Blogging: Replace System.Drawing with ImageSharp package

modules/blogging/src/Volo.Blogging.Admin.Application/Volo.Blogging.Admin.Application.csproj

@@ -11,7 +11,10 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="System.Drawing.Common" Version="4.7.0" />
+        <PackageReference Include="SixLabors.ImageSharp" Version="1.0.4" />
+    </ItemGroup>
+
+    <ItemGroup>
         <ProjectReference Include="..\Volo.Blogging.Admin.Application.Contracts\Volo.Blogging.Admin.Application.Contracts.csproj" />
         <ProjectReference Include="..\Volo.Blogging.Domain\Volo.Blogging.Domain.csproj" />
         <ProjectReference Include="..\..\..\..\framework\src\Volo.Abp.AutoMapper\Volo.Abp.AutoMapper.csproj" />

modules/blogging/src/Volo.Blogging.Application/Volo.Blogging.Application.csproj

@@ -9,9 +9,12 @@
     <PackageId>Volo.Blogging.Application</PackageId>
     <RootNamespace />
   </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="SixLabors.ImageSharp" Version="1.0.4" />
+  </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Drawing.Common" Version="$(MicrosoftPackageVersion)" />
     <ProjectReference Include="..\Volo.Blogging.Application.Contracts\Volo.Blogging.Application.Contracts.csproj" />
     <ProjectReference Include="..\Volo.Blogging.Domain\Volo.Blogging.Domain.csproj" />
     <ProjectReference Include="..\..\..\..\framework\src\Volo.Abp.AutoMapper\Volo.Abp.AutoMapper.csproj" />

modules/blogging/src/Volo.Blogging.Application/Volo/Blogging/Files/FileUploadConsts.cs

@@ -1,20 +1,24 @@
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
-using System.Drawing.Imaging;
 using System.Linq;
+using SixLabors.ImageSharp.Formats;
+using SixLabors.ImageSharp.Formats.Bmp;
+using SixLabors.ImageSharp.Formats.Gif;
+using SixLabors.ImageSharp.Formats.Jpeg;
+using SixLabors.ImageSharp.Formats.Png;
 
 namespace Volo.Blogging.Files
 {
     public class FileUploadConsts
     {
-        public static readonly ICollection<ImageFormat> AllowedImageUploadFormats = new Collection<ImageFormat>
+        public static readonly ICollection<IImageFormat> AllowedImageUploadFormats = new Collection<IImageFormat>
         {
-            ImageFormat.Jpeg,
-            ImageFormat.Png,
-            ImageFormat.Gif,
-            ImageFormat.Bmp
+            JpegFormat.Instance, 
+            PngFormat.Instance, 
+            GifFormat.Instance, 
+            BmpFormat.Instance,
         };
 
-        public static string AllowedImageFormatsJoint => string.Join(",", AllowedImageUploadFormats.Select(x => x.ToString()));
+        public static string AllowedImageFormatsJoint => string.Join(",", AllowedImageUploadFormats.Select(x => x.Name));
     }
 }

modules/blogging/src/Volo.Blogging.Application/Volo/Blogging/Files/ImageFormatHelper.cs

@@ -1,27 +1,33 @@
-using System.Collections.Generic;
-using System.Drawing.Imaging;
+using System;
+using System.Collections.Generic;
 using System.IO;
-using System.Runtime.InteropServices;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Formats;
 
 namespace Volo.Blogging.Areas.Blog.Helpers
 {
     public class ImageFormatHelper
     {
-        public static ImageFormat GetImageRawFormat(Stream stream)
+        public static IImageFormat GetImageRawFormat(Stream stream)
         {
-            return System.Drawing.Image.FromStream(stream).RawFormat;
+            using (var image = Image.Load(stream, out var imageFormat))
+            {
+                return imageFormat;
+            }
         }
 
-        public static bool IsValidImage(Stream stream, ICollection<ImageFormat> validFormats)
+        public static bool IsValidImage(Stream stream, ICollection<IImageFormat> validFormats)
         {
-            // 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))
+            try
             {
                 var imageFormat = GetImageRawFormat(stream);
+
                 return validFormats.Contains(imageFormat);
             }
-
-            return true;
+            catch (Exception e)
+            {
+                return false;
+            }
         }
     }
 }