Facebook SDK错误：跨站点请求伪造验证失败。永久数据中缺少必需的参数状态(&Q)
我最近升级到最新版本的Facebook SDK，但我在登录用户时遇到了问题。我很好地生成了登录链接，但当Facebook使用令牌将用户发送回我的站点时，我收到以下错误：
FB SDK错误：跨站点请求伪造验证失败。永久数据中缺少必需的参数"STATE"。我试着解决了一些问题。我输出了会话数据中的所有内容和GET请求中的所有内容。我看到GET有一个STATE参数，而会话数据有一个FBRLHSTATE参数。它们具有相同的价值。那么它怎么会告诉我参数丢失了呢？
我已经尝试了我在其他问题上看到的一些建议(例如，启动会话)，但似乎都不起作用。
如有任何帮助，将不胜感激！我使用的是php-graph-sdk-5.5。我的Facebook连接文件如下
if(!class_exists('facebook')){
class facebook{
private $db = null;
private $fb = null;
private $token = null;
private $DEV = null;
private $sdk_error = null;
private $api_error = null;
private $verbose = false;
private $graph_user = null;
private $db_helper = null;
private $errors = null;
public function __construct($db,
$fb_id = FB_APP_ID,
$fb_secret = FB_APP_SECRET,
$fb_version = FB_DEFAULT_GRAPH_VERSION){
if($this->verbose) echo '<pre>';
if($this->verbose) echo 'starting construction'.PHP_EOL;
$this->db = $db;
if(!$this->fb){
$this->log[] = 'no connect found. building..'.PHP_EOL;
$this->fb = new FacebookFacebook(array(
'app_id' => $fb_id,
'app_secret' => $fb_secret,
'default_graph_version' => $fb_version));
if(!$this->fb){
die('facebook initialization failure');
}
$this->log[] = 'finished building new connection'.PHP_EOL;
}
}
public function get_login_url($callback_uri, $permissions = ['email','user_birthday']){
global $_DEV,$_config;
$helper = $this->fb->getRedirectLoginHelper();
$callback_host = ($_DEV ? $_config['dev_domain'] : $_config['live_domain']);
$callback_url = 'https://'.$callback_host.$callback_uri;
return $helper->getLoginUrl($callback_url, $permissions);
}
public function catch_token(){
if($this->token){
$this->log[] = 'already have token.'.PHP_EOL;
return $this->token;
} else if(!$this->fb){
$this->log[] = $this->error[] = 'no facebook connection in catch token()';
}
$this->log[] = 'starting catch token routine.'.PHP_EOL;
//$_SESSION['state']=$_GET['state'];
echo '<pre>' . var_export($_SESSION, true) . '</pre>';
echo '<BR><BR><pre>' . var_export($_GET, true) . '</pre>';
$helper = $this->fb->getRedirectLoginHelper();
$this->token = $helper->getAccessToken();
$this->log[] = 'caught token: '.$this->token;
$string_token = $this->token.PHP_EOL;
//die($string_token);
try {
$helper = $this->fb->getRedirectLoginHelper();
$this->token = $helper->getAccessToken();
$this->log[] = 'caught token: '.$this->token;
$string_token = $this->token.PHP_EOL;
return $this->user_flush();
} catch(FacebookExceptionsFacebookResponseException $e) {
// When Graph returns an error
$this->log[] = $this->errors[] = 'fb api error: ' . $e->getMessage();
return null;
} catch(FacebookExceptionsFacebookSDKException $e) {
// When validation fails or other local issues
$this->log[] = $this->errors[] = 'fb sdk error: ' . $e->getMessage();
return null;
} catch(Exception $e){
$this->log[] = $this->errors[] = 'unknown error: '.$e->getMessage();
return null;
}
}
public function get_token(){
$this->log[] = 'get token called.'.PHP_EOL;
if($this->token){
$this->log[] = 'token found in object'.PHP_EOL;
//echo '<pre>';
//die(debug_print_backtrace());
return $this->token;
} else {
$this->log[] = $this->errors[] = 'token not found in object.'.PHP_EOL;
return null;
}
}
public function get_user($override = false){
$fields = array(
'first_name',
'last_name',
'email',
'id',
'picture',
'birthday',
'gender',);
$fields = implode(',',$fields);
if($this->graph_user === null){
if($this->fb && $this->get_token()){
try {
// Returns a FacebookFacebookResponse object
$resp_url = '/me?fields='.$fields.'&debug=all';
$this->log[] = $resp_url;
$response = $this->fb->get($resp_url, $this->get_token());
$this->graph_user = $response->getGraphUser();
return $this->graph_user;
}
catch(FacebookExceptionsFacebookResponseException $e) {
// When Graph returns an error
$this->api_error = 'fb api error: ' . $e->getMessage();
$this->errors[] = $this->api_error;
return null;
}
catch(FacebookExceptionsFacebookSDKException $e) {
// When validation fails or other local issues
$this->sdk_error = 'fb sdk error: ' . $e->getMessage();
$this->errors[] = $this->sdk_error;
return null;
}
} else {
$this->sdk_error = "get_user(): fb connection or token not set. are you logged in?";
$this->errors[] = $this->sdk_error;
//echo '<pre>';
//debug_print_backtrace();
//die('token: '.$this->token);
return null;
}
} else {
$this->sdk_error = "get_user(): graph_user already set";
$this->errors[] = $this->sdk_error;
return $this->graph_user;
}
}
public function get_user_first_name(){
return $this->get_user()['first_name'];
}
public function get_user_last_name(){
return $this->get_user()['last_name'];
}
public function get_user_id(){
return $this->get_user()['id'];
}
public function get_user_email(){
return $this->get_user()['email'];
}
public function get_user_picture(){
return $this->get_user()['picture']['url'];
}
public function get_user_birthday(){
return $this->get_user()['birthday'];
}
public function user_flush(){
//this is the command function.
// runs the basic functionality of this class
// by adding this user to the database if they're not there
// and logging them in if they are.
$this->graph_user = $this->get_user();
//$this->log['graph_user_at_user_flush'] = $this->graph_user;
$this->build_user();
$this->log['GRAPH_USER'] = $this->get_user();
$this->log['user_input_array@user_flush'] = $this->user_input;
if($return = $this->user->fb_register()){
//die(print_r(debug_backtrace(),true));
//$this->log['success return'] = '. '.$return;
return $return;
} else {
//die('<pre>'.print_r(debug_backtrace(),true));
$this->log['fb_register_fail'] = array('fb_register() (also login) failed.',$this->user->get_errors());
return null;
}
}
public function build_user(){
$this->user_input['first_name'] = $this->get_user_first_name();
//$this->user_input['last_name'] = $this->get_user_last_name();
$this->user_input['facebook_id'] = $this->get_user_id();
$this->user_input['email'] = $this->get_user_email();
$this->user_input['image_url'] = $this->get_user_picture();
$this->user_input['birthday'] = $this->get_user_birthday();
if($this->verbose)
print_r($this->user_input);
$this->user = new user($this->user_input,$this->db);
}
public function logout(){
unset($_SESSION['fb_id']);
unset($this->token);
unset($this->fb);
}
public function get_errors(){
return array_unique($this->errors);
}
public function get_log(){
return array_unique($this->log);
}
}
}
//finally, create the connection.
if(!isset($fb))
$fb = new facebook($db);
解决方案
FB SDK错误：跨站点请求伪造验证失败。永久数据中缺少必需的参数"STATE"。
这与您正在经历两次调用getRedirectLoginHelper和$helper->getAccessToken()的例程有关--一次"自己"，然后在try-Catch块中再次调用(可能是复制粘贴错误或不幸的调试尝试？)
我现在有点懒得去检查SDK源代码，但我认为它在代码被交换为令牌后故意取消了会话中的状态参数，这是为了使整个过程更安全-这样当您第二次调用getAccessToken时，它就会失败。
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