diff --git a/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java b/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java
index 47ccc375d2671a5cf86c545b8c2b77ff1c053698..a95d95748eb8d8774fd482b10b535cf1a5d1c718 100644
--- a/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java
+++ b/assignments/src/MV3500Cohort2021JulySeptember/homework1/PughTcp2ConnectionCounting.java
@@ -48,7 +48,7 @@ public class PughTcp2ConnectionCounting {
while (true) {
// blocks! then proceeds once a connection is "accept"ed
try ( Socket clientConnection = serverSocket.accept()) {
- connectionCount++; // got another one!
+
OutputStream os = clientConnection.getOutputStream();
PrintStream ps = new PrintStream(os);
@@ -58,11 +58,11 @@ public class PughTcp2ConnectionCounting {
if (connectionCount % 2 == 1) {
System.out.println("Go\n");
}
- if (connectionCount % 2 == 0) {
- System.out.println("Gators!\n");
+ if (connectionCount % 2 == 0 && connectionCount % 3 == 1) {
+ System.out.println("Gators!");
}
if (connectionCount % 3 == 1 && connectionCount != 0) {
- System.out.println("O'Doyle Rules!!! \n");
+ System.out.println("O'Doyle Rules!!!");
}
ps.println("You were connection #" + connectionCount + ", by my count");
@@ -89,6 +89,7 @@ public class PughTcp2ConnectionCounting {
// a while after the client has stopped needing this
// connection. Close() explicitly ends the connection.
ps.flush();
+ connectionCount++; // got another one!
}
}
} catch (IOException e) {
diff --git a/assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherClient.java b/assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherClient.java
index 256202cd33f873e8b414c9d071c4b4a54ba6d087..00de0484e3b43b1a65a98be8f45d2ab5f96f8339 100644
--- a/assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherClient.java
+++ b/assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherClient.java
@@ -10,7 +10,7 @@ import java.io.PrintStream;
import java.net.Socket;
/**
- * Before, we always used telnet (netcat) to connect to the server. Here we are
+ * Before, we always used telnet (netcat) to connect to 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
diff --git a/assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherServer.java b/assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherServer.java
index 164e32a072be7227420787be72028f85fb2f54c6..c6b16ee66f6232df0f0735a47b0f92d762a3a038 100644
--- a/assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherServer.java
+++ b/assignments/src/MV3500Cohort2021JulySeptember/homework2/Fisher/FisherServer.java
@@ -59,7 +59,7 @@ public class FisherServer {
// Made a loop counter for server to stop after 10 pings with client
while (serverLoopCount <= 10) {
- // block until connected to a client
+ // block until connected to the client
try ( Socket clientConnectionSocket = serverSocket.accept()) {
// Now hook everything up (i.e. set up the streams), Java style:
diff --git a/assignments/src/MV3500Cohort2021JulySeptember/homework2/Pugh/Pugh3Client_homework2.java b/assignments/src/MV3500Cohort2021JulySeptember/homework2/Pugh/Pugh3Client_homework2.java
new file mode 100644
index 0000000000000000000000000000000000000000..31734f0c3cbdfd0fc34a01c0c4a62ac41953bf82
--- /dev/null
+++ b/assignments/src/MV3500Cohort2021JulySeptember/homework2/Pugh/Pugh3Client_homework2.java
@@ -0,0 +1,111 @@
+package MV3500Cohort2021JulySeptember.homework2.Pugh;
+
+import 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 mcgredo
+ * @author brutzman
+ */
+public class Pugh3Client_homework2 {
+
+ /**
+ * 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"; //Local host
+
+ /**
+ * Program invocation, execution starts here
+ *
+ * @param args command-line arguments
+ */
+ 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(Pugh3Client_homework2.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("==================================================");
+
+ if (clientLoopCount == 1) {
+ System.out.print("Client loop " + clientLoopCount + ": ");
+ System.out.println("now we're talking!");
+ System.out.println("The message the server sent was: '" + serverMessage + "'");
+ // socket gets closed, either automatically/silently by this code (or possibly by the server)
+ }
+
+ if (clientLoopCount == 2){
+ System.out.println("I'm ready. Shoot.");
+ }
+
+ if ( clientLoopCount == 3){
+ System.out.println("That is a horrible joke.");
+ }
+
+ if (clientLoopCount >= 4){
+ System.out.println("No...");
+ }
+ 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 " + Pugh3Client_homework2.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(Pugh3Client_homework2.class.getName() + " exit");
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2021JulySeptember/homework2/Pugh/Pugh3Server.java b/assignments/src/MV3500Cohort2021JulySeptember/homework2/Pugh/Pugh3Server.java
new file mode 100644
index 0000000000000000000000000000000000000000..bd33baf4091f733c0cbc4a602cdc50f92fcce79d
--- /dev/null
+++ b/assignments/src/MV3500Cohort2021JulySeptember/homework2/Pugh/Pugh3Server.java
@@ -0,0 +1,124 @@
+package MV3500Cohort2021JulySeptember.homework2.Pugh;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ * Very slightly more complex than example1, further modifying example2. The
+ * only thing this does differently is introduce a loop into the response, so
+ * you don't have to restart the program after one response. Also, it prints out
+ * the socket pair the server sees. Run the program via telnet several times and
+ * compare the socket pairs.
+ *
+ * telnet (nc) localhost 2317
+ *
+ * If you're sophisticated you can contact the instructor's computer while
+ * running this program.
+ *
+ * telnet (nc) [ipNumberOfServerLaptop] 2317
+ *
+ * and have the instructor display the socket pairs received.
+ *
+ * @author mcgredo
+ * @author brutzman
+ */
+public class Pugh3Server {
+
+ /**
+ * 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
+ */
+ public static void main(String[] args) {
+ 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(Pugh3Server.class.getName() + " has started..."); // it helps debugging to put this on console first
+
+ ServerSocket serverSocket = new ServerSocket(2317);
+ 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);
+ ps.println("This is response " + serverLoopCount + " produced by the server.\n"); // this gets sent back to client!
+
+ // 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 + "\n");
+
+
+ // 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?
+ if (serverLoopCount == 1) {
+ System.out.println(Pugh3Server.class.getName() + " socket pair showing host name, address, port:");
+ System.out.println(" (( "
+ + localAddress.getHostName() + "=" + localAddress.getHostAddress() + ", " + localPort + " ), ( "
+ + remoteAddress.getHostName() + "=" + remoteAddress.getHostAddress() + ", " + remotePort + " ))\n");
+
+ if (localAddress.getHostName().equals(localAddress.getHostAddress())
+ || remoteAddress.getHostName().equals(remoteAddress.getHostAddress())) {
+ System.out.println(" note HostName matches address if host has no DNS name\n");
+ }
+ }
+
+ if (serverLoopCount == 1) {
+ System.out.println("Ready for some great Dad Jokes?!?\n");
+ }
+ if (serverLoopCount == 2) {
+ System.out.println("Ok, get ready...\n");
+ }
+ if (serverLoopCount == 3) {
+ System.out.print("A ham sandwich walks into a bar and orders a beer. The bartender says, Sorry, we don’t serve food here.\n");
+ }
+
+ if (serverLoopCount == 4) {
+ System.out.println("Funny, right?\n");
+ }
+
+ if (serverLoopCount >= 5) {
+ System.out.print("Keep laughing, it's funny!\n");
+ }
+
+ // Notice 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 " + Pugh3Server.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!");
+ }
+ }
+ }
+}
diff --git a/examples/src/TcpExamples/TcpExample3Client.java b/examples/src/TcpExamples/TcpExample3Client.java
index 30ea9e36bb658e398060ebc7b30f02096b071e80..f5f7e1c5a842de1a4567ee27837c6e6ee01b5f36 100644
--- a/examples/src/TcpExamples/TcpExample3Client.java
+++ b/examples/src/TcpExamples/TcpExample3Client.java
@@ -20,7 +20,7 @@ public class TcpExample3Client {
* @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";
+ public final static String LOCALHOST = "0:0:0:0:0:0:0:1"; //Local host
/**
* Program invocation, execution starts here