backup_handler.py 文件源码

def list_bucket_files(bucket_name, prefix, max_keys=1000):
  """Returns a listing of of a bucket that matches the given prefix."""
  scope = config.GoogleApiScope('devstorage.read_only')
  bucket_url = config.GsBucketURL(bucket_name)
  url = bucket_url + '?'
  query = [('max-keys', max_keys)]
  if prefix:
    query.append(('prefix', prefix))
  url += urllib.urlencode(query)
  auth_token, _ = app_identity.get_access_token(scope)
  result = urlfetch.fetch(url, method=urlfetch.GET, headers={
      'Authorization': 'OAuth %s' % auth_token,
      'x-goog-api-version': '2'})
  if result and result.status_code == 200:
    doc = xml.dom.minidom.parseString(result.content)
    return [node.childNodes[0].data for node in doc.getElementsByTagName('Key')]
  raise BackupValidationError('Request to Google Cloud Storage failed')