synchronized SmbFileHandleImpl ensureOpen () throws CIFSException {
        // ensure file is open
        if ( this.handle == null || !this.handle.isValid() ) {
            // one extra acquire to keep this open till the stream is released
            this.handle = this.file.openUnshared(this.openFlags, this.access, this.sharing, SmbConstants.ATTR_NORMAL, this.options).acquire();
            return this.handle;
        }

	case authTypeStreamingSigned, authTypeStreamingSignedTrailer:
		// Initialize stream signature verifier.
		rd, s3Err = newSignV4ChunkedReader(r, rAuthType == authTypeStreamingSignedTrailer)
		if s3Err != ErrNone {
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Err), r.URL)
			return
		}
	case authTypeStreamingUnsignedTrailer:
		// Initialize stream chunked reader with optional trailers.

			return nil, err
		}
	}

	// Set content-type to default value if it is not set.
	if _, ok := metadata[strings.ToLower(xhttp.ContentType)]; !ok {
		metadata[strings.ToLower(xhttp.ContentType)] = "binary/octet-stream"
	}

	// https://github.com/google/security-research/security/advisories/GHSA-76wf-9vgp-pj7w
	for k := range metadata {
		if equals(k, xhttp.AmzMetaUnencryptedContentLength, xhttp.AmzMetaUnencryptedContentMD5) {

	}

	if isTruncated {
		listObjectsInfo.IsTruncated = true
		listObjectsInfo.NextContinuationToken = nextToken
	}

	return listObjectsInfo, nil
}

// getFilesFromZIPObject reads a partial stream of a zip file to build the zipindex.Files index
func getFilesListFromZIPObject(ctx context.Context, objectAPI ObjectLayer, bucket, object string, opts ObjectOptions) (zipindex.Files, ObjectInfo, error) {
	size := 1 << 20

    private val responseHeaders: Headers
    private val handshake: Handshake?
    private val sentRequestMillis: Long
    private val receivedResponseMillis: Long

    /**
     * Reads an entry from an input stream. A typical entry looks like this:
     *
     * ```
     * http://google.com/foo
     * GET
     * 2
     * Accept-Language: fr-CA
     * Accept-Charset: UTF-8
     * HTTP/1.1 200 OK
     * 3

import java.util.TreeMap;
import java.util.function.BiConsumer;
import java.util.function.BinaryOperator;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.Collectors;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**

	case authTypeStreamingSigned, authTypeStreamingSignedTrailer:
		// Initialize stream signature verifier.
		reader, s3Error = newSignV4ChunkedReader(r, rAuthType == authTypeStreamingSignedTrailer)
		if s3Error != ErrNone {
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
			return
		}
	case authTypeStreamingUnsignedTrailer:
		// Initialize stream signature verifier.
		reader, s3Error = newUnsignedV4ChunkedReader(r, true)

     * actually purer. However, in the case of smb we know the
     * wordCount and byteCount. And since every subclass of
     * ServerMessageBlock would have to perform the same read
     * operation on the input stream, we might as will pull that
     * common functionality into the superclass and read wordCount
     * and byteCount worth of data.
     * 
     * We will still use the readXxxWireFormat return values to

		// https://en.wikipedia.org/wiki/Copy_protection so the incoming stream
		// is always going to be in-memory as we cannot re-read from what we
		// wrote to disk - since that amounts to "copying" from a "copy"
		// instead of "copying" from source, we need the stream to be seekable
		// to ensure that we can make fan-out calls concurrently.
		buf := bytebufferpool.Get()

	LifecycleAuditEvent lcAuditEvent

	WantChecksum *hash.Checksum // x-amz-checksum-XXX checksum sent to PutObject/ CompleteMultipartUpload.

	NoDecryption                        bool      // indicates if the stream must be decrypted.
	PreserveETag                        string    // preserves this etag during a PUT call.
	NoLock                              bool      // indicates to lower layers if the caller is expecting to hold locks.