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module ActionController #:nodoc:
module MimeResponds #:nodoc:
def self.included(base)
base.send(:include, ActionController::MimeResponds::InstanceMethods)
end
module InstanceMethods
def respond_to(&block)
responder = Responder.new(block.binding)
yield responder
responder.respond
end
end
class Responder #:nodoc:
DEFAULT_BLOCKS = {
:html => 'Proc.new { render }',
:js => 'Proc.new { render :action => "#{action_name}.rjs" }',
:xml => 'Proc.new { render :action => "#{action_name}.rxml" }',
:xml_arg => 'Proc.new { render :xml => __mime_responder_arg__ }'
}
def initialize(block_binding)
@block_binding = block_binding
@mime_type_priority = eval("request.accepts", block_binding)
@order = []
@responses = {}
end
for mime_type in %w( all html js xml rss atom yaml )
eval <<-EOT
def #{mime_type}(argument = nil, &block)
@order << Mime::#{mime_type.upcase}
if block_given?
@responses[Mime::#{mime_type.upcase}] = block
else
if argument
eval("__mime_responder_arg__ = " + (argument.is_a?(String) ? "'" + argument + "'" : argument), @block_binding)
@responses[Mime::#{mime_type.upcase}] = eval(DEFAULT_BLOCKS[(Mime::#{mime_type.upcase}.to_sym.to_s + "_arg").to_sym], @block_binding)
else
@responses[Mime::#{mime_type.upcase}] = eval(DEFAULT_BLOCKS[Mime::#{mime_type.upcase}.to_sym], @block_binding)
end
end
end
EOT
end
def respond
for priority in @mime_type_priority
if priority == Mime::ALL
@responses[@order.first].call
return
else
if @order.include?(priority)
@responses[priority].call
return # mime type match found, be happy and return
end
end
end
if @order.include?(Mime::ALL)
@responses[Mime::ALL].call
else
eval 'render(:nothing => true, :status => "406 Not Acceptable")', @block_binding
end
end
end
end
end
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