private $_api_key;
private $_api_secret;
private $_token_url = 'oauth/access_token';
private $_user_url = 'me';
private $_data = array();
function __construct()
{
$this->_obj =$CI =& get_instance();
$fb_api_id = $CI->db->get_where('settings', array('code' => 'SITE_FB_API_ID'))->row()->string_value;
$fb_api_secret = $CI->db->get_where('settings', array('code' => 'SITE_FB_API_SECRET'))->row()->string_value;
$this->_api_key = $fb_api_id;
$this->_api_secret = $fb_api_secret;
$this->_token_url = $this->_obj->config->item('facebook_api_url').$this->_token_url;
$this->_user_url = $this->_obj->config->item('facebook_api_url').$this->_user_url;
$this->_set('scope', $this->_obj->config->item('facebook_default_scope'));
$this->connection = new facebookConnection();
if ( !$this->logged_in() )
{
// Initializes the callback to this page URL.
$this->set_callback();
}
}
public function logged_in()
{
return ( $this->get() === NULL ) ? FALSE : TRUE;
}
public function logout()
{
$this->_unset('token');
$this->_unset('user');
}
public function login_url($scope = NULL)
{
$url = "http://www.facebook.com/dialog/oauth?client_id=".$this->_api_key.'&redirect_uri='.urlencode($this->_get('callback'));
if ( empty($scope) )
{
$scope = $this->_get('scope');
}
else
{
$this->_set('scope', $scope);
}
if ( !empty($scope) )
{
$url .= '&scope='.$scope;
}
return $url;
}
public function login($scope = NULL)
{
$this->logout();
if ( !$this->_get('callback') ) $this->_set('callback', current_url());
$url = $this->login_url($scope);
return redirect($url);
}
public function get()
{
$token = $this->_find_token();
if ( empty($token) ) return NULL;
// $user = $this->_get('user');
// if ( !empty($user) ) return $user;
try
{
$user = $this->connection->get($this->_user_url.'?'.$this->_token_string());
}
catch ( facebookException $e )
{
$this->logout();
return NULL;
}
// $this->_set('user', $user);
return $user;
}
private function _find_token()
{
$token = $this->_get('token');
if ( !empty($token) )
{
if ( !empty($token->expires) && intval($token->expires) >= time() )
{
// Problem, token is expired!
return $this->logout();
}
$this->_set('token', $token);
return $this->_token_string();
}
if ( !isset($_GET['code']) )
{
return $this->logout();
}
if ( !$this->_get('callback') ) $this->_set('callback', current_url());
$token_url = $this->_token_url.'?client_id='.$this->_api_key."&client_secret=".$this->_api_secret."&code=".$_GET['code'].'&redirect_uri='.urlencode($this->_get('callback'));
try
{
$token = $this->connection->get($token_url);
}
catch ( facebookException $e )
{
$this->logout();
redirect($this->_strip_query());
return NULL;
}
$this->_unset('callback');
if ( $token->access_token )
{
if ( !empty($token->expires) )
{
$token->expires = strval(time() + intval($token->expires));
}
$this->_set('token', $token);
redirect($this->_strip_query());
}
return $this->_token_string();
}
private function _get($key)
{
$key = '_facebook_'.$key;
return $this->_obj->session->userdata($key);
}
private function _set($key, $data)
{
$key = '_facebook_'.$key;
$this->_obj->session->set_userdata($key, $data);
}
private function _unset($key)
{
$key = '_facebook_'.$key;
$this->_obj->session->unset_userdata($key);
}
public function set_callback($url = NULL)
{
$this->_set('callback', $this->_strip_query($url));
}
private function _token_string()
{
return 'access_token='.$this->_get('token')->access_token;
}
public function append_token($url)
{
if ( $this->_get('token') ) $url .= '?'.$this->_token_string();
return $url;
}
private function _strip_query($url = NULL)
{
if ( $url === NULL )
{
$url = ( empty($_SERVER['HTTPS']) ) ? 'http' : 'https';
$url .= '://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
}
$parts = explode('?', $url);
return $parts[0];
}
请告诉我当用户尝试在站点中使用 fb 帐户登录时，从 facebook 检索到的所有内容作为令牌。
我在此代码中收到以下错误：
消息：试图获取非对象的属性
文件名：库/Facebook_Lib.php
行号：454
遇到 PHP 错误
严重性：通知
消息：试图获取非对象的属性
文件名：库/Facebook_Lib.php
行号：493
严重性：通知
消息：试图获取非对象的属性
文件名：库/Facebook_Lib.ph
行号：493
有关 access_token 的所有错误