Access Google Cloud Storage From External Server (Python)

Libraries

pip install --upgrade google-cloud-storage

or edit requirements.txt

# https://pypi.org/project/google-cloud-storage/
google-cloud-storage==1.16.1

Create Service Account

Option 1: Download App Engine default service account

Access Google Cloud Console -> Service accounts.

Select [email protected] / App Engine default service account, click on the 3-vertical dots of Actions and select Create key. Select JSON for Key type the click Create. Save the JSON file PROJECT_ID-appengine.json.

NOTE: This key have access to all App Engine resources, so be extra careful with it.

Option 2: Create Cloud Storage only service account key

Access Google Cloud Console -> Create service account key

Service account: New service account
Service account name: storage
Role: Storage -> Storage Admin or Storage Object Admin or Storage Object Creator
Key type: JSON

Click create. Save the JSON file PROJECT_ID-storage.json.

Option 3: Project Owner key

Assuming you want to use the same key for all google cloud resources (App Engine, Cloud Functions, Datastore, Storage, etc.)

Access Google Cloud Console -> Create service account key

Service account: New service account
Service account name: owner
Role: Project -> Owner
Key type: JSON

Click create. Save the JSON file PROJECT_ID-owner.json.

Python Storage

from google.cloud import storagedef init_storage():    # export GOOGLE_APPLICATION_CREDENTIALS="/home/user/Downloads/[FILE_NAME].json"    # os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = "/home/user/Downloads/[FILE_NAME].json"    # return storage.Client()    return storage.Client.from_service_account_json('keys/PROJECT_ID-storage.json')storage_client = init_storage()# list bucketsfor bucket in storage_client.list_buckets():    print(bucket)# write to bucketBUCKET_NAME = '...'# check bucket at https://console.cloud.google.com/storage/browserbucket = storage_client.get_bucket('BUCKET_NAME')filename = "DIRECTORY_NAME/FILENAME"blob = bucket.blob(filename)# blob.upload_from_string('Hello World', content_type='text/plain', predefined_acl='publicRead')blob.upload_from_string('Hello World')

References