Notes posted by loop

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January 27, 2010
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Alternative hostname generation method

Instead of using a random number to generate the hostname for the single asset, I prefer using source.hash.modulo, so that a given file is always served from the same host. This makes the content more cacheable by browsers and proxies.

ActionController::Base.asset_host = Proc.new { |source|
  "http://assets#{ source.hash.modulo(9) }.example.com"

I didn’t benchmark how long it takes, but String#hash should be reasonably fast.