sync updates

MediaBrowser.Api/BaseApiService.cs

@@ -73,6 +73,17 @@ namespace MediaBrowser.Api
             return ResultFactory.GetOptimizedResultUsingCache(Request, cacheKey, lastDateModified, cacheDuration, factoryFn);
         }
 
+        /// <summary>
+        /// Infers the server address from the url
+        /// </summary>
+        /// <returns></returns>
+        protected string GetServerAddress()
+        {
+            var index = Request.AbsoluteUri.IndexOf(Request.PathInfo, StringComparison.OrdinalIgnoreCase);
+
+            return Request.AbsoluteUri.Substring(0, index);
+        }
+
         protected void AssertCanUpdateUser(IUserManager userManager, string userId)
         {
             var auth = AuthorizationContext.GetAuthorizationInfo(Request);