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021f3d24f3
Assuming the type ":touch", Collector.new was calling send(:touch), which instead of triggering method_missing and generating a new collector method, actually invoked the private method `touch` inherited from Object. By generating the method for each mime type as it is registered, the private methods on Object can never be reached by `send`, because the `Collector` will have them before `send` is called on it. To do this, a callback mechanism was added to Mime::Type This allows someone to add a callback for whenever a new mime type is registered. The callback then gets called with the new mime as a parameter. This is then used in AbstractController::Collector to generate new collector methods after each mime is registered.
36 lines
1,017 B
Ruby
36 lines
1,017 B
Ruby
require "action_dispatch/http/mime_type"
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module AbstractController
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module Collector
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def self.generate_method_for_mime(mime)
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sym = mime.is_a?(Symbol) ? mime : mime.to_sym
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const = sym.upcase
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class_eval <<-RUBY, __FILE__, __LINE__ + 1
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def #{sym}(*args, &block) # def html(*args, &block)
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custom(Mime::#{const}, *args, &block) # custom(Mime::HTML, *args, &block)
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end # end
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RUBY
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end
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Mime::SET.each do |mime|
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generate_method_for_mime(mime)
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end
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Mime::Type.register_callback do |mime|
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generate_method_for_mime(mime) unless self.instance_methods.include?(mime.to_sym)
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end
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protected
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def method_missing(symbol, &block)
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mime_constant = Mime.const_get(symbol.upcase)
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if Mime::SET.include?(mime_constant)
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AbstractController::Collector.generate_method_for_mime(mime_constant)
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send(symbol, &block)
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else
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super
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end
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end
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end
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end
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