I was able to find the google cloud storage files I wrote to a bucket locally at:
localhost:port/_ah/gcs/bucket_name/file_suffix
Where port is by default 8080, and the file was written to: /bucket_name/file_suffix
For those trying to understand the full process of setting up a simple python GAE app and testing local writes to google cloud storage:
1. Follow the google app engine "quickstart":
https://cloud.google.com/appengine/docs/standard/python/quickstart
2. Run a local dev server with:
dev_appserver.py app.yaml
3. If using python, follow "App Engine and Google Cloud Storage Sample":
https://cloud.google.com/appengine/docs/standard/python/googlecloudstorageclient/app-engine-cloud-storage-sample
If you run into "ImportError: No module named cloudstorage" you need to create a file named appengine_config.py
touch appengine_config.py
and add to it:
from google.appengine.ext import vendor
vendor.add('lib')
GAE runs this script automatically when starting your local dev server with dev_appserver.py app.yaml, and it is necessary to run this script for GAE to find the cloudstorage library in your lib/ folder
4. "Writing a file to cloud storage" from the same tutorial:
def create_file(self, filename):
"""Create a file."""
self.response.write('Creating file {}\n'.format(filename))
# The retry_params specified in the open call will override the default
# retry params for this particular file handle.
write_retry_params = cloudstorage.RetryParams(backoff_factor=1.1)
with cloudstorage.open(
filename, 'w', content_type='text/plain', options={
'x-goog-meta-foo': 'foo', 'x-goog-meta-bar': 'bar'},
retry_params=write_retry_params) as cloudstorage_file:
cloudstorage_file.write('abcde\n')
cloudstorage_file.write('f'*1024*4 + '\n')
self.tmp_filenames_to_clean_up.append(filename)
with cloudstorage.open(
filename, 'w', content_type='text/plain', options={
'x-goog-meta-foo': 'foo', 'x-goog-meta-bar': 'bar'},
retry_params=write_retry_params) as cloudstorage_file:
cloudstorage_file.write('abcde\n')
cloudstorage_file.write('f'*1024*4 + '\n')
Where filename is /bucket_name/file_suffix
4. After calling create_file via a route in your WSGI app, your file will be available at:
localhost:port/_ah/gcs/bucket_name/file_suffix
Where port is by default 8080, and the file was written to: /bucket_name/file_suffix
Postscript
Unfortunately, I did not find either 3) or 4) in their docs, so I hope this helps someone get set up more easily in the future.
