public IActionResult Get(string file, int width, int height, string backgroundColour = null,
string watermark = null, string fileType = "png")
{
try
{
var criteriaBuilder = ImageCriteria.NewBuilder()
.SetSize(width, height)
.SetImageFormat(ParseFormat(fileType));
if (backgroundColour != null)
{
criteriaBuilder.SetBackgroundColour(backgroundColour);
}
if (watermark != null)
{
criteriaBuilder.SetWatermark(watermark);
}
var criteria = criteriaBuilder.Build(file);
var imageBytes = _imageFetcher.Fetch(criteria);
return(File(imageBytes, criteria.Format.MimeType()));
} catch (ArgumentException ex)
{
return(BadRequest(new { errorMessage = ex.Message }));
} catch (Exception ex)
{
_logger.LogError("Failed to fetch image " + ex.Message);
return(StatusCode(500));
}
}
public byte[] Fetch(ImageCriteria criteria)
{
var value = _cache.Get <byte[]>(criteria.ToHash());
if (value == null)
{
var image = _source.Fetch(criteria);
_cache.Set(criteria.ToHash(), image, new MemoryCacheEntryOptions()
{
Size = image.Length
});
return(image);
}
return(value);
}
