How to view files uploaded to Google Drive and not download it?
Before you can do this, Please ensure that files uploaded to Google Drive and shared as "Public on the web”, Now to ensure that you can only view files (rather than download them) user following URL structure
https://drive.google.com/uc?export=view&id={fileId}
so simply replace the file id and the URL will look something like below:
https://drive.google.com/uc?export=view&id=0BwD6TMbkbwgDT3NjeERJYWtNb0U
https://drive.google.com/uc?export=view&id=0BwD6TMbkbwgDZldVVEZGSmY1bk0