Retrieve Public Facebook Posts with App ID and App Secret - facebook

Question

I have a Facebook app that is associated with a companys page. The page has public posts on it and I would like to retrieve those posts (and eventually images etc) via the spring-social-facebook plugin for spring-boot.
I am able to retrieve the Page object without authenticating as a specific FB user, but how can I get the public information (such as the wall posts, images uploaded etc) associated with the company?
Page page = facebook.pageOperations().getPage("1234567");
List<Post> posts = facebook.feedOperations().getFeed();
model.addAttribute("page", page);
model.addAttribute("posts", posts);
return "hello";
I am able to access the page object (${page.category}), but when I try to get their posts I get the following exception:
org.springframework.social.MissingAuthorizationException: Authorization is required for the operation, but the API binding was created without authorization.
My goal is to create REST services for this specific company to use to populate a read-only front end with its own public FB data without requiring any end user authentication with Facebook.
Thank you!

Answer 1

According to the Page Documentation, to fetch the posts-
An app or user access token is needed to view fields from fully public pages.
A user access token is needed to view fields from restricted pages that this person is able to view (such as those restrict to certain demographics like location or age, or those only viewable by Page admins).
A page access token can also be used to view those restricted fields.
To get the posts from a public page without user authentication, you can use the app access token(app_id|app_secret) (expires never).
But please note its not safe to expose the app access token to the client side because it is kind of a password to your app.