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そうだ Rack 作ろう。
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rince
July 30, 2014
Programming
2
94
そうだ Rack 作ろう。
社内勉強会でRackについて説明した際の資料です。
rince
July 30, 2014
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Transcript
ͦ ͏ ͩ R a c k ࡞ Ζ ͏
ɻ
5PEBZ`T(PBM w 3BDLͱԿ͔ཧղ͢Δ w 3BDLΞϓϦϛυϧΣΞΛ࡞ΕΔΑ͏ʹͳΔ
"HFOEB 3BDLͱ 3BDLΞϓϦΛ࡞ͬͯΈΑ͏ 3BDLϛυϧΣΞΛ࡞ͬͯΈΑ͏ (FNʹͯ͠ΈΑ͏ʢ͓·͚ʣ
6OJDPSOͰಈ͔ͯ͠ΈΑ͏ʢ͓·͚ʣ
3BDLͱ
3BDLͱ 3VCZΛαϙʔτ͢Δ8FC "1 αʔόͱ 3VCZϑϨʔϜϫʔΫͱΛͭͳ͙ن 1ZUIPOͷ84(*ΛݩʹఏҊ͞Εͨ
3BDLͷׂ Passenger Unicorn Thin Mongrel Rails Sinatra Ramaze Merb Application
Server Framework ΠϯλʔϑΣʔεͷ౷ҰʹΑΓɺ ϑϨʔϜϫʔΫʗAPαʔόؒͷΈ߹ΘͤΛࣗ༝ʹ͢Δ
3BDLΞϓϦΛ࡞ͬͯΈΑ͏
! wDBMMͱ͍͏ϝιουΛ͍࣋ͬͯΔ͜ͱ wDBMMϝιουͷҾͱͯ͠8FCαʔό͔ΒͷϦΫΤετ Λड͚Δ͜ͱ wDBMMϝιουҎԼͷཁૉΛؚΉϨεϙϯεΛฦ͢͜ͱ εςʔλείʔυ Ϩεϙϯεϔομʢ)BTIʣ
ϨεϙϯεϘσΟʢ"SSBZʣ 3BDLΞϓϦέʔγϣϯ
3BDLΞϓϦΛ࡞ͬͯΈΑ͏ class RackApp def call(env) [200, {'Content-Type' => 'text/html'}, ["Hello,
Rack world!"]] end end run RackApp.new DPOpHSV ! $ rackup config.ru
3BDLϛυϧΣΞΛ ࡞ͬͯΈΑ͏
3BDLϛυϧΣΞ 3BDLʹରԠͨ͠ΞϓϦέʔγϣϯʹ ػೳΛՃ͢ΔͨΊͷϛυϧΣΞ ! w3BDLΞϓϦέʔγϣϯͷ༷Λຬ͍ͨͯ͠Δ͜ͱ wOFXͷୈҰҾʹଞͷ3BDLΞϓϦέʔγϣϯΛऔΔ͜ͱ
3BDLϛυϧΣΞΛ࡞ͬͯΈΑ͏ class UpcaseAll def initialize(app) @app = app end def
call(env) code, headers, body = @app.call(env) body.each {|part| part.upcase! } [code, headers, body] end end class RackApp #... end use UpcaseAll run RackApp.new DPOpHSV
3BDLϛυϧΣΞͷೖΕࢠߏ
Α͘͏3BDLϥΠϒϥϦ w3BDL3FRVFTU ϦΫΤετΛѻ͍ͯ͘͘͢͠ΕΔϥούʔ w3BDL3FTQPOTF ϨεϙϯεΛѻ͍ͯ͘͘͢͠ΕΔϥούʔ w3BDL63-.BQ ύεʹԠͯ͡ϦΫΤετΛৼΓ͚ͯ͘ΕΔΞϓϦέʔγϣϯ ! ‣ࢀߟɿIUUQSPVUFOFUX3BDL3FGFSFODF+BIUNM
ʲԋशʳ ! ͜Ε·ͰֶΜͩ͜ͱΛ౿·͑ͯɺ ΦϦδφϧͷ3BDLϛυϧΣΞΛ࡞ͬͯΈΑ͏
(FNʹͯ͠ΈΑ͏
(FNͷ࡞Γํ require "my_first_gem/version" module MyFirstGem class UpcaseAll #... end end
$ bundle gem my_first_gem (FNͷܗΛ࡞Δ ֓ཁΛHFNTQFDʹॻ͘ ϥΠϒϥϦΛॻ͘ (FNΛϏϧυ͢Δ $ rake build
ʲԋशʳ ! ࣗ࡞ͨ͠(FNΛHFNJOBCPYʹΞοϓͯ͠ɺ ଞਓ͕࡞ͬͨ(FNΠϯετʔϧͯ͠ΈΑ͏
6OJDPSOͰಈ͔ͯ͠ΈΑ͏
6OJDPSOͷ͍ํ worker_processes 2 listen 9292 stderr_path File.expand_path('unicorn.log', File.dirname(__FILE__)) stdout_path File.expand_path('unicorn.log',
File.dirname(__FILE__)) pid File.expand_path('unicorn.pid', File.dirname(__FILE__)) $ echo “gem ‘unicorn’” >> Gemfile $ bundle install 6OJDPSOΛΠϯετʔϧ ઃఆϑΝΠϧʢVOJDPSODPOGʣΛ༻ҙ͢Δ 6OJDPSOΛىಈ͢Δ 6OJDPSOΛఀࢭ͢Δ $ kill -QUIT `cat unicorn.pid` $ unicorn -c unicorn.conf -D