facebook sharing post will not update with new content

[adrianmak]

facebook share will read open graph data to display content on shared  post on facebook

When I updated existing content, and re-share the post, I found that facebook still capture the old content.

What is the problem ?

[Zeka]

You can use Facebook URL Debugger to refresh the data.

[adrianmak]

any how to make refreshing data automatically ?

For instance, when saving page, call a facebook api to refresh current page?

Is there such a facebook api ?