public async Task <IActionResult> GetImageAsync(string filename, [FromServices] IMemoryCache cache)
{
try
{
var invalidChars = Path.GetInvalidFileNameChars();
if (filename.IndexOfAny(invalidChars) >= 0)
{
Logger.LogWarning($"Invalid filename attempt '{filename}'.");
return(BadRequest("invalid filename"));
}
Logger.LogTrace($"Requesting image file {filename}");
if (_cdnSettings.GetImageByCDNRedirect)
{
var imageUrl = Utils.CombineUrl(_cdnSettings.CDNEndpoint, filename);
return(Redirect(imageUrl));
}
var imageEntry = await cache.GetOrCreateAsync(filename, async entry =>
{
Logger.LogTrace($"Image file {filename} not on cache, fetching image...");
entry.SlidingExpiration = TimeSpan.FromMinutes(AppSettings.ImageCacheSlidingExpirationMinutes);
var imgBytesResponse = await _imageStorageProvider.GetAsync(filename);
return(imgBytesResponse);
});
if (imageEntry.IsSuccess)
{
return(File(imageEntry.Item.ImageBytes, imageEntry.Item.ImageContentType));
}
Logger.LogError($"Error getting image, filename: {filename}, {imageEntry.Message}");
return(_blogConfig.ContentSettings.UseFriendlyNotFoundImage
? (IActionResult)File("~/images/image-not-found.png", "image/png")
: NotFound());
}
catch (Exception e)
{
Logger.LogError(e, $"Error requesting image {filename}");
return(ServerError());
}
}
public async Task <IActionResult> GetImageAsync(string filename)
{
try
{
var invalidChars = Path.GetInvalidFileNameChars();
if (filename.IndexOfAny(invalidChars) > 0)
{
Logger.LogWarning($"Invalid filename attempt '{filename}'.");
return(BadRequest("invalid filename"));
}
Logger.LogTrace($"Requesting image file {filename}");
var imageEntry = await Cache.GetOrCreateAsync(filename, async entry =>
{
Logger.LogTrace($"Image file {filename} not on cache, fetching image...");
entry.SlidingExpiration = TimeSpan.FromMinutes(AppSettings.ImageCacheSlidingExpirationMinutes);
var imgBytesResponse = await _imageStorageProvider.GetAsync(filename);
return(imgBytesResponse);
});
if (imageEntry.IsSuccess)
{
return(File(imageEntry.Item.ImageBytes, imageEntry.Item.ImageContentType));
}
Logger.LogError($"Error getting image, filename: {filename}, {imageEntry.Message}");
return(AppSettings.UsePictureInsteadOfNotFoundResult
? (IActionResult)File("~/images/image-not-found.png", "image/png")
: NotFound());
}
catch (Exception e)
{
Logger.LogError(e, $"Error requesting image {filename}");
return(ServerError());
}
}