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Apache Expires 不工作？

tag-icon • tag-icon apache-2.4 virtualhost
Apache Expires 不工作？

我正在尝试配置 Apache 浏览器缓存，但它似乎有一半时间不起作用。

这是我的虚拟主机配置：

<IfModule mod_ssl.c>
    <VirtualHost *:443>
        ServerName example.com

        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/example

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        <Directory /var/www/example>
                <IfModule mod_expires.c>
                    <FilesMatch ".+\.(jpe?g|png|gif|js|css|woff|woff2|svg|eot|ttf)$">
                        ExpiresActive On
                        ExpiresDefault "access plus 2 weeks"
                    </FilesMatch>
                </IfModule>

                Options Indexes FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all

        </Directory>

        RewriteEngine on

        SSLCertificateFile /etc/letsencrypt/live/example.com/fullchain.pem
        SSLCertificateKeyFile /etc/letsencrypt/live/example.com/privkey.pem
        Include /etc/letsencrypt/options-ssl-apache.conf
    </VirtualHost>
</IfModule>

这是一个卷曲测试：

$ date -u
Fri 11 Aug 2017 00:00:47 UTC

$ curl -s -v -o /dev/null  https://example.com/logo.png
*   Trying 34.227.118.252...
* TCP_NODELAY set
* Connected to example.com (34.227.118.252) port 443 (#0)
* TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate: example.com
* Server certificate: Let's Encrypt Authority X3
* Server certificate: DST Root CA X3
> GET /logo.png HTTP/1.1
> Host: example.com
> User-Agent: curl/7.51.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Date: Fri, 11 Aug 2017 00:02:06 GMT
< Server: Apache/2.4.18 (Ubuntu)
< Content-Length: 2527
< Accept-Ranges: bytes
< X-Original-Content-Length: 2696
< Etag: W/"PSA-aj-_N7_D464wY"
< Expires: Fri, 11 Aug 2017 00:06:01 GMT         # <---- ??
< Cache-Control: max-age=234
< X-Content-Type-Options: nosniff
< Content-Type: image/png
<
{ [2527 bytes data]
* Curl_http_done: called premature == 0
* Connection #0 to host example.com left intact

Expires 标签仅表示未来几分钟的时间，而根据 vhost 配置，它应该是 2 周后到期。

奇怪的是，在浏览器中测试一些图像做发送时带有正确的有效期，但同一服务器虚拟主机中的其他虚拟主机却没有。mod_pagespeed 已启用，但我认为这不会改变什么？有什么想法吗？

Apache/2.4.18（Ubuntu）

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