Enhance/fix rest server

ToDo.Server/Controllers/TodoController.cs

@@ -44,29 +44,30 @@ public IHttpActionResult Create([FromBody] TodoItem item)
 				return BadRequest();
 			}
 			TodoItems.Add(item);
-			return CreatedAtRoute("GetTodo", new { id = item.Key }, item);
-		}
+            return CreatedAtRoute("DefaultApi", new { id = item.Key }, item);
+        }
 
+        /// <summary>
+        /// Update the given item using the default PUT route
+        /// </summary>
+        /// <param name="item">the item to update with the modified data</param>
+        /// <returns>200 OK if success</returns>
 		[HttpPut]
-		[Route("{id}")]
-		public IHttpActionResult Update(string id, [FromBody] TodoItem item)
-		{
-			if (item == null || item.Key != id)
-			{
-				return BadRequest();
-			}
+        [Route("{id}")]
+        public IHttpActionResult Update([FromBody] TodoItem item)
+        {
+            if (item == null)
+                return BadRequest();
 
-			var todo = TodoItems.Find(id);
-			if (todo == null)
-			{
-				return NotFound();
-			}
+            var todo = TodoItems.Find(item.Key);
+            if (todo == null)
+                return NotFound();
 
-			TodoItems.Update(item);
-			return Ok();
-		}
+            TodoItems.Update(item);
+            return Ok();
+        }
 
-		[HttpPut]
+        [HttpPut]
 		[Route("{id}")]
 		public IHttpActionResult Update([FromBody] TodoItem item, string id)
 		{

ToDo.Server/Program.cs

@@ -1,20 +1,54 @@
 using System;
 using Microsoft.Owin.Hosting;
+using System.Net.NetworkInformation;
+using System.Net;
 
 namespace TodoApi
 {
-	public class Program
-	{
-		protected static void Main(string[] args)
-		{
-			var port = 8080;
-			var url = $"http://localhost:{port}";
-			using (WebApp.Start<Startup>(url))
-			{
-				Console.WriteLine($"Web Server is running at {url}.");
-				Console.WriteLine("Press any key to quit.");
-				Console.ReadLine();
-			}
-		}
-	}
+    public class Program
+    {
+        protected static void Main(string[] args)
+        {
+            var port = 8080;
+            var url = $"http://localhost:{port}";
+
+            if (IsPortAvailable(port))
+            {
+                using (WebApp.Start<Startup>(url))
+                {
+                    Console.WriteLine($"Web Server is running at {url}.");
+                    Console.WriteLine("Press any key to quit.");
+                    Console.ReadLine();
+                }
+            }
+            else
+            {
+                Console.WriteLine($"The port {port} is being used by your system. Try with another port");
+                Console.WriteLine("Press any key to quit.");
+                Console.ReadLine();
+            }
+
+
+        }
+
+        /// <summary>
+        /// Check if the port is being used by the system
+        /// </summary>
+        /// <param name="port">TCP port</param>
+        /// <returns></returns>
+        private static bool IsPortAvailable(int port)
+        {
+            IPGlobalProperties ipGlobalProperties = IPGlobalProperties.GetIPGlobalProperties();
+            IPEndPoint[] tcpListenersEndPoints = ipGlobalProperties.GetActiveTcpListeners();
+
+            foreach (var tcpEp in tcpListenersEndPoints)
+            {
+                if (tcpEp.Port == port)
+                    return false;
+            }
+
+            return true;
+        }
+    }
 }
+