我们的Symfony项目有一个登录小部件,有人告诉我应该通过AJAX加载该小部件,以免干扰页面缓存。
它显示“登录”,或者显示用户的电子邮件地址(如果他已经登录)。
问题是,树枝模板也被缓存了!因此,通过ajax加载它没有帮助。
如何告诉Twig每次从头开始渲染我的模板,而不禁用整个站点的缓存?
模板本身非常简单:
<small id="login-username">
{% if is_granted('ROLE_USER') %}
{{ app.user.username }}
{% else %}
{{ 'LoginWidgetElement.login' | trans }}
{% endif %}
</small>
元素的类也很简单:
<?php
namespace Xyz\Sports\Element\LoginWidget;
use Xyz\Library\AbstractElement;
use Sensio\Bundle\FrameworkExtraBundle\Configuration as Config;
/**
* @Config\Template("@LoginWidgetElement/login_widget.html.twig")
*/
class LoginWidgetElement extends AbstractElement
{
public function render()
{
return [];
}
public function renderPreview()
{
return $this->render();
}
}
更新
树枝模板似乎正在检查,因此我尝试发送一个响应,告诉浏览器不要缓存,但是在变量更改之前它仍然需要大约15个请求!!
细枝缓存:
<small id=\"login-username\">
";
// line 9
if ($this->extensions['Symfony\Bridge\Twig\Extension\SecurityExtension']->isGranted("ROLE_USER")) {
// line 10
echo " ";
echo twig_escape_filter($this->env, twig_get_attribute($this->env, $this->source, twig_get_attribute($this->env, $this->source, (isset($context["app"]) || array_key_exists("app", $context) ? $context["app"] : (function () { throw new Twig_Error_Runtime('Variable "app" does not exist.', 10, $this->source); })()), "user", array()), "username", array()), "html", null, true);
echo "
";
} else {
// line 12
echo " ";
echo twig_escape_filter($this->env, $this->extensions['Symfony\Bridge\Twig\Extension\TranslationExtension']->trans("LoginWidgetElement.login"), "html", null, true);
echo "
";
}
// line 14
echo " </small>
因此有一个isGranted('ROLE_USER')
支票。现在,在我的渲染方法中:
$response = new Response();
$response->headers->set('Cache-Control', 'no-store, no-cache, must-revalidate, max-age=0, post-check=0, pre-check=0');
$response->headers->set('Pragma', 'no-cache');
$body = $this->twig->render('@LoginWidgetElement/login_widget.html.twig');
$response->setContent($body);
return $response;
但是仍然没有雪茄:'-(
答案 0 :(得分:1)
好像设置缓存头有它自己的方法,我们不应该只使用$response->headers->set($key, $val);
我将逻辑转换为可重用的特征:
<?php
namespace Xyz\Library\Traits;
use Symfony\Component\HttpFoundation\Response;
trait NoCacheHeadersTrait
{
public function disableBrowserCache(Response $response) : Response
{
$response->headers->addCacheControlDirective('no-store', true);
$response->headers->addCacheControlDirective('no-cache', true);
$response->headers->addCacheControlDirective('must-revalidate', true);
$response->headers->addCacheControlDirective('max-age', 0);
$response->headers->addCacheControlDirective('post-check', 0);
$response->headers->addCacheControlDirective('pre-check', 0);
$response->headers->set('Pragma', 'no-cache');
return $response;
}
}
现在我use
在类中的特征,在我的render方法中,它现在看起来像这样:
public function render()
{
$response = $this->disableBrowserCache(new Response());
$body = $this->twig->render('@LoginWidgetElement/login_widget.html.twig');
$response->setContent($body);
return $response;
}