better error handling with image enhancers

MediaBrowser.Api/Images/ImageService.cs

@@ -658,7 +658,20 @@ namespace MediaBrowser.Api.Images
             // See if we can avoid a file system lookup by looking for the file in ResolveArgs
             var originalFileImageDateModified = kernel.ImageManager.GetImageDateModified(item, request.Type, index);
 
-            var supportedImageEnhancers = kernel.ImageEnhancers.Where(i => i.Supports(item, request.Type)).ToList();
+            var supportedImageEnhancers = kernel.ImageEnhancers.Where(i =>
+            {
+                try
+                {
+                    return i.Supports(item, request.Type);
+                }
+                catch (Exception ex)
+                {
+                    Logger.ErrorException("Error in image enhancer: {0}", ex, i.GetType().Name);
+
+                    return false;
+                }
+
+            }).ToList();
 
             // If the file does not exist GetLastWriteTimeUtc will return jan 1, 1601 as opposed to throwing an exception
             // http://msdn.microsoft.com/en-us/library/system.io.file.getlastwritetimeutc.aspx

MediaBrowser.Controller/Drawing/ImageManager.cs

@@ -531,7 +531,20 @@ namespace MediaBrowser.Controller.Drawing
                 throw new ArgumentNullException("item");
             }
 
-            var supportedEnhancers = _kernel.ImageEnhancers.Where(i => i.Supports(item, imageType)).ToList();
+            var supportedEnhancers = _kernel.ImageEnhancers.Where(i =>
+            {
+                try
+                {
+                    return i.Supports(item, imageType);
+                }
+                catch (Exception ex)
+                {
+                    _logger.ErrorException("Error in image enhancer: {0}", ex, i.GetType().Name);
+
+                    return false;
+                }
+
+            }).ToList();
             
             // No enhancement - don't cache
             if (supportedEnhancers.Count == 0)
@@ -609,7 +622,20 @@ namespace MediaBrowser.Controller.Drawing
 
             var dateModified = GetImageDateModified(item, imagePath);
 
-            var supportedEnhancers = _kernel.ImageEnhancers.Where(i => i.Supports(item, imageType));
+            var supportedEnhancers = _kernel.ImageEnhancers.Where(i =>
+            {
+                try
+                {
+                    return i.Supports(item, imageType);
+                }
+                catch (Exception ex)
+                {
+                    _logger.ErrorException("Error in image enhancer: {0}", ex, i.GetType().Name);
+
+                    return false;
+                }
+
+            }).ToList();
 
             return GetImageCacheTag(imagePath, dateModified, supportedEnhancers, item, imageType);
         }

MediaBrowser.Controller/Dto/DtoBuilder.cs

@@ -182,11 +182,32 @@ namespace MediaBrowser.Controller.Dto
                 return;
             }
 
-            foreach (var enhancer in Kernel.Instance.ImageEnhancers
-                .Where(i => i.Supports(item, ImageType.Primary)))
+            var supportedEnhancers = Kernel.Instance.ImageEnhancers.Where(i =>
             {
+                try
+                {
+                    return i.Supports(item, ImageType.Primary);
+                }
+                catch (Exception ex)
+                {
+                    logger.ErrorException("Error in image enhancer: {0}", ex, i.GetType().Name);
+
+                    return false;
+                }
+
+            }).ToList();
 
-                size = enhancer.GetEnhancedImageSize(item, ImageType.Primary, 0, size);
+
+            foreach (var enhancer in supportedEnhancers)
+            {
+                try
+                {
+                    size = enhancer.GetEnhancedImageSize(item, ImageType.Primary, 0, size);
+                }
+                catch (Exception ex)
+                {
+                    logger.ErrorException("Error in image enhancer: {0}", ex, enhancer.GetType().Name);
+                }
             }
 
             dto.PrimaryImageAspectRatio = size.Width / size.Height;