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Commits
| Author | SHA1 | Date | |
|---|---|---|---|
 2025mohseni
|
6d9c65f3a0 |
@@ -1,20 +1,60 @@
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package com.university.chat.Client;
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public class ServerListener implements Runnable{
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// TODO: store the ObjectInputStream from the user socket
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// (this should be the same input stream the
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// chatClient created when connecting)
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import com.university.chat.Common.ChatMessage;
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import com.university.chat.Common.FileMessage;
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import com.university.chat.Common.MessageType;
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import java.io.EOFException;
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import java.io.ObjectInputStream;
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public class ServerListener implements Runnable {
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private final ObjectInputStream in;
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private final String username;
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public ServerListener(ObjectInputStream in, String username) {
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this.in = in;
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this.username = username;
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}
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@Override
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public void run() {
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try {
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// TODO: In an infinite loop read objects from the server
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// - if it's a ChatMessage -> print "<sender>: <content>"
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// - if it's a FileMessage -> print that a file was received
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// (filename + sender), it's already
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// saved to disk by the server.
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} catch (Exception e){
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System.out.println("Disconnected from server");
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while (true) {
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Object obj = in.readObject();
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if (obj instanceof ChatMessage msg) {
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// نمایش لیست کاربران
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if (msg.getType() == MessageType.USER_LIST) {
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System.out.println("\n👥 Online Users:");
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System.out.println("━━━━━━━━━━━━━━━━━━━━");
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System.out.println(msg.getContent());
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System.out.println("━━━━━━━━━━━━━━━━━━━━\n");
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continue;
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}
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// نمایش پیام عمومی
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if (msg.getType() == MessageType.PUBLIC_MESSAGE) {
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System.out.println("[PUBLIC] " + msg.getSender() + ": " + msg.getContent());
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continue;
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}
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// نمایش پیام خصوصی
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if (msg.getType() == MessageType.PRIVATE_MESSAGE) {
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System.out.println("[PRIVATE] " + msg.getSender() + ": " + msg.getContent());
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continue;
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}
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// پیامهای سیستمی
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System.out.println(msg.getContent());
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} else if (obj instanceof FileMessage fileMsg) {
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System.out.println("[FILE RECEIVED] " + fileMsg.getFilename() + " from " + fileMsg.getSender());
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}
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}
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} catch (EOFException e) {
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System.out.println("Server disconnected.");
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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@@ -1,29 +1,127 @@
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package com.university.chat.Client;
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public class chatClient {
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public static void main() {
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// TODO: Connecting to the server
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// 1. Create a socket and connect to the server
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// 2. Create an ObjectOutputStream (out) and ObjectInputStream (in)
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// from the socket's streams — output FIRST, then input.
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// 2. Get the username, and send a LOGIN ChatMessage with that username
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// 3. Start a new Thread running a ServerListener(in) so incoming
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// messages are handled concurrently.
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import com.university.chat.Common.ChatMessage;
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import com.university.chat.Common.FileMessage;
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import com.university.chat.Common.MessageType;
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while (true){
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try {
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// TODO: Program loop — read a line from the console and act on it:
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// - "/msg <user> <text>" -> build & send a PRIVATE_MESSAGE
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// - "/users" -> build & send a USER_LIST request
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// - "/sendfile <user> <path>" -> read the file into a byte[]
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// (you can use TransferProgress
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// to show progress)
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// and send it as a FileMessage
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// - anything else -> send a PUBLIC_MESSAGE
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// Remember to flush() the output stream after writeObject().
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} catch (Exception e){
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System.out.println("command failed: " + e.getMessage());
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import java.io.*;
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import java.net.Socket;
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import java.util.Scanner;
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public class chatClient {
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public static void main(String[] args) {
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try (Socket socket = new Socket("localhost", 12345);
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ObjectOutputStream out = new ObjectOutputStream(socket.getOutputStream());
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ObjectInputStream in = new ObjectInputStream(socket.getInputStream());
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Scanner scanner = new Scanner(System.in)) {
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System.out.println("Connected to server.");
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// Login
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System.out.print("Username: ");
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String username = scanner.nextLine();
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out.writeObject(new ChatMessage(MessageType.LOGIN, username, null, null));
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out.flush();
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String finalUsername = username;
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// شروع listener
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new Thread(new ServerListener(in, finalUsername)).start();
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boolean running = true;
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while (running) {
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// نمایش منو
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System.out.println("\n╔════════════════════════════════╗");
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System.out.println("║ Chat Menu ║");
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System.out.println("╠════════════════════════════════╣");
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System.out.println("║ 1. Send Public Message ║");
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System.out.println("║ 2. Send Private Message ║");
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System.out.println("║ 3. View Online Users ║");
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System.out.println("║ 4. Send File ║");
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System.out.println("║ 5. Exit ║");
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System.out.println("╚════════════════════════════════╝");
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System.out.print("Choose an option: ");
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String choice = scanner.nextLine().trim();
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switch (choice) {
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case "1":
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// ارسال پیام عمومی
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System.out.print("Enter your message: ");
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String publicMessage = scanner.nextLine();
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if (!publicMessage.isEmpty()) {
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out.writeObject(new ChatMessage(MessageType.PUBLIC_MESSAGE, finalUsername, null, publicMessage));
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out.flush();
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}
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break;
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case "2":
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// ارسال پیام خصوصی
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System.out.print("Enter recipient username: ");
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String recipient = scanner.nextLine().trim();
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System.out.print("Enter your message: ");
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String privateMessage = scanner.nextLine();
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if (!recipient.isEmpty() && !privateMessage.isEmpty()) {
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out.writeObject(new ChatMessage(MessageType.PRIVATE_MESSAGE, finalUsername, recipient, privateMessage));
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out.flush();
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} else {
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System.out.println("❌ Recipient and message cannot be empty!");
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}
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break;
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case "3":
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// درخواست لیست کاربران
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out.writeObject(new ChatMessage(MessageType.USER_LIST, finalUsername, null, null));
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out.flush();
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System.out.println("📋 Requesting online users...");
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break;
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case "4":
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// ارسال فایل
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System.out.print("Enter recipient username: ");
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String fileRecipient = scanner.nextLine().trim();
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System.out.print("Enter file path: ");
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String filePath = scanner.nextLine().trim();
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if (!fileRecipient.isEmpty() && !filePath.isEmpty()) {
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try {
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File file = new File(filePath);
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if (!file.exists()) {
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System.out.println("❌ File not found: " + filePath);
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break;
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}
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byte[] data = new byte[(int) file.length()];
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try (FileInputStream fis = new FileInputStream(file)) {
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fis.read(data);
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}
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out.writeObject(new FileMessage(finalUsername, fileRecipient, file.getName(), data));
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out.flush();
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System.out.println("✅ File sent: " + file.getName() + " to " + fileRecipient);
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} catch (IOException e) {
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System.out.println("❌ Could not send file: " + e.getMessage());
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}
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} else {
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System.out.println("❌ Recipient and file path cannot be empty!");
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}
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break;
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case "5":
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// خروج
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System.out.println("👋 Goodbye!");
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out.writeObject(new ChatMessage(MessageType.LOGOUT, finalUsername, null, null));
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out.flush();
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running = false;
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break;
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default:
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System.out.println("❌ Invalid option! Please choose 1-5.");
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break;
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}
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}
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} catch (IOException e) {
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System.out.println("❌ Could not connect to server: " + e.getMessage());
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}
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}
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}
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@@ -1,13 +1,11 @@
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package com.university.chat.Common;
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import java.io.Serializable;
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public enum MessageType implements Serializable {
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public enum MessageType {
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LOGIN,
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LOGIN_SUCCESS,
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LOGIN_FAILED,
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PUBLIC_MESSAGE,
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PRIVATE_MESSAGE,
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USER_LIST,
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FILE_TRANSFER
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LOGOUT
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}
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@@ -1,15 +1,27 @@
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package com.university.chat.Server;
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import java.io.IOException;
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import java.net.ServerSocket;
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import java.net.Socket;
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public class ChatServer {
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// TODO: declare a single shared UserManager instance (static final)
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// This MUST be shared by all ClientSession threads so that
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// broadcasting and private messaging work correctly.
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private static final int PORT = 12345;
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private static final UserManager userManager = new UserManager();
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public static void main(String[] args) {
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// TODO: Create a ServerSocket
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try (ServerSocket serverSocket = new ServerSocket(PORT)) {
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System.out.println("Server started on port " + PORT);
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// TODO: In an infinite loop:
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// accept an incoming client connection
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// make a new thread running ClientSession for each user.
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while (true) {
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Socket clientSocket = serverSocket.accept();
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ClientSession session = new ClientSession(clientSocket, userManager);
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Thread thread = new Thread(session);
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thread.start();
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}
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} catch (IOException e) {
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System.out.println("Server error: " + e.getMessage());
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}
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}
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}
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@@ -2,70 +2,154 @@ package com.university.chat.Server;
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import com.university.chat.Common.ChatMessage;
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import com.university.chat.Common.FileMessage;
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import com.university.chat.Common.MessageType;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.net.Socket;
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import java.nio.file.Files;
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public class ClientSession implements Runnable {
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private String username;
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private ObjectOutputStream out;
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private ObjectInputStream in;
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private UserManager userManager;
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private Socket socket;
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public ClientSession(Socket socket, UserManager userManager) {
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// TODO : Create an ObjectOutputStream from socket.getOutputStream()
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// and an ObjectInputStream from socket.getInputStream().
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this.socket = socket;
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this.userManager = userManager;
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try {
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// CRITICAL: ObjectOutputStream MUST be created before ObjectInputStream
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this.out = new ObjectOutputStream(socket.getOutputStream());
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this.out.flush();
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this.in = new ObjectInputStream(socket.getInputStream());
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} catch (IOException e) {
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System.out.println("Error setting up streams: " + e.getMessage());
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}
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}
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@Override
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public void run() {
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try {
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// --- Login Step ---
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Object firstObj = in.readObject();
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if (!(firstObj instanceof ChatMessage loginMsg) || loginMsg.getType() != MessageType.LOGIN) {
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socket.close();
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return;
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}
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// TODO: Welcome the user (login step)
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// 1. Read the first object sent by the client.
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// 2. Check it's a ChatMessage with type LOGIN.
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// 3. Extract the username.
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// 4. Try to register the user via userManager.addUser(...).
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// 5. If the username is taken, send back LOGIN_FAILED and close the socket.
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// 6. Otherwise, create the user's folders with FileManager.createUserFolders(...)
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// and send back LOGIN_SUCCESS.
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username = loginMsg.getSender();
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boolean registered = userManager.addUser(username, this);
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// TODO: Main message loop
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// In a loop, call in.readObject(), you can separate messages by their type:
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// - if it's a ChatMessage -> call handleChatMessage(msg)
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// - if it's a FileMessage -> call handleFileMessage(fileMsg)
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// Keep looping until the connection is closed (an exception will be thrown).
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if (!registered) {
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sendMessage(new ChatMessage(MessageType.LOGIN_FAILED, "server", username, "Username already taken"));
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socket.close();
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return;
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}
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FileManager.createUserFolders(username);
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sendMessage(new ChatMessage(MessageType.LOGIN_SUCCESS, "server", username, "Welcome " + username + "!"));
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System.out.println("User connected: " + username);
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// --- Main Message Loop ---
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while (true) {
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try {
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Object obj = in.readObject();
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if (obj instanceof ChatMessage msg) {
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handleChatMessage(msg);
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} else if (obj instanceof FileMessage fileMsg) {
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handleFileMessage(fileMsg);
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}
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} catch (Exception e) {
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System.out.println("Connection lost for: " + username);
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break;
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}
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}
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} catch (Exception e) {
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System.out.println("Disconnected: " + username);
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System.out.println("Session error for: " + username);
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} finally {
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// TODO: Remove the user from UserManager so they no longer
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// receive broadcasts or appear in users list
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if (username != null) {
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userManager.removeUser(username);
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System.out.println("User disconnected: " + username);
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}
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try { socket.close(); } catch (IOException ignored) {}
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}
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}
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private void handleChatMessage(ChatMessage msg) throws IOException {
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private void handleChatMessage(ChatMessage msg) {
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switch (msg.getType()) {
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case PUBLIC_MESSAGE -> {
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// TODO: Broadcast this message to every connected client.
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System.out.println("[PUBLIC] " + username + ": " + msg.getContent());
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for (ClientSession session : userManager.getAllSessions()) {
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session.sendMessage(msg);
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}
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}
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case PRIVATE_MESSAGE -> {
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// TODO: Forward this message to the receiver user.
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String receiver = msg.getReceiver();
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ClientSession target = userManager.getUser(receiver);
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if (target != null) {
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// Send to receiver (avoid double-send if sender == receiver)
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target.sendMessage(msg);
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if (!receiver.equals(username)) {
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// Echo back to sender so they see their own sent message
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sendMessage(msg);
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}
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} else {
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sendMessage(new ChatMessage(
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MessageType.PRIVATE_MESSAGE,
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"server", username,
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"User '" + receiver + "' is not online."
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));
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}
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}
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case USER_LIST -> {
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// TODO: Reply to the requester with the list of online users.
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String list = userManager.listUsers();
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sendMessage(new ChatMessage(MessageType.USER_LIST, "server", username, list));
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}
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}
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}
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private void handleFileMessage(FileMessage fileMsg) throws IOException {
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// Storing the file
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var sentPath = FileManager.getSentPath(fileMsg.getSender(), fileMsg.getFilename());
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var recvPath = FileManager.getReceivedPath(fileMsg.getReceiver(), fileMsg.getFilename());
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private void handleFileMessage(FileMessage fileMsg) {
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try {
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var sentPath = FileManager.getSentPath(fileMsg.getSender(), fileMsg.getFilename());
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var recvPath = FileManager.getReceivedPath(fileMsg.getReceiver(), fileMsg.getFilename());
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Files.write(sentPath, fileMsg.getData());
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Files.write(recvPath, fileMsg.getData());
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} catch (IOException e) {
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System.out.println("Failed to save file: " + e.getMessage());
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}
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Files.write(sentPath, fileMsg.getData());
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Files.write(recvPath, fileMsg.getData());
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ClientSession receiver = userManager.getUser(fileMsg.getReceiver());
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if (receiver != null) {
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receiver.sendFile(fileMsg);
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} else {
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sendMessage(new ChatMessage(
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MessageType.PRIVATE_MESSAGE,
|
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"server", username,
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"User '" + fileMsg.getReceiver() + "' is not online. File was saved on server."
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));
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}
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}
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// TODO: Forward the received file-message to the destination user.
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public synchronized void sendMessage(ChatMessage msg) {
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try {
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out.writeObject(msg);
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out.flush();
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} catch (IOException e) {
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System.out.println("Failed to send message to " + username);
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}
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}
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public synchronized void sendFile(FileMessage fileMsg) {
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try {
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out.writeObject(fileMsg);
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out.flush();
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} catch (IOException e) {
|
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System.out.println("Failed to send file to " + username);
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}
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}
|
||||
}
|
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Reference in New Issue
Block a user