public async Task ZipIt([ActivityTrigger] BlobModel input, Binder binder)
{
SemaphoreSlim semaphore = GetSemaphoreForContainer(input.Analysis.Category);
await semaphore.WaitAsync();
try
{
string name = $"{input.Analysis.Category}.zip";
using Stream zipStream = await binder.BindAsync <Stream>(FunctionUtils.GetBindingAttributes("zip-collection", name));
using var archive = new ZipArchive(zipStream, ZipArchiveMode.Create, true);
BlobContainerClient containerClient = GetCloudBlobContainer(input.Analysis.Category);
containerClient.DeleteBlobIfExists(name);
Pageable <BlobItem> blobs = containerClient.GetBlobs();
foreach (BlobItem blob in blobs)
{
BlobClient client = containerClient.GetBlobClient(blob.Name);
using var blobStream = new MemoryStream();
client.DownloadTo(blobStream);
using Stream entryStream = archive.CreateEntry(blob.Name).Open();
blobStream.Seek(0, SeekOrigin.Begin);
blobStream.CopyTo(entryStream);
}
}
finally
{
semaphore.Release();
}
}
public async Task Upload([ActivityTrigger] BlobModel input, Binder binder)
{
// Use a binder to dynamically set the binding output path
using Stream fileOutputStream = await binder.BindAsync <Stream>(FunctionUtils.GetBindingAttributes(input.Analysis.Category, input.Name));
await fileOutputStream.WriteAsync(input.Blob, 0, input.Blob.Length);
}
public async Task CreateThumbnail([ActivityTrigger] BlobModel input, Binder binder)
{
using Stream thumbnail = await binder.BindAsync <Stream>(FunctionUtils.GetBindingAttributes($"{input.Analysis.Category}-thumbs", input.Name));
using Image <Rgba32> image = Image.Load(input.Blob);
image.Mutate(i =>
{
i.Resize(340, 0);
int height = i.GetCurrentSize().Height;
i.Crop(new Rectangle(0, 0, 340, height < 226 ? height : 226));
});
image.SaveAsJpeg(thumbnail);
}
