如何从Google App Engine读取Google云存储文件

Question

runtime: python
env: flex
entrypoint: gunicorn -b :$PORT view:app
runtime_config:
  python_version: 3.5
env_variables:
    CLOUD_STORAGE_BUCKET: <project-xxxx>

...
from google.cloud import storage 
gcs = storage.Client()

@app.route('/start_serving/<file_name>')
def start(file_name):
    WHAT TO DO HERE?

#Rest of the app

提前谢谢你。我在文件中找不到任何相关的东西。它提供了关于如何创建bucket、如何上传、如何下载、如何授予权限的信息，但没有关于如何读取它的信息。

此外，我如何从我的计算机打开它（在运行'GCloud app deploy'命令之前）？

Answer 1

from google.cloud import storage

project_id = os.environ['GCLOUD_PROJECT']
CLOUD_STORAGE_BUCKET = "%s.appspot.com" % project_id

@app.route('/start_serving/<file_name>')
def start(file_name):
    gcs = storage.Client()
    bucket = gcs.get_bucket(CLOUD_STORAGE_BUCKET)
    blob = bucket.blob(file_name)
    return blob.download_as_string()