Criando um Framework com Rack em 10 minutos

class HelloWorld def call(env) [200, {"Content-Type" => "text/plain"}, ["Hello World!"]] endend

class UpcaseMiddleware def initialize(app) @app = app end def call(env) status, headers, response = @app.call(env) response.upcase! [status, headers, response] endend

#app.rurequire "framework"get "/user" do @name = "User Name" erb :viewendhome = get "/" do "Home"endrun home

#view.erbOlá <%= @name %>

#framework.rbrequire "erb"def get(action, &block) middleware = Class.new middleware.send(:define_method,initialize) do |app| @app = app end def erb(view_name) view = File.read("#{view_name.to_s}.erb") body = ERB.new(view) body.result(binding) end

middleware.send(:define_method, "call") do |env| request = Rack::Request.new(env) response = Rack::Response.new if request.path_info == action response.write(get_block) response.finish else @app.call(env) end end middleware.send(:define_method, "get_block", &block) use middleware use Rack::Staticend

1) rackup app.ru2) Acessar localhost:9292 #=> Home3) Acessar localhost:9292/user #=> Olá User

http://www.gonow.com.br	602
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http://rinaldifonseca.com	123
http://blog.gonow.com.br	12
http://us-w1.rockmelt.com	7
http://twitter.com	5
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Criando um Framework com Rack em 10 minutos

by rinaldifonseca on Sep 03, 2011

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Criando um Framework com Rack em 10 minutos — Presentation Transcript