Facebook OAuth access_token error - facebook

Question

Full code.
public function indexAction(){
echo 'Login met facebook ';
}
const FB_GRAPH_URL = "https://graph.facebook.com/";
public function fbloginAction() {
$fbCode = $this->_getParam("code");
$getStr = self::FB_GRAPH_URL. 'oauth/access_token?' .http_build_query(array(
'client_id' => 'APP_ID',
'type' => 'client_cred',
'client_secret' => 'SECRET_KEY',
'code' => $fbCode)
);
$accessToken = file_get_contents( $getStr );
krumo($accessToken) ;
$dbpath = "https://graph.facebook.com/me?$accessToken" ;
$cont = file_get_contents($dbpath ) ;
krumo($cont);
}
When i try make GET query to Facebook.
$dbpath = "https://graph.facebook.com/me?$accessToken" ;
$cont = file_get_contents($dbpath ) ;
I receive the error :
failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request
in /home.....
When paste manually the $dbpath value(path) to web browser, i got next error:
{
"error": {
"message": "An active access token must be used to query information about the current user.",
"type": "OAuthException",
"code": 2500
}
}
How fix that error?

Answer 1

You probably want to use the Server-Side Authentication flow. By checking the calls in the documentation it is quite clear, which of your calls are wrong.
First, your call to the oauth/access_token endpoint takes no argument 'type' => 'client_cred', but it needs the parameter for your redirect_uri again:
$getStr = self::FB_GRAPH_URL . 'oauth/access_token?' . http_build_query(array(
'client_id' => 'APP_ID',
'redirect_uri' => 'REDIRECT_URI',
'client_secret' => 'SECRET_KEY',
'code' => $fbCode)
);
Then, you can't just take the answer of this call as your access_token, as there is much more in it:
access_token=USER_ACCESS_TOKEN&expires=NUMBER_OF_SECONDS_UNTIL_TOKEN_EXPIRES
and you only want the access_token part of it:
$response = file_get_contents($getStr);
$params = null;
parse_str($response, $params);
$dbpath = "https://graph.facebook.com/me?access_token=" . $params['access_token'];