IMP_Contents_View::checkToken PHP Method

    public function checkToken(Horde_Variables $vars)
    {
        $GLOBALS['session']->checkToken($vars->get(self::VIEW_TOKEN_PARAM));
    }

Horde_Registry::appInit('imp', array('session_control' => 'readonly'));
$vars = $injector->getInstance('Horde_Variables');
/* Run through action handlers */
switch ($vars->actionID) {
    case 'compose_attach_preview':
        $view_ob = new IMP_Compose_View($vars->composeCache);
        $res = $view_ob->composeAttachPreview($vars->id, true, $vars->ctype);
        break;
    case 'print_attach':
        $view_ob = new IMP_Contents_View(new IMP_Indices_Mailbox($vars));
        $view_ob->checkToken($vars);
        $res = $view_ob->printAttach($vars->id);
        break;
    case 'view_attach':
        $view_ob = new IMP_Contents_View(new IMP_Indices_Mailbox($vars));
        $view_ob->checkToken($vars);
        $res = $view_ob->viewAttach($vars->id, $vars->mode, $vars->autodetect, $vars->ctype);
        break;
    case 'view_source':
        $view_ob = new IMP_Contents_View(new IMP_Indices_Mailbox($vars));
        $res = $view_ob->viewSource();
        break;
}
if (empty($res)) {
    exit;
}
if (is_resource($res['data'])) {
    fseek($res['data'], 0, SEEK_END);
    $size = ftell($res['data']);
} else {
    $size = strlen($res['data']);