add null checks to video methods

1 files changed, 15 insertions, 0 deletions

diff --git a/MediaBrowser.Controller/Resolvers/EntityResolutionHelper.cs b/MediaBrowser.Controller/Resolvers/EntityResolutionHelper.cs
index 3cd38da45..079571ee9 100644
--- a/MediaBrowser.Controller/Resolvers/EntityResolutionHelper.cs
+++ b/MediaBrowser.Controller/Resolvers/EntityResolutionHelper.cs
@@ -66,6 +66,11 @@ namespace MediaBrowser.Controller.Resolvers
         /// <returns><c>true</c> if [is multi part file] [the specified path]; otherwise, <c>false</c>.</returns>
         public static bool IsMultiPartFile(string path)
         {
+            if (string.IsNullOrEmpty(path))
+            {
+                throw new ArgumentNullException("path");
+            }
+
             return MultiFileRegex.Match(path).Success || MultiFolderRegex.Match(path).Success;
         }
 
@@ -97,6 +102,11 @@ namespace MediaBrowser.Controller.Resolvers
         /// <returns><c>true</c> if [is audio file] [the specified args]; otherwise, <c>false</c>.</returns>
         public static bool IsAudioFile(string path)
         {
+            if (string.IsNullOrEmpty(path))
+            {
+                throw new ArgumentNullException("path");
+            }
+
             var extension = Path.GetExtension(path);
 
             if (string.IsNullOrEmpty(extension))
@@ -114,6 +124,11 @@ namespace MediaBrowser.Controller.Resolvers
         /// <returns><c>true</c> if [is video file] [the specified path]; otherwise, <c>false</c>.</returns>
         public static bool IsVideoFile(string path)
         {
+            if (string.IsNullOrEmpty(path))
+            {
+                throw new ArgumentNullException("path");
+            }
+
             var extension = Path.GetExtension(path);
 
             if (string.IsNullOrEmpty(extension))