added validation to the appconfig (remove code duplication)

Tv7Playlist/AppConfig.cs

@@ -1,3 +1,5 @@
+using System;
+
 namespace Tv7Playlist
 {
     public class AppConfig
@@ -5,12 +7,36 @@ namespace Tv7Playlist
         public enum SourceTypeEnum
         {
             M3U,
-            XSPF
+            Xspf
         }
-        
-        public string TV7Url { get; set; }
+
+        private string _tv7Url;
+        private string _udpxyUrl;
+
+        public string TV7Url
+        {
+            get => _tv7Url;
+            set
+            {
+                if (!Uri.IsWellFormedUriString(value, UriKind.Absolute))
+                    throw new ApplicationException($"The TV7Url is set to {value}. This is not a well formed uri!");
+                _tv7Url = value;
+            }
+        }
+
         public SourceTypeEnum SourceType { get; set; }
-        public string UdpxyUrl { get; set; }
+
+        public string UdpxyUrl
+        {
+            get => _udpxyUrl;
+            set
+            {
+                if (!Uri.IsWellFormedUriString(value, UriKind.Absolute))
+                    throw new ApplicationException($"The proxyUrl is set to {value}. This is not a well formed uri!");
+                _udpxyUrl = value;
+            }
+        }
+
         public string DownloadFileName { get; set; }
     }
 }

Tv7Playlist/Startup.cs

@@ -79,7 +79,7 @@ namespace Tv7Playlist
                 case AppConfig.SourceTypeEnum.M3U:
                     services.AddTransient<IPlaylistParser, M3UParser>();
                     break;
-                case AppConfig.SourceTypeEnum.XSPF:
+                case AppConfig.SourceTypeEnum.Xspf:
                     services.AddTransient<IPlaylistParser, XspfParser>();
                     break;
                 default: