How is FB accesToken generated

[SST]

GraphReaderExample.java seems to take an accessToken as an argument. How do it generate the accessToken in the first place.

I use the following code to generate an authToken by passing appId, appSecret. 

>>

    public static String getAuthTokenByAuthCode() {

        DefaultFacebookClient dfc = new DefaultFacebookClient();

        AccessToken token = dfc.obtainAppAccessToken(CLIENT_APP_ID, CLIENT_SECRET);

        String accessToken = token.getAccessToken();

        return accessToken;

    }

[Norbert Bartels]

It depends on the type of access token you want to use. 

https://developers.facebook.com/docs/facebook-login/access-tokens

Can you provide more information?

[SST]

Thanks for your reply. We are using App Access Token for getting facebook posts while public search.

[SST]

Getting the token like the following link https://smashballoon.com/custom-facebook-feed/access-token/

On Monday, April 6, 2015 at 3:35:56 PM UTC+5:30, Norbert Bartels wrote:

[Norbert Bartels]

Okay, so here some explanation of the search. It’s a bit a summary of the facebook api page:

You may search for user, page, event, group, place, placetopic and all ad-types. You cannot search for Posts (only Graph API 1.0 supports search for Post, and 1.0 is only usable until April 30, 2015)!

Using the app access token you can only search across page and place, all other types need a user access token!

[SST]

Thanks for your prompt reply Norbert!!! Then How can I get "user access token" instead of "app access token"? 

Can you provide any sample code for getting User Access Token ?

[SST]

Hi Norbert,

 

I have generated "User Access Token" using the link 

But still am getting the following error.. What did I wrong.. How do I solve this error?? 

com.restfb.exception.FacebookOAuthException: Received Facebook error response of type OAuthException: An unknown error has occurred. (code 1, subcode null)
at com.restfb.DefaultFacebookClient$DefaultGraphFacebookExceptionMapper.exceptionForTypeAndMessage(DefaultFacebookClient.java:1189)
at com.restfb.DefaultFacebookClient.throwFacebookResponseStatusExceptionIfNecessary(DefaultFacebookClient.java:1104)
at com.restfb.DefaultFacebookClient.makeRequestAndProcessResponse(DefaultFacebookClient.java:1038)
at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:951)
at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:914)
at com.restfb.DefaultFacebookClient.fetchConnection(DefaultFacebookClient.java:378)

[SST]

appreciate any inputs here

[Norbert Bartels]

Hi SST,

The link you mentioned is about obtaining a long term access token. 

Can you explain which endpoint you want to access? Perhaps this is a useful information, the error message is a bit incomplete.

Cheers

Norbert

[SST]

Hi Norbert,

    We need to fetch the public posts while search.. using the following code,

Connection<Post> messages = fbClient.fetchConnection("search",
                Post.class, Parameter.with("q", keyword),
                Parameter.with("limit", limit), Parameter.with("type", "post"));

We are  getting the access token using the following code,

 public static String getAuthTokenByAuthCode() {
        DefaultFacebookClient dfc = new DefaultFacebookClient();
        AccessToken token = dfc.obtainAppAccessToken(CLIENT_APP_ID, CLIENT_SECRET);
        String accessToken = token.getAccessToken();
        return accessToken;
    }

It throws the following error...

com.restfb.exception.FacebookOAuthException: Received Facebook error response of type OAuthException: An unknown error has occurred. (code 1, subcode null)
at com.restfb.DefaultFacebookClient$DefaultGraphFacebookExceptionMapper.exceptionForTypeAndMessage(DefaultFacebookClient.java:1189)
at com.restfb.DefaultFacebookClient.throwFacebookResponseStatusExceptionIfNecessary(DefaultFacebookClient.java:1104)
at com.restfb.DefaultFacebookClient.makeRequestAndProcessResponse(DefaultFacebookClient.java:1038)
at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:951)
at com.restfb.DefaultFacebookClient.makeRequest(DefaultFacebookClient.java:914)
at com.restfb.DefaultFacebookClient.fetchConnection(DefaultFacebookClient.java:378)

What am I missing? 

[Norbert Bartels]

With API 2.0 the search type ```post``` is not allowed, so you cannot search for public posts:

https://developers.facebook.com/docs/graph-api/using-graph-api/v2.0#search

...

[SST]

Hi Norbert,

      

         What should I use for search public posts???

...

[Norbert Bartels]

Hi,

Facebook don't want you to search for public posts, so there's nothing. A similar question had been asked yesterday or the day before in the facebook developer group.

Cheers,

Norbert

...