现在我使用Facebook SDK V5.0 按“使用Facebook登入”后,其自动重定向到“callback.php” 和长寿命的访问令牌应该发出。但是使用Facebook的SDK V5.0但错误尝试出现
每次都会出现此错误。
Facebook SDK returned an error: Cross-site request forgery validation failed. Required param "state" missing.
,如果您有任何解决方案来解决这个错误 请告诉我。
这里是我的代码:callback.php
<html>
<meta charset="UTF-8" content="text/html">
<?php
session_start();
require_once __DIR__ . '/facebook-php-sdk-v4-5.0-dev/src/Facebook/autoload.php';
$fb = new Facebook\Facebook([
'app_id' => '3xxxxxxxxxxxxxxxxxx7',
'app_secret' => '0xxxxxxxxxxxxxxxxxxxx7',
'default_graph_version' => 'v2.4',
]);
$helper = $fb->getRedirectLoginHelper();
try {
$accessToken = $helper->getAccessToken();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
if (! isset($accessToken)) {
if ($helper->getError()) {
header('HTTP/1.0 401 Unauthorized');
echo "Error: " . $helper->getError() . "\n";
echo "Error Code: " . $helper->getErrorCode() . "\n";
echo "Error Reason: " . $helper->getErrorReason() . "\n";
echo "Error Description: " . $helper->getErrorDescription() . "\n";
} else {
header('HTTP/1.0 400 Bad Request');
echo 'Bad request';
}
exit;
}
// Logged in
echo '<h3>Access Token</h3>';
var_dump($accessToken->getValue());
// The OAuth 2.0 client handler helps us manage access tokens
$oAuth2Client = $fb->getOAuth2Client();
// Get the access token metadata from /debug_token
$tokenMetadata = $oAuth2Client->debugToken($accessToken);
echo '<h3>Metadata</h3>';
var_dump($tokenMetadata);
// Validation (these will throw FacebookSDKException's when they fail)
$tokenMetadata->validateAppId($config['app_id']);
// If you know the user ID this access token belongs to, you can validate it here
//$tokenMetadata->validateUserId('123');
$tokenMetadata->validateExpiration();
if (! $accessToken->isLongLived()) {
// Exchanges a short-lived access token for a long-lived one
try {
$accessToken = $oAuth2Client->getLongLivedAccessToken($accessToken);
} catch (Facebook\Exceptions\FacebookSDKException $e) {
echo "<p>Error getting long-lived access token: " . $helper->getMessage() . "</p>\n\n";
exit;
}
echo '<h3>Long-lived</h3>';
var_dump($accessToken->getValue());
}
$_SESSION['fb_access_token'] = (string) $accessToken;
// User is logged in with a long-lived access token.
// You can redirect them to a members-only page.
//header('Location: https://example.com/members.php');
?>
</html>
以防万一,我也张贴本。 :login.php中
<html>
<meta charset="UTF-8" content="text/html">
<?php
session_start();
require_once __DIR__ . '/facebook-php-sdk-v4-5.0-dev/src/Facebook/autoload.php';
$fb = new Facebook\Facebook([
'app_id' => '3xxxxxxxxxxxxxxxxx7',
'app_secret' => '0xxxxxxxxxxxxxxxxxxx7',
'default_graph_version' => 'v2.4',
]);
$helper = $fb->getRedirectLoginHelper();
$permissions = ['email']; // Optional permissions
$loginUrl = $helper->getLoginUrl('http://127.0.0.1:8887/fb/fb-callback.php', $permissions);
echo '<a href="' . $loginUrl . '">Log in with Facebook!</a>';
?>
</html>
启用适当的PHP错误报告!在输出完成后调用'session_start'应该会导致错误(除非输出缓冲处于激活状态)。 – CBroe
感谢您告诉我这一点。 –
session_start(); require_once __DIR__。 '/facebook-php-sdk-v4-5.0-dev/src/Facebook/autoload.php'; 你的意思是这段代码对吗?应该重写什么? –