refactor: valdiate url before making a request

Author: mamoonraja

Connection/RESTConnector.cs

@@ -262,11 +262,16 @@ public bool? DisableSslVerification
         /// <param name="function">The name of the function.</param>
         /// <returns>Returns a RESTConnector object or null on error.</returns>
         ///
-        public static RESTConnector GetConnector(Authenticator authenticator, string function)
+        public static RESTConnector GetConnector(Authenticator authenticator, string function, string url)
         {
+            if (Utility.HasBadFirstOrLastCharacter(url))
+            {
+                throw new ArgumentException("The Url property is invalid. Please remove any surrounding {{, }}, or \" characters.");
+            }
+
             RESTConnector connector = new RESTConnector
             {
-                URL = authenticator.Url + function,
+                URL = url + function,
                 Authentication = authenticator
             };
             return connector;

Connection/WSConnector.cs

@@ -25,10 +25,10 @@
 using System.Security.Authentication;
 using IBM.Cloud.SDK.Authentication;
 using System.Threading;
+using System;
 #if !NETFX_CORE
 using UnitySDK.WebSocketSharp;
 #else
-using System;
 using System.Threading.Tasks;
 using Windows.Networking.Sockets;
 using Windows.Security.Credentials;
@@ -328,12 +328,17 @@ public static string FixupURL(string URL)
         /// <param name="function">The name of the function to connect.</param>
         /// <param name="args">Additional function arguments.</param>
         /// <returns>The WSConnector object or null or error.</returns>
-        public static WSConnector CreateConnector(Authenticator authenticator, string function, string args)
+        public static WSConnector CreateConnector(Authenticator authenticator, string function, string args, string url)
         {
+            if (Utility.HasBadFirstOrLastCharacter(url))
+            {
+                throw new ArgumentException("The Url property is invalid. Please remove any surrounding {{, }}, or \" characters.");
+            }
+
             WSConnector connector = new WSConnector();
             connector.Authentication = authenticator;
 
-            connector.URL = FixupURL(authenticator.Url) + function + args;
+            connector.URL = FixupURL(url) + function + args;
 
             return connector;
         }