Bug Report: Exception when calling .upload_from_string()

[ShwetanshuSingh]

Bug similar to #663

Environment details

• OS: Debian GNU/Linux 10 (buster)
• Python version: 3.7.3
• pip version: 21.1.3
• google-auth version: 1.33.1

Steps to reproduce

1. Running the following function:

def create_folder(bucket_name, destination_blob_name):
    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(destination_blob_name)

    blob.upload_from_string('', content_type='application/x-www-form-urlencoded;charset=UTF-8')

results in the traceback:

    blob.upload_from_string('', content_type='application/x-www-form-urlencoded;charset=UTF-8')
  File "/path/to/lib/python3.7/site-packages/google/cloud/storage/blob.py", line 2858, in upload_from_string
    retry=retry,
  File "/path/to/lib/python3.7/site-packages/google/cloud/storage/blob.py", line 2585, in upload_from_file
    retry=retry,
  File "/path/to/lib/python3.7/site-packages/google/cloud/storage/blob.py", line 2387, in _do_upload
    retry=retry,
  File "/path/to/lib/python3.7/site-packages/google/cloud/storage/blob.py", line 1908, in _do_multipart_upload
    transport, data, object_metadata, content_type, timeout=timeout
  File "/path/to/lib/python3.7/site-packages/google/resumable_media/requests/upload.py", line 146, in transmit
    timeout=timeout,
  File "/path/to/lib/python3.7/site-packages/google/resumable_media/requests/_request_helpers.py", line 136, in http_request
    return _helpers.wait_and_retry(func, RequestsMixin._get_status_code, retry_strategy)
  File "/path/to/lib/python3.7/site-packages/google/resumable_media/_helpers.py", line 177, in wait_and_retry
    response = func()
  File "/path/to/lib/python3.7/site-packages/google/auth/transport/requests.py", line 476, in request
    self.credentials.before_request(auth_request, method, url, request_headers)
  File "/path/to/lib/python3.7/site-packages/google/auth/credentials.py", line 133, in before_request
    self.refresh(request)
  File "/path/to/lib/python3.7/site-packages/google/auth/compute_engine/credentials.py", line 111, in refresh
    self._retrieve_info(request)
  File "/path/to/lib/python3.7/site-packages/google/auth/compute_engine/credentials.py", line 91, in _retrieve_info
    self._service_account_email = info["email"]
TypeError: string indices must be integers

Thanks!

[busunkim96]

Hi @ShwetanshuSingh,

Apologies for the late response. I see the code seems to be failing in compute_engine/credentials.py. Could you share what environment the code was being run in? Were you in a Google environment like Compute Engine, App Engine, or Functions?

[tseaver]

@ShwetanshuSingh The traceback indicates that info is a string, rather than the expected dict. Digging down, _metadata.get_service_account_info calls _metadata.get, which only returns a string if the metadata server returns a non-JSON response (which should never happen).

[arithmetic1728]

please provide more information if the problem persists, thanks.