I understand we can set Metadata for files we store in Firebase Storage.
Can we search/filter for files in Firebase Storage based on Metadata?
You can do that from Google cloud storage browser: https://console.cloud.google.com/storage/browser?project=your-firebase-project-name
There, you can search for any file name and do multiple actions on it.
Firebase SDKs now have an option to list files, though not to search them. See https://firebase.google.com/docs/storage/web/list-files
There is no way to list files, search for files or filter files within the Firebase Storage API.
There are some such features in the gcloud API, which can also be used on Firebase Storage.
You can not search with current API but if it helps you can list files https://firebase.google.com/docs/storage/web/list-files
Related
I have been searching in vain for quite some time how to delete a Firebase storage (i.e. not Firestore or Real-Time Database).
For Firestore it is possible to simply use firebase firestore delete [path]. What is the equivalent for Firebase Storage assuming want to delete an /images folder?
The Firebase CLI does not have any options for working with Cloud Storage. You will have to use the gsutil CLI instead. It has an rm command for this.
See also: Deleting a large folder from Google Cloud Storage
still new to flutter and firebase. I understand how to store and retrieve images and display it on the app.
But how do I go about synchronizing files from the app's local asset folder to an asset folder stored in firebase storage? My intention is to check the cloud folder if a new image like an icon is recently uploaded, and download it to the app's local folder. If a file is removed in the cloud storage, it should also remove it from the local assets folder, mirroring it.
I need a way to compare local AssetManifest.json to the one on firebase storage. I Just need a little direction/algorithm to start with. Thanks for the help!
There is nothing specific built into Cloud Storage's Firebase SDK for this, so you'll have to build it in your own application code.
Using only the Cloud Storage for Firebase API
If you're just using Cloud Storage, you'll have to:
List all files that you're interested in from Storage.
Loop over the files.
Get the metadata for each file and check then the files was last updated
Compare that to when you wrote the local file.
Download the file if it is new or modified.
This approach will work, but it requires quite some calls to the Storage API, because there's no specific API to give you files that were modified since a specific date/time.
Storing metadata in a cloud database
You could also consider storing the metadata in a cloud database, like Firebase's Realtime Database or Cloud Firestore, and then use the query capabilities of that database to retrieve only files that were modified since your device last synchronized.
The recipe then becomes:
Determine when we last synchronized, which is a value you'll want to store in local storage/shared preferences.
Execute a query to the database to determine which files were added/modified since then.
Loop over the query results and...
Download each file that was modified.
In here, only step 2 and 4 make calls to the external APIs, so it is likely to be faster and cheaper to execute (but more work for you to write initially).
Is there an API to get a list of files currently uploaded to Firebase Hosting? Note that I am not talking about Firebase Storage here but Firebase Hosting.
Yes. The ListFiles endpoint will list files for a specified version. Versions can be found through the ListReleases endpoint.
I'm very new to using Firebase Cloud Storage. I'm currently using it to store data generated by some in-house tablet apps. We want users to be able to easily access this data in the form of Dropbox, however don't want to integrate the Dropbox API into our tablet applications as we're already using Firebase for all login management, etc and don't want users to have to login twice.
Is it possible to setup of a mirror between Firebase Cloud Storage and a Dropbox account such that any file added to Firebase Cloud Storage is immediately copied to the Dropbox directory?
You can simply use cloud functions which are being triggered by cloud storage service (it will triggered on any uploading, updating, deleting files or folders) on your firebase project and then write your cloud functions in a way to use dropbox api and then make the same change in the dropbox directory structure.
Cost and performance wise I don't think it would an efficient thing to do, unless it is what really you want.
I have a long list of files in Firebase Storage, which I have uploaded from a python script.
Many of those files have this kind of names:
foo_8346gr.msb
foo_8333ys.msb
foo_134as.mbb
...
I know there is no programmatic way to delete a folder in Storage (they are not even folders), but how could I remove all files starting with "foo_" programmatically, from python?
You can use Cloud Storage List API to find all files with a certain prefix, then delete them. That page has code samples for a variety of languages, including Python. Here's how you list files with a prefix:
storage_client = storage.Client()
bucket = storage_client.get_bucket(bucket_name)
blobs = bucket.list_blobs(prefix=prefix, delimiter=delimiter)
print('Blobs:')
for blob in blobs:
print(blob.name)
if delimiter:
print('Prefixes:')
for prefix in blobs.prefixes:
print(prefix)
You will have to add the bit of code that deletes the file if you believe it should be deleted. The documentation goes into more detail about the List API.
Firebase provides a wrapper around Cloud Storage that allows you to directly access the files in storage from the client, and that secures access to those files. Firebase does not provide a Python SDK for accessing these files, but since it is built around Google Cloud Storage, you can use the GCP SDK for Python to do so.
There is no API to do a wildcard delete in there, but you can simply list all files with a specific prefix, and then delete them one by one. For an example of this, see the answer here: How to delete GCS folder from Python?