From 7cf931ca2870cafd172b314b49db40a6f3c8f691 Mon Sep 17 00:00:00 2001
From: Berkan Sasmaz <berkansasmazz@gmail.com>
Date: Fri, 17 Sep 2021 16:23:03 +0300
Subject: [PATCH] fix the cover image not showing the problem on blogging
 module

---
 .../Volo/Blogging/Files/ImageFormatHelper.cs          | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/modules/blogging/src/Volo.Blogging.Application/Volo/Blogging/Files/ImageFormatHelper.cs b/modules/blogging/src/Volo.Blogging.Application/Volo/Blogging/Files/ImageFormatHelper.cs
index b69736ab34..9afa5da07f 100644
--- a/modules/blogging/src/Volo.Blogging.Application/Volo/Blogging/Files/ImageFormatHelper.cs
+++ b/modules/blogging/src/Volo.Blogging.Application/Volo/Blogging/Files/ImageFormatHelper.cs
@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.Drawing.Imaging;
 using System.IO;
+using System.Runtime.InteropServices;
 
 namespace Volo.Blogging.Areas.Blog.Helpers
 {
@@ -16,8 +17,14 @@ namespace Volo.Blogging.Areas.Blog.Helpers
 
         public static bool IsValidImage(byte[] fileBytes, ICollection<ImageFormat> validFormats)
         {
-            var imageFormat = GetImageRawFormat(fileBytes);
-            return validFormats.Contains(imageFormat);
+            // System.Drawing only works on windows => https://docs.microsoft.com/en-us/dotnet/api/system.drawing.image?view=net-5.0#remarks
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                var imageFormat = GetImageRawFormat(fileBytes);
+                return validFormats.Contains(imageFormat);
+            }
+
+            return true;
         }
     }
 }