Tell new users how to list possible commands.

README.md

@@ -1,7 +1,6 @@
-ConsoleChat
+ConsoleChat-Server
-===========
+==================
-
+This is the _server-side_ to the __ConsoleChat__ project. This code takes care of handling commands and sending the information to all the other clients connected.
-This program was made as a personal project to learn Java network programming. The concept of it is rather simple, all it does is send messages to a server which, in turn, sends the message to everyone else (aside from some other commands added). Although the license is MIT, please consider also disclosing the source-code under an open-source license. It helps to give back to the community and help others just like this may have helped you.
 
 ### Compiling
 To compile the source code, make sure you have JDK and Apache Ant installed. Then run the following command:

build.xml

@@ -1,10 +1,9 @@
-<project name="ConsoleChat" basedir="." default="main" >
+<project name="ConsoleChat-Server" basedir="." default="main" >
 	<property name="src.dir" value="src" />
 	<property name="bin.dir" value="bin" />
 	<property name="classes.dir" value="${bin.dir}/classes" />
 	<property name="jar.dir" value="${bin.dir}/jar" />
-	<property name="main-class-client" value="consolechat.client.Client" />
+	<property name="main-class" value="consolechat.server.Server" />
-	<property name="main-class-server" value="consolechat.server.Server" />
 	
 	<target name="clean" >
 		<delete dir="bin" />
@@ -17,14 +16,9 @@
 	
 	<target name="jar" depends="compile" >
 		<mkdir dir="${jar.dir}" />
-		<jar destfile="${jar.dir}/${ant.project.name}-client.jar" basedir="${classes.dir}" >
+		<jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}" >
 			<manifest>
-				<attribute name="Main-Class" value="${main-class-client}" />
+				<attribute name="Main-Class" value="${main-class}" />
-			</manifest>
-		</jar>
-		<jar destfile="${jar.dir}/${ant.project.name}-server.jar" basedir="${classes.dir}" >
-			<manifest>
-				<attribute name="Main-Class" value="${main-class-server}" />
 			</manifest>
 		</jar>
 	</target>

src/consolechat/client/Client.java

@@ -1,116 +0,0 @@
-package consolechat.client;
-
-import java.net.*;
-import java.io.*;
-import java.lang.*;
-
-/**
- * @author Nicolás A. Ortega
- * @copyright Nicolás A. Ortega
- * @license MIT
- * @year 2014
- * 
- */
-public class Client implements Runnable {
-	private String version = "v1.0.1";
-	private Socket socket = null;
-	private ClientThread cThread = null;
-	private DataOutputStream streamOut = null;
-	private BufferedReader console = null;
-	private Thread thread = null;
-
-	public static void main(String[] args) {
-		if(args.length != 2) {
-			System.out.println("Usage: consolechat-client [server] [port]");
-		} else {
-			new Client(args[0], Integer.parseInt(args[1]));
-		}
-	}
-
-	// Constructor method
-	public Client(String server, int port) {
-		System.out.println("ConsoleChat client " + version + " Copyright (C) 2014 Nicolás A. Ortega\n" +
-			"This program comes with ABSOLUTELY NO WARRANTY; details in WARRANTY file.\n" +
-			"This is free software, and you are welcome to redistribute it\n" +
-			"under certain conditions; details in LICENSE file.\n");
-
-		try {
-			// Create a new socket connection
-			System.out.println("Connecting to server...");
-			socket = new Socket(server, port);
-			System.out.println("Connected!");
-			start();
-		} catch(UnknownHostException uhe) {
-			System.out.println("Host unknown: " + uhe.getMessage());
-		} catch(IOException e) {
-			System.out.println("Unknown exception: " + e.getMessage());
-		}
-	}
-
-	// The run method containing the main loop
-	public void run() {
-		String uinput;
-		while(thread != null) {
-			try {
-				uinput = console.readLine();
-				if(uinput.equals("/clientVersion")) {
-					System.out.println(version);
-				} else {
-					streamOut.writeUTF(uinput);
-					streamOut.flush();
-				}
-			} catch(IOException e) {
-				System.out.println("Sending error: " + e.getMessage());
-				stop();
-			}
-		}
-	}
-
-	// Handle messages
-	public void handle(String msg) {
-		if(msg.equals("/quit")) {
-			System.out.println("Goodbye bye. Press RETURN to exit...");
-			stop();
-		} else {
-			System.out.println(msg);
-			if(msg.length() > 6 && msg.substring(0, 5).equals("Kick:")) {
-				stop();
-			}
-		}
-	}
-
-	// Open and start all necessary threads
-	private void start() throws IOException {
-		console = new BufferedReader(new InputStreamReader(System.in));
-		streamOut = new DataOutputStream(socket.getOutputStream());
-		
-		if(thread == null) {
-			cThread = new ClientThread(this, socket);
-			thread = new Thread(this);
-			thread.start();
-		}
-	}
-
-	// Stop and close all necessary threads
-	public void stop() {
-		if(thread != null) {
-			thread.interrupt();
-			thread = null;
-		}
-
-		try {
-			if(console != null) { console.close(); }
-			if(streamOut != null) { streamOut.close(); }
-			if(socket != null) { socket.close(); }
-		} catch(IOException e) {
-			System.out.println("Error closing...");
-		}
-
-		try {
-			cThread.close();
-		} catch(IOException e) {
-			System.out.println("Error closing the thread: " + e);
-		}
-		cThread.interrupt();
-	}
-}

src/consolechat/client/ClientThread.java

@@ -1,58 +0,0 @@
-package consolechat.client;
-
-import java.io.*;
-import java.net.*;
-
-/**
- * @author Nicolás A. Ortega
- * @copyright Nicolás A. Ortega
- * @license MIT
- * @year 2014
- * 
- * For details on the copyright, look at the COPYRIGHT file that came with
- * this program.
- * 
- */
-public class ClientThread extends Thread {
-	private Socket socket = null;
-	private Client client = null;
-	private DataInputStream streamIn = null;
-	private boolean run = false;
-
-	// Constructor
-	public ClientThread(Client _client, Socket _socket) {
-		client = _client;
-		socket = _socket;
-		open();
-		start();
-	}
-
-	// Open all necessary streams/threads
-	public void open() {
-		try {
-			streamIn = new DataInputStream(socket.getInputStream());
-		} catch(IOException e) {
-			System.out.println("Error getting input stream: " + e);
-			client.stop();
-		}
-		run = true;
-	}
-
-	// Close the streams
-	public void close() throws IOException {
-		if(streamIn != null) { streamIn.close(); }
-		run = false;
-	}
-
-	// The run method which will be called every frame
-	public void run() {
-		while(run) {
-			try {
-				client.handle(streamIn.readUTF());
-			} catch(IOException e) {
-				System.out.println("Listening error: " + e.getMessage());
-				client.stop();
-			}
-		}
-	}
-}

src/consolechat/server/Server.java

@@ -10,17 +10,15 @@ import java.util.*;
  * @license MIT
  * @year 2014
  * 
- * For details on the copyright, look at the COPYRIGHT file that came with
- * this program.
- * 
  */
 public class Server implements Runnable {
-	private String version = "v1.0.1";
+	private String version = "v1.1";
 	private ArrayList<ServerThread> clients = new ArrayList<ServerThread>();
 	private ServerSocket sSocket = null;
 	private Thread thread = null;
 	private int clientCount = 0;
 	private String passwd = "admin";
+	private ArrayList<String> banned = new ArrayList<String>();
 
 	public static void main(String[] args) {
 		if(args.length != 1) {
@@ -45,6 +43,27 @@ public class Server implements Runnable {
 		} catch(IOException e) {
 			System.out.println(e);
 		}
+
+		// Read admin password
+		try {
+			BufferedReader passwdbuffer = new BufferedReader(new FileReader("adminpasswd.txt"));
+			try {
+				passwd = passwdbuffer.readLine();
+			} catch(IOException ioe) {
+				System.out.println("Error reading from adminpassword.txt.");
+			}
+		} catch(FileNotFoundException fnfe) { System.out.println("No adminpasswd.txt file."); }
+
+		// Read banned list
+		try {
+			String bannedIP;
+			BufferedReader banbuffer = new BufferedReader(new FileReader("banned.txt"));
+			try {
+				while((bannedIP = banbuffer.readLine()) != null) {
+					banned.add(bannedIP);
+				}
+			} catch(IOException ioe) { System.out.println("Error while reading from banned.txt"); }
+		} catch(FileNotFoundException fnfe) { System.out.println("No banned.txt file."); }
 	}
 
 	// The run method that will be called every frame
@@ -124,6 +143,14 @@ public class Server implements Runnable {
 				} else {
 					clients.get(findClient(id)).send("You are not admin.");
 				}
+			} else if(input.length() > 11 && input.substring(0, 4).equals("/ban")) {
+				if(clients.get(findClient(id)).isAdmin()) {
+					int bID = Integer.parseInt(input.substring(5, 10));
+					String reason = input.substring(11);
+					ban(bID, reason);
+				} else {
+					clients.get(findClient(id)).send("You are not admin.");
+				}
 			} else if(input.length() > 10 && input.substring(0, 10).equals("/giveadmin")) {
 				if(clients.get(findClient(id)).isAdmin()) {
 					int aID = Integer.parseInt(input.substring(11));
@@ -144,10 +171,25 @@ public class Server implements Runnable {
 		}
 	}
 
+	// Ban a client
+	public void ban(int id, String reason) {
+		int pos = findClient(id);
+		if(pos < 0) return;
+		String clientAddress = clients.get(pos).getSocket().getRemoteSocketAddress().toString();
+		String clientIP = clientAddress.substring(1, clientAddress.indexOf(':'));
+		try {
+			PrintWriter banwriter = new PrintWriter(new BufferedWriter(new FileWriter("banned.txt", true)));
+			banwriter.println(clientIP);
+			banwriter.close();
+		} catch(IOException ioe) { System.out.println("Error printing client IP '" + clientIP + "' to banned.txt ."); }
+		clients.get(pos).send("You have been banned from this server.\nReason: " + reason);
+		remove(id);
+	}
+
 	// Remove a client
 	public synchronized void remove(int id) {
 		int pos = findClient(id);
-		if(pos >= 0) {
+		if(pos < 0) return;
 		ServerThread toTerminate = clients.get(pos);
 		System.out.println("Remove client thread: " + id + " at " + pos);
 		try {
@@ -164,13 +206,20 @@ public class Server implements Runnable {
 		}
 		toTerminate.interrupt();
 	}
-	}
 
 	// Add a new client
 	public void addThread(Socket socket) {
+		// If IP is banned to not admit!
+		String clientAddress = socket.getRemoteSocketAddress().toString();
+		String clientIP = clientAddress.substring(1, clientAddress.indexOf(':'));
+		for(int i = 0; i < banned.size(); i++) {
+			if(clientIP.equals(banned.get(i))) return;
+		}
+		// Otherwise add them
 		clients.add(new ServerThread(this, socket));
 		try {
 			clients.get(clientCount).open();
+			clients.get(clientCount).send("Use /help for a list of commands.\n");
 			clients.get(clientCount).start();
 			clientCount++;
 		} catch(IOException e) {
@@ -182,5 +231,16 @@ public class Server implements Runnable {
 	public String getPasswd() { return passwd; }
 
 	// Setter methods
-	public void setPasswd(String npasswd) { this.passwd = npasswd; }
+	public void setPasswd(String npasswd) {
+		this.passwd = npasswd;
+		try {
+			PrintWriter writer = new PrintWriter("adminpasswd.txt", "UTF-8");
+			writer.println(npasswd);
+			writer.close();
+		} catch(UnsupportedEncodingException uee) {
+			System.out.println("Error writing new password to adminpasswd.txt");
+		} catch(FileNotFoundException fnfe) {
+			System.out.println("Error writing new password to adminpasswd.txt");
+		}
+	}
 }

src/consolechat/server/ServerThread.java

@@ -9,9 +9,6 @@ import java.io.*;
  * @license MIT
  * @year 2014
  * 
- * For details on the copyright, look at the COPYRIGHT file that came with
- * this program.
- * 
  */
 public class ServerThread extends Thread {
 	private Server server = null;
@@ -74,7 +71,8 @@ public class ServerThread extends Thread {
 				send("Admin commands:\n" +
 					" - /chgpasswd [newpasswd] -- Change the server admin password.\n" +
 					" - /giveadmin [id] -- Give another client admin as well.\n" +
-					" - /kick [id] [reason] -- Kick out a user and state a reason for the kick.\n");
+					" - /kick [id] [reason] -- Kick out a user and state a reason for the kick.\n" +
+					" - /ban [id] [reason] -- Ban a user from ever being able to connect to the server again.\n");
 			}
 		} else if(command.length() > 6 && command.substring(0, 6).equals("/admin")) {
 			if(command.substring(7).equals(server.getPasswd())) {
@@ -123,6 +121,7 @@ public class ServerThread extends Thread {
 
 	// Getter methods
 	public int getID() { return id; }
+	public Socket getSocket() { return socket; }
 	public String getUsername() { return username; }
 	public boolean isAdmin() { return admin; }