How to upload a bytes image on Google Cloud Storage from a Python script

Question

I want to upload an image on Google Cloud Storage from a python script. This is my code:

from oauth2client.service_account import ServiceAccountCredentials
from googleapiclient import discovery

scopes = ['https://www.googleapis.com/auth/devstorage.full_control']
credentials = ServiceAccountCredentials.from_json_keyfile_name('serviceAccount.json', scop
es)
service = discovery.build('storage','v1',credentials = credentials)

body = {'name':'my_image.jpg'}

req = service.objects().insert(
   bucket='my_bucket', body=body,
   media_body=googleapiclient.http.MediaIoBaseUpload(
      gcs_image, 'application/octet-stream'))

resp = req.execute()

if gcs_image = open('img.jpg', 'r') the code works and correctly save my image on Cloud Storage. How can I directly upload a bytes image? (for example from an OpenCV/Numpy array: gcs_image = cv2.imread('img.jpg'))

Answer 1

In my case, I wanted to upload a PDF document to Cloud Storage from bytes.

When I tried the below, it created a text file with my byte string in it.

blob.upload_from_string(bytedata)

In order to create an actual PDF file using the byte string I had to do:

blob.upload_from_string(bytedata, content_type='application/pdf')

My byte data was b64encoded, so I also had b64decode it first.