除非更改后端TTL，否则Varnish缓存不使用会话缓存PHP [英] Varnish Cache not Caching PHP with Sessions Unless backend TTL altered
问题描述
我是Varnish Cache的新手，我希望有一个问题可以帮助我。
I'm new to Varnish Cache and have a question I hope I can get some help with.
我有一个非常简单且基本的设置，但没有用据我了解
应该出于某种原因。
I have a very simple and basic setup but it's not working as I understand it should for some reason.
这与Varnish没有缓存使用cookie的PHP页面有关。
It's related to Varnish not caching PHP pages that are using cookies.
这是我的设置：
1）对于我的default.vcl，我有一个简单的后端
1) For my default.vcl I have a simple backend
backend default {
.host = "127.0.0.1";
.port = "80";
}
2）我有一个简单的PHP文件，只有以下两行： / p>
2) I have a simple PHP file that has only these two line:
session_start();
echo time();
3）
当我调用此页面时，它不会正确缓存
作为我没有添加必需的vcl规则
3) When I call this page it correctly does not cache as I have not added in the required vcl rules
4）
因此，根据我对文档的理解，在这两个规则中添加
So as per my understanding of the documentation I add in these two rules
sub vcl_recv {
unset req.http.Cookie;
return (lookup);
}
sub vcl_fetch {
unset beresp.http.Set-Cookie;
return(deliver);
}
5）
PHP页面仍然不会缓存。
我可以看到 Set-Cookie 标头已被删除
，因为我在FireFox中使用FireBug。
5)
The PHP page still will not cache.
I can see the Set-Cookie header has been
removed as I'm using FireBug in FireFox.
只有将其添加到sub vcl_fetch
中，PHP才会缓存：
It's only if I add this to sub vcl_fetch that the PHP will cache:
set beresp.ttl = 24h;
我的问题是否正确？
我认为我不需要更改后端响应的ttl
。我以为只是取消输入和退出
cookie就会迫使带有会话的PHP缓存。
I didn't think I would need to alter the ttl of the backend response. I thought just unsetting cookies in and out would force PHP w/ session to cache.
我完整的默认vcl是：
My complete default vcl is:
backend default {
.host = "127.0.0.1";
.port = "80";
}
sub vcl_recv {
unset req.http.Cookie;
return (lookup);
}
sub vcl_fetch {
unset beresp.http.Set-Cookie;
set beresp.ttl = 24h;
return(deliver);
}
我的启动命令是：
varnishd -f /etc/varnish/default.vcl -s malloc,128M -T 127.0.0.1:2000 -a 0.0.0.0:8080
我正在呼叫的网址是：
http://vbox.local:8080/varnish-tests/index.php
我的index.php文件只有：
My index.php file has only:
<?php
session_start();
echo time();
我想问社区，这看起来是否正确，或者我错了。本质上，我只是不确定为什么要有
来添加beresp.ttl = 24h来最终使页面缓存
上清漆。
I would like to ask the community if this looks correct or if I am wrong. Essentially I'm just unsure why I had to add the beresp.ttl = 24h to finally have the page cache in varnish.
I认为我不需要这个。
I thought I would not need this.
任何建议都值得赞赏。
Any advise much appreciated.
谢谢！
亲切的问候。
推荐答案
Varnish将服从响应中的缓存标头。 PHP将发送缓存控制标头，而不按默认值
Varnish will obey the caching headers on the response. PHP will send cache-control headers NOT to cache the response by deafult
Cache-Control:no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma:no-cache
您需要禁用这些标头，否则Varnish将服从并因此不缓存页面。要关闭它们，只需使用空字符串调用session_cache_limiter（）
You need to disable those headers otherwise Varnish will obey and thus not cache the page. To turn them off simply call session_cache_limiter() with an empty string
session_cache_limiter('');
header("Cache-Control: public, s-maxage=60");
session_start();
然后可以添加标头，将缓存控件设置为public。使用上面的三行将启用缓存。
You can then add a header to set the cache-control to public. Using the three lines above will enable caching.
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