RubyのOSSコードリーディング / ruby-oss-code-reading

Transcript

1. ࣌ాཧ
   
   (.0
   1FQBCP
   *OD
   
   ࣛࣇౡ3VCZձٞ 3VCZͷ044
   ίʔυϦʔσΟϯά
2. J048FCΞϓϦέʔγϣϯΤϯδχΞ ࣌ా
   ཧ
   
   !PTBNUJNJ[FS 46;63*ࣄۀ෦
   ϓϩμΫτνʔϜ
3. ͸͡Ίʹ wൃදࢿྉ͸ޙ΄ͲΠϯλʔωοτ্Ͱެ։͠·͢
   wIUUQTTQFBLFSEFDLDPNPTBNUJNJ[FS
4. ࠓ೔࿩͢͜ͱ wίʔυϦʔσΟϯάͱ͸
   w3VCZ
   044ͷίʔυϦʔσΟϯάΛ࢝Ί͖͔͚ͨͬ
   wίʔυϦʔσΟϯάͷ΍Γํ
   wͲͷΑ͏ʹಡΜ͔ͩ
   wಡΜͰɺมΘͬͨ͜ͱ
5. ίʔυϦʔσΟϯάͱ͸
6. ཁ͢ΔʹɺίʔυΛಡΉ
7. ͚ͩͰ͸ͳ͍
8. ಡΉ͜ͱʹΑͬͯɺ
   ιϑτ΢ΣΞͷ஌ݟΛਂΊΔ ίʔυϦʔσΟϯάͷ໨త
9. ಡΈ࢝Ί͖͔͚ͨͬ
10. ಡΈ࢝Ί͖͔͚ͨͬ w3BJMTΞϓϦΛۀ຿Ͱ։ൃ͍ͯ͠Δ
    wʮͲ͏΍ͬͯಈ͍͍ͯΔΜͩΖ͏ʁʯͱࢥ͏ॠ͕ؒଟ͍
    w͡Ό͋ɺ3BJMTͰ࢖ΘΕ͍ͯΔ044ΛಡΜͰΈΑ͏
11. ίʔυϦʔσΟϯάͷ΍Γํ ࣗݾྲྀʂ
12. ίʔυϦʔσΟϯάͷ΍Γํ wʮ͜͏͠ͳ͚Ε͹͍͚ͳ͍ʯͱ͍͏ͷ͸ͳ͍
    wείʔϓΛܾΊΔ
    wϝΠϯͷػೳΛɺ࢝Ί͔ΒऴΘΓ·Ͱ
    wෳ਺ਓͰಡΉ
    wυϥΠόʔΛҰਓܾΊͯɺϞϒϓϩܗࣜͰਐΊΔ
    
13. ίʔυϦʔσΟϯάͷ༷ࢠ
14. ίʔυϦʔσΟϯά
    ͓͢͢Ίπʔϧ
15. (JU)VC ͦΕ͸ͦ͏
16. (JU)VC 8FCϒϥ΢β Ͱ΋ɺ
    ݁ߏಡΈ΍͍͢
17. +VNQ
    UP
    %FpOJUJPO ΫϦοΫͰϝιουͷఆٛ΁
18. 'JMF
    TFBSDI
    JO
    3FQPTJUPSZ ϦϙδτϦͷͲ͜Ͱ΋ɺUΩʔͰىಈ
19. 'JMF
    TFBSDI
    JO
    3FQPTJUPSZ wಛʹ3VCZͱ૬ੑ͕ྑ͍
    wSFRVJSFͰࢦఆ͢Δͷ͕ϑΝΠϧ໊ͳͷͰ
20. ͲͷΑ͏ʹಡΜ͔ͩ
21. ࣮ࡍʹಡΜͩίʔυΛ
    ަ͑ͯղઆ
22. 3BDL
23. 3BDL w8FCΞϓϦέʔγϣϯͱ8FCαʔόʔΛܨ͛ΔΠϯλʔϑΣΠε
    w3BDLΞϓϦέʔγϣϯͱͯ͠ͷϓϩτίϧΛຬͨ͢ΞϓϦΛαϙʔτ
    w.JEEMFXBSFߏ੒ΛऔΔ
    wconfig.ruΛ༻ҙ্ͨ͠ͰrackupίϚϯυͰىಈ
24. ΤϯτϦϙΠϯτ͔ΒಡΉ
25. SBDLVQ
26. SBDLVQ require "rack" Rack::Server.start bin/rackup wͨͬͨߦ
    wRack::Server.startΛ࣮ߦ͍ͯ͠Δ͚ͩ
27. 3VCZ
    044ʹ͋Γ͕ͪͳ͜ͱ ߦ
28. SBDLVQ def self.start(options = nil) new(options).start end lib/rack/server.rb wͨͬͨߦ
    w৽͍͠ServerΦϒδΣΫτΛੜ੒͠ɺServer#startΛ࣮ߦ
29. 3VCZ
    044ʹ͋Γ͕ͪͳ͜ͱ ߦ
30. SBDLVQ def start server.run wrapped_app, options, &blk end def server @_server ||= Rack::Handler.get(options[:server]) @_server end lib/rack/server.rb
31. 3BDL
    )BOEMFS
32. SBDLVQ # *Handlers* connect web servers with Rack. # # Rack includes Handlers for Thin, WEBrick, FastCGI, CGI, SCGI # and LiteSpeed. # # Handlers usually are activated by calling <tt>MyHandler.run(myapp)</tt>. # A second optional hash can be passed to include server-specific # configuration. module Handler def self.get(server) lib/rack/handler.rb
33. SBDLVQ # *Handlers* connect web servers with Rack. # # Rack includes Handlers for Thin, WEBrick, FastCGI, CGI, SCGI # and LiteSpeed. # # Handlers usually are activated by calling <tt>MyHandler.run(myapp)</tt>. # A second optional hash can be passed to include server-specific # configuration. module Handler def self.get(server) lib/rack/handler.rb
34. )BOEMFS
    ‑
    3BDLͱ8FCαʔόʔΛܨ͛Δ ίϝϯτʹΑΔͱ
35. 3VCZ
    044ʹ͋Γ͕ͪͳ͜ͱ ҙ֎ͱίϝϯτ͸໾ʹཱͭ
36. SBDLVQ def self.get(server) … if klass = @handlers[server] klass.split("::").inject(Object) { |o, x| o.const_get(x) } lib/rack/handler.rb: L21-22 wͲ͏΍ΒɺHandler.getͰ͸͜ͷߦͷ݁Ռ͕ฦ͍ͬͯΔΒ͍͠
37. @handlersʁ
38. inject(Object) { |o, x| o.const_get(x) }ʁ
40. ࠔͬͨΒbinding.irb
41. SBDLVQ if klass = @handlers[server] binding.irb klass.split("::").inject(Object) { |o, x| o.const_get(x) }
42. CJOEJOHJSC irb(Rack::Handler):001:0> server => "puma" irb(Rack::Handler):002:0> @handlers => {“cgi”=>”Rack::Handler::CGI”, ... , ”puma”=>"Rack::Handler::Puma"} irb(Rack::Handler):003:0> @handlers[server] => "Rack::Handler::Puma" irb(Rack::Handler):004:0> klass.split("::") => ["Rack", "Handler", "Puma"]
43. ࣮ࡍʹಈ͔ͯ͠ΈΔͱɺ
    Θ͔Γ΍͍͢
44. ͜͜Ͱ໰୊͕
45. inject(Object) { |o, x| o.const_get(x) }
46. CJOEJOHJSC irb(Rack::Handler):001:0> result = ["Rack", "Handler", “Puma"].inject(Object) { |o, x| o.const_get(x) } => Rack::Handler::Puma irb(Rack::Handler):002:0> result.class => Module
47. inject(Object)…ʁ
49. ࠔͬͨΒ
    EPDTSVCZMBOHPSH
50. ఆ਺ wఆ਺͸ͦͷఆ਺͕ఆٛ͞ΕͨΫϥεϞδϡʔϧఆٛͷத ϝιου
    ຊ ମ΍ωετͨ͠ΫϥεϞδϡʔϧఆٛதΛؚΈ·͢ ɺΫϥεΛܧঝ ͍ͯ͠ΔΫϥεɺϞδϡʔϧΛΠϯΫϧʔυ͍ͯ͠ΔΫϥε·ͨ͸Ϟ δϡʔϧ͔Βࢀর͢Δ͜ͱ͕Ͱ͖·͢ɻΫϥεఆٛͷ֎ τοϓϨϕ ϧ Ͱఆٛ͞Εͨఆ਺͸
    0CKFDU
    ʹॴଐ͢Δ͜ͱʹͳΓ·͢ɻ EPDTSVCZMBOHPSH
51. ఆ਺ wఆ਺͸ͦͷఆ਺͕ఆٛ͞ΕͨΫϥεϞδϡʔϧఆٛͷத ϝιου
    ຊ ମ΍ωετͨ͠ΫϥεϞδϡʔϧఆٛதΛؚΈ·͢ ɺΫϥεΛܧঝ ͍ͯ͠ΔΫϥεɺϞδϡʔϧΛΠϯΫϧʔυ͍ͯ͠ΔΫϥε·ͨ͸Ϟ δϡʔϧ͔Βࢀর͢Δ͜ͱ͕Ͱ͖·͢ɻΫϥεఆٛͷ֎ τοϓϨϕ ϧ Ͱఆٛ͞Εͨఆ਺͸
    0CKFDU
    ʹॴଐ͢Δ͜ͱʹͳΓ·͢ɻ EPDTSVCZMBOHPSH
52. ͳΔ΄Ͳʂ
53. SBDLVQ irb(main):001:0> require 'rack/handler/puma' => true irb(main):002:0> result = Object.const_get('Rack') => Rack irb(main):003:0> result.class => Module
54. if klass = @handlers[server] klass.split("::").inject(Object) { |o, x| o.const_get(x) } αʔό໊ʢserverʣΛจࣈྻͰड͚औΓɺ
    Ұக͢Δ3BDL
    )BOEMFSͷϞδϡʔϧΦϒδΣΫτΛฦ͢ lib/rack/handler.rb SBDLVQ
55. def start server.run wrapped_app, options, &blk end # server => Rack Handler lib/rack/server.rb SBDLVQ
56. SBDLVQ
    ‑
    )BOEMFSܦ༝Ͱ
    4FSWFSΛ্ཱͪ͛Δ
57. 3VCZͷ044ΛಡΉΑ͏ʹ
    ͳͬͯɺมΘͬͨ͜ͱ
58. ಡΉΑ͏ʹͳͬͯɺมΘͬͨ͜ͱ wίʔυΛಡΉ͕࣌ؒ૿͑ͨ
    w࣮ࡍʹಈ͔ͨ͠ΓυΩϡϝϯτΛಡΉश׳͕Ճ଎ͨ͠
    w3BJMTΞϓϦέʔγϣϯͷཪଆ͕ཧղͰ͖ͨ
    wʮͳͥʯΛҙ࣮ࣝͯ͠૷͕Ͱ͖ΔΑ͏ʹ
59. ·ͱΊ
60. ·ͱΊ w3VCZ
    044ΛಡΉ͜ͱͰɺ3VCZͷ༷ʑͳ͜ͱΛ஌Δ͖͔͚ͬʹͳΔ
    w8FCϒϥ΢β͚ͩͰ΋ίʔυϦʔσΟϯά͠΍͍͢؀ڥ͕͋Δ
    w࣮ࡍʹಈ͔ͨ͠Γɺίϝϯτ΍ϦϑΝϨϯεΛಡΜͰΈΔͱྑ͍
61. ͓ΘΓʹ
62. &OKPZ
    3VCZ
    044