new_urlparser.pdf

Transcript

1. Node.js v20 Ͱ௥Ճ͞Ε
   ͨ URL Parser Ada ʹͭ
   ͍ͯ
   2023/05/09 @ ؔ੢NodeֶԂ
   

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2. Twitter: @yosuke_furukawa
   
   
   Github: yosuke-furukawa
   

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3. URL Parser ͳʹͦΕ͓͍͍͠
   ͷʁ
   • URL Parser ͦ΋ͦ΋Կʁ
   > new URL("https://example.com");
   URL {
   href: 'https://example.com/',
   origin: 'https://example.com',
   protocol: 'https:',
   username: '',
   password: '',
   host: 'example.com',
   hostname: 'example.com',
   port: '',
   pathname: '/',
   search: '',
   searchParams: URLSearchParams {},
   hash: ''
   }
   

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4. URL Parser ͳʹͦΕ͓͍͍͠
   ͷʁ
   • URL Parser ͦ΋ͦ΋Կʁ
   > new URL("https://example.com");
   URL {
   href: 'https://example.com/',
   origin: 'https://example.com',
   protocol: 'https:',
   username: '',
   password: '',
   host: 'example.com',
   hostname: 'example.com',
   port: '',
   pathname: '/',
   search: '',
   searchParams: URLSearchParams {},
   hash: ''
   }
   ͜͏͍͏΍ͭ
   

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5. URLͬͯͨ͘͞ΜͷύʔπͰͰ
   ͖ͯΜͶΜɻ
   • ͦΕͧΕ෦෼͝ͱʹ෼ׂ͓ͯ͘͠ͱ৭ʑྑ͍͜ͱ͕͋Δɻ
   
   
   • ྫ͑͹ϧʔςΟϯά
   
   
   • ྫ͑͹ϦΫΤετ࣮ߦ
   
   
   • Node.js ͩͬͯ ESM ͷϩʔμʔ಺ͰϞδϡʔϧऔಘ͢Δͱ͖࢖ͬ
   ͯͨΓ͢Δ
   

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6. URL Parser ͕ʁͲ͏ͳͬͨΜʁ
   • ؆୯ʹݴ͏ͱ଎͘ͳͬͨɻ
   
   
   • Node.js v20 ͔Β v19 ͷൺֱ
   

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7. URL Parser ͕ʁͲ͏ͳͬͨΜʁ
   • ͞ΒʹDeno v1.32.1 ΍Bun v0.5.8ͱͷൺֱ
   

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8. ԿΛͨ͠Β଎͘ͳͬͨͷ͔
   

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9. Legacy URL Parser
   • const url = require("url");
   
   
   • Ͱݺͼग़͢΍ͭ
   
   
   • JavaScript ੡
   
   
   • Legacy URL Parser ͱͯ͠ղઆ͞Ε͍ͯΔ
   
   
   • طʹࠓ͸ deprecated ѻ͍
   

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10. Ұݸલͷ URL Parser
    • new URL() Ͱݺͼग़͢΍ͭ
    
    
    • JavaScript Ͱ binding ͞ΕͯΔ͕ɺ parser ຊମ
    ͸ C++ (not ada)
    
    
    • φΠʔϒͳ࣮૷
    
    
    • ଎͍͜ͱΑΓ΋ spec ʹ஧࣮ͳ͜ͱΛ໨ࢦͯͨ͠
    

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11. JavaScript vs C++
    

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12. JavaScript vs C++
    • Αٞ͘࿦ʹͳΔ໰୊
    
    
    • JavaScript ͰίʔυΛॻ͘ͱॳظίετ͸஗͍͕ɺJITͷӨڹͰߴ଎ԽͰ
    ͖Δɻ
    
    
    • C++ ͰίʔυΛॻ͘ͱ଎͍͕ɺJITͷԸܙ͸ड͚ΒΕͳ͍ɻ
    
    
    • C++ Ͱશ෦ॻ͍ͨΒ͡Ό͋ྑ͍ͷ͔ʁͱ͍͏ͱɺͦ͏Ͱ΋ͳ͍ɻ։ൃί
    ετ΍ϝϞϦ΁ͷέΞ͕ॏཁʹͳΔɻ
    
    
    • ͜ͷ࣌఺Ͱ͸ WHATWG URL vs Legacy URL ͸ͲͪΒ΋࢒͍ͯ͘͠ํ਑
    Ͱ։ൃ͞Ε͍ͯͯɺύϑΥʔϚϯεൺֱ͸ͦΜͳʹଟ͘͞Ε͍ͯͳ͍ɻ
    

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13. JavaScript and C++
    

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14. JavaScript and C++
    • ݁ہ C++ Ͱॻ͘ͱͯ͠΋ JavaScript ͷΠϯλϑΣʔεͰఏڙ͞
    Ε͍ͯΔͷͰɺJS <=> C++ ؒͷ৘ใͷड͚౉͕͠ඞཁʹͳΔɻ
    
    
    • ݴ͍׵͑Δͱ JS ͷੈքͱ C++ ͷੈք͕ Node.js ʹ͸ଘࡏ͢Δɻ
    
    
    • JS ͔Β C++ ʹ৘ใͷड͚౉͠Λ͢Δ࣌ʹߦ͍ͬͯΔͷ͕ String
    ͷ serialize ͱ͍͏ॲཧɻ
    
    
    • Node.jsͰBuffer Λ௚઀࢖ͬͨ͜ͱ͕͋Δਓ͸ serialize ͞Εͨจ
    ࣈྻΛ௚઀࢖͍ͬͯΔɻ
    

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15. Serialize ॲཧΛ೗Կʹߴ଎ʹ
    ͢Δ͔͕ϙΠϯτ
    

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16. ݱࡏͷ URL Parser
    • new URL() Ͱݺͼग़͢΍ͭ
    
    
    • Ada ͱݺ͹ΕΔύʔαʔ(C++)Ͱ࣮૷͞Εͯ
    Δɻ
    
    
    • JSͱC++ͷόΠϯσΟϯά΋༻ҙ͞Ε͍ͯΔɻ
    
    
    • String ͷ serialize ΛۃྗলྗԽ͍ͯ͠Δɻ
    

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17. ࡞ઓ1:
    
    
    จࣈྻΛύʔε͢Δ࣌ʹશ෦
    Λจࣈʹม׵͠ͳ͍࡞ઓ
    

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18. શ෦Λจࣈʹม׵͠ͳ͍࡞ઓ
    • URL ͷͲ͔͜ΒͲ͜·Ͱ͕Կͷ৘ใͳͷ͔ͱ
    ͍͏ offset ஋͚͓ͩ࣋ͬͯ͘ɻ
    

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19. શ෦Λจࣈʹม׵͠ͳ͍࡞ઓ
    • URL ͷͲ͔͜ΒͲ͜·Ͱ͕Կͷ৘ใͳͷ͔ͱ
    ͍͏ offset ஋͚͓ͩ࣋ͬͯ͘ɻ
    จࣈྻͷTFSJBMJ[F͸Ұճ͚ͩʂͲ͜ͷจࣈ͔ΒͲ͜ͷจࣈ·Ͱ͕Կͳͷ
    ͔Λ΋͓͖ͬͯɺͦΕ͕௚઀+4ʹόΠϯυ͞ΕΔ࢓૊ΈΛ࡞ͬͯΔ
    

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20. ࡞ઓ2:
    
    
    C++͔ΒJSʹ௚઀όΠϯσΟ
    ϯά͢Δ࡞ઓ
    

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21. C++͔ΒJSʹ௚઀όΠϯσΟϯ
    ά͢Δ࡞ઓ
    • AliasedUint32Arrayͱݺ͹ΕΔಛघͳ
    TypedArray Λ࢖ͬͯ C++ ࣮૷͔Β௚઀JSʹ
    ૹΔɻ
    
    
    • Serialize Λͱ͜ͱΜߴ଎Խ͢Δɻ
    

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22. ࡞ઓ3:
    
    
    ஗ԆಡΈࠐΈ
    

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23. ஗ԆಡΈࠐΈ
    • ඞཁʹͳΔΪϦΪϦ·Ͱ࣮ߦ͠ͳ͍࡞ઓ
    
    
    • ΞΫηε͢Δͱ͖ͷඞཁͳϓϩύςΟ͕Θ
    ͔ͬͨΒͦ͜·ͰύʔεΛߦ͏ɻ
    

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24. ͜͏ͯ͠ߴ଎Խ͞Εͨ
    
    
    Ada Λ࢖ͬͨURL Parser͕
    
    
    ஀ੜͨ͠
    

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25. Enjoy Node.js v20!!
    

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