kanoko is an active image generate application.

require 'kanoko/application/convert'

class MyApp < Kanoko::Application::Convert
end

run MyApp

$ KANOKO_DIGEST_FUNC=sha1 KANOKO_SECRET_KEY=devkey unicorn --config-file config/unicorn/development.rb

http://{{kanoko.host}}/:hash/:func/:args/:path

• hash: params signature (see also Signature)
• func: a function name of image processing (e.g. fit)
• args: image processing arguments (e.g. "100x100")
• path: Target image path without scheme (e.g. "host/path/to/image?params_a=value_a")

hash is changeable.

By default, see Kanoko::Configure#initialize.

On application, It must be set hash same way as this.

If hash not match, application should be return 400 Bad Request.

This function behavior can change by Kanoko.configure.

Kanoko.configure.hash_proc = ->{
  "some_hash_value_on_url"
}

• To be able to change digest_func and secret_key on graceful restart
• More fast