWriter out = null;
+        BufferedReader in = null;
+
+        try {
+            echoSocket = new Socket("localhost", 4444);
+            System.out.println("Connecté au serveur");
+            out = new PrintWriter(echoSocket.getOutputStream(), true);
+            in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
+        } catch (UnknownHostException e) {
+            System.out.println("Destination unknown");
+            System.exit(-1);
+        } catch (IOException e) {
+            System.out.println("now to investigate this IO issue");
+            System.exit(-1);
+        }
+
+        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
+        String userInput;
+
+        while ((userInput = stdIn.readLine()) != null) {
+            out.println(userInput);
+            System.out.println("echo: " + userInput);
+        }
+
+        out.close();
+        in.close();
+        stdIn.close();
+        echoSocket.close();
+    }
+}

src/reseau/ResolutionDeNom.java

@@ -0,0 +1,27 @@
+package reseau;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+public class ResolutionDeNom {
+
+    public static InetAddress getAddress(String host) {
+        InetAddress address;
+        try {
+            address = InetAddress.getByName(host);
+            return address;
+        } catch (UnknownHostException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    public static void main(String[] args) {
+//        String input = args[0];
+        String input = "www.google.com";
+        InetAddress address = getAddress(input);
+        if (address != null) {
+            System.out.printf("%s : %s\n", input, address.getHostAddress());
+        }
+    }
+}

src/serveur/Serveur.java

@@ -0,0 +1,58 @@
+package serveur;
+
+import java.io.*;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+public class Serveur {
+    public static void main(String[] args) {
+        ServerSocket serverSocket = null;
+        try {
+            serverSocket = new ServerSocket(4444);
+        } catch (IOException e) {
+            System.out.println("Could not listen on port 4444");
+            System.exit(-1);
+        }
+
+        Socket clientSocket = null;
+        try {
+            clientSocket = serverSocket.accept();
+        } catch (IOException e) {
+            System.out.println("Accept failed on port 4444");
+            System.exit(-1);
+        }
+
+        System.out.println("Client connecté");
+        boolean quitte = false;
+        boolean reception = true;
+
+        DataOutputStream envoi = null;
+        BufferedReader recevoir = null;
+
+        try {
+            OutputStream outputStream = clientSocket.getOutputStream();
+            envoi = new DataOutputStream(outputStream);
+            recevoir = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
+
+            while (!quitte) {
+                if (reception) {
+                    String message = null;
+                    while (message == null){
+                        message = recevoir.readLine();
+                    }
+                    while(message != null){
+                        System.out.println(message);
+                        message= recevoir.readLine();
+                    }
+
+                }
+                reception = !reception;
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+
+
+    }
+}