public SKData Resize(IResizableImage image, ResizeParameters resizeParameters)
{
if (resizeParameters is null)
{
return(null);
}
if (image is null)
{
return(null);
}
_image = image;
_resizeParameters = resizeParameters;
SKData imageData = null;
try
{
imageData = GetImageData();
}
catch (ArgumentException ex)
{
_logger.LogError(ex.Message);
}
return(imageData);
}
public async Task Invoke(HttpContext httpContext)
{
var path = httpContext.Request.Path.Value;
var resizeParameters = new ResizeParameters(path, httpContext.Request.Query);
if (httpContext.Request.Query.Count == 0 || !IsImagePath(path) || !resizeParameters.HasParams)
{
await _next.Invoke(httpContext);
return;
}
var cacheKey = (path.GetHashCode() + resizeParameters.ToString().GetHashCode()).ToString("X");
var cacheDirectoryName = Path.GetFileName(path).Replace(".", "");
//сведения об общей директории кэша
var cacheInfo = new PhysicalImageCacheInfo(_appConfiguration.CacheOptions);
cacheInfo.SpecCacheRoot = Path.Join(cacheInfo.CacheRoot, cacheDirectoryName);
ICustomImageCacheManager cacheManager = new PhysicalImageCacheManager(cacheInfo);
if (cacheManager.Contains(cacheKey))
{
var cachedImageBytes = await cacheManager.ReadCachedFileAsync(cacheKey);
await httpContext.Response.Body.WriteAsync(cachedImageBytes, 0, cachedImageBytes.Length);
return;
}
await using var imageStream = File.OpenRead(path);
using IResizableImage image = new ResizableImage(imageStream);
var result = _imageResizer.Resize(image, resizeParameters);
if (!(result is null))
{
_cacheController.CheckCacheState(cacheInfo);
var cachedFile = await cacheManager.CacheFileAsync(result.ToArray(), path, cacheKey);
await httpContext.Response.Body.WriteAsync(cachedFile, 0, cachedFile.Length);
}