我的Facebook应用程序如何将消息发布到墙上？

Question

我已经找到了如何使用图表api代表facebook用户向墙上发布内容。但是现在我想以我的应用程序的名义发布一些内容。

这里是如何我试图做到这一点：

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." 
} 

有没有人看到我在哪里出错？我真的坚持这一点。

谢谢！

Answer 1

您需要获取应用程序的身份验证令牌以作为该应用程序发布。

Auth_Token定义您发布的安全上下文。

您需要为当前用户请求以下Graph API URL以查找您的应用程序的访问令牌。

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

这应该给你类似以下的输出：

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

确保您有manage_pages权限调用该API之前，或您将无法获得访问令牌回来。

一旦你有了访问令牌，你就可以像任何其他用户那样发布到墙上。请注意，URL中使用的ID与应用程序的ID相匹配。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 

确保您在发布到墙上之前也拥有publish_stream权限。

Answer 2

最近我和FB api一起工作过。
我已经完成了JavaScript中的每一件事。
以下是我用来发布到用户墙上的内容。
我希望这可以帮助你。

包括由FB提供的JavaScript库并将您的应用ID添加到它。

 
<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，我用一个按钮 “fb_login” 为ID，然后我用的jQuery如下：

 
$("#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，您必须添加{烫发： 'publish_stream'}如上所述，这将获得您发布到用户墙的权利。

使用id = “stream_publish”，然后将下面的jQuery A键：

 
$("#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); 
    } 
}