include_spip('inc/headers'); 
    
    $oauth_state = session_get('oauth_state');
    $url = "http://oa.dnc.global/authorize?response_type=code&client_id=chemin_openid&scope=openid profile&redirect_uri=http://chemindeleau.com/callback_openid.php&state=$oauth_state";
    
redirige_par_entete($url);