P6-P15: init

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

P11.java

@@ -0,0 +1,31 @@
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+public class P11 extends HttpServlet {
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        Cookie[] cookies = request.getCookies();
+
+        boolean isNewVisitor = true;
+        int visitCount = 1;
+
+        if (cookies != null) {
+            for (Cookie cookie : cookies) {
+                if (cookie.getName().equals("visitCount")) {
+                    isNewVisitor = false;
+                    visitCount = Integer.parseInt(cookie.getValue());
+                    visitCount++;
+                    break;
+                }
+            }
+        }
+
+        Cookie visitCountCookie = new Cookie("visitCount", String.valueOf(visitCount));
+        visitCountCookie.setMaxAge(24 * 60 * 60);
+        response.addCookie(visitCountCookie);
+        response.setStatus(HttpServletResponse.SC_OK);
+    }
+}