diff --git a/deliverables/src/MV3500Cohort2018JulySeptember/homework2/Ayres_Server.java b/deliverables/src/MV3500Cohort2018JulySeptember/homework2/Ayres_Server.java new file mode 100644 index 0000000000000000000000000000000000000000..357c4b6815e86361ab914bdd7eeac294c464c906 --- /dev/null +++ b/deliverables/src/MV3500Cohort2018JulySeptember/homework2/Ayres_Server.java @@ -0,0 +1,91 @@ +/* + * 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. + */ +package MV3500Cohort2018JulySeptember.homework2.Ayres; + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.io.OutputStream; +import java.io.PrintStream; +import java.net.InetAddress; +import java.net.ServerSocket; +import java.net.Socket; + +/** + * + * @author kjayr + */ +public class Ayres_Server { + + @SuppressWarnings("ConvertToTryWithResources") + 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. + //Good reminder + + System.out.println("TcpServer has started..."); // it helps debugging to put this on console first. Keep. + ServerSocket serverSocket = new ServerSocket(2317); + + // Server is up and waiting (i.e. "blocked" or paused) + // Loop, infinitely, waiting for client connections. + // Stop the program somewhere else. + while (true) + { + Socket clientConnection = serverSocket.accept(); // block until connected to a client + + // Set up the streams, Java style: + OutputStream os = clientConnection.getOutputStream(); + PrintStream ps = new PrintStream(os); + + //Message to client + ps.println("**Strong connection to Server** Client operating..."); + + //________________________ + //Set up input streams/messages from client + InputStream is = clientConnection.getInputStream(); + InputStreamReader isr = new InputStreamReader(is); + BufferedReader br = new BufferedReader(isr); + String serverMessage = br.readLine(); + System.out.println("=================================================="); + System.out.println("The message the client sent was " + serverMessage); + //________________________ + + // 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(); + + // 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("Socket pair: (( " + localAddress.toString() + ", " + localPort + " ), ( " + + remoteAddress.toString() + ", " + remotePort + " ))"); + + // 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. + ps.flush(); + clientConnection.close(); // like it or not, you're outta here! + } + } + catch (IOException e) { + System.out.println("problem with networking"); + } + } + +}