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| author | crupest <crupest@outlook.com> | 2021-04-27 18:52:57 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2021-04-27 18:52:57 +0800 |
| commit | 1b751781f0681a047f3d3d6097009478886ee2f5 (patch) | |
| tree | 4710ab0c761a264f090f9aa74a45e62fd39450f8 /BackEnd/Timeline/Services/Imaging/ImageService.cs | |
| parent | 6c9778b55dd8367d38280c66e0f308c5332029ed (diff) | |
| download | timeline-1b751781f0681a047f3d3d6097009478886ee2f5.tar.gz timeline-1b751781f0681a047f3d3d6097009478886ee2f5.tar.bz2 timeline-1b751781f0681a047f3d3d6097009478886ee2f5.zip | |
refactor: ...
Diffstat (limited to 'BackEnd/Timeline/Services/Imaging/ImageService.cs')
| -rw-r--r-- | BackEnd/Timeline/Services/Imaging/ImageService.cs | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/BackEnd/Timeline/Services/Imaging/ImageService.cs b/BackEnd/Timeline/Services/Imaging/ImageService.cs new file mode 100644 index 00000000..9fefe3e9 --- /dev/null +++ b/BackEnd/Timeline/Services/Imaging/ImageService.cs @@ -0,0 +1,54 @@ +using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Formats;
+using System;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Timeline.Services.Imaging
+{
+
+ public class ImageService : IImageService
+ {
+ public async Task<IImageFormat> DetectFormatAsync(byte[] data, CancellationToken cancellationToken = default)
+ {
+ if (data == null)
+ throw new ArgumentNullException(nameof(data));
+
+ var format = await Task.Run(() =>
+ {
+ var format = Image.DetectFormat(data);
+ if (format is null)
+ {
+ throw new ImageException(ImageException.ErrorReason.CantDecode, data, null, null, null);
+ }
+ return format;
+ }, cancellationToken);
+ return format;
+ }
+
+ public async Task<IImageFormat> ValidateAsync(byte[] data, string? requestType = null, bool square = false, CancellationToken cancellationToken = default)
+ {
+ if (data == null)
+ throw new ArgumentNullException(nameof(data));
+
+ var format = await Task.Run(() =>
+ {
+ try
+ {
+ using var image = Image.Load(data, out IImageFormat format);
+ if (requestType != null && !format.MimeTypes.Contains(requestType))
+ throw new ImageException(ImageException.ErrorReason.UnmatchedFormat, data, requestType, format.DefaultMimeType);
+ if (square && image.Width != image.Height)
+ throw new ImageException(ImageException.ErrorReason.BadSize, data, requestType, format.DefaultMimeType);
+ return format;
+ }
+ catch (UnknownImageFormatException e)
+ {
+ throw new ImageException(ImageException.ErrorReason.CantDecode, data, requestType, null, null, e);
+ }
+ }, cancellationToken);
+ return format;
+ }
+ }
+}
|