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Web Server App Server IUUQ DBMMSVCZ DBMMBQQ Your App

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call(env)

def call(env) ... end 3FRVFTUΛ౉͞ΕΔ 3FTQPOTFΛฦ͢ [status, headers, response_body]

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# Rack call interface. def call(env) dup.call!(env) end attr_accessor :env, :request, :response, :params def call!(env) # :nodoc: @env = env @request = Request.new(env) @response = Response.new @params = indifferent_params(@request.params) template_cache.clear if settings.reload_templates force_encoding(@params) @response['Content-Type'] = nil invoke { dispatch! } invoke { error_block!(response.status) } unless @response['Content-Type'] if Array === body and body[0].respond_to? :content_type content_type body[0].content_type else content_type :html end end @response.finish end

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#config.ru require ‘rack’ require ‘myapp’ run MyApp.new 3BDL"QQMJDBUJPO JFJNQMFNFOUTcall(env)

# Minimum config.ru require ‘rack’ run lambda { |env| [200, { "Content-Type" => "text/plain" }, ["OK"] ] } TUBUVT IFBEFST CPEZ

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Web Server App Server IUUQ DBMMSVCZ Your App BQBDIFOHJOYFUD QBTTFOHFSNPOHSFMUIJOFUD 3BDL*' 3BDL"QQMJDBUJPO Middleware Middleware 3BDL*' 3BDL*' .JEEMFXBSFΛૠೖ ^

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class Middleware def initialize(app) @app = app end def call(env) # do something response = @app.call(env) # do something end end ࣍ʹݺͿ"QQ.JEEMFXBSF 3FRVFTUΛ͍͡Δ 3FTQPOTFΛ͍͡Δ

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def call(env) unless env['rack.session'] raise SessionUnavailable.new('Rack::Csrf depends on session middleware') end self.class.token(env) req = Rack::Request.new(env) untouchable = skip_checking(req) || !@http_methods.include?(req.request_method) || req.params[self.class.field] == env['rack.session'][self.class.key] || req.env[self.class.rackified_header] == env['rack.session'][self.class.key] if untouchable @app.call(env) else raise InvalidCsrfToken if @raisable [403, {'Content-Type' => 'text/html', 'Content-Length' => '0'}, []] end end $43'νΣοΫࣦഊͨ͠Βɺ ͙͢ʹ3FTQPOTFฦ͢ 3FRVFTUʹ$43'ରࡦUPLFOΛνΣοΫ ௨ͬͨΒɺͦͷ··࣍΁

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#config.ru require ‘rack’ require ‘myapp’ class Middleware def initialize(app) @app = app end def call(env) env["rack.some_header"] = "setting an example" @app.call(env) end end use Middleware run MyApp.new 3BDL಺෦Ͱ!VTF഑ྻʹૠೖ 3BDL#VJMEFSʹCJOE͞ΕͯΔ