It is possible that src param is of type blob or file for view.officeapps.live.com?

[ionracu]

Hello,

I try to build an "attachment viewer" and for office types I use 

https://view.officeapps.live.com/op/embed.aspx?src=`${fileUrl}`

- Is it possible to use a file or blob instead of a public URL of the file?

- If it is impossible to use a file or blob, how could I make this URL much more secure?

Great thanks!