Does Facebook support the upload name and data keys for a user publish action?
- I tried base64 encoding the image in the data field as I want to have Facebook display the a larger image in the shared post than they do by default when simply sharing a link that FB then extracts meta metadata from directly.
- I also tried sending a picture URL, but it does not seem to change the way a FB post is displayed.
- Is there a list somewhere of the key/value pairs supported for each provider? (FB, Twitter, LinkedIn)
FYI, the base64 data string is here: https://pastebin.com/7AEKMHyn
(I made sure it renders in the browser)