需要OAuthException代码2500的帮助 [英] Need Help on OAuthException Code 2500

问题描述

我正在尝试使用PHP开发一个Facebook应用程序（apps.facebook.com/some_app），我需要根据用户的音乐兴趣提供一些信息。我发现它在user_likes>游戏下。

I am trying to develop an Facebook application (apps.facebook.com/some_app) using PHP where I need to present some information based on user's music interests. I found that its under "user_likes > games".

我的问题如下：

• 要获得访问权限，我已经在我的索引页面中将API实现了oauth对话框方法
  。

$auth_url = "http://www.facebook.com/dialog/oauth?client_id="
            . $app_id . "&redirect_uri=" 
            . urlencode($canvas_page)
            ."&scope=user_likes";

• 成功授权后，我回到使用code的索引页
  作为参数。



http://MY_CANVAS_PAGE/?code=some base64 encoded letters







• 不知道我是否需要access_token只是为了阅读用户的音乐
  兴趣，但我已经尝试了所有的方法建议。我不能从这一点向前移动
  


• 我有一个这样的代码（在我的索引页面中），如果未设置代码参数，则重定向以进行授权。 li>
  
  • Firstly I don't know if I need access_token just to read user's music interests but I have tried all the methods suggested. I couldn't move forward from this point
  • I have a code like this (in my index page), which redirects for authorization if code parameters is not set.

  if(empty($code) && !isset($_REQUEST['error'])) {
    $_SESSION['state'] = md5(uniqid(rand(), TRUE)); //CSRF protection
    echo("<script> top.location.href='" . $auth_url . "'</script>");
  }
  

  
  
  

  
  
  • 目前我只是想让用户公开信息在这里，但
    没有成功。我已经尝试使用signed_request方法建议
    但没有成功
  
  

  $signed_request = $_REQUEST["signed_request"];
  list($encoded_sig, $payload) = explode('.', $signed_request, 2);
  $data = json_decode(base64_decode(strtr($payload, '-_', '+/')), true);
  echo ("Welcome User: " . $data["user_id"]);
  

  
  
  

  
  

  • 还尝试在
    < a href =http://developers.facebook.com/blog/post/500/ =noreferrer> http://developers.facebook.com/blog/post/500/

    但是，尝试使用

    print_r($decoded_response);
    

    
    
    

    ---

    
    
    

    ---

    stdClass Object ( [error] => stdClass Object ( [message] => An active 
    access token must be used to query information about the current user. 
    [type] => OAuthException [code] => 2500 ) ) 
    

    为了获取用户的公共信息，我也尝试了PHP中的建议示例SDK

    To get user's public info, I have tried also the suggested example in PHP SDK

    $facebook = new Facebook(array(
    'appId'  => MY_APP_ID, //registered facebook APP ID
    'secret' => MY_SECRET, //secret key for APP
    ));
    
    $fb_user = $facebook->getUser();
    
    if($fb_user){
        try {
          $user_profile = $facebook->api('/me');
          echo $user_profile['email'];
        }
        catch(FacebookApiException $e) {
          $fb_user = null;
        }
    }
    

    但没有成功。有人可以解释一下为什么我收到这个错误，以及如何正确地访问用户的音乐兴趣。可能我误解了API。

    But no success. Can somebody explain me why I am getting this error and how to access the user's music interest properly. Probably I misunderstood the API.

    谢谢

    Deepak

    推荐答案

    错误2500表示您没有访问令牌或应用访问令牌，但尝试访问 / me / - '我'是'当前用户或页面ID'的占位符，所以如果没有用户或页面的访问令牌，则不会生效。

    Error 2500 means you have no access token or an app access token but are trying to access /me/ - 'me' is a placeholder for 'current user or page ID' so won't be valid without an access token for a user or page.

    要访问用户的列表您还需要 user_likes 许可当他们授权他们

    To access the user's list of likes you'll also need the user_likes Permission when authorising them

    最可能的原因，我看到的应用程序无法交换代码用于访问令牌是：

    The most likely causes i've seen for apps not being able to exchange the code for an access token are:

    
    
    1. 您使用的 redirect_uri 是一个文件夹或服务器根目录，并且缺少尾部斜杠（即它是 http://www.example.com 而不是 http：//www.example。 com / ）
    
    
    2. redirect_uri 您在第一次调用auth对话框中使用的内容与用于访问access_token的代码中使用的 redirect_uri 不完全相同
    
    
    1. The redirect_uri you used is to a folder or server root and is missing a trailing slash (i.e it's http://www.example.com instead of http://www.example.com/)
    2. The redirect_uri you used in the first call to the auth dialog wasn't precisely the same as the redirect_uri you used in the call to exchagne the code for an access_token

    如果您的验证流由于其他原因而损坏，您无法从SDK示例或身份验证文档，这可能需要一段时间才能让人与您交流，因为您可能会缺少必要的背景知识了解他们的答案

    If your auth flow is broken for some other reason and you can't figure it out from the SDK examples or the Authentication documentation, this could take a while for someone to talk you through because you may be missing some background knowledge necessary to understand their answers

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