Two newbie questions

[Mark Conder]

First, thank you for the great library, it has helped me a lot.

I have a java app that I want the user to be able to post to my facebook pages.

Question 1: I can successfully connect and post to my FB page using an access token.But when I try to use my app token, I get the following error:

[Sat Jan 25 13:17:18 CST 2014]Request: 

[Sat Jan 25 13:17:18 CST 2014]POST https://graph.facebook.com/me/feed

[Sat Jan 25 13:17:18 CST 2014]Accept-Encoding: gzip

[Sat Jan 25 13:17:18 CST 2014]User-Agent: facebook4j http://facebook4j.org/ /2.0.4

[Sat Jan 25 13:17:18 CST 2014]Post Params: message=Hello%20World%20from%20Facebook4J.&access_token=6...U

[Sat Jan 25 13:17:19 CST 2014]Response: 

[Sat Jan 25 13:17:19 CST 2014]HTTP/1.1 400 Bad Request

[Sat Jan 25 13:17:19 CST 2014]X-FB-Debug: /dzL/xNB/x3Vj0IQgoJvPzL+ykpjxCoTkOEttumIUyQ=

[Sat Jan 25 13:17:19 CST 2014]WWW-Authenticate: OAuth "Facebook Platform" "invalid_request" "An active access token must be used to query information about the current user."

[Sat Jan 25 13:17:19 CST 2014]Date: Sat, 25 Jan 2014 19:17:19 GMT

[Sat Jan 25 13:17:19 CST 2014]Access-Control-Allow-Origin: *

[Sat Jan 25 13:17:19 CST 2014]Content-Length: 140

[Sat Jan 25 13:17:19 CST 2014]Expires: Sat, 01 Jan 2000 00:00:00 GMT

[Sat Jan 25 13:17:19 CST 2014]Connection: keep-alive

[Sat Jan 25 13:17:19 CST 2014]X-FB-Rev: 1095454

[Sat Jan 25 13:17:19 CST 2014]Content-Type: application/json; charset=UTF-8

[Sat Jan 25 13:17:19 CST 2014]Pragma: no-cache

[Sat Jan 25 13:17:19 CST 2014]Cache-Control: no-store

[Sat Jan 25 13:17:19 CST 2014]{"error":{"message":"An active access token must be used to query information about the current user.","type":"OAuthException","code":2500}}

FacebookException{statusCode=400, response=HttpResponse{statusCode=400, responseAsString='{"error":{"message":"An active access token must be used to query information about the current user.","type":"OAuthException","code":2500}}

', is=sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@28cb43a9, streamConsumed=true}, errorType='OAuthException', errorMessage='An active access token must be used to query information about the current user.', errorCode=2500, errorSubcode=-1}

at facebook4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:189)

I am using the following code:

Facebook facebook = new FacebookFactory().getInstance();

try { facebook.postStatusMessage("Hello World from Facebook4J.");

And oauth.accessToken ikn facebook4j.properties references my app token.

I want to use a app token so that it is permanent. What am I doing wrong?

Question 2: I can only post to my default FB page. How to I specify one of my other pages to post to? I think I need to find the page_ID in graph explorer, but once I find it how do I use it in facebook4j?

Thanks,

Mark

[Mark Conder]

My new code:

Facebook facebook = new FacebookFactory().getInstance();

   PostUpdate post = null;

   try {

      post = new PostUpdate(new URL("http://facebook4j.org"))

         .picture(new URL("http://facebook4j.org/images/hero.png"))

         .name("test")

         .caption("another test")

         .description("this is a test");

   } catch (MalformedURLException e2) {

   // TODO Auto-generated catch block

      e2.printStackTrace();

   }

   try {

//    facebook.postStatusMessage("Hello World from Facebook4J.");

      facebook.postFeed("page_id or user_id",post);

   } catch (FacebookException e1) {

   // TODO Auto-generated catch block

      e1.printStackTrace();

   }

This posts fine if I use my personal user_id. But if, I try to use my other user_id or page_id, it does not work (no errors, just doesn't post)

[Ryuji Yamashita]

Hi,

Thanks for using Facebook4J.

Question 1)

You cannot publish a post to a page using app access token.

A page access token with publish_actions permission is required.

see https://developers.facebook.com/docs/graph-api/reference/page/feed/#publish

You can get the page access token as follows:

http://facebook4j.org/en/code-examples.html#getting-page-access-token

Question 2)

You can find your page ids via Facebook#getAccounts() method.

http://facebook4j.org/en/api-support.html#account

Best,

2014年1月26日日曜日 4時24分24秒 UTC+9 Mark Conder:

[Mark Conder]

Thanks for your reply. With your help I was able to find my page IDs, and can post when I get a page access token manually from graph explorer. But I am missing one thing for my program, I don't know how to get my page access token without first logging in - and I can't get an Facebook instance without the OAuthAccessToken.  Here is my code - it gives me a responseAsString='{"error":{"message":"Unsupported get request.","type":"GraphMethodException","code":100}} error.

   public void actionPerformed(ActionEvent e) {

    if(e.getSource()==btnPostToFB) {

    ConfigurationBuilder cb = new ConfigurationBuilder();

    cb.setDebugEnabled(true)

    .setOAuthAppId("1***")

    .setOAuthAppSecret("9***")

                                 .setOAuthAccessToken("C***")

    .setOAuthPermissions("email,publish_stream,manage_pages");

    FacebookFactory ff = new FacebookFactory(cb.build());

    Facebook facebook = ff.getInstance();

   ResponseList<Account> accounts = null;

try {

accounts = facebook.getAccounts("1***");

} catch (FacebookException e3) {

// TODO Auto-generated catch block

e3.printStackTrace();

}

    Account yourPageAccount = accounts.get(0);  // if index 0 is your page account.

    String pageAccessToken = yourPageAccount.getAccessToken();

   facebook.setOAuthAccessToken(new AccessToken(pageAccessToken, null));

    PostUpdate post = null;

try {

post = new PostUpdate(new URL("http://facebook4j.org"))

   .picture(new URL("http://facebook4j.org/images/hero.png"))

   .name("test")

   .caption("another test")

   .description("this is a just a test");

} catch (MalformedURLException e2) {

// TODO Auto-generated catch block

e2.printStackTrace();

}

      try {

// facebook.postStatusMessage("Hello World from Facebook4J.");

    facebook.postFeed("107246956023241",post);

  } catch (FacebookException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

  }

       }

      }

Do I need to get a User Access token first? If I remove the user access token from .setOAuthAccessToken in the configuration builder then I get a credentials error.