public IHttpActionResult Delete(string id)
{
Log.Information($"Deleting file {id}.");
var descriptor = _repository.LoadObject <FileDescriptor>(id);
if (descriptor == null)
{
Log.Information($"File {id} not found.");
return(Ok()); // DELETE is indempotent
}
_repository.Delete(descriptor.ProcessingInfoId);
_repository.DeleteStream(descriptor.BlobId);
_repository.Delete(id);
Log.Information($"File {id} deleted.");
return(Ok());
}
public void ProcessImage(SourceFileUploadedMessage message)
{
string extension = Path.GetExtension(message.SourceFileName);
if (!FileRasterizer.Supports(extension))
{
var error = $"Unsupported file type {extension}";
new ProcessingInfo
{
FileDescriptorId = message.ImageDescriptorId,
ProcessingError = error
}.SaveTo(_repository);
Log.Information(error);
return;
}
var format = _options.ImageFormat.ParseImageFormat();
var imageBlobId = Guid.NewGuid().Encode();
var imageFileName = $"{imageBlobId}.{format}";
var rasterizer = new FileRasterizer();
var sourceTempFilePath = Path.Combine(Environment.CurrentDirectory, Guid.NewGuid().Encode());
try
{
using (var sourceStream = File.Create(sourceTempFilePath))
{
Log.Information($"Loading source {message.SourceDescriptorId}");
_repository.LoadStream(message.SourceBlobId, sourceStream);
Log.Information($"Rasterizing source {message.SourceDescriptorId}");
sourceStream.Position = 0;
var image = rasterizer.Rasterize(sourceStream, extension);
image = image.Scale(message.ImageSize.Width, message.ImageSize.Height);
Log.Information($"Saving image file {message.ImageDescriptorId} as {format}");
using (var imageStream = new MemoryStream())
{
var imageData = image.Convert(format);
imageStream.Write(imageData, 0, imageData.Length);
_repository.SaveStream(imageBlobId, imageStream);
new FileDescriptor
{
DescriptorId = message.ImageDescriptorId,
FileName = imageFileName,
BlobId = imageBlobId
}.SaveTo(_repository);
_repository.SetExpiration(message.ImageDescriptorId, message.SourceExpiry);
_repository.SetStreamExpiration(imageBlobId, message.SourceExpiry);
_repository.Delete(message.ProcessingInfoId);
}
Log.Information($"Image {message.ImageDescriptorId} processed");
}
}
catch (Exception ex)
{
var error = $"Processing exception for source {message.SourceDescriptorId}: {ex.ToString()}";
new ProcessingInfo
{
FileDescriptorId = message.ImageDescriptorId,
ProcessingError = error
}.SaveTo(_repository);
Log.Information(error);
}
finally
{
if (File.Exists(sourceTempFilePath))
{
File.Delete(sourceTempFilePath);
}
}
}
