Google Cloud Platform: How can I get a signed URL for putting an object to Google Cloud Store with Python

Question

I'm using google-api-python-client but can't make any progress in how to create signed PUT URL just for direct uploading object to Google Cloud Storage Bucket. There is no consistent documentation on how I can get signed URL using the last version of the Google Python client.

Answer 1

I used the google cloud storage library. I recommend it as its supported by google and abstracts some of the complexities in the signed url dance

First get a certificate https://console.developers.google.com/

Save the certificate to your project

Install google cloud library

pip install google-cloud-storage==1.9.0

Import generate_signed_url and google.storage and then initialize storage client with the certificate and access the bucket

from google.cloud.storage._signing import generate_signed_url
from google.cloud import storage

client = storage.Client.from_service_account_json('path/to/certificate.json')

expiration = datetime.datetime.now() + datetime.timedelta(days=1)
API_ACCESS_ENDPOINT = 'https://storage.googleapis.com'
canonical_resource = bucketpath + "resource.jpeg"

url = generate_signed_url(
    client._credentials, resource=canonical_resource,
    api_access_endpoint=API_ACCESS_ENDPOINT,
    expiration=expiration, method="PUT",
    content_type="jpeg"
)
print(url)

full documentation https://googleapis.github.io/google-cloud-python/latest/storage/client.html