Question

我正在开发一款Android应用。随着Facebook的offline_access权限即将被弃用，我试图使用Graph API来扩展Facebook令牌。

        https://graph.facebook.com/oauth/access_token?             
        client_id=APP_ID&
        client_secret=APP_SECRET&
        grant_type=fb_exchange_token&
        fb_exchange_token=EXISTING_ACCESS_TOKEN

任何人都可以提供详细的代码，演示如何在Android应用程序中实现上述代码并获取刷新的Facebook令牌吗？

感谢您的时间。

更新二：

进步（我认为）！

使用带有facebook请求方法的完整URL会导致将基本URL添加到URL的开头而不是

String refreshUrl = "https://graph.facebook.com/oauth/access_token?client_id=12345678910&client_secret=abcdefghijklmnopqrstuvwxyz&grant_type=fb_exchange_token&fb_exchange_token="+currentAccessToken;

应该使用

String refreshUrl = "oauth/access_token?client_id=12345678910&client_secret=abcdefghijklmnopqrstuvwxyz&grant_type=fb_exchange_token&fb_exchange_token="+currentAccessToken;

但是我现在收到响应{“error”：{“message”：“验证应用程序时出错。应用程序ID无效。”，“类型”：“OAuthException”，“code”：190}}

更新一次：

这是我尝试过的。代码完成，即listerner上的OnComplete被调用，但响应不包含新的访问令牌或到期值。

    void refreshWithGraph() {
        AsyncFacebookRunner extendingAsyncRunner = new AsyncFacebookRunner(facebook);
        Bundle parameters = new Bundle();

        //the variable currentAccessToken is obtained after authorisation is complete using currentAccessToken = facebook.getAccessToken();

        String refreshUrl = "https://graph.facebook.com/oauth/access_token?client_id=12345678910&client_secret=abcdefghijklmnopqrstuvwxyz&grant_type=fb_exchange_token&fb_exchange_token="+currentAccessToken;


    extendingAsyncRunner.request(refreshUrl, parameters, new RefreshListener(), null );
   }

这是我的RefreshListener版本......

  //REFRESH LISTENER
    public class RefreshListener extends BaseRequestListener {

        public void onComplete(final String response, Object state) {


            try {
               final JSONObject json = Util.parseJson(response);

                runOnUiThread(new Runnable() {

                    @Override
                    public void run() {             
                        tvRefreshResponse.setText("IN REFRESH LISTENER ONCOMPLETE\nResponse is " + response);
                        tvRefreshToken.setText("IN REFRESH LISTENER ONCOMPLETE\nToken is " + facebook.getAccessToken());
                        tvRefreshExpiry.setText("IN REFRESH LISTENER ONCOMPLETE\nFacebook expiry is " + millisecToDate(facebook.getAccessExpires()));

                    }

                }); //end runOnUiThread



            } catch (JSONException e) {
                runOnUiThread(new Runnable() {

                            @Override
                            public void run() {
                                tvRefreshResponse.setText("IN REFRESH LISTENER ONCOMPLETE CAUGHT JSON EXCEPTION \nResponse is " + response);

                            }

                         }); //end runOnUiThread

            } catch (FacebookError fe) {
                runOnUiThread(new Runnable() {


                            @Override
                            public void run() {
                                tvRefreshResponse.setText("IN REFRESH LISTENER ONCOMPLETE CAUGHT FACEBOOK ERROR \nResponse is " + response);

                            }

                         }); //end runOnUiThread
            } //end catch Facebook error

        }  //end onComplete


        @Override
        public void onIOException(IOException e, Object state) {
            tvRefreshResponse.setText("IN REFRESH LISTENER IOEXCEPTION \nException is "+ e.getLocalizedMessage());

        }

        @Override
        public void onFileNotFoundException(FileNotFoundException e, Object state) {
            tvRefreshResponse.setText("IN REFRESH LISTENER FILE NOT FOUND EXCEPTION \nException is "+ e.getLocalizedMessage());
        }

        @Override
        public void onMalformedURLException(MalformedURLException e, Object state) {
            tvRefreshResponse.setText("IN REFRESH MALFORMED URL \nException is "+ e.getLocalizedMessage());

        }

        @Override
        public void onFacebookError(FacebookError e, Object state) {
            tvRefreshResponse.setText("IN REFRESH ONFACEBOOK ERROR \nException is "+ e.getLocalizedMessage());

        }
    } //end RefreshListener

代码完成，即listerner上的OnComplete被调用，但响应不包含新的访问令牌或到期值。回应是......

 {"id":"https:\/\/graph.facebook.com\/oauth\/access_token","shares":78,"comments":1}

当我将相同的URL（带有字母数字当前标记值）放入Web浏览器时，响应包括访问令牌。

相关信息

Facebook的offline_access权限将于2012年5月1日弃用

请不要建议使用onResume（）中的extendAccessTokenIfNeeded函数。 I am also having trouble使用它，这就是为什么我要查看图表API令牌刷新的原因： - ）

相关的Stack Overflow问题

Is it possible to extend Facebook tokens with extendAccessTokenIfNeeded in an Android app?（我的问题）

How would offline_access work after deprecation after May 1st?

Facebook access token can not be extended

Protecting app secret for extendAccessToken usage (Java/Android)

相关的Facebook链接

Facebook Android Tutorial

Facebook offline_access permission deprecation

Answer 1

老实说，我有点困惑 - 看起来你有一切都可以完成 - 而且很简单。但是，让我试着回答你的问题。以下是我的C＃项目中的代码，如果您不熟悉C＃语言和类，我将使用我的注释扩展应用程序的标记：

string currentToken = "token from somewhere";

// WebClient is used to send GET request to the given URL
// and receive the response
using (var req = new System.Net.WebClient())
{
    // create URL string and fill it in with data (app Id, secret, and current token)
    var extendTokenUrl = string.Format(
        "https://graph.facebook.com/oauth/access_token?client_id={0}&client_secret={1}&grant_type=fb_exchange_token&fb_exchange_token={2}",
        FB_APP_ID,
        FB_APP_SECRET,
        currentToken);

    // send GET request and download the response
    var response = req.DownloadString(extendTokenUrl);

    // if all is good, response will be a string which looks like this:
    // access_token=<<THE TOKEN GOES HERE>>
    var newToken = response.Substring("access_token=".Length);

    // now save newToken in your DB INSTEAD of currentToken - 
    // so all calls will be made with extended token
    SaveTokenInDB(newToken);
}

希望有所帮助，并将其转换为Java应该是直截了当的。

在Android应用中获取刷新的Facebook令牌的代码是什么？

1 个答案: