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Retina.js triggers 404 errors on non existent @2x images



If you noticed lots of 404 errors due to requests to images that look like /something/imagename@2x.png - you have two options:
  1. Upload the proper @2x retina version of the images. This is the preferred method, or
  2. Apply the hack described here
You can simply redirect the requests for the @2x files to the corresponding non @2x files using Apache's mod_rewrite. Add this to your .htaccess file:
#QH MOD BEGIN
#This block of code needs to go above your Wordpress rules
<IfModule rewrite_module>
#This is to short circuit non existent Retina image requests generated by retina.js
# without this, the whole wordpress 404 stack will be executed which is very expensive
# We simply redirect the request to the non @2x version of the file, if one exists, otherwise, send a 404 status
RewriteEngine on
RewriteBase /
RewriteCond %{REQUEST_FILENAME} @2x\.[a-z]+$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)@2x(.*)$ $1$2 [E=QHNORETINA:1]
RewriteCond %{ENV:QHNORETINA} 1
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule .* - [L,R=404]
</IfModule>
#QH MOD END


Article Details
Article ID: 222
Created On: 10 Jul 2015 09:58 AM
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