.htaccess HTTP Expires标头不适用于某些图像

Question

我在Apache Web服务器上有一个wordpress网站，我在.htaccess文件中设置了Image Expires Tags，这是我放在.htaccess文件中的代码，

<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/css A31536000
ExpiresByType text/x-component A31536000
ExpiresByType application/x-javascript A31536000
ExpiresByType application/javascript A31536000
ExpiresByType text/javascript A31536000
ExpiresByType text/x-js A31536000
ExpiresByType text/html A3600
ExpiresByType text/richtext A3600
ExpiresByType image/svg+xml "access plus 1 month"
ExpiresByType text/plain A3600
ExpiresByType text/xsd A3600
ExpiresByType text/xsl A3600
ExpiresByType text/xml A3600
ExpiresByType video/asf A31536000
ExpiresByType video/avi A31536000
ExpiresByType image/bmp A31536000
ExpiresByType application/java A31536000
ExpiresByType video/divx A31536000
ExpiresByType application/msword A31536000
ExpiresByType application/vnd.ms-fontobject A31536000
ExpiresByType application/x-msdownload A31536000
ExpiresByType image/gif "access plus 1 month"
ExpiresByType application/x-gzip A31536000
ExpiresByType image/x-icon A31536000
ExpiresByType image/jpeg A31536000
ExpiresByType application/json A31536000
ExpiresByType application/vnd.ms-access A31536000
ExpiresByType audio/midi A31536000
ExpiresByType video/quicktime A31536000
ExpiresByType audio/mpeg A31536000
ExpiresByType video/mp4 A31536000
ExpiresByType video/mpeg A31536000
ExpiresByType application/vnd.ms-project A31536000
ExpiresByType application/x-font-otf A31536000
ExpiresByType application/vnd.ms-opentype A31536000
ExpiresByType application/vnd.oasis.opendocument.database A31536000
ExpiresByType application/vnd.oasis.opendocument.chart A31536000
ExpiresByType application/vnd.oasis.opendocument.formula A31536000
ExpiresByType application/vnd.oasis.opendocument.graphics A31536000
ExpiresByType application/vnd.oasis.opendocument.presentation A31536000
ExpiresByType application/vnd.oasis.opendocument.spreadsheet A31536000
ExpiresByType application/vnd.oasis.opendocument.text A31536000
ExpiresByType audio/ogg A31536000
ExpiresByType application/pdf A31536000
ExpiresByType image/png "access plus 1 month"
ExpiresByType application/vnd.ms-powerpoint A31536000
ExpiresByType audio/x-realaudio A31536000
ExpiresByType image/svg+xml "access plus 1 month"
ExpiresByType application/x-shockwave-flash A31536000
ExpiresByType application/x-tar A31536000
ExpiresByType image/tiff A31536000
ExpiresByType application/x-font-ttf A31536000
ExpiresByType application/vnd.ms-opentype A31536000
ExpiresByType audio/wav A31536000
ExpiresByType audio/wma A31536000
ExpiresByType application/vnd.ms-write A31536000
ExpiresByType application/font-woff A31536000
ExpiresByType application/vnd.ms-excel A31536000
ExpiresByType application/zip A31536000</IfModule>

但是当我在seositecheckup.com上查看Expire标头测试的网站时，它仍然显示一些没有“Expires”标题的图像。

上面的代码有什么问题吗？任何帮助，将不胜感激。谢谢！

Answer 1

这些图像似乎是数据uris。这意味着它们嵌入在html，css或javascript中，因此从未直接由Apache提供。因此，Apache无法在其上设置过期标记。只要这些uris来自的文件具有正确的过期标记，这些资产就会在用户的浏览器中正确到期。

然而，如果你对他们的测试得分很高兴，那么你就会因为他们提倡使用数据uris和expires标签而运气不好。据我所知，这些是相互排斥的。

只要你的所有html，css＆amp; js文件正确到期您正确地使这些资产到期。