facebook访问令牌已过期

Question

基于facebook instructions (Scenario 4)我使用以下URL

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

获取新的访问令牌，但我得到以下内容：

{“error”：{“message”：“验证访问令牌时出错：会话已在unix时间1365257820过期。当前unix时间为1365759029。”，“type”：“OAuthException”，“code”：190，“error_subcode” ：463}}

不起作用。任何帮助赞赏。

编辑：知道了！像这样工作

如果访问令牌过期，则在将其存储在服务器上后，首先在浏览器上运行以下php脚本

<?php
  $app_id = "your app id";
  $app_secret = "your app secret"; 
  $my_url = "http://apps.facebook.com/your_app_name";

  // known valid access token stored in a database 
  $access_token = "your old access token";

  $code = $_REQUEST["code"];

  // If we get a code, it means that we have re-authed the user 
  //and can get a valid access_token. 
  if (isset($code)) {
    $token_url="https://graph.facebook.com/oauth/access_token?client_id="
      . $app_id . "&redirect_uri=" . urlencode($my_url) 
      . "&client_secret=" . $app_secret 
      . "&code=" . $code . "&display=popup";
    $response = file_get_contents($token_url);
    $params = null;
    parse_str($response, $params);
    $access_token = $params['access_token'];
  }


  // Attempt to query the graph:
  $graph_url = "https://graph.facebook.com/me?"
    . "access_token=" . $access_token;
  $response = curl_get_file_contents($graph_url);
  $decoded_response = json_decode($response);

  //Check for errors 
  if ($decoded_response->error) {
  // check to see if this is an oAuth error:
    if ($decoded_response->error->type== "OAuthException") {
      // Retrieving a valid access token. 
      $dialog_url= "https://www.facebook.com/dialog/oauth?"
        . "client_id=" . $app_id 
        . "&redirect_uri=" . urlencode($my_url);
      echo("<script> top.location.href='" . $dialog_url 
      . "'</script>");
    }
    else {
      echo "other error has happened";
    }
  } 
  else {
  // success
    echo("success" . $decoded_response->name);
    echo($access_token);
  }

  // note this wrapper function exists in order to circumvent PHP’s 
  //strict obeying of HTTP error codes.  In this case, Facebook 
  //returns error code 400 which PHP obeys and wipes out 
  //the response.
  function curl_get_file_contents($URL) {
    $c = curl_init();
    curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($c, CURLOPT_URL, $URL);
    $contents = curl_exec($c);
    $err  = curl_getinfo($c,CURLINFO_HTTP_CODE);
    curl_close($c);
    if ($contents) return $contents;
    else return FALSE;
  }
?>

上面的脚本将在浏览器中为您提供类似下面的URL

https://graph.facebook.com/oauth/access_token?code= ...

然后在code =之后获取字符串（应该是这样的：AQCn41Svv5DbWrnFY0Wf ..... YbNm_yz2rE＃_）并将其粘贴到下面的code = URL并在浏览器上运行下面的URL

https://graph.facebook.com/oauth/access_token?client_id=App_Id&redirect_uri=http://apps.facebook.com/poemsoflove&client_secret=App_Secret&code=AQCn41Svv5DbWrnFY0Wf.....YbNm_yz2rE#_&display=popup

您将获得以下响应，这是60天的新访问令牌

access_token=<Extended_Access_Token>&expires=5180130

将access_token =之后的字符串复制并粘贴到服务器上用于在页面上发布新帖子的脚本

Answer 1

1. 创建应用程序Facebook Developer Page

用php之后可以获得实时访问令牌

$app_id = '{Application Id}';
$app_secret = '{Application Secret}';
$access_token = "https://graph.facebook.com/oauth/access_token?client_id=$app_id&client_secret=$app_secret&grant_type=client_credentials";
$access_token = file_get_contents($access_token); // returns 'accesstoken=APP_TOKEN|APP_SECRET'
$access_token = str_replace('access_token=', '', $access_token);

Answer 2

$app_id = 'APP_ID';
$app_secret = 'APP_SECRET';
$access_token_url = "https://graph.facebook.com/oauth/access_token?client_id=$app_id&client_secret=$app_secret&grant_type=client_credentials";
$access_token_data = file_get_contents($access_token_url);
$access_token_arr = json_decode($access_token_data);
$access_token = $access_token_arr->access_token;