実録 Let's build a simple Rack compatible server

Transcript

1. ࣮࿥
   -FU`T
   CVJME
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   TFSWFS⚡⚡⚡ ԘҪ
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8. ͱ͍͏͜ͱͰɺ
   ൃදࢿྉΛࢀߟʹ
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   ࡞ͬͯΈ·ͨ͠
9. ग़དྷ্͕ͬͨͷ͕ͪ͜Β 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 TPDLFUϥΠϒϥϦΛSFRVJSF
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
    αʔόʔ઀ଓΛPQFO
    ΫϥΠΞϯτ͔Βͷ઀ଓཁٻΛड͚෇͚Δ
    
    ϦΫΤετϝοηʔδΛಡΈࠐΉ
    ϦΫΤετϝοηʔδΛαʔόʔଆʹग़ྗ ద౰ͳϨεϙϯεϝοηʔδ
    ϨεϙϯεϝοηʔδΛΫϥΠΞϯτଆʹग़ྗ ग़དྷ্͕ͬͨͷ͕ͪ͜Β
11. 
    DVSM
    MPDBMIPTU ࡞ͬͨαʔόʔͷϗετͱϙʔτ൪߸
12. ಈ͖·ͨ͠ αʔόʔଆ ΫϥΠΞϯτଆ
    ϦΫΤετϝοηʔδ͕
    
    ग़ྗ͞Ε͍ͯΔ
    ϨεϙϯεϘσΟ͕
    
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13. ͔͠͠
14. ಈతͳΞϓϦέʔγϣϯʹ͸ରԠ͍ͯ͠ͳ͍⚠ 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
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15. ͔ͤͬ͘ͳͷͰ
    3BDL
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16. γϯϓϧͰ3BDL
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    ͱ͍͏໊લͷαʔόʔΛ
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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 [“<div><h1>Hello.</h1><p>This app is running on .…</p></div>”] 10 ] 11 end 12 end 13 14 run App.new ݕূ༻ͷ3BDLΞϓϦέʔγϣϯ͕ͪ͜Β app/sample.ru
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 [“<div><h1>Hello.</h1><p>This app is running on .…</p></div>”] 10 ] 11 end 12 end 13 14 run App.new
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19. 3BDLΞϓϦέʔγϣϯ͕ىಈ͢ΔྲྀΕ
    SBDLVQίϚϯυΛ࣮ߦ ϋϯυϥʔΛىಈ ϋϯυϥʔʹαʔόʔΛొ࿥ αʔόʔຊମ͕ॲཧΛ։࢝ αʔόʔΛىಈ 3BDLຊମͱ
    αʔόʔຊମΛ઀ଓ αʔόʔ͕
    ΞϓϦέʔγϣϯΛ࣮ߦ ىಈ։࢝ 3BDLΞϓϦέʔγϣϯΛ࣮ߦ
20. 3BDLΞϓϦέʔγϣϯ͕ىಈ͢ΔྲྀΕ
    SBDLVQίϚϯυΛ࣮ߦ ϋϯυϥʔΛىಈ ϋϯυϥʔʹαʔόʔΛొ࿥ αʔόʔຊମ͕ॲཧΛ։࢝ αʔόʔΛىಈ 3BDLΞϓϦέʔγϣϯΛ࣮ߦ 3BDLຊମͷ
    )BOEMFSϞδϡʔϧΛ࢖ͬͨ
    αʔόʔຊମͷॲཧ αʔόʔຊମͷॲཧ 3BDLຊମͷॲཧ
21. 3BDL
    DPNQBUJCMFͳαʔόʔͷػೳཁ݅ 3BDLΞϓϦέʔγϣϯ͕ىಈ͢ΔྲྀΕΛ౿·͑ͯɺ
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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 ϋϯυϥʔΛ࣮૷ ࢀߟ
    5IJO
    3BDL)BOEMFSϞδϡʔϧΛSFRVJSF
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
    3BDL)BOEMFSϞδϡʔϧʹαʔόʔΛొ࿥͢Δ ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO ϋϯυϥʔΛ࣮૷ ࢀߟ
    5IJO
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
    αʔόʔΛىಈ͢Δϝιου
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    5IJO
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
    ࣮ߦ؀ڥ͔Βϗετͱϙʔτ൪߸Λઃఆ͢Δ
    
    ˞σϑΥϧτͰ
    MPDBMIPTU
    ʹ઀ଓ ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO ϋϯυϥʔΛ࣮૷ ࢀߟ
    5IJO
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
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    5IJO
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
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    ࢀߟɿIUUQTHJUIVCDPNNBDPVSOPZFSUIJO ϋϯυϥʔΛ࣮૷ ࢀߟ
    5IJO
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 αʔόʔΛ࣮૷શମ૾ ʜ
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29. 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
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    ϗετͱϙʔτ൪߸Λઃఆ
30. ͔͠͠
31. 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
    Ͳ͏͠Α͏ʜ DBMMϝιουʹ౉͢Ҿ਺͕Θ͔Βͳ͍⚠
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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 Θ͔Βͳ͍ͷͰ
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    SBDLVQ
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36. rack/lib/rack/lint.rb 3BDL-JOUΫϥεΛ֬ೝ
37. rack/lib/rack/lint.rb 3BDL-JOUΫϥεΛ֬ೝ
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40. 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 3BDL-JOUΛࢀߟʹ؀ڥม਺Λઃఆ
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41. 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 ϦΫΤετϝοηʔδ͔Β؀ڥม਺Λੜ੒
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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 44 45 46 47 48 49 50 51 simple_rack_compatible_server.rb
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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 @input = request.index(‘’) ? request[request.index(‘’) + 1] : ‘’ 45 46 47 48 49 50 51 simple_rack_compatible_server.rb
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52. 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 Ϩεϙϯεϝοηʔδ͸Ͳ͏ͳ͍ͬͯΔʁ
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60. 3BDL#PCZ1SPYZFBDI 3BDL#PCZ1SPYZ͸FBDIϝιουΛ࣋ͭ ࢖͑ΔͷͰ͸ʁ
61. 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 FBDIΛ࢖ͬͯϨεϙϯεϘσΟΛऔΓग़͢ …
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62. 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 ϨεϙϯεϘσΟΛݺͼग़͢ …
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67. 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
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68. 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
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69. 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$PNQBUJCMF4FSWFS4FSWFSTUBSU
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70. 46 begin 47 request = client.readpartial(2048).split(“\r\n”) 48 @method, path, @scheme = request.first.split 49 @path, @query = path.split(‘?’) 50 @input = request.index(‘’) ? request[request.index(‘’) + 1] : ‘’ 51 52 puts “Received request message: #{@method} #{@path} #{@schema}” 53 54 55 56 57 58 59 end simple_rack_compatible_server.rb 4JNQMF3BDL$PNQBUJCMF4FSWFS4FSWFSTUBSU
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71. 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$PNQBUJCMF4FSWFS4FSWFSTUBSU
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72. 46 begin 47 48 49 50 51 52 53 54 55 56 client.puts [status, header, ‘’, body].join(“\r\n”) 57 ensure 58 client.close 59 end simple_rack_compatible_server.rb 4JNQMF3BDL$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
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