我正在尝试为我的画布应用程序集成Facebook。当我使用以下代码从Facebook运行应用程序时
// init app with app id (APPID) and secret (SECRET)
FacebookSession::setDefaultApplication('xx','xx');
$helper = new FacebookCanvasLoginHelper();
try {
$data = array('oauth_token' => 'token');
$data['algorithm'] = 'HMAC-SHA256';
$data['issued_at'] = time();
$base64data = base64_encode(json_encode($data));
$rawSig = hash_hmac('sha256', $base64data, 'app_Secret', true);
$sig = base64_encode($rawSig);
$signedRequest = $sig.'.'.$base64data;
$_GET['signed_request'] = $signedRequest;
$session = $helper->getSession();
} catch(FacebookRequestException $ex) {
echo $ex;
} catch('Exception $ex) {
echo $ex;
}
由于$_GET['signed_request'] = $signedRequest;.，整个页面只是变成空白白色
我应该怎么做才能获得登录。如果我只是执行$session = $helper->getSession();而不是 Get，我会丢失无效的签名参数 oAuth 数据。
你的PHP应该是：
$helper = new FacebookCanvasLoginHelper();
try {
$session = $helper->getSession();
if($session){
try {
$facebook_profile = (new FacebookRequest(
$session, 'GET', '/me'
))->execute()->getGraphObject(GraphUser::className());
echo $facebook_profile->getName;
} catch(FacebookRequestException $e) {
}
}
} catch(FacebookRequestException $ex) {
echo $ex;
} catch('Exception $ex) {
$facebookLoginHtml = "window.top.location = 'https://www.facebook.com/dialog/oauth?client_id={your_app_id}&redirect_uri={your_app_canvas_url}';";
}
然后在您的 HTML 中的某个地方：
<script>
<?php if(isset($facebookLoginHtml)){ echo $facebookLoginHtml; } ?>
</script>
如果要请求额外的权限，请在 URL 中添加 scope 参数，如下所示：
$facebookLoginHtml = "window.top.location = 'https://www.facebook.com/dialog/oauth?client_id={your_app_id}&redirect_uri={your_app_canvas_url}&scope=publish_actions';";
这会将页面重定向到登录页面，然后使用适当的权限返回到画布应用。
这不应该像这样工作，因为它使用Javascript和PHP SDK。这是Facebook正在解决的一个错误，您可以在此处关注：
https://developers.facebook.com/bugs/722275367815777
如果该错误得到解决，我将编辑答案。
谢谢大家！
我的方法：
<?php
session_start();
require ({your_php_sdk_path} . 'autoload.php');
use Facebook'FacebookCanvasLoginHelper;
use Facebook'FacebookRedirectLoginHelper;
use Facebook'FacebookSession;
use Facebook'FacebookRequest;
use Facebook'GraphUser;
FacebookSession::setDefaultApplication({your_app_id},{your_app_secret});
$helper = new FacebookCanvasLoginHelper();
try {
$session = $helper->getSession();
}catch(FacebookRequestException $ex) {
// When Facebook returns an error
} catch('Exception $ex) {
// When validation fails or other local issues
}
if (!is_null($session)) {
// Logged in
try {
//Get user name
$user_profile = (new FacebookRequest(
$session, 'GET', '/me'
))->execute()->getGraphObject(GraphUser::className());
$user_profile_name = $user_profile->getName();
//Get user picture
$request = new FacebookRequest(
$session,
'GET',
'/me/picture',
array (
'redirect' => false,
'height' => '135',
'width' => '135',
)
);
$response = $request->execute();
$graphObject = $response->getGraphObject();
$user_profile_picture = $graphObject->getProperty('url');
} catch(FacebookRequestException $e) {
// When Facebook returns an error
} catch(Exception $e) {
// When validation fails or other local issues
}
}else{
//First time -> ask for authorization
$helper = new FacebookRedirectLoginHelper({your_canvas_url});
$login_url = $helper->getLoginUrl();
}
?>
在你的 html 中放一个 javascript：
<script type="text/javascript">
if($login_url != null){
top.location.href = $login_url;
}
</script>
<?php
// init app with app id (APPID) and secret (SECRET)
FacebookSession::setDefaultApplication('*********','*********' );
$helper = new FacebookCanvasLoginHelper();
try {
$session = $helper->getSession();
} catch(FacebookRequestException $ex) {
// When Facebook returns an error
} catch(Exception $ex) {
// When validation fails or other local issues
}
if($session) {
// graph api request for user data
$request = new FacebookRequest( $session, 'GET', '/me' );
$response = $request->execute();
// get response
$graphObject = $response->getGraphObject();
// print data
echo '<pre>' . print_r( $graphObject, 1 ) . '</pre>';
}
else {
// show login url
echo '<a href="' . $helper->getLoginUrl($scope) . '">Login</a>';
}
?>