PRACTICAL 16
WRITE A PROGRAM TO IMPLEMENT CHAT SERVER USING SERVERSOCKET AND SOCKET
CLASS.
1) Write a program to check credentials of users (Client will send user id and
password to server and server will authenticate the client using equals() ).
Server:
/*
Client Will Send UserID and Password to Server will Authenticate the client
using equals()
*/
import java.net.ServerSocket;
import java.net.Socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.InputStreamReader;
public class ValidateServer
{
public static void main(String[] args) throws IOException
{
ServerSocket s = new ServerSocket(2019);
System.out.println("Server Started, waiting for client");
Socket s1 = s.accept();
BufferedReader br = new BufferedReader(
new InputStreamReader(s1.getInputStream())
);
String user = br.readLine();
String pass = br.readLine();
OutputStream out = s1.getOutputStream();
PrintStream ps = new PrintStream(out);
if(user.equals("abc") && pass.equals("1234"))
{
ps.println("Validate Successfully");
}
else
{
ps.println("Validate Un-Successfull");
}
}
}
Client:
import java.net.Socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
public class ValidateClient
{
public static void main(String[] args) throws IOException {
Socket s = new Socket("localhost" , 2019);
BufferedReader br = new BufferedReader(
new InputStreamReader(System.in)
);
System.out.print("Enter Username and Password: ");
String user = br.readLine();
String pass = br.readLine();
OutputStream os = s.getOutputStream();
PrintStream ps = new PrintStream(os);
ps.println(user);
ps.println(pass);
BufferedReader br1 = new BufferedReader(
new InputStreamReader(s.getInputStream())
);
String res = br1.readLine();
System.out.println(res);
}
}
2)Write a program using Socket and ServerSocket to create Chat
Application.
ServerSide:
import java.net.ServerSocket;
import java.net.Socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.InputStreamReader;
public class ServerSide
{
public static void main(String[] args) throws IOException
{
ServerSocket s = new ServerSocket(2019);
System.out.println("Server Started, waiting for
client");
Socket s1 = s.accept();
// Client Send
BufferedReader br = new BufferedReader(
new InputStreamReader(s1.getInputStream())
);
OutputStream out = s1.getOutputStream();
PrintStream ps = new PrintStream(out);
BufferedReader br1 = new BufferedReader(
new InputStreamReader(System.in)
);
do{
String res = br.readLine();
System.out.println("Client Send: "+res);
System.out.print("Server: ");
String msg = br1.readLine();
System.out.print("\n\n");
ps.println(msg);
}
while(true);
}
}
ClientSide:
import java.net.Socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
public class ClientSice
{
public static void main(String[] args) throws IOException {
Socket s = new Socket("localhost",2019);
System.out.println("Client Started, waiting for server
response..");
BufferedReader br = new BufferedReader(
new InputStreamReader(System.in)
);
OutputStream os = s.getOutputStream();
BufferedReader br1 = new BufferedReader(
new InputStreamReader(s.getInputStream())
);
PrintStream ps = new PrintStream(os);
do{
System.out.print("Client: ");
String msg = br.readLine();
ps.println(msg);
String res = br1.readLine();
System.out.println("Server Send:"+res+"\n\n");
}
while(true);
}
}
