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Last active October 9, 2024 00:33
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Apache: Detecting WebP support with Header Vary Accept
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.htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_ACCEPT} image/webp
RewriteCond %{DOCUMENT_ROOT}/$1.webp -f
RewriteRule (.+)\.(jpe?g|png)$ $1.webp [T=image/webp,E=accept:1]
</IfModule>
<IfModule mod_headers.c>
Header append Vary Accept env=REDIRECT_accept
</IfModule>
AddType image/webp .webp
@jslegers
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jslegers commented Dec 9, 2015

What exactly is this code supposed to do?

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