OS with JAVA 8th Ed 3.15 Section 3.6.1 describes port numbers below 1024 as bein

Question

OS with JAVA 8th Ed

3.15 Section 3.6.1 describes port numbers below 1024 as being well known; that is, they provide standard services. Port 17 is known as the quote-ofthe- day service. When a client connects to port 17 on a server, the server responds with a quote for that day. Modify the date server shown in Figure 3.26 so that it delivers a quote of the day rather than the current date. The quotes should be printable ASCII characters and should contain fewer than 512 characters, although multiple lines are allowed. Since port 17 is considered well known and therefore unavailable, have your server listen to port 6017. The date client shown in Figure 3.27 may be used to read the quotes returned by your server.

import java.net.*;
import java.io.*;
public class DateServer
{
public static void main(String[] args) {
try {
ServerSocket sock = new ServerSocket(6013);
// now listen for connections
while (true) {
Socket client = sock.accept();
PrintWriter pout = new
PrintWriter(client.getOutputStream(), true);
// write the Date to the socket
pout.println(new java.util.Date().toString());
// close the socket and resume
// listening for connections
client.close();
}
}
catch (IOException ioe) {
System.err.println(ioe);
}
}
}

*****************************************************

import java.net.*;
import java.io.*;
public class DateClient
{
public static void main(String[] args) {
try {
//make connection to server socket
Socket sock = new Socket("127.0.0.1",6013);
InputStream in = sock.getInputStream();
BufferedReader bin = new
BufferedReader(new InputStreamReader(in));
// read the date from the socket
String line;
while ( (line = bin.readLine()) != null)
System.out.println(line);
// close the socket connection
sock.close();
}
catch (IOException ioe) {
System.err.println(ioe);
}
}
}

Explanation / Answer

import java.net.*;
import java.io.*;
public class DateServer
{
public static void main(String[] args) {
try {
ServerSocket sock = new ServerSocket(6013);
// now listen for connections
while (true) {
Socket client = sock.accept();
PrintWriter pout = new
PrintWriter(client.getOutputStream(), true);
// write the Quote of the Day to the socket
//change value of quote according to youe choice
String quote = "Please Write your quote of day!!"
pout.println(quote.toString());
// close the socket and resume
// listening for connections
client.close();
}
}
catch (IOException ioe) {
System.err.println(ioe);
}
}
}
*****************************************************
import java.net.*;
import java.io.*;
public class DateClient
{
public static void main(String[] args) {
try {
//make connection to server socket
Socket sock = new Socket("127.0.0.1",6013);
InputStream in = sock.getInputStream();
BufferedReader bin = new
BufferedReader(new InputStreamReader(in));
// read the date from the socket
String line;
while ( (line = bin.readLine()) != null)
System.out.println(line);
// close the socket connection
sock.close();
}
catch (IOException ioe) {
System.err.println(ioe);
}
}
}

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