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- import java.lang.*;
- import java.io.*;
- import java.net.*;
- class Server {
- public static void main(String args[]) {
- String welcome = "Welcome! The server is now connected.";
- String login = "Enter username and password: ";
- String message;
- try {
- //Detecting the localhost's ip address
- InetAddress localaddr = InetAddress.getLocalHost();
- System.out.println("SERVER\n");
- System.out.println ("Local hostnameIP: " + localaddr );
- // Creating a server socket for connection
- ServerSocket srvr = new ServerSocket(1234);
- System.out.println("Waiting for connection on "+localaddr);
- // Accept incoming connection
- Socket skt = srvr.accept();
- System.out.print("Server has connected!\n");
- // get Input and Output streams
- PrintWriter out = new PrintWriter(skt.getOutputStream(), true);
- out.flush();
- BufferedReader in = new BufferedReader(new InputStreamReader(skt.getInputStream()));
- BufferedReader log = new BufferedReader(new InputStreamReader(skt.getInputStream())); //read input for login
- System.out.print("Sending string: '" + welcome + "'\n");
- out.println(welcome);
- out.println(login);
- //out.println(enterUser);
- //login
- //out.print("Username: ");
- String username = in.readLine();
- System.out.println("Client's username: " + username);
- //out.print("Password: ");
- String password = in.readLine();
- System.out.println("Client's password: " + password);
- if (username.equals("hello123") && password.equals("mypass")) {
- out.println("Correct login!");
- System.out.println ("Client's IP Address: " + localaddr.getHostAddress());
- }
- if (!username.equals("hello123")||!password.equals("mypass")) {
- out.println("Wrong login - server closing");
- out.close();
- skt.close();
- srvr.close();
- }
- do {
- message=in.readLine();
- System.out.println("client> "+message);
- if (message.equals("password")){
- out.println("Access Granted");
- }else if (message.equals("bye")){
- out.println("Server closing");
- System.out.println("server> Server closing");
- }
- }while(!message.equals("bye"));
- out.close();
- skt.close();
- srvr.close();
- }catch(BindException e){
- //e.printStackTrace();
- System.out.print("A server is already running on the same port.");
- }catch(SocketException e) {
- //e.printStackTrace();
- System.out.print("Client has disconnected rudely.");
- }catch(Exception e){
- //e.printStackTrace();
- System.out.print(":( Whoops! It didn't work!\n");
- }
- }
- }
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