private async Task UploadEntry(ZipArchiveEntry entry, S3WriterResourceProperties properties)
{
// unzip entry
using (var stream = entry.Open()) {
var memoryStream = new MemoryStream();
// determine if stream needs to be encoded
string contentEncodingHeader = null;
var encoding = DetermineEncodingType(entry.FullName, properties);
switch (encoding)
{
case "NONE":
await stream.CopyToAsync(memoryStream);
break;
case "GZIP":
contentEncodingHeader = "gzip";
using (var gzipStream = new GZipStream(memoryStream, CompressionLevel.Optimal, leaveOpen: true)) {
await stream.CopyToAsync(gzipStream);
}
break;
case "BROTLI":
contentEncodingHeader = "br";
using (var brotliStream = new BrotliStream(memoryStream, CompressionLevel.Optimal, leaveOpen: true)) {
await stream.CopyToAsync(brotliStream);
}
break;
default:
_logger.LogWarn("unrecognized compression type {0} for {1}", encoding, entry.FullName);
encoding = "NONE";
goto case "NONE";
}
var base64 = GetMD5AsBase64(memoryStream);
// only upload file if new or the contents have changed
var destination = Path.Combine(properties.DestinationKey, entry.FullName).Replace('\\', '/');
_logger.LogInfo($"uploading file: {destination} [encoding: {encoding.ToLowerInvariant()}]");
await _transferUtility.UploadAsync(new TransferUtilityUploadRequest {
Headers =
{
ContentEncoding = contentEncodingHeader,
ContentMD5 = base64
},
InputStream = memoryStream,
BucketName = properties.DestinationBucket,
Key = destination
});
}
}
