[English ver]実録 Let's build a simple Rack compatible server

Transcript

1. .JTBLJ4IJPJ!DPF@
   'FC
   0FEP3VCZ,BJHJ
   ࣮࿥
   -FU`TCVJMEBTJNQMF
   3BDLDPNQBUJCMFTFSWFS⚡⚡⚡
   

   View Slide

2. "CPVUNF
   .JTBLJ4IJPJ ͓͍͠
   !DPF@
   
   ⚡8FCQSPHSBNNFS
   ⚡#FMPOHTUP"TBLVTBSC 5BNBSC 'VLVPLBSC
   ⚡*UTCFFOZFBSBOEBIBMG
   TJODF*KPJOFE"TBLVTBSCNFFUVQGPSUIFpSTUUJNF
   ⚡#VJMUBXFCTFSWFSSFDFOUMZ
   

   View Slide

3. .JTBLJ4IJPJ ͓͍͠
   !DPF@
   
   ⚡8FCQSPHSBNNFS
   ⚡#FMPOHTUP"TBLVTBSC 5BNBSC 'VLVPLBSC
   ⚡*UTCFFOZFBSBOEBIBMG
   TJODF*KPJOFE"TBLVTBSCNFFUVQGPSUIFpSTUUJNF
   ⚡#VJMUBXFCTFSWFSSFDFOUMZ
   "CPVUNF
   ‐5PEBZ`TUIFNF
   

   View Slide

4. BU
   3VCZ$POG/BTIWJMMF
   /PWFNCFS
   

   View Slide

5. l-FU`TCVJMEBTJNQMF)551TFSWFSz
   XIJDIJTBWFSZJOUFSFTUJOHUBML
   
   CZ&45)&30-"56/%&!FTUIFS
   ग़యɿIUUQTOPUJTUFTUIFSD(V(+MFUTCVJMEBTJNQMFIUUQTFSWFSXJUISVCZ
   

   View Slide

6. ʜJTJOUSPEVDFECZ!JHBJHB`TUXFFU
   ग़యɿIUUQTUXJUUFSDPNJHBJHBTUBUVT T
   

   View Slide

7. ʜJTJOUSPEVDFECZ!VE[VSB GSPN'VLVPLBSC
   CZUXFFU
   UPNF
   ग़యɿIUUQTUXJUUFSDPNVE[VSBTUBUVT T
   ˞NF
   

   View Slide

8. 4P
   XJUIUIFSFGFSFODFUPUIFTMJEF
   *CVJMUBTJNQMF)551TFSWFS
   

   View Slide

9. ʜBOEIFSFJUJT
   1 require ‘socket’
   
   2
   
   3 server = TCPServer.new(‘localhost’, 5000)
   
   4
   
   5 loop do
   
   6 client = server.accept
   
   7 request = client.readpartial(2048)
   
   8
   
   9 puts request
   
   10
   
   11 client.puts response <<~MESSAGE
   
   12 HTTP/1.1 200 OK\r\n
   
   13 Content-Type: text/plain\r\n
   
   14 \r\n
   
   15 Hello!\r\n
   
   16 MESSAGE
   
   17 end
   

   View Slide

10. 1 require ‘socket’
    
    2
    
    3 server = TCPServer.new(‘localhost’, 5000)
    
    4
    
    5 loop do
    
    6 client = server.accept
    
    7 request = client.readpartial(2048)
    
    8
    
    9 puts request
    
    10
    
    11 client.puts response <<~MESSAGE
    
    12 HTTP/1.1 200 OK\r\n
    
    13 Content-Type: text/plain\r\n
    
    14 \r\n
    
    15 Hello!\r\n
    
    16 MESSAGE
    
    17 end
    $SFBUFBOFXTFSWFSTPDLFU
    "DDFQUBOJODPNJOHDPOOFDUJPO
    (FUBSFRVFTUNFTTBHF
    %JTQMBZSFRVFTUNFTTBHFUPTFSWFSTJEF
    1SPWJTJPOBMSFTQPOTFNFTTBHF
    %JTQMBZSFTQPOTFNFTTBHFUPDMJFOUTJEF
    ʜBOEIFSFJUJT
    

    View Slide

11. DVSMMPDBMIPTU
    )PTU1PSUXIJDIBSFPQFOFE
    

    View Slide

12. *UXPSLT
    POTFSWFSTJEF
    PODMJFOUTJEF
    3FRVFTUNFTTBHF
    JTEJTQMBZFE
    3FTQPOTFCPEZ
    JTEJTQMBZFE
    

    View Slide

13. #VU
    

    View Slide

14. 5IJTTFSWFSDBO`USVOBQQMJDBUJPO⚠
    1 require ‘socket’
    
    2
    
    3 server = TCPServer.new(‘localhost’, 5000)
    
    4
    
    5 loop do
    
    6 client = server.accept
    
    7 request = client.readpartial(2048)
    
    8
    
    9 puts request
    
    10
    
    11 client.puts response <<~MESSAGE
    
    12 HTTP/1.1 200 OK\r\n
    
    13 Content-Type: text/plain\r\n
    
    14 \r\n
    
    15 Hello!\r\n
    
    16 MESSAGE
    
    17 end
    5IFSF`TOPBQQ
    4BNFNFTTBHFJTEJTQMBZFE
    FBDIUJNFZPVBDDFTTFE
    

    View Slide

15. *EMJLFUPNBLFUIJTTFSWFS
    3BDLDPNQBUJCMF
    

    View Slide

16. 4P *USJFEUPCVJME
    BTJNQMF3BDLDPNQBUJCMFTFSWFS
    XIJDIJTOBNFE
    4JNQMF3BDL$PNQBUJCMF4FSWFS
    

    View Slide

17. 1 require ‘rack’
    
    2 require_relative ‘../server/simple_rack_compatible_server’
    
    3
    
    4 class App
    
    5 def call(env)
    
    6 [
    
    7 200,
    
    8 { ‘Content-Type’ => ‘text/html’ },
    
    9 [“Hello.This app is running on .…”]
    
    10 ]
    
    11 end
    
    12 end
    
    13
    
    14 run App.new
    
    )FSFJTB3BDLBQQGPSWFSJpDBUJPO
    app/sample.ru
    

    View Slide

18. 1 require ‘rack’
    
    2 require_relative ‘../server/simple_rack_compatible_server’
    
    3
    
    4 class App
    
    5 def call(env)
    
    6 [
    
    7 200,
    
    8 { ‘Content-Type’ => ‘text/html’ },
    
    9 [“Hello.This app is running on .…”]
    
    10 ]
    
    11 end
    
    12 end
    
    13
    
    14 run App.new
    
    4UBUVT‎)5510,
    )FBEFS‎$POUFOU5ZQFUFYUIUNM
    #PEZ‎EJW
    I)FMMPI
    Q5IJTBQQJTʜQ
    EJW
    app/sample.ru
    )FSFJTB3BDLBQQGPSWFSJpDBUJPO
    8IFOZPVSVOʜ
    

    View Slide

19. )PX3BDLBQQMJDBUJPOTUBSUT
    6TFSFYFDVUFTSBDLVQ
    )BOEMFSJTDBMMFE
    4FSWFSJTSFHJTUFSFEUP)BOEMFS
    4FSWFSTUBSUTUPSVO
    )BOEMFSTUBSUT4FSWFS
    5IFTFSWFS
    DPOOFDUFEUP3BDL
    4FSWFSSVOT3BDLBQQ
    4UBSU
    4FSWFSDBMMT3BDLBQQ
    

    View Slide

20. JOUIFTFSWFS
    JO3BDL)BOEMFSNPEVMF
    
    JOUIFTFSWFS
    JO3BDL
    6TFSFYFDVUFTSBDLVQ
    )BOEMFSJTDBMMFE
    4FSWFSJTSFHJTUFSFEUP)BOEMFS
    4FSWFSTUBSUTUPSVO
    )BOEMFSTUBSUT4FSWFS
    4FSWFSDBMMT3BDLBQQ
    )PX3BDLBQQMJDBUJPOTUBSUT
    

    View Slide

21. 3FRVJSFNFOUPG3BDLDPNQBUJCMFTFSWFS
    *UIPVHIUBCPVUUIFSFRVJSFNFOUTGPSUIFTFSWFS
    CBTFEPOIPX3BDLBQQTUBSUT
    ᶃ)BOEMFS
    3BDL)BOEMFS4JNQMF3BDL$PNQBUJCMF4FSWFS
    
    ⚡5PSFHJTUFSUIFTFSWFSUP3BDL)BOEMFSNPEVMF
    ⚡5PTUBSUUIFTFSWFS
    ᶄ4FSWFS
    4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFS
    
    ⚡5PSFDFJWFBSFRVFTUNFTTBHF
    ⚡5PDBMM3BDLBQQMJDBUJPO
    ⚡5PSFUVSOBSFTQPOTFNFTTBHF
    

    View Slide

22. 1 require ‘rack/handler’
    
    2
    
    3 module Rack
    
    4 module Handler
    
    5 class SimpleRackCompatibleServer
    
    6 def self.run(app, options = {})
    
    7 environment = ENV[‘RACK_ENV’] || ‘development’
    
    8 default_host = environment == ‘development’ ? ‘localhost’ : ‘0.0.0.0’
    
    9
    
    10 host = options.delete(:Host) || default_host
    
    11 port = options.delete(:Port) || 9292
    
    12 args = [host, port, app]
    
    13 ::SimpleRackCompatibleServer::Server.new(*args).start
    
    14 end
    
    15 end
    
    16
    
    17 register :simple_rack_compatible_server, SimpleRackCompatibleServer
    
    18 end
    
    19 end
    ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO
    rack/handler/simple_rack_compatible_server.rb
    *NQMFNFOUBUJPOPG)BOEMFS SFGTUIJO
    
    SFRVJSF3BDL)BOEMFS
    

    View Slide

23. 1 require ‘rack/handler’
    
    2
    
    3 module Rack
    
    4 module Handler
    
    5 class SimpleRackCompatibleServer
    
    6 def self.run(app, options = {})
    
    7 environment = ENV[‘RACK_ENV’] || ‘development’
    
    8 default_host = environment == ‘development’ ? ‘localhost’ : ‘0.0.0.0’
    
    9
    
    10 host = options.delete(:Host) || default_host
    
    11 port = options.delete(:Port) || 9292
    
    12 args = [host, port, app]
    
    13 ::SimpleRackCompatibleServer::Server.new(*args).start
    
    14 end
    
    15 end
    
    16
    
    17 register :simple_rack_compatible_server, SimpleRackCompatibleServer
    
    18 end
    
    19 end
    rack/handler/simple_rack_compatible_server.rb
    5PSFHJTUFSUIFTFSWFSUP3BDL)BOEMFSNPEVMF
    ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO
    *NQMFNFOUBUJPOPG)BOEMFS SFGTUIJO
    
    

    View Slide

24. 1 require ‘rack/handler’
    
    2
    
    3 module Rack
    
    4 module Handler
    
    5 class SimpleRackCompatibleServer
    
    6 def self.run(app, options = {})
    
    7 environment = ENV[‘RACK_ENV’] || ‘development’
    
    8 default_host = environment == ‘development’ ? ‘localhost’ : ‘0.0.0.0’
    
    9
    
    10 host = options.delete(:Host) || default_host
    
    11 port = options.delete(:Port) || 9292
    
    12 args = [host, port, app]
    
    13 ::SimpleRackCompatibleServer::Server.new(*args).start
    
    14 end
    
    15 end
    
    16
    
    17 register :simple_rack_compatible_server, SimpleRackCompatibleServer
    
    18 end
    
    19 end
    rack/handler/simple_rack_compatible_server.rb
    ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO
    5IFNFUIPEUPTUBSUUIFTFSWFS
    *NQMFNFOUBUJPOPG)BOEMFS SFGTUIJO
    
    

    View Slide

25. 1 require ‘rack/handler’
    
    2
    
    3 module Rack
    
    4 module Handler
    
    5 class SimpleRackCompatibleServer
    
    6 def self.run(app, options = {})
    
    7 environment = ENV[‘RACK_ENV’] || ‘development’
    
    8 default_host = environment == ‘development’ ? ‘localhost’ : ‘0.0.0.0’
    
    9
    
    10 host = options.delete(:Host) || default_host
    
    11 port = options.delete(:Port) || 9292
    
    12
    
    13
    
    14 end
    
    15 end
    
    16
    
    17
    
    18 end
    
    19 end
    rack/handler/simple_rack_compatible_server.rb
    4FUUIFIPTUQPSUCZFOWJSPONFOU
    ˞DPOOFDUUPMPDBMIPTUCZEFGBVMU
    
    ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO
    *NQMFNFOUBUJPOPG)BOEMFS SFGTUIJO
    
    

    View Slide

26. 1 require ‘rack/handler’
    
    2
    
    3 module Rack
    
    4 module Handler
    
    5 class SimpleRackCompatibleServer
    
    6 def self.run(app, options = {})
    
    7 environment = ENV[‘RACK_ENV’] || ‘development’
    
    8 default_host = environment == ‘development’ ? ‘localhost’ : ‘0.0.0.0’
    
    9
    
    10 host = options.delete(:Host) || default_host
    
    11 port = options.delete(:Port) || 9292
    
    12 args = [host, port, app]
    
    13
    
    14 end
    
    15 end
    
    16
    
    17
    
    18 end
    
    19 end
    rack/handler/simple_rack_compatible_server.rb
    "SHTUPJOJUJBMJ[FUIFTFSWFS
    ⚡)PTU
    ⚡1PSU
    ⚡3BDLBQQMJDBUJPO
    ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO
    *NQMFNFOUBUJPOPG)BOEMFS SFGTUIJO
    
    

    View Slide

27. 1 require ‘rack/handler’
    
    2
    
    3 module Rack
    
    4 module Handler
    
    5 class SimpleRackCompatibleServer
    
    6 def self.run(app, options = {})
    
    7 environment = ENV[‘RACK_ENV’] || ‘development’
    
    8 default_host = environment == ‘development’ ? ‘localhost’ : ‘0.0.0.0’
    
    9
    
    10 host = options.delete(:Host) || default_host
    
    11 port = options.delete(:Port) || 9292
    
    12 args = [host, port, app]
    
    13 ::SimpleRackCompatibleServer::Server.new(*args).start
    
    14 end
    
    15 end
    
    16
    
    17
    
    18 end
    
    19 end
    rack/handler/simple_rack_compatible_server.rb
    *OTUBOUJBUF OFX
    TUBSU TUBSU
    
    UIFTFSWFS 4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFS
    
    ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO
    *NQMFNFOUBUJPOPG)BOEMFS SFGTUIJO
    
    

    View Slide

28. 1 require ‘socket’
    
    2
    
    3 module SimpleRackCompatibleServer
    
    4 class Server
    
    5 def initialize(*args)
    
    6 @host, @port, @app = args
    
    7 end
    
    8
    
    9 def start
    
    26 end
    
    27 end
    
    28 end
    simple_rack_compatible_server.rb
    *NQMFNFOUBUJPOPGUIFTFSWFS0WFSBMM
    ʜ
    .PWFPSJHJOBMJNQMFNFOUBUJPOPGUIFTFSWFS
    UP4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSDMBTT
    

    View Slide

29. 1 require ‘socket’
    
    2
    
    3 module SimpleRackCompatibleServer
    
    4 class Server
    
    5 def initialize(*args)
    
    6 @host, @port, @app = args
    
    7 end
    
    8
    
    9 def start
    
    27 end
    
    28 end
    
    29 end
    simple_rack_compatible_server.rb
    ʜ
    *OTUBOUJBUFXJUIBSHTGSPN)BOEMFS
    ⚡IPTU
    ⚡QPSU
    ⚡3BDLBQQMJDBUJPO
    "EEUIFGPMMPXJOHDIBOHFT
    UPUIFPSJHJOBM)551TFSWFS
    4FFUIFOFYUTMJEFGPSNPSFEFUBJMTʜ
    
    *NQMFNFOUBUJPOPGUIFTFSWFS0WFSBMM
    

    View Slide

30. 9 def start
    
    10 server = TCPServer.new(@host, @port)
    
    11
    
    12 loop do
    
    13 client = server.accept
    
    14 request = client.readpartial(2048)
    
    15
    
    16 @status, @header, @body = @app.call
    
    17
    
    18 puts request
    
    19
    
    20 client.puts <<~MESSAGE
    
    21 #{‘HTTP/1.1 200 OK’ if @status.eql? 200}\r\n
    
    22 #{@header.map { |k, v| [k, v].join(’: ’) }.join(“\r\n”)}\r\n
    
    23 \r\n
    
    24 #{@body}
    
    25 MESSAGE
    
    26 end
    simple_rack_compatible_server.rb
    DIBOHFTᶄ
    $BMMUIF3BDLBQQMJDBUJPO
    BOEHFUUIFSFUVSOWBMVFT
    DIBOHFTᶅ
    (FOFSBUFBSFTQPOTFNFTTBHF
    GSPNUIFSFUVSOWBMVFT
    *NQMFNFOUBUJPOPGUIFTFSWFSTUBSU
    DIBOHFTᶃ
    4FUUIFIPTUQPSU
    GSPN)BOEMFS
    

    View Slide

31. #VU
    

    View Slide

32. 9 def start
    
    10 server = TCPServer.new(@host, @port)
    
    11
    
    12 loop do
    
    13 client = server.accept
    
    14 request = client.readpartial(2048)
    
    15
    
    16 @status, @header, @body = @app.call(???)
    
    17
    
    18 puts request
    
    19
    
    20 client.puts <<~MESSAGE
    
    21 #{‘HTTP/1.1 200 OK’ if @status.eql? 200}\r\n
    
    22 #{@header.map { |k, v| [k, v].join(’: ’) }.join(“\r\n”)}\r\n
    
    23 \r\n
    
    24 #{@body}
    
    25 MESSAGE
    
    26 end
    simple_rack_compatible_server.rb
    8IBUTIPVME*EPʜ
    8IBUBSHTEPFTUIFDBMMNFUIPEOFFE ⚠
    4PNFFOWJSPONFOUWBSJBCMFT
    IBWFUPCFIFSF
    

    View Slide

33. 9 def start
    
    10 server = TCPServer.new(@host, @port)
    
    11
    
    12 loop do
    
    13 client = server.accept
    
    14 request = client.readpartial(2048)
    
    15
    
    16 @status, @header, @body = @app.call({ })
    
    17
    
    18 puts request
    
    19
    
    20 client.puts <<~MESSAGE
    
    21 #{‘HTTP/1.1 200 OK’ if @status.eql? 200}\r\n
    
    22 #{@header.map { |k, v| [k, v].join(’: ’) }.join(“\r\n”)}\r\n
    
    23 \r\n
    
    24 #{@body}
    
    25 MESSAGE
    
    26 end
    simple_rack_compatible_server.rb
    1SPWJTJPOBMMZ
    "OFNQUZ)BTIPCKFDU
    

    View Slide

34. SBDLVQTTJNQMF@SBDL@DPNQBUJCMF@TFSWFS
    "OZXBZʜ
    

    View Slide

35. ‎(PUMPUTPGFSSPST
    ☠☠☠
    

    View Slide

36. *UTFFNTUIFSF`SFSFRVJSFEWBSJBCMFT
    FOWNJTTJOHSFRVJSFELFZ3&26&45@.&5)0%
    3BDL-JOU-JOU&SSPS
    
    

    View Slide

37. rack/lib/rack/lint.rb
    4FF3BDL-JOUDMBTT
    

    View Slide

38. rack/lib/rack/lint.rb
    &YQMBOBUJPOTBCPVUSFRVJSFEWBSJBCMFT
    ʜ
    4FF3BDL-JOUDMBTT
    

    View Slide

39. ⚡1"5)@*/'0‎1BUIPGSFRVFTUFE63-
    ⚡26&3:@453*/(‎2VFSZTUSJOH
    ⚡.&5)0%‎)551NFUIPE
    ⚡4&37&3@/".&‎5PCVJMEB63-XJUI
    4$3*15@/".&1"5)@*/'0
    ⚡4&37&3@1035‎5PCVJMEB63-XJUI
    4$3*15@/".&1"5)@*/'0
    7BSJBCMFTEFpOFEJO1&1
    1&1‎1ZUIPO8FC4FSWFS(BUFXBZ*OUFSGBDFW
    IUUQTXXXQZUIPOPSHEFWQFQTQFQ
    

    View Slide

40. ⚡SBDLWFSTJPO‎3BDLWFSTJPO BO"SSBZPCKFDU
    
    ⚡SBDLJOQVU‎*OQVUTUSFBN
    BO*0MJLFPCKFDU
    
    ⚡SBDLFSSPST‎&SSPSTUSFBN
    BOPCKFDUSFTQPOTFUPQVUTXSJUFqVTI
    
    ⚡SBDLNVMUJQSPDFTT‎8IFUIFSUIFBQQMJDBUJPOJTJOWPLFE
    CZNVMUJQMFQSPDFTTFTTJNVMUBOFPVTMZ
    ⚡SBDLNVMUJUISFBE‎8IFUIFSUIFBQQMJDBUJPOJTJOWPLFE
    CZNVMUJQMFUISFBETJOUIFTBNFQSPDFTT
    BUUIFTBNFUJNF
    ⚡SBDLSVO@PODF‎'PSBTFSWFSCBTFEPO$(*
    ⚡SBDLVSM@TDIFNF‎63*TDIFNF IUUQPSIUUQT
    
    3BDLTQFDJpDWBSJBCMFT
    

    View Slide

41. 18 def env
    
    19 {
    
    20 ‘PATH_INFO’ => @path || ‘/’,
    
    21 ‘QUERY_STRING’ => @query || ‘’,
    
    22 ‘METHOD’ => @method || ‘GET’,
    
    23 ‘SERVER_NAME’ => ‘simple_rack_compatible_server’,
    
    24 ‘SERVER_PORT’ => @port.to_s,
    
    25 ‘rack.version’ => Rack::VERSION,
    
    26 ‘rack.input’ => StringIO.new(@input || ‘’).set_encoding(‘ASCII_8BIT’),
    
    27 ‘rack.errors’ => $stderr,
    
    28 ‘rack.multiprocess’ => false,
    
    29 ‘rack.multithread’ => false,
    
    30 ‘rack.run_once’ => false,
    
    31 ‘rack.url_scheme’ => @scheme&.downcase&.slice(/http[a-z]*/) || ‘http’
    
    32 }
    
    33 end
    simple_rack_compatible_server.rb
    %FpOFFOWNFUIPESFGTUP3BDL-JOU
    %ZOBNJDBMMZHFOFSBUFEWBSJBCMFTGSPNUIFSFRVFTU
    PSEFGBVMUWBMVF
    

    View Slide

42. 35 def start
    
    36 server = TCPServer.new(@host, @port)
    
    37
    
    38 loop do
    
    39 client = server.accept
    
    40
    
    41 request = client.readpartial(2048).split(“\r\n”)
    
    42 @method, path, @scheme = request.first.split
    
    43 @path, @query = path.split(‘?’)
    
    44 @input = request.index(‘’) ? request[request.index(‘’) + 1] : ‘’
    
    45
    
    46 puts “Received request message: #{@method} #{@path} #{@scheme}”
    
    47
    
    48 @status, @header, @body = @app.call(env)
    
    49
    
    50 client.puts <<~MESSAGE
    
    51 # …
    simple_rack_compatible_server.rb
    (FOFSBUFWBSJBCMFTGSPNUIFSFRVFTUNFTTBHF
    "EEDPEFTUPHFOFSBUFWBSJBCMFT
    

    View Slide

43. 35 def start
    
    36 server = TCPServer.new(@host, @port)
    
    37
    
    38 loop do
    
    39 client = server.accept
    
    40
    
    41 request = client.readpartial(2048).split(“\r\n”)
    
    42 @method, path, @scheme = request.first.split
    
    43
    
    44
    
    45
    
    46
    
    47
    
    48
    
    49
    
    50
    
    51
    simple_rack_compatible_server.rb
    !NFUIPE‎)551NFUIPE
    ˏTDIFNF‎63*TDIFNF
    (FOFSBUFWBSJBCMFTGSPNUIFSFRVFTUNFTTBHF
    

    View Slide

44. 35 def start
    
    36 server = TCPServer.new(@host, @port)
    
    37
    
    38 loop do
    
    39 client = server.accept
    
    40
    
    41 request = client.readpartial(2048).split(“\r\n”)
    
    42 @method, path, @scheme = request.first.split
    
    43 @path, @query = path.split(‘?’)
    
    44
    
    45
    
    46
    
    47
    
    48
    
    49
    
    50
    
    51
    simple_rack_compatible_server.rb
    !QBUI‎1BUIPGSFRVFTUFE63-
    !RVFSZ‎2VFSZTUSJOH
    (FOFSBUFWBSJBCMFTGSPNUIFSFRVFTUNFTTBHF
    

    View Slide

45. 35 def start
    
    36 server = TCPServer.new(@host, @port)
    
    37
    
    38 loop do
    
    39 client = server.accept
    
    40
    
    41 request = client.readpartial(2048).split(“\r\n”)
    
    42 @method, path, @scheme = request.first.split
    
    43 @path, @query = path.split(‘?’)
    
    44 @input = request.index(‘’) ? request[request.index(‘’) + 1] : ‘’
    
    45
    
    46
    
    47
    
    48
    
    49
    
    50
    
    51
    simple_rack_compatible_server.rb
    !JOQVU‎*OQVUTUSFBN 3FRVFTUCPEZ
    
    (FOFSBUFWBSJBCMFTGSPNUIFSFRVFTUNFTTBHF
    

    View Slide

46. 35 def start
    
    36 server = TCPServer.new(@host, @port)
    
    37
    
    38 loop do
    
    39 client = server.accept
    
    40
    
    41 request = client.readpartial(2048).split(“\r\n”)
    
    42 @method, path, @scheme = request.first.split
    
    43 @path, @query = path.split(‘?’)
    
    44 @input = request.index(‘’) ? request[request.index(‘’) + 1] : ‘’
    
    45
    
    46 puts “Received request message: #{@method} #{@path} #{@scheme}”
    
    47
    
    48
    
    49
    
    50
    
    51
    simple_rack_compatible_server.rb
    *BMTPBEEFEMPHTUPEJTQMBZ
    (FOFSBUFWBSJBCMFTGSPNUIFSFRVFTUNFTTBHF
    

    View Slide

47. SBDLVQTTJNQMF@SBDL@DPNQBUJCMF@TFSWFS
    "HBJOʜ
    

    View Slide

48. ‎*UXPSLT
    3FDFJWFESFRVFTUNFTTBHF(&5)551
    3BDL-JOU-JOU&SSPSFSSPSDMFBSFE
    BOEMPHTBSFEJTQMBZFE
    BUNZUFSNJOBM
    

    View Slide

49. BU%FW5PPMTPGNZCSPXTFS
    4UBUVTDPEFBOE)FBEFSSFUVSOFEGSPN3BDLBQQ
    BSFTVDDFTTGVMMZPVUQVUUPUIFDMJFOUTJEF
    )FBEFS
    $POUFOU5ZQFUFYUIUNM
    
    4UBUVTDPEF
    
    
    

    View Slide

50. "OEUIFSFTQPOTFCPEZJTʜ
    

    View Slide

51. 
    "OEUIFSFTQPOTFCPEZJTʜ
    

    View Slide

52. 4PNFUIJOH`TXSPOH
    0,
    /(
    SBDLCPEZQSPYZ
    %0.TIPVMECFHFOFSBUFE
    GSPNSFTQPOTFCPEZ
    

    View Slide

53. 35 def start
    
    36 server = TCPServer.new(@host, @port)
    
    37
    
    38 loop do
    
    …
    
    47
    
    48 @status, @header, @body = @app.call(env)
    
    49
    
    50 client.puts <<~MESSAGE
    
    51 #{‘HTTP/1.1 200 OK’ if @status.eql? 200}\r\n
    
    52 #{@header.map { |k, v| [k, v].join(’: ’) }.join(“\r\n”)}\r\n
    
    53 \r\n
    
    54 #{@body}
    
    55 MESSAGE
    
    56 end
    
    57 end
    simple_rack_compatible_server.rb
    )FSFUIFSFTQPOTFNFTTBHFJT
    8IBU*XBTFYQFDUJOHJT
    [“Hello.This app is …”]
    $BMMUIF3BDLBQQHFUUIFSFUVSOWBMVFT
    <4UBUVT \)FBEFS^ <#PEZ>>
    

    View Slide

54. 8IBUJTJOTJEF!CPEZ
    JSC 4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSYʜ
    QQ!CPEZ
    3BDL#PEZ1SPYZYʜ
    !CMPDL
    1SPDYʜ!ʜSBDLMJCSBDLDPNNPO@MPHHFSSC
    !CPEZ
    3BDL-JOUYʜ
    !BQQ
    3BDL5FNQpMF3FBQFSYʜ!BQQ"QQYʜ
    !CPEZ
    3BDL#PEZ1SPYZYʜ
    !CMPDL
    1SPDYʜ!ʜSBDLMJCSBDLUFNQpMF@SFBQFSSC
    !CPEZ
    
    !DMPTFEGBMTF
    

    View Slide

55. JSC 4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSYʜ
    QQ!CPEZ
    3BDL#PEZ1SPYZYʜ
    !CMPDL
    1SPDYʜ!ʜSBDLMJCSBDLDPNNPO@MPHHFSSC
    !CPEZ
    3BDL-JOUYʜ
    !BQQ
    3BDL5FNQpMF3FBQFSYʜ!BQQ"QQYʜ
    !CPEZ
    3BDL#PEZ1SPYZYʜ
    !CMPDL
    1SPDYʜ!ʜSBDLMJCSBDLUFNQpMF@SFBQFSSC
    !CPEZ
    
    !DMPTFEGBMTF
    *U`TBOJOTUBODFPG3BDL#PEZ1SPYZ
    8IBUJTJOTJEF!CPEZ
    

    View Slide

56. JSC 4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSYʜ
    QQ!CPEZ
    3BDL#PEZ1SPYZYʜ
    !CMPDL
    1SPDYʜ!ʜSBDLMJCSBDLDPNNPO@MPHHFSSC
    !CPEZ
    3BDL-JOUYʜ
    !BQQ
    3BDL5FNQpMF3FBQFSYʜ!BQQ"QQYʜ
    !CPEZ
    3BDL#PEZ1SPYZYʜ
    !CMPDL
    1SPDYʜ!ʜSBDLMJCSBDLUFNQpMF@SFBQFSSC
    !CPEZ
    
    !DMPTFEGBMTF
    "OEUIJTJTXIBU*XBOU
    )PXDBO*HFUUIJTʜ
    
    8IBUJTJOTJEF!CPEZ
    

    View Slide

57. JSC 4JNQMF3BDL$PNQBUJCMF4FSWFSTFSWʜ
    QQ!CPEZDBMM FOW
    
    <
    \$POUFOU5ZQFUFYUIUNM^
    3BDL-JOUYʜ
    !BQQ
    3BDL5FNQpMF3FBQFSYʜ!BQQ"QQYʜ
    !CPEZ
    3BDL#PEZ1SPYZYʜ
    !CMPDL
    1SPDYʜ!ʜSBDLMJCSBDLUFNQpMF@SFBQFSSC
    !CPEZ
    <EJWI)FMMPIQ5IJTBQQJTʜQEJW>
    !DMPTFEGBMTF
    !DPOUFOU@MFOHUIOJM
    !IFBE@SFRVFTUGBMTF>
    5SJFEUPDBMM!CPEZ
    

    View Slide

58. JSC 4JNQMF3BDL$PNQBUJCMF4FSWFSTFSWFʜ
    QQ!CPEZDBMM FOW
    
    <
    \$POUFOU5ZQFUFYUIUNM^
    3BDL-JOUYʜ
    !BQQ
    3BDL5FNQpMF3FBQFSYʜ!BQQ"QQYʜ
    !CPEZ
    3BDL#PEZ1SPYZYʜ
    !CMPDL
    1SPDYʜ!ʜSBDLMJCSBDLUFNQpMF@SFBQFSSC
    !CPEZ
    
    !DMPTFEGBMTF
    !DPOUFOU@MFOHUIOJM
    !IFBE@SFRVFTUGBMTF>
    4PGBSʜ
    4IPVME*LFFQDBMMJOHVOUJM
    UIFSFTQPOTFCPEZJUTFMG
    JTSFUVSOFE
    CPEZ BOJOTUBODFPG3BDL-JOU
    
    5SJFEUPDBMM!CPEZ
    

    View Slide

59. *HPUBIJOUGSPN5BLBIBTIJTBO
    5IFDBMMNFUIPESFUVSOTBO"SSBZPCKFDU
    XJUIFMFNFOUTBOEUIFUIJSEJTCPEZ
    "OECPEZJTBOPCKFDUSFTQPOEUP
    FBDINFUIPE UP@QBUINFUIPEBOETPPOʜ
    

    View Slide

60. *HPUBIJOUGSPN5BLBIBTIJTBO
    5IFDBMMNFUIPESFUVSOTBO"SSBZPCKFDU
    XJUIFMFNFOUTBOEUIFUIJSEJTCPEZ
    "OECPEZJTBOPCKFDUSFTQPOEUP
    FBDINFUIPE UP@QBUINFUIPEBOETPPOʜ
    ʜFBDINFUIPE
    

    View Slide

61. 3BDL#PCZ1SPYZFBDI
    3BDL#PCZ1SPYZIBTFBDINFUIPE
    5IJTNJHIUCFVTFGVM
    

    View Slide

62. 1 require ‘socket’
    
    2
    
    3 module SimpleRackCompatibleServer
    
    4 class Server
    
    69 def body
    
    70 res_body = []
    
    71 @body.each { |body| res_body << body }
    
    72 res_body.join(“\n”)
    
    73 end
    
    74 end
    
    75 end
    simple_rack_compatible_server.rb
    (FUSFTQPOTFCPEZVTJOHFBDINFUIPE
    … $BMMFBDINFUIPEUP!CPEZ
    BOEHFOFSBUFBO"SSBZPCKFDU
    $POWFSUUPBTUSJOHBUUIFFOE
    

    View Slide

63. 35 def start
    
    
    
    48 @status, @header, @body = @app.call(env)
    
    49
    
    50 client.puts <<~MESSAGE
    
    51 #{‘HTTP/1.1 200 OK’ if @status.eql? 200}\r\n
    
    52 #{@header.map { |k, v| [k, v].join(’: ’) }.join(“\r\n”)}\r\n
    
    53 \r\n
    
    54 #{body}
    
    55 MESSAGE
    
    56 end
    
    57 end
    simple_rack_compatible_server.rb
    $BMMCPEZNFUIPE
    …
    $BMMUIFCPEZNFUIPE
    

    View Slide

64. SBDLVQTTJNQMF@SBDL@DPNQBUJCMF@TFSWFS
    "HBJOBOEBHBJO
    

    View Slide

65. BOEʜ
    

    View Slide

66. *UXPSLT
    3FTQPOTFCPEZJTBMTPEJTQMBZFE
    

    View Slide

67. 5IFTUBUVTDPEF IFBEFS BOECPEZBSF
    BMMPVUQVUUPUIFDMJFOUTJEF
    *UXPSLT
    4UBUVT‎)5510,
    )FBEFS‎$POUFOU5ZQFUFYUIUNM
    #PEZ‎EJW
    I)FMMPI
    Q5IJTBQQJTʜQ
    EJW
    

    View Slide

68. 5IJTJTUIFpYFEWFSTJPO⚡
    

    View Slide

69. 1 require ‘socket’
    
    2
    
    3 module SimpleRackCompatibleServer
    
    4 class Server
    
    5 def initialize(*args)
    
    6 @host, @port, @app = args
    
    7 @method = nil
    
    8 @path = nil
    
    9 @scheme = nil
    
    10 @query = nil
    
    11 @input = nil
    
    12 @status = nil
    
    13 @header = nil
    
    14 @body = nil
    
    15 end
    simple_rack_compatible_server.rb
    4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSJOJUJBMJ[F
    ⚡SFRVJSFTPDLFUMJCSBSZ
    ⚡*OJUJBMJ[FSFRVJSFEJOTUBODFWBSJBCMFT
    

    View Slide

70. 18 def env
    
    19 {
    
    20 ‘PATH_INFO’ => @path || ‘/’,
    
    21 ‘QUERY_STRING’ => @query || ‘’,
    
    22 ‘METHOD’ => @method || ‘GET’,
    
    23 ‘SERVER_NAME’ => ‘simple_rack_campatible_server’,
    
    24 ‘SERVER_PORT’ => @port.to_s,
    
    25 ‘rack.version’ => Rack::VERSION,
    
    26 ‘rack.input’ => StringIO.new(@input || ‘’).set_encoding(‘ASCII_8BIT’),
    
    27 ‘rack.errors’ => $stderr,
    
    28 ‘rack.multiprocess’ => false,
    
    29 ‘rack.multithread’ => false,
    
    30 ‘rack.run_once’ => false,
    
    31 ‘rack.url_scheme’ => @scheme&.downcase&.slice(/http[a-z]*/) || ‘http’
    
    32 }
    
    33 end
    simple_rack_compatible_server.rb
    4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSFOW
    ⚡1SPWJEFUIFWBSJBCMFTSFRVJSFEUPDBMMUIF3BDLBQQ
    

    View Slide

71. 35 def start
    
    36 server = TCPServer.new(@host, @port)
    
    37
    
    38 puts <<~MESSAGE
    
    39 #{@app} is running on #{@host}: #{@port}
    
    40 => Use Ctrl-C to stop
    
    41 MESSAGE
    
    42
    
    43 loop do
    
    44 client = server.accept
    
    
    
    
    
    
    
    
    
    60 end
    
    61 end
    simple_rack_compatible_server.rb
    …
    4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSTUBSU
    ⚡4UBSUMPPQJOH
    ⚡"DDFQUBOJODPNJOHDPOOFDUJPO
    ⚡$SFBUFBOFXTFSWFSTPDLFU
    ⚡%JTQMBZBTUBSUJOHNFTTBHF
    

    View Slide

72. 46 begin
    
    47 request = client.readpartial(2048).split(“\r\n”)
    
    48 @method, path, @scheme = request.first.split
    
    49 @path, @query = path.split(‘?’)
    
    50 @input = request.index(‘’) ? request[request.index(‘’) + 1] : ‘’
    
    51
    
    52 puts “Received request message: #{@method} #{@path} #{@schema}”
    
    53
    
    54
    
    55
    
    56
    
    57
    
    58
    
    59 end
    simple_rack_compatible_server.rb
    4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSTUBSU
    ⚡(FUUIFSFRVFTUNFTTBHF
    ⚡(FOFSBUFWBSJBCMFTGPSDBMMJOH3BDLBQQ
    ⚡%JTQMBZMPHUPUIFTFSWFSTJEF
    

    View Slide

73. 46 begin
    
    47
    
    48
    
    49
    
    50
    
    51
    
    52
    
    53
    
    54 @status, @header, @body = @app.call(env)
    
    55
    
    56 client.puts [status, header, ‘’, body].join(“\r\n”)
    
    57 ensure
    
    58 client.close
    
    59 end
    simple_rack_compatible_server.rb
    4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSTUBSU
    ⚡$BMMUIF3BDLBQQ(FUUIFSFUVSOFEWBMVFT
    ⚡(FOFSBUFUIFSFTQPOTFNFTTBHF
    GSPNUIFSFUVSOFEWBMVF0VUQVUJU
    ⚡$MPTFUIFTPDLFU
    

    View Slide

74. 46 begin
    
    47
    
    48
    
    49
    
    50
    
    51
    
    52
    
    53
    
    54
    
    55
    
    56 client.puts [status, header, ‘’, body].join(“\r\n”)
    
    57 ensure
    
    58 client.close
    
    59 end
    simple_rack_compatible_server.rb
    4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSTUBSU
    67 def status
    
    68 case @status
    
    69 when 200
    
    70 “#{@schema} 200 OK”
    
    82 def header
    
    83 @header.map { |k, v| [k, v].join(’: ’) }.join(“\r\n”)
    
    84 end
    
    86 def body
    
    87 res_body = []
    
    88 @body.each { |body| res_body << body }
    
    89 res_body.join(“\n”)
    
    90 end
    

    View Slide

75. ͓ർΕ༷Ͱͨ͠✨
    

    View Slide

76. ը૾ɿIUUQTUXJUUFSDPNUFOEFSMPWF
    ग़యɿIUUQTTQFBLFSEFDLDPNUFOEFSMPWFHBPEVOBLPEP
    "BSPOTBOɹɹɹɹ
    

    View Slide

77. .ZJNQSFTTJPOBGUFSJNQMFNFOUBUJPO
    3BDLΛ࢖ͬͯ
    3BDLDPNQBUJCMFͳ
    8FCαʔόʔΛ࡞Δͷ͸
    ָ
    

    View Slide

78. "OEBMTPʜ
    ⚡5IFSFBSFTUJMMBMPUPGUIJOHTUPUIJOLBCPVU
    BTJUJTTUJMMQSPWJTJPOBMMZJNQMFNFOUFE
    *OQVU 1BSBMMFMJ[BUJPO 1FSGPSNBODFʜ
    
    ⚡*`EMPWFUPLOPXNPSFBOENPSFBCPVU3BDL
    ⚡*`NXBJUJOHGPSZPVSSFWJFX
    IUUQTHJUIVCDPNTIJPJNNTJNQMF@SBDL@DPNQBUJCMF@TFSWFS
    

    View Slide

79. 3BDL͸ָɹ
    

    View Slide

80. 3BDL͸ָ͍͠ʂ
    

    View Slide

81. ͓ΘΓʹ⚡⚡⚡
    

    View Slide

82. "CPVUNF BHBJO
    
    

    View Slide

83. %PZPVSFNFNCFSXIBUIBQQFOFE
    ZFBSBOEBIBMGBHP
    

    View Slide

84. 4FQ
    0FEP3VCZ,BJHJ
    ը૾ɿIUUQTSFHJPOBMSVCZLBJHJPSHPFEP
    

    View Slide

85. .ZpSTUUJNFGPS"TBLVTBSC
    ʜJTEBZTCFGPSF
    UIFQSFWJPVT0FEP3VCZ,BJHJ
    
    GSPNUIFFTBPG"TBLVTBSC
    
    "OE*BQQMJFEGPSJUBUUIBUUJNFSJHIUBXBZ
    
    ୈճ
    ը૾ɿIUUQTBTBLVTBSCFTBJPQPTUT
    

    View Slide

86. ը૾ɿIUUQTSFHJPOBMSVCZLBJHJPSHPFEP
    5IFQSFWJPVT0FEP3VCZLBJHJ
    

    View Slide

87. XBTBHSFBUUJNF
    ը૾ɿIUUQTSFHJPOBMSVCZLBJHJPSHPFEP
    5IFQSFWJPVT0FEP3VCZLBJHJ
    

    View Slide

88. ,FZOPUF
    +POBOTBOʮ)PXUPCFσΧʯ
    ը૾ɿIUUQTSFHJPOBMSVCZLBJHJPSHPFEP
    5IFQSFWJPVT0FEP3VCZLBJHJ
    

    View Slide

89. ,FZOPUF
    +POBOTBOʮ)PXUPCFσΧʯ
    Have your heroes
    ը૾ɿIUUQTSFHJPOBMSVCZLBJHJPSHPFEP
    5IFQSFWJPVT0FEP3VCZLBJHJ
    

    View Slide

90. 'PSNF
    ZFBSBOEBIBMGBHP
    5IFQFPQMFJO"TBLVTBSC
    XFSFSFBMlIFSPFTz
    

    View Slide

91. /PX
    BOEBIBMGZFBSTMBUFS
    5IFZBSFBMTP
    QFFSTJOUIFTBNFDPNNVOJUZ
    

    View Slide

92. 5BMLBCPVU3VCZ FUD
    
    ✨
    8SJUFDPEFT+
    )BWFBEFMJDJPVTEJTIFTFUD
    'PSNF "TBLVTBSCJTXIFSF
    3VCZJTUTHBUIFS
    UPNBLFΘ͍Θ͍BOEFOKPZ
    

    View Slide

93. "TBLVTBSC͸ָ͍͠ʂ
    

    View Slide

94. 4QFDJBM5IBOLT✨
    JOTQJSFEGSPN
    !FTUIFS
    !UFOEFSMPWFUIF3BDLUFBN
    ŠŠ
    !JHBJHB!VE[VSB
    !UBLBIBTIJN!PLVSBNBTBGVNJ
    !UIFKPOBOTIPX"TBLVTBSC'VLVPLBSC
    "OEUIBOLZPVGPSMJTUFOJOH⚡⚡⚡
    

    View Slide