I want to detect text in PDF and TIFF files with Google Cloud Vision, but from the looks of it that can only be done if you first store the file to the Google Cloud Storage. Can this also be done without storing it in the cloud?
Currently, you need to store the content in a Google Cloud Storage Bucket. However, there's a feature request to read PDF files without having to be stored in the bucket. I suggest starring this issue and put a comment to indicate this could help you with your current scenario.