How to serve cloudstorage files using app engine SDK

Question

In app engine I can serve cloudstorage files like a pdf using the default bucket of my application:

http://storage.googleapis.com/.appspot.com/&         


        

Answer 1

This is the value that you see in the Development mode from app_identity_stub.py:

APP_DEFAULT_GCS_BUCKET_NAME = 'app_default_bucket'

The comments in this file explain it:

This service behaves the same as the production service, except using constant values instead of app-specific values

You should get the correct URL in your production code.

EDIT:

This is from the support forum:

In development mode, the app engine tools simulate Google Cloud Storage services locally. Objects in that simulated environment are non-persistent so your app is failing because the desired object doesn't exist in the local store. If you first create (and optionally write to) the object you're trying to read, it should work fine in dev mode (it did for me). Of course, objects in the production service are persistent so there's no need for that extra step when running your app in production mode (assuming the object already exists).

Hope that helps,

Marc Google Cloud Storage Team

This means you have to write a file first, then you can use it. If I understand correctly, you can use any bucket name for this purpose, including 'app_default_bucket'.