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Commit 429a504b authored by Brutzman, Don's avatar Brutzman, Don
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source programs moved into corresponding subpackage matching student names

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assignments/src/MV3500Cohort2021JulySeptember/homework2/AllenTcpExample3Client.java deleted 100644 → 0
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package MV3500Cohort2021JulySeptember.homework2;
import java.io.*;
import java.net.*;
/**
* Before, we always used telnet (netcat) to connect to the server. Here we are
* now writing our own program to do the connection.
*
* As you will see, when we run this after we start the server we will see the
* same string telnet printed, sent by the server. The output at the server will
* show different socket pairs for each time the loop iterates.
*
* @author snapp
*/
public class AllenTcpExample3Client {
/** IPv6 String constant for localhost address, similarly IPv4 127.0.0.1
* @see <a href="https://en.wikipedia.org/wiki/localhost">https://en.wikipedia.org/wiki/localhost</a>
* @see <a href="https://en.wikipedia.org/wiki/IPv6_address">https://en.wikipedia.org/wiki/IPv6_address</a>
*/
public final static String LOCALHOST = "0:0:0:0:0:0:0:1";
/**
* Program invocation, execution starts here
* @param args command-line arguments
* @throws java.lang.InterruptedException user cancels execution
*/
public static void main(String[] args) throws InterruptedException {
// Local variables/fields
Socket socket = null;
InputStream is;
Reader isr;
BufferedReader br;
String serverMessage;
int clientLoopCount = 0;
try {
while (true)
{
clientLoopCount++; // increment at beginning of loop for reliability
System.out.println(AllenTcpExample3Client.class.getName() + " creating socket...");
// We request an IP to connect to ("localhost") and
// port number at that IP (2317). This establishes
// a connection to that IP in the form of a Socket
// object; the server uses a ServerSocket to wait for
// connections.
socket = new Socket(LOCALHOST, 2317); // locohost?
// Now hook everything up (i.e. set up the streams), Java style:
is = socket.getInputStream();
isr = new InputStreamReader(is);
br = new BufferedReader(isr);
// Read a single line written by the server. We'd
// do things a bit differently if there were many lines to be read
// from the server instead of one only.
serverMessage = br.readLine();
System.out.println("==================================================");
System.out.println("Sorry, my dog ate my homework.");
System.out.println("The AllenServer responds with: " + serverMessage + "'");
System.out.println("Yeah, it took him a few bytes! This this my " + clientLoopCount +" time trying to contact you.");
// socket gets closed, either automatically/silently by this code (or possibly by the server)
Thread.sleep(500l); // slow things down, for example 500l (long) = 500 msec
} // end while(true) // infinite loops are dangerous, be sure to kill this process!
}
catch (IOException e)
{
System.err.println("Problem with " + AllenTcpExample3Client.class.getName() + " networking:"); // describe what is happening
System.err.println("Error: " + e);
// Provide more helpful information to user if exception occurs due to running twice at one time
if (e instanceof java.net.BindException) {
System.err.println("*** Be sure to stop any other running instances of programs using this port!");
}
}
finally // occurs after any other activity when shutting down
{
try {
if (socket != null)
socket.close();
} catch (IOException e) {}
// program exit: tell somebody about that happening. Likely cause: server drops connection.
System.out.println();
System.out.println(AllenTcpExample3Client.class.getName() + " exit");
}
}
}
assignments/src/MV3500Cohort2021JulySeptember/homework2/FrankTcpExample3Client.java → assignments/src/MV3500Cohort2021JulySeptember/homework2/Frank/FrankTcpExample3Client.java
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− 1
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package MV3500Cohort2021JulySeptember.homework2; package MV3500Cohort2021JulySeptember.homework2.Frank;
import java.io.BufferedReader; import java.io.BufferedReader;
import java.io.IOException; import java.io.IOException;
......
assignments/src/MV3500Cohort2021JulySeptember/homework2/FrankClient.java deleted 100644 → 0
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View file @ 14ed2c9b
package MV3500Cohort2021JulySeptember.homework2;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.Socket;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author justi
*/
public class FrankClient {
/**
*/
public final static String LOCALHOST = "0:0:0:0:0:0:0:1";
/**
* Program invocation, execution starts here
*
* @param args command-line arguments
* @throws java.lang.InterruptedException user cancels execution
*/
public static void main(String[] args) throws InterruptedException {
// Local variables/fields
Socket socket = null;
InputStream is;
Reader isr;
BufferedReader br;
String serverMessage;
int clientLoopCount = 0;
try {
while (true) {
clientLoopCount++; // increment at beginning of loop for reliability
System.out.println( "creating socket...");
// We request an IP to connect to ("localhost") and
// port number at that IP (2317). This establishes
// a connection to that IP in the form of a Socket
// object; the server uses a ServerSocket to wait for
// connections.
socket = new Socket(LOCALHOST, 2318); // locohost?
// Now hook everything up (i.e. set up the streams), Java style:
is = socket.getInputStream();
isr = new InputStreamReader(is);
br = new BufferedReader(isr);
// Read a single line written by the server. We'd
// do things a bit differently if there were many lines to be read
// from the server instead of one only.
serverMessage = br.readLine();
System.out.println("*********************************");
System.out.print( clientLoopCount + ": ");
System.out.println("Hola!");
System.out.println("The message the server sent was: '" + serverMessage + "'");
int count = 0;
System.out.println("test");
count++;
// socket gets closed, either automatically/silently by this code (or possibly by the server)
if (serverMessage.equals("this is good bye message from Franks server")) { //if client recieved termanation message stop client
break;
}
Thread.sleep(1000); // turned it down to 1 second
} // end while(true) // infinite loops are dangerous, be sure to kill this process!
} catch (IOException e) {
System.err.println("Problem with " + FrankClient.class.getName() + " networking:"); // describe what is happening
System.err.println("Error: " + e);
// Provide more helpful information to user if exception occurs due to running twice at one time
if (e instanceof java.net.BindException) {
System.err.println("*** Be sure to stop any other running instances of programs using this port!");
}
} finally // occurs after any other activity when shutting down
{
try {
if (socket != null) {
socket.close();
}
} catch (IOException e) {
}
// program exit: tell somebody about that happening. Likely cause: server drops connection.
System.out.println();
System.out.println("Good Bye!!!");
}
}
}
assignments/src/MV3500Cohort2021JulySeptember/homework2/FrankServer.java deleted 100644 → 0
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View file @ 14ed2c9b
package MV3500Cohort2021JulySeptember.homework2;
import java.io.*;
import java.net.*;
public class FrankServer {
/**
* Program invocation, execution starts here If already compiled, can run
* using console in directory ../../build/classes/ by invoking \ java
* -classpath . TcpExamples.TcpExample3Server
*
* @param args command-line arguments
* @throws java.lang.InterruptedException user cancels execution
*/
public static void main(String[] args) throws InterruptedException {
try {
// ServerSocket waits for a connection from a client.
// Notice that it is outside the loop; ServerSocket
// needs to be made only once.
System.out.println(FrankServer.class.getName() + " has started..."); // it helps debugging to put this on console first
ServerSocket serverSocket = new ServerSocket(2318); // changed from 2317 to 2318
OutputStream os;
PrintStream ps;
InetAddress localAddress, remoteAddress;
int localPort, remotePort;
int serverLoopCount = 0;
// Server is up and waiting (i.e. "blocked" or paused)
// Loop, infinitely, waiting for client connections.
// Stop the program somewhere else.
while (true) {
// block until connected to a client
try ( Socket clientConnectionSocket = serverSocket.accept()) {
serverLoopCount++; // increment at beginning of loop for reliability
// Now hook everything up (i.e. set up the streams), Java style:
os = clientConnectionSocket.getOutputStream();
ps = new PrintStream(os);
if (serverLoopCount <= 10) { // checking if the loop count <= 10
ps.println("How are you doing?"); // this gets sent back to client!
} else {
ps.println("this is good bye message from Franks server"); // termination after 20 messages
break; // Stop server
}
// Print some information locally about the Socket connection.
// This includes the port and IP numbers on both sides (the socket pair).
localAddress = clientConnectionSocket.getLocalAddress();
remoteAddress = clientConnectionSocket.getInetAddress();
localPort = clientConnectionSocket.getLocalPort();
remotePort = clientConnectionSocket.getPort();
System.out.print("Server loop " + serverLoopCount + ": ");
// My socket pair connection looks like this, to localhost:
// Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54876 ))
// Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
// Why is the first IP/port the same, while the second set has different ports?
System.out.println(FrankServer.class.getName() + " socket pair showing host name, address, port:");
System.out.println(" (( "
+ localAddress.getHostName() + "=" + localAddress.getHostAddress() + ", " + localPort + " ), ( "
+ remoteAddress.getHostName() + "=" + remoteAddress.getHostAddress() + ", " + remotePort + " ))");
if (localAddress.getHostName().equals(localAddress.getHostAddress())
|| remoteAddress.getHostName().equals(remoteAddress.getHostAddress())) {
System.out.println(" note HostName matches address if host has no DNS name");
}
// Not/*i*/ce the use of flush() and try w/ resources. Without
// the try w/ resources the Socket object may stay open for
// a while after the client has stopped needing this
// connection. try w/ resources explicitly ends the connection.
ps.flush();
// like it or not, you're outta here!
}
}
} catch (IOException e) {
System.err.println("Problem with " + FrankServer.class.getName() + " networking: " + e);
// Provide more helpful information to user if exception occurs due to running twice at one time
if (e instanceof java.net.BindException) {
System.err.println("*** Be sure to stop any other running instances of programs using this port!");
}
}
}
}
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