Question

我已经找到了如何代表facebook用户使用图形api将某些内容发布到墙上。但现在我想以我的应用程序的名义发布一些东西。

以下是我尝试这样做的方法：

protected void btn_submit_Click(object sender, EventArgs e)
{

    Dictionary<string, string> data = new Dictionary<string, string>();
    data.Add("message", "Testing");
    // i'll add more data later here (picture, link, ...)
    data.Add("access_token", FbGraphApi.getAppToken());
    FbGraphApi.postOnWall(ConfigSettings.getFbPageId(), data);

}

FbGraphApi.getAppToken（）

// ...
private static string graphUrl = "https://graph.facebook.com";
//...

public static string getAppToken() {
    MyWebRequest req = new MyWebRequest(graphUrl + "/" + "oauth/access_token?type=client_cred&client_id=" + ConfigSettings.getAppID() + "&client_secret=" + ConfigSettings.getAppSecret(), "GET");
    return req.GetResponse().Split('=')[1];
}

FbGraphApi.postOnWall（）

public static void postOnWall(string id, Dictionary<string,string> args)
    {
        call(id, "feed", args);
    }

FbGraphApi.call（）

private static void call(string id, string method, Dictionary<string,string> args )
{
    string data = "";
    foreach (KeyValuePair<string, string> arg in args)
    {

        data += arg.Key + "=" + arg.Value + "&";

    }

    MyWebRequest req = new MyWebRequest(graphUrl +"/" + id + "/" + method, "POST", data.Substring(0, data.Length - 1));


    req.GetResponse();  // here i get: "The remote server returned an error: (403) Forbidden."
}

有谁知道我哪里错了？我真的很困惑。

谢谢！

Answer 1

您需要获取应用程序的Auth Token才能作为该应用程序发布。

Auth_Token定义您要发布的安全上下文。

您需要为当前用户请求以下图谱API网址，以便为您的应用找到访问令牌。

https://graph.facebook.com/me/accounts?access_token=XXXXXXXX

这应该给你一个类似于以下的输出：

{
   "data": [
      {
         "name": "My App",
         "category": "Application",
         "id": "10258853",
     "access_token": "xxxxxxxxxxxxxxxx"
      }
   ]
}

在调用该API之前，请确保您拥有manage_pages权限，否则您将无法获得访问令牌。

获得访问令牌后，您就像向任何其他用户一样发布到墙上。请注意，URL中使用的ID与应用程序的ID匹配。这将作为应用程序发布到应用程序的墙上。

https://graph.facebook.com/10258853/feed?access_token=XXXXXXX

在发布到墙上之前，请确保您拥有publish_stream权限。

Answer 2

最近我和FB api合作过。
我用javascript完成了所有的事情这是我以前发布到用户墙上的内容我希望这可以帮助你。

包括FB提供的javascript库，并将您的应用ID添加到其中。

<div id="fb-root"></div>
      <script>

      window.fbAsyncInit = function() {
        FB.init({appId: 'your app id', status: true, cookie: true,
                 xfbml: true});
      };
      (function() {
        var e = document.createElement('script');
        e.type = 'text/javascript';
        e.src = document.location.protocol +
          '//connect.facebook.net/en_US/all.js';
        e.async = true;
        document.getElementById('fb-root').appendChild(e);
      }());

       </script>

对于登录，我使用了一个带有“fb_login”作为id的按钮，然后我使用了jquery，如下所示：

$("#fb_login").click(function(){
    FB.login(function(response) {
        if (response.session) 
        {
            if (response.perms)
            {
                               // alert("Logged in and permission granted for posting");
            } 
            else 
            {
                  // alert("Logged in but permission not granted for posting"); 
            }
        }
        else
        {
                        //alert("Not Logged In");
        }
}, {perms:'publish_stream'});

请注意，您必须如上所述添加 {perms：'publish_stream'} ，这将使您有权发布到用户墙。

一个id =“stream_publish”的按钮，然后是以下jquery：

$("#stream_publish").click(function(){

      FB.getLoginStatus(function(response){

          if(response.session)
          {
                publishPost(response.session);
          }

      });
});

function publishPost(session)
{
    var publish = {
      method: 'stream.publish',
      message: 'Your Message',
      picture : 'Image to be displayed',
      link : 'The link that will be the part of the post, which can point to either your app page or your personal page or any other page',
      name: 'Name or title of the post',
      caption: 'Caption of the Post',
      description: 'It is fun to write Facebook App!',
      actions : { name : 'Start Learning', link : 'link to the app'}
    };

    FB.api('/me/feed', 'POST', publish, function(response) {  

        document.getElementById('confirmMsg').innerHTML = 
               'A post had just been published into the stream on your wall.';
    });
};

Answer 3

private class FbWebViewClient extends WebViewClient {

    boolean started=false;

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        Log.d("Facebook-WebView", "Redirect URL: " + url);
        if (url.startsWith(Facebook.REDIRECT_URI)) {
            Bundle values = Util.parseUrl(url);

            String error = values.getString("error");
            if (error == null) {
                error = values.getString("error_type");
            }

            if (error == null) {
                mListener.onComplete(values);
            } else if (error.equals("access_denied")
                    || error.equals("OAuthAccessDeniedException")) {
                mListener.onCancel();
            } else {
                mListener.onFacebookError(new FacebookError(error));
            }

            FbDialog.this.dismiss();
            return true;
        } else if (url.startsWith(Facebook.CANCEL_URI)) {
            mListener.onCancel();
            FbDialog.this.dismiss();
            return true;
        } else if (url.contains(DISPLAY_STRING)) {
            return false;
        }
        // launch non-dialog URLs in a full browser
        getContext().startActivity(
                new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
        return true;
    }

    @Override
    public void onReceivedError(WebView view, int errorCode,
            String description, String failingUrl) {
        super.onReceivedError(view, errorCode, description, failingUrl);
        mListener.onError(new DialogError(description, errorCode,
                failingUrl));
        FbDialog.this.dismiss();
    }

    public Map<String, String> getUrlParameters(String url)
            throws UnsupportedEncodingException {
        Map<String, String> params = new HashMap<String, String>();
        String[] urlParts = url.split("\\?");
        if (urlParts.length > 1) {
            String query = urlParts[1];
            for (String param : query.split("&")) {
                String pair[] = param.split("=");
                String key = URLDecoder.decode(pair[0], "UTF-8");
                String value = "";
                if (pair.length > 1) {
                    value = URLDecoder.decode(pair[1], "UTF-8");
                }

                params.put(key, value);

            }
        }
        return params;
    }

    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
        Log.d("Facebook-WebView", "Webview loading URL: " + url);

        String newUrl="http://www.facebook.com/dialog/feed?_path=feed&app_id="; 
        if (url.contains("touch") && started==false) {

            started=true;
            ChildTabBibleLessonActivity.fbMaterial=ChildTabBibleLessonActivity.fbMaterial.replace(" ", "+");
            url=url+"&picture=http://www.minibiblecollege.org/mbclandingpage/images/icmlogo-small.jpg&description="+ChildTabBibleLessonActivity.fbMaterial;
        /*  Map<String,String> param;
            try {
                param = getUrlParameters(url);
                newUrl=newUrl+param.get("app_id")+"&redirect_uri="+"https://deep-rain-6015.herokuapp.com"+"&display=page&picture=http://www.minibiblecollege.org/mbclandingpage/images/icmlogo-small.jpg"+"&name=MiniBible&description=heregoesMyMessage";

            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            */
            view.loadUrl(url);
            //super.onPageStarted(view, url, favicon);
        }
        else
        {
        super.onPageStarted(view, url, favicon);
        }
        mSpinner.show();
    }

    @Override
    public void onPageFinished(WebView view, String url) {
        super.onPageFinished(view, url);
        mSpinner.dismiss();
        /*
         * Once webview is fully loaded, set the mContent background to be
         * transparent and make visible the 'x' image.
         */
        mContent.setBackgroundColor(Color.TRANSPARENT);
        mWebView.setVisibility(View.VISIBLE);
        mCrossImage.setVisibility(View.VISIBLE);
    }
}

我的facebook应用程序如何将消息发布到墙上？

3 个答案: