10-sec-comp: Add socket challenge

Author: razvand

10-security-components/socket/EchoClient.java

@@ -0,0 +1,30 @@
+import java.io.*;
+import java.net.*;
+
+public class EchoClient {
+    public static void main(String[] args)
+            throws UnknownHostException, IOException {
+            Socket socket = null;
+            try {
+                socket = new Socket("localhost", 9999);
+                PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
+                BufferedReader in = new BufferedReader(
+                        new InputStreamReader(socket.getInputStream()));
+                BufferedReader stdIn = new BufferedReader(
+                        new InputStreamReader(System.in));
+                String userInput;
+                while ((userInput = stdIn.readLine()) != null) {
+                    out.println(userInput);
+                    System.out.println(in.readLine());
+                }
+            } finally {
+                if (socket != null) {
+                    try {
+                        socket.close();
+                    } catch (IOException e) {
+                        System.err.println(e);
+                    }
+                }
+            }
+    }
+}

10-security-components/socket/EchoServer.java

@@ -0,0 +1,28 @@
+import java.io.*;
+import java.net.*;
+
+public class EchoServer {
+    public static void main(String[] args) throws IOException {
+        ServerSocket serverSocket = null;
+        try {
+            serverSocket = new ServerSocket(9999);
+            Socket socket = serverSocket.accept();
+            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
+            BufferedReader in = new BufferedReader(
+                    new InputStreamReader(socket.getInputStream()));
+            String inputLine;
+            while ((inputLine = in.readLine()) != null) {
+                System.out.println(inputLine);
+                out.println(inputLine);
+            }
+        } finally {
+            if (serverSocket != null) {
+                try {
+                    serverSocket.close();
+                } catch (IOException e) {
+                    System.err.println(e);
+                }
+            }
+        }
+    }
+}