treat 0 byte uploads as size deferred

Signed-off-by: Jörn Friedrich Dreyer <[email protected]>

pkg/storage/utils/decomposedfs/upload.go

@@ -62,6 +62,7 @@ var _idRegexp = regexp.MustCompile(".*/([^/]+).info")
 // It creates a node for new files to persist the fileid for the new child.
 // TODO read optional content for small files in this request
 // TODO InitiateUpload (and Upload) needs a way to receive the expected checksum. Maybe in metadata as 'checksum' => 'sha1 aeosvp45w5xaeoe' = lowercase, space separated?
+// TODO needs a way to handle unknown filesize, currently uses the context
 // FIXME metadata is actually used to carry all kinds of headers
 func (fs *Decomposedfs) InitiateUpload(ctx context.Context, ref *provider.Reference, uploadLength int64, headers map[string]string) (map[string]string, error) {
 	log := appctx.GetLogger(ctx)
@@ -156,9 +157,16 @@ func (fs *Decomposedfs) InitiateUpload(ctx context.Context, ref *provider.Refere
 
 	usr := ctxpkg.ContextMustGetUser(ctx)
 
+	// treat 0 length uploads as deferred
+	sizeIsDeferred := false
+	if uploadLength == 0 {
+		sizeIsDeferred = true
+	}
+
 	info := tusd.FileInfo{
-		MetaData: tusMetadata,
-		Size:     uploadLength,
+		MetaData:       tusMetadata,
+		Size:           uploadLength,
+		SizeIsDeferred: sizeIsDeferred,
 	}
 	if lockID, ok := ctxpkg.ContextGetLockID(ctx); ok {
 		info.MetaData[tus.CS3Prefix+"lockid"] = lockID
@@ -460,7 +468,7 @@ func (fs *Decomposedfs) Upload(ctx context.Context, ref *provider.Reference, r i
 		return provider.ResourceInfo{}, errors.Wrap(err, "Decomposedfs: error writing to binary file")
 	}
 
-	if chunked {
+	if chunked || uploadInfo.SizeIsDeferred {
 		// update the size
 		uploadInfo.Size = bytesWritten
 	}