1

基本

我做了一个非常简单的测试动作：

/**
 * @Route("/public/debug/varnish", name="debug_varnish")
 * @Template
 */
public function varnishAction()
{
    return [];
}

{# varnish.html.twig #}
<html>
<body>
    <h1>Layout</h1>
    <hr />
    {{ render_esi(controller('TestBundle:Debug:esi')) }}
</body>
</html>

包含的动作和树枝现在并不重要。

考试

Varnish 需要Surrogate-Control: content="ESI/1.0"响应中的标头。看看会发生什么：

curl -H 'host:www.domain.com' -H 'Surrogate-Capability: abc=ESI/1.0' http://127.0.0.1:8080/public/debug/varnish

响应：

<html>
<body>
    <h1>Layout</h1>
    <hr />
    <esi:include src="/_proxy?_path=_format%3Dhtml%26_locale%3Den_US%26_controller%3DTestBundle%253ADebug%253Aesi" onerror="continue" />
</body>
</html>

一切安好！但看看标题：

curl -I -H 'host:www.domain.com' -H 'Surrogate-Capability: abc=ESI/1.0' http://127.0.0.1:8080/public/debug/varnish

输出：

HTTP/1.1 200 OK
Server: nginx/1.2.1
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/5.5.9-1~dotdeb.1
Set-Cookie: PHPSESSID=k8jii3gkrha1js7edbbbqjjh32; path=/
Cache-Control: no-cache
Date: Tue, 18 Feb 2014 11:21:04 GMT

没有Surrogate-Control标题！

\Symfony\Component\HttpKernel\HttpCache\Esi 类

有一个非常非常简单的函数，如果内容包含字符串，则添加Surrogate-Control标题：<esi:include

/**
 * Adds HTTP headers to specify that the Response needs to be parsed for ESI.
 *
 * This method only adds an ESI HTTP header if the Response has some ESI tags.
 *
 * @param Response $response A Response instance
 */
public function addSurrogateControl(Response $response)
{
    if (false !== strpos($response->getContent(), '<esi:include')) {
        $response->headers->set('Surrogate-Control', 'content="ESI/1.0"');
    }
}

但事实并非如此！如果是“真”。当我用这个打电话时：

public function addSurrogateControl(Response $response)
{
    var_dump(false !== strpos($response->getContent(), '<esi:include'));
    if (false !== strpos($response->getContent(), '<esi:include')) {
        echo "before add header\n";
        $response->headers->set('Surrogate-Control', 'content="ESI/1.0"');
        echo "after add header\n";
    }
    echo "after if"
}

curl -H 'host:www.domain.com' -H 'Surrogate-Capability: abc=ESI/1.0' http://127.0.0.1:8080/public/debug/varnish

响应：

(bool) true
before add header
after add header
after if
<html>
<body>
    <h1>Layout</h1>
    <hr />
    <esi:include src="/_proxy?_path=_format%3Dhtml%26_locale%3Den_US%26_controller%3DTestBundle%253ADebug%253Aesi" onerror="continue" />
</body>
</html>

curl -I -H 'host:www.domain.com' -H 'Surrogate-Capability: abc=ESI/1.0' http://127.0.0.1:8080/public/debug/varnish

输出：

HTTP/1.1 200 OK
Server: nginx/1.2.1
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/5.5.9-1~dotdeb.1
Set-Cookie: PHPSESSID=k8jii3gkrha1js7edbbbqjjh32; path=/
Cache-Control: no-cache
Date: Tue, 18 Feb 2014 11:21:04 GMT

标题在哪里Surrogate-Control？:-o

更多测试：

public function addSurrogateControl(Response $response)
{
    // [1]
    if (false !== strpos($response->getContent(), '<esi:include')) {
        // [2]
    }
    // [3]
}

和$response->headers->set('Surrogate-Control', 'content="ESI/1.0"');(!!!) header('Test: test OK')：

  • [1] 地点：工作！
  • [2]原来的地方：不起作用:(
  • [3] 地点：工作！

好的。因此，如果任何标头修改位于 中IF，则它不起作用。为什么？

魔法

当我改变条件$response->getContent()时'test <esi:include test'，if一切正常。类Response函数getContent()：

public function getContent()
{
    return $this->content;
}

我不明白 ：-/

4

0 回答 0