OCA\Richdocuments\Controller\SettingsController::setSettings PHP Method

    public function setSettings($wopi_url)
    {
        if (!is_null($wopi_url)) {
            $this->appConfig->setAppValue('wopi_url', $wopi_url);
        }
        $richMemCache = \OC::$server->getMemCacheFactory()->create('richdocuments');
        $richMemCache->clear('discovery.xml');
        $response = array('status' => 'success', 'data' => array('message' => (string) $this->l10n->t('Saved')));
        return $response;
    }