*** ConnectionError：尝试将文件上传到Google Cloud Storage时（“连接已中止。”，错误（13，“权限被拒绝”））

Question

I am testing my app using dev_appserver.py .

My function to upload files looks something like:

def upload_file(file_stream, filename):
    """Upload a file to Google Cloud Storage."""

    client = google.cloud.storage.client.Client(project=_GOOGLE_CLOUD_PROJECT)
    bucket = client.get_bucket(_GOOGLE_STORAGE_BUCKET)  # Here it breaks!

    blob = bucket.blob(filename)
    blob.upload_from_string(file_stream)

    url = blob.public_url

    return url

At the line bucket = client.get_bucket(_GOOGLE_STORAGE_BUCKET) I receive an error saying:

*** ConnectionError: ('Connection aborted.', error(13, 'Permission denied'))

I authenticated by doing:

gcloud auth application-default login

My app.yaml:

runtime: python27
api_version: 1
threadsafe: true

handlers:
- url: /static
  static_dir: static
  application_readable: true
- url: /.*
  script: main.app

libraries:
- name: ssl
  version: latest

Any idea how to solve?

Answer 1

It seems that you have not set the proper permissions to access your Cloud Storage bucket from the account you are using to run your app.

The bucket' permissions are set through the use of Access Control Lists (ACLs), which define which accounts can access to the bucket and the kind of access (read, write, etc.) they have.

This is an example on how to set permissions to a particular account so it can access a bucket:

gsutil acl ch -u [USER_EMAIL]:[PERMISSION] gs://[BUCKET_NAME]

There are other available options for setting ACLs, like using the Console or adding permissions through your code. You can find these options here .

UPDATE :

After doing some research and consulting with the team handling this kind of situations, I can confirm that the use of SSL with sockets is not supported on dev_appserver as of this moment. As the client library you are using is using HTTPS for connections, without this support, using dev_appserver would not work.

As an alternative, you may consider using the API client library for Python . Here you can find an example on how to use this library to connect to a Cloud Storage bucket from your app.