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denoʹ͍ͭͯ 2018/06/28 @ Recruit Technologies TEPCO office
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Twitter: @yosuke_furukawa Github: yosuke-furukawa
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2018/11/23 - 24 Node ֶԂࡇ։࠵
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deno
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ྺ࢙ΛḪΔ͜ͱ9લ…
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Ryan Dahl ͕Node.jsʹ͍ͭͯτʔΫ
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https://www.slideshare.net/shigeki_ohtsu/node-v012tng12
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v0.1ͷެද͔Β9ޙ…
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10 THINGS I REGRET ABOUT NODE.JS
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Ryan DahlͷޙչϙΠϯτ • Dynamic Typed Language ʹͨ͜͠ͱ • Promise Λ࠾༻͠ͳ͔ͬͨ͜ͱ • Security ϞσϧΛצҊ͠ͳ͔ͬͨ͜ͱ • Gypʹ͔ͬͬͨ͜ͱ • moduleϋϯυϦϯά (package.json, node_modules, etc)
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Dynamic Typed Language
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Dynamic Typed Language • JavaScript࠷ྑ͍ಈతܕ͚ݴޠͩͱࢥͬͯΔ • ͔͠͠ͳ͕Βɺಈతܕ͚ݴޠҰճ͖ͬ͜Γͷܭ ࢉΛ͢ΔͳΒ·ͩ͠ɺԿ࣮ߦ͢Δͷʹద༻ ͢Δ͖͡Όͳ͍ͱࢥ͏ • Node.jsઃܭաఔʹ͓͍ͯෳͷτϥΠΤϥʔΛ ܁Γฦ͢ඞཁ͕͋Γɺͦͷ࣌ͷΤϥʔͷ༰Θ͔ Γʹ͘͘ɺΤϥʔͷղফ͖ͬΓͯ͠ͳ͍ɻ
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Dynamic Typed Language • JavaScript࠷ྑ͍ಈతܕ͚ݴޠͩͱࢥͬͯΔ • ͔͠͠ͳ͕Βɺಈతܕ͚ݴޠҰճ͖ͬ͜Γͷܭ ࢉΛ͢ΔͳΒ·ͩ͠ɺԿ࣮ߦ͢Δͷʹద༻ ͢Δ͖͡Όͳ͍ͱࢥ͏ • Node.jsઃܭաఔʹ͓͍ͯෳͷτϥΠΤϥʔΛ ܁Γฦ͢ඞཁ͕͋Γɺͦͷ࣌ͷΤϥʔͷ༰Θ͔ Γʹ͘͘ɺΤϥʔͷղফ͖ͬΓͯ͠ͳ͍ɻ ͔֬ʹͦ͏͔͠ΕΜ͚Ͳɺ͍·ͦΕ͍͏ʁ
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Dynamic Typed Language • ࣮ੲNode.jsΛશ෦TypeScriptʹ͠Α͏ͱ͠ ͨΓɺCoffeeScriptʹ͠Α͏͍ͬͯ͏PR͕ ཱͬͨ͜ͱ͕͋ͬͨɻ • ͪΖΜશ෦ফ͞Ε͖ͯͨɻ
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PromiseΛ࠾༻Ͱ͖ͳ͔ͬͨ
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Promise • 2009ʹҰ࣮͞Εͨͷͷɺ2010ʹ ؙ͝ͱফͯ͠͠·ͬͨɻ • ࠓͰ۪͔ͳܾஅͩͬͨͱࢥ͍ͬͯ·͢ɻ • async/awaitͷநԽʹඞཁͰͨ͠ɻ
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Promise • 2009ʹҰ࣮͞Εͨͷͷɺ2010ʹ ؙ͝ͱফͯ͠͠·ͬͨɻ • ࠓͰ۪͔ͳܾஅͩͬͨͱࢥ͍ͬͯ·͢ɻ • async/awaitͷநԽʹඞཁͰͨ͠ɻ PromiseͷΛ͢Δͱͷલ͕͘ͳΔ
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Promise • Ұ masuidrive ͞Μ͕nodeͷඪ४APIΛͯ͢Promiseʹ͠ ͨࣄ͕͋ͬͨɻ • ҰํɺIRCͷதͰɺʮPromise͕ඪ४ʹͳΔ͔ෆ໌ͩ͠ɺ callbackͷ͕simpleͰΑ͘Ͷʁʯ͍ͬͯ͏͕ٞ͋ͬͨɻ • ͔ͯ͘͠ɺPromiseͷίʔυͯ͢ফ͞Εͯ͠·ͬͨɻ • ͜Ε͕ੈʹݴ͏ʮmasuidrive ͷ൵ܶʯͰ͋Δɻ
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Security ϞσϧΛצҊ͠ͳ ͔ͬͨ͜ͱ
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SecurityϞσϧΛצҊ͠ͳ͔ͬ ͨ͜ͱ • V8ͦΕࣗsecureͳsandboxϞσϧΛදݱ ͍ͯ͠·͢ɻ • ͬͱྑ͍ηΩϡϦςΟʹͰ͖ͨͣɻ • LinterΛಈ͔͚ͩ͢Ͱ networkͷΞΫηε ϑΝΠϧॻ͖ࠐΈΛ͢Δඞཁͳ͍Ͱ͢ΑͶʁ
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SecurityϞσϧΛצҊ͠ͳ͔ͬ ͨ͜ͱ • v8͚ͩͩͱ ϑΝΠϧಡΈࠐΈɺॻ͖ࠐΈͰ͖ ͳ͍͠ɺωοτϫʔΫΞΫηεͰ͖·ͤΜɻ • ඪ४ग़ྗͷconsole.logv8ͷ֎Ͱ͢ɻ • ͜ΕΒΛsandboxͷதͰదٓύʔϛογϣϯΛಘ ͳ͕Β࣮ߦͰ͖ΕͬͱΑΓྑ͍ηΩϡϦςΟ ϞσϧΛఏڙͰ͖ͨɺͱݴ͍͍ͨͷͰ͠ΐ͏ɻ
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GYPΛ࠾༻ͨ͜͠ͱ
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GYPΛ࠾༻ͨ͜͠ͱ • GYPେ͖ͳࣦഊͩͬͨ • V8͕GYPΛ࠾༻͍ͯͯ͠ɺnode.jsͦΕʹ҆қʹ ͔ͬͬͯ͠·ͬͨɻ • v8GYP͔ΒgnʹҠΓNode.jsͷgypϢʔβʔऔΓ ͞Εͯ͠·ͬͨɻ • ࠓͳΒͦ͏͠ͳ͍ɺ FFI Λ࠾༻͢Δɻ
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GYPΛ࠾༻ͨ͜͠ͱ • FFI (Foreign Function Interface)ͷ͕ϙʔλϒ ϧͰݺͼ͍͢ҰํͰɺgypͷ͕ߴͩͱ͞Ε ͍ͯͨɻ • ੑೳΛ༏ઌͨ݁͠ՌɺgypΛ࠾༻͕ͨ͠ɺࠓ gyppython2Ͱ͋ΓɺgypաڈͷҨ ࢈ʹͳͬͯ͠·͍·ͨ͠ɻ
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moduleϋϯυϦϯάશൠ
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moduleϋϯυϦϯάશൠ • package.jsonपΓɺෆཁͳใ͕ଟ͗͢Δ • require()ͨ࣌͠ʹnode_modulesҎԼʹ͋ΔmainϑΟʔϧυΛউ खʹಡΉͳͲɺfancyͳڍಈ͕ଟ͍ʢnpmʹ͋Δͷͳͷ͔ɺ localͷదͳϑΝΠϧͳͷ͔Θ͔Γʹ͍͘ʣ •
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moduleϋϯυϦϯάશൠ
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moduleϋϯυϦϯάશൠ • moduleͷղܾΞϧΰϦζϜ͕૬ෳࡶʹͳͬ ͯ͠·ͬͨɻ • ϒϥβͷsemantics͔Β֎Εͯ͠·ͬͨɻ
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moduleϋϯυϦϯάશൠ • module ͷղܾΞϧΰϦζϜ node_modules ͷґଘ ؔΛͨͲͬͯґଘղܾΛ͢Δɻ • ·ͨɺ moduleࢦఆݩ͔Βͷ૬ରύεͰϑΝΠϧΛࢦ ఆ͢Δ͕ɺ $NODE_PATH ڥมʹύε͕ηοτ͞Ε ͍ͯΔͱ͔ͦ͜ΒಡΈࠐΉɻ • ͜ͷଞʹ͍͔ͭ͘ hacky ͳํ๏͕͋Δ͕ɺͲΕඍົ
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moduleϋϯυϦϯάશൠ
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moduleϋϯυϦϯάશൠ • ".js" ͳ͠ͰಡΈࠐΊΔ • "index.js" লུՄೳ • ͳͲͳͲɺϑΝϯγʔͳػೳ͕ଟ͘ɺ࣮ͦΕ͕ ෳࡶ͞ͱόάͷԹচʹͳΓ͍͢ɻ • লུͪ͠Ό͏ͱɺϑΥϧμͳͷ͔ϑΝΠϧͳͷ͔ ݟ͚͕͔ͭͳ͍ɻ
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ͦ͜Ͱ deno Λ࡞ͬͨ
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deno v8 Ͱಈ͘ηΩϡΞͳ TypeScript ࣮ߦڥ
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TypeScript
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TypeScript • denoTypeScriptΛ࠾༻ͨ͠ • TypeScriptDartͳͲͷͷͱҟͳΓɺ JavaScriptͷεʔύʔηοτͱ͍͏Ґஔ͚ͮ • ڊେͳγεςϜʹରԠͰ͖Δɻ
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sandboxηΩϡϦςΟϞσϧ
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sandbox ηΩϡϦςΟϞσϧ • denosandboxͰಈ͘ • v8ͷϨΠϠworkerͰJSͷruntime͕ಈ͖ɺϑΝ ΠϧωοτϫʔΫʹΞΫηε͢Δͱ͖͚ͩಛ ݖϞʔυʹͳΔɻ • ಛݖϞʔυͷϓϩηεͱruntimeؒͰ௨৴͢Δࡍ protocol bufferΛͬͯ௨৴͢Δɻ
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sandbox ηΩϡϦςΟϞσϧ • denosandboxͰಈ͘ • v8ͷϨΠϠworkerͰJSͷruntime͕ಈ͖ɺ ϑΝΠϧωοτϫʔΫʹΞΫηε͢Δͱ͖ ͚ͩಛݖϞʔυʹͳΔɻ
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sandbox ηΩϡϦςΟϞσϧ • denosandboxͰಈ͘ • v8ͷϨΠϠworkerͰJSͷruntime͕ಈ͖ɺ ϑΝΠϧωοτϫʔΫʹΞΫηε͢Δͱ͖ ͚ͩಛݖϞʔυʹͳΔɻ ͓ɺOS͔Αɻɻɻ
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ϞδϡʔϧγεςϜͷγϯϓϧԽ
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ϞδϡʔϧγεςϜͷγϯϓϧ Խ • NodeͷطଘϞδϡʔϧͱͷੑٻΊͯ· ͤΜɻ • import૬ରύε͔ઈରύεɺ͘͠URL ͚ͩͰ͔͠ࢦఆͰ͖·ͤΜɻ import { test } from "https://unpkg.com/
[email protected]
/testing.ts" import { log } from "./util.ts"
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ϞδϡʔϧγεςϜͷγϯϓϧ Խ • NodeͷطଘϞδϡʔϧͱͷੑٻΊͯ· ͤΜɻ • import૬ରύε͔ઈରύεɺ͘͠URL ͚ͩͰ͔͠ࢦఆͰ͖·ͤΜɻ import { test } from "https://unpkg.com/
[email protected]
/testing.ts" import { log } from "./util.ts" ͍͗͞Α͗͢Δɻ
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2018Ͱ͋Δ͜ͱΛར༻ͨ͠ Ϟσϧ • Ωϟον͞Εͳ͍ྫ֎͕ى͖ͨΒଈ࠲ʹఀࢭ͢Δ • top-level await Λαϙʔτ͢Δ • ػೳతʹॏͳΔ߹ϒϥβͱͷޓΛ༏ઌ͢ Δ • ॳGoͰ࡞͍͕ͬͯͨɺࠓRustͱC++ʹͳͬ ͍ͯΔɻ
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2018Ͱ͋Δ͜ͱΛར༻ͨ͠ Ϟσϧ • Ωϟον͞Εͳ͍ྫ֎͕ى͖ͨΒଈ࠲ʹఀࢭ͢Δ • top-level await Λαϙʔτ͢Δ • ػೳతʹॏͳΔ߹ϒϥβͱͷޓΛ༏ઌ͢ Δ • ॳGoͰ࡞͍͕ͬͯͨɺࠓRustͱC++ʹͳͬ ͍ͯΔɻ ͪͳΈʹಈ͔ͯ͠Կى͖·ͤΜͰͨ͠ɻ
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ײ
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ײ • ·ͩ·ͩϓϩτλΠϓʢͱ͍͏ΑΓϋϩʔϫʔϧυϨϕϧʣ • Node.jsͰࢀߟʹͳΔͱ͜Ζଟͦ͏ • Node.jsʹ͓͚Δ module ͱ package ͷ͜ͱͰ͋ΓɺσΟϨΫτϦ Λࢦͯ͠Δɻ • ҰํͰ ES Modules deno ʹ͓͚Δ module ͱ͍͏ͷϑΝΠϧͷ ࣄͰ͋Γɺ࠷ݶͷ୯Ґ͔࣋ͨ͠ͳ͍ɻ • Կ͕Ұମਖ਼ղͩͬͨͷ͔·ͩΘ͔Βͳ͍ɻ໘നͦ͏ͳ͓ͪΌ͕ग़ ͖ͯͨͷͰ৮Δͷ͓͢͢Ίɻ