Google Cloud Platform powers Firebase storage, allowing for versioning of files.
Within the Firebase console, there are no options related to the GCP bucket. If you access the GCP console, it may not be apparent how to enable versioning in the bucket associated with the Firebase project.
Furthermore, even if versioning is enabled, the Firebase SDK does not provide information on accessing previous versions of files.
Can versioning be implemented with Firebase Storage?
Firebase Storage is closely integrated with GCS, allowing access to many GCS features through Firebase Storage. A shared GCS bucket named <project-id>.appspot.com can be accessed via both Firebase and Cloud consoles.
To enable object versioning on your bucket, you can use the gsutil tool by running this command:
gsutil versioning set on gs://<project-id>.appspot.com
However, it's worth noting that Firebase Storage clients are only able to retrieve the most recent version of an object. This intentional limitation is due to Firebase Storage focusing on simplifying mobile development, without prioritizing comprehensive object versioning. While user data backups and document differentials could benefit from object versioning, we're open to exploring new use cases.
We expect developers to enable object versioning primarily for preventing permanent deletions, as mentioned in our deletion documentation. Developers may opt to use tools like gsutil or implement custom solutions for retrieving and restoring files as needed.
EDIT 10/1: With growing demand for these functionalities, our documentation now includes additional information on utilizing Google Cloud Platform features in our GCP Integration guide.
Once Object Versioning has been activated, you can view noncurrent object versions by accessing the list.
To retrieve a previous version of an object:
Long previousGeneration = ...;
byte[] previousContent = bucket.getStorage().get(BlobId.of(bucket.getName(), objectName, previousGeneration)).getContent();
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