为特定图像添加过期标头
我看过的所有过期标题文章或多或少都提供了以下解决方案：
ExpiresByType image/gif A2592000
ExpiresByType image/png A2592000
ExpiresByType image/jpg A2592000
ExpiresByType image/jpeg A2592000
但这对我来说没有意义，因为我知道哪些图像会改变，哪些不会改变，所以我想能够将特定的到期日期添加到特定的图像文件。我该怎么办呢？
All of the expires headers articles I've looked at give more or less the following solution:
ExpiresByType image/gif A2592000
ExpiresByType image/png A2592000
ExpiresByType image/jpg A2592000
ExpiresByType image/jpeg A2592000
But it doesn't make sense to me because I know which of my images are going to change and which aren't, so I want to be able to add specific expiration dates to specific image files. How would I go about this?
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您可以使用
FilesMatch，例如。或者对于某些特定文件：
You can use a
FilesMatch, eg.Or for some specific files:
请注意，如果您已经使用了
ExpiresByType，则对特定文件使用ExpiresDefault将不起作用。您需要再次使用ExpiresByType。所以这不起作用（
service-worker.js仍然有 +1 年的有效期）：但这会起作用（
service-worker.js将有 +0 秒的有效期)：您还可以使用
Header unset Expires。无论上面设置了什么，这都会删除Expires标头。您还应该修改（或删除）Cache-Control标头。看来 mod_expires 两者都设置了。Note that using
ExpiresDefaultfor specific files will not work if you already usedExpiresByType. You need to useExpiresByTypeagain.So this will NOT work (
service-worker.jswould still have +1 year expiry):But this will work (
service-worker.jswill have +0 seconds expiry):You might also use
Header unset Expires. This would removeExpiresheader no matter what was set above it. You should also modify (or remove)Cache-Controlheader. It seems thatmod_expiressets both.