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When calling BlobstoreServiceFactory.getBlobstoreService().getUploads(request) it returns blobKeys indicating the file is stored in the BlobStore.  This is a problem for me because I cannot know where in GS anything is stored from the uploader.  Consider this use case: User uploads photo, we store the blobKey (because that's all we have), and then the user delete's photo.  How can I do this if I never get access to the GS filename?  I also want to update the metadata headers on the GS file but without knowing the generated GS filename, this is impossible.

Here's code to test (in the generate URL):
UploadOptions uploadOptions = UploadOptions.Builder.withGoogleStorageBucketName("myBucket");
String uploadUrl = BlobstoreServiceFactory.getBlobstoreService().createUploadUrl("/doneUploading", uploadOptions);
               
When it comes to my callback handler, it thinks it is just in the blobStore:

Map<String, List<BlobKey>> uploads = BlobstoreServiceFactory.getBlobstoreService().getUploads(request);
        for (String key : uploads.keySet()) {
                List<BlobKey> blobKeys = uploads.get(key);
                for (BlobKey blobKey : blobKeys) {
                     AppEngineFile file = FileServiceFactory.getFileService().getBlobFile(blobKey);
 
                     // Booo, thinks it is blobStore, and there is no way to know the GS filename generated:
                     log.info(file.getFileSystem().getName());
                }
        }