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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(*types, &block)
raise ArgumentError, "respond_to takes either types or a block, never bot" unless types.any? ^ block
block ||= lambda { |responder| types.each { |type| responder.send(type) } }
responder = Responder.new(block.binding)
block.call(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
def custom(mime_type, *args, &block)
mime_type = mime_type.is_a?(Mime::Type) ? mime_type : Mime::Type.lookup(mime_type.to_s)
@order << mime_type
if block_given?
@responses[mime_type] = block
else
if argument = args.first
eval("__mime_responder_arg__ = #{argument.is_a?(String) ? argument.inspect : argument}", @block_binding)
@responses[mime_type] = eval(DEFAULT_BLOCKS[(mime_type.to_sym.to_s + "_arg").to_sym], @block_binding)
else
@responses[mime_type] = eval(DEFAULT_BLOCKS[mime_type.to_sym], @block_binding)
end
end
end
for mime_type in %w( all html js xml rss atom yaml )
eval <<-EOT
def #{mime_type}(argument = nil, &block)
custom(Mime::#{mime_type.upcase}, argument, &block)
end
EOT
end
def any(*args, &block)
args.each { |type| send(type, &block) }
end
def respond
for priority in @mime_type_priority
if priority == Mime::ALL
@responses[@order.first].call
return
else
if priority === @order
@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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