Homework 2 networking Frisco

deliverables/src/MV3500Cohort2018JulySeptember/homework2/Frisco/FriscoAssignment2Client.java

+package MV3500Cohort2018JulySeptember.homework2.Frisco;
+
+import java.io.*;
+import java.net.*;
+import java.util.Scanner;
+
+/**
+ * Before, we always used telnet 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 we ran it.
+ *
+ * @author mcgredo
+ */
+
+public class FriscoAssignment2Client {
+
+	public final static String LOCALHOST = "0:0:0:0:0:0:0:1"; // String constant, i.e. 127.0.0.1
+
+	public static void main(String[] args) {
+		boolean openConnection = true;
+		try {
+			while (openConnection) {
+				System.out.println("The Client is creating socket and it's wait for it...its going to be.... Legendary!");  
+
+				// 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 the Socket
+				// object; the server uses a ServerSocket to wait for
+				// connections.
+				Socket socket = new Socket(LOCALHOST, 2317); // locohost? who be crazy now?
+
+				// Now hook everything up (i.e. set up the streams), Java style:
+				InputStream is = socket.getInputStream();
+				InputStreamReader isr = new InputStreamReader(is);
+				BufferedReader br = new BufferedReader(isr);
+                                
+                                // Read the single line written by the server. We'd
+				// do things a bit differently if many lines to be read
+				// from the server, instead of one only.
+
+                                //
+				String serverMessage = br.readLine();
+				System.out.println("==================================================");
+				System.out.println("Now we're talking!");
+				System.out.println("\nThe message the server sent was " + serverMessage ); 
+
+				//System.out.println("\nSTOP! Who would cross the Bridge of Death must answer me these questions three, ere the other side he see. ");
+				while (openConnection)   
+				{
+					System.out.println("\nSTOP! Who would cross the Bridge of Death must answer me these questions three, ere the other side he see. ");
+					Scanner incomingMessage = new Scanner(System.in); 
+					String s = incomingMessage.nextLine(); 
+					OutputStream os = socket.getOutputStream(); 
+					PrintStream ps = new PrintStream(os); 
+					ps.println("Client Reply: " + s); 
+				 
+					serverMessage = br.readLine();  
+					System.out.println(serverMessage); 
+					if(serverMessage.contains("Huh")) 
+					{
+						openConnection = false;
+						socket.close();
+					}
+                        // aboved lines of code were ideas of Maj Furr on how to get the client to type to the server, 
+                                 //this is what I was also doing so I borrowed his code
+
+				}
+			} 
+		} catch (IOException e) {
+			System.out.println("Problem with client: "); // describe what is happening
+			System.out.println(e);
+		}
+		// program exit: tell somebody about that
+		System.out.println("client exit.. YOU may Pass!!");
+	}
+
+}

deliverables/src/MV3500Cohort2018JulySeptember/homework2/Frisco/FriscoAssignment2Server.java

+package MV3500Cohort2018JulySeptember.homework2.Frisco;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ * Very slightly more complex than example1. A complete copy of example 2. 
+ * 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 localhost 2317 
+ * If you're sophisticated you can contact the instructor's computer while running this program.
+ *
+ * telnet <ipOfServersLaptop> 2317
+ *
+ * And have him display the socket pairs he got.
+ *
+ * @author mcgredo
+ */
+public class FriscoAssignment2Server {
+
+	public static void main(String[] args) throws IOException {
+		
+		String[] serverQuestions = new String[7];  //canned responses for multiple inputs from client
+		serverQuestions[0] = "What... is your name?";
+		serverQuestions[1] = "What.... is your quest?";
+		serverQuestions[2] = "What.....  is your favorite color?";
+		serverQuestions[3] = "What... is your name?";
+		serverQuestions[4] = "What.... is your quest?";
+		serverQuestions[5] = "What.....  is the air-speed velocity of an unladen swallow?";
+		serverQuestions[6] = "Huh ? I--I don't know that. Auuuuuuuugh!!";
+		int index = 0;
+		
+		try {
+			
+
+			ServerSocket serverSocket = new ServerSocket(2317);
+			System.out.println("Server Socket open and waiting");
+			boolean connectionActive; 
+			
+			// Loop, infinitely, waiting for client connections.
+			// Stop the program somewhere else.
+			while(true)
+			{
+			Socket clientConnection = serverSocket.accept(); // block until connected
+			connectionActive = true; //ensure after every new connection the boolean is reset to true.
+			index =0; //reset the index for responses back to 0 each time a new connection happens.
+			
+			while (connectionActive) {
+
+				OutputStream os = clientConnection.getOutputStream();
+				PrintStream ps = new PrintStream(os);
+				ps.println("This was written by the server");
+
+				InputStream serverIS = clientConnection.getInputStream();
+				InputStreamReader serverISR = new InputStreamReader(serverIS);
+				BufferedReader br = new BufferedReader(serverISR);
+				String line;
+
+				// Print some information locally about the Socket
+				// connection. This includes the port and IP numbers
+				// on both sides (the socket pair.)
+				InetAddress localAddress = clientConnection.getLocalAddress();
+				InetAddress remoteAddress = clientConnection.getInetAddress();
+
+				int localPort = clientConnection.getLocalPort();
+				int remotePort = clientConnection.getPort();
+				System.out.println("\nSocket pair: (( " + localAddress.toString() + ", " + localPort + " ), ( "
+						+ remoteAddress.toString() + ", " + remotePort + " ))");
+				while (index < 7) {
+					//while ((line = br.readLine()) != null)//&& index<10)
+					{
+						
+
+						System.out.println("\n" + br.readLine() ); //line);  //prints out what is recieved from client
+						ps.println("\tThe SERVER has responded with: " + serverQuestions[index]);  //sends the prewritten response
+						System.out.println("Server has sent: " + serverQuestions[index]); //tells server user what was sent
+						index++;  //goes to next response. 
+
+						// Notice the use of flush() and close(). Without
+						// the close() to Socket object may stay open for 
+						// a while after the client has stopped needing this
+						// connection. Close() explicitly ends the connection.
+					}
+					
+				}
+				connectionActive = false;
+				ps.flush();
+				clientConnection.close(); 
+			}
+			}
+			
+		} catch (IOException e) {
+			System.out.println("Danger Danger Will Robinson!! the Network is failing" + e);
+		}
+
+	}
+
+}