Post to Facebook Page wall using RestFB api

Question

I am trying to post on the wall of a facebook page. I am able to post on the user wall using App Access token.

I got the App Access Token through extending the DefaultFacebookClient

public class ConnectionService extends DefaultFacebookClient{

public ConnectionService(String appId, String appSecret) {
    AccessToken accessToken = this.obtainAppAccessToken(appId, appSecret);
    this.accessToken = accessToken.getAccessToken();
}
}

With this I am able to post to user wall using the appID and appSecret. But when I tried to post to Page Wall i get error of " The user hasn't authorized the application to perform this action"

Anyone can advice?

Answer 1

The App Access Token is the most basic one, and will not allow you to post anything. In order to post something to a Facebook Page (as a Page), you need to get a Page Access Token.

The process is a bit complicated, because you actually need to authorize the user with the "manage_pages" permission first, with the User Access Token you can call the API to get a Page Access Token (/me/accounts).

See those links:

• https://developers.facebook.com/docs/facebook-login/
• https://developers.facebook.com/docs/facebook-login/access-tokens/
• http://www.devils-heaven.com/facebook-access-tokens/

Btw, the REST API is deprecated: https://developers.facebook.com/blog/post/616/

You can also try the "Client Token" (Developer Settings > Advanced), i never worked with that one but it could be the easiest solution. In any case, an App Access Token is the wrong one.

Answer 2

To post on a facebook page wall, you will need to follow these steps:

1. Head over to https://developers.facebook.com/tools/explorer
2. Click on "Get Access Token"
3. Under "Extended Permissions" tab, select select manage_pages and publish_actions and hit "Get Access Token"
4. Now under Graph API, under Get call, type in "me/accounts" and hit Submit
5. In the screen below, you will see the "data" json object with all your pages and page access tokens.
6. Grab the desired page token access and replace the PAGE_ACCESS_TOKEN in the code below with this token.
7. Replace PAGE_NAME with your page name (the page name slug in the URL).
8. Run the below code and that should do the job :)

final FacebookClient fb = new DefaultFacebookClient(PAGE_ACCESS_TOKEN); final Page page = facebookClient.fetchObject(PAGE_NAME, Page.class); facebookClient.publish("PAGE_NAME/feed", FacebookType.class, Parameter.with("message", "RestFB test"));

Answer 3

Make sure that the scopes you mentioned while authenticating user includes manage_pages also. This error occurs when you have not included this in your scope. Refer this

Answer 4

Since u r generating access token from java class. u can set the permissions u require from user in ur manage app link from ur facebook profile page and get the access token here.....