JS RPCを理解する - Speaker Deck

JS RPCを理解する

by Yusuke Wada

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+431$Λཧղ͢Δ $MPVE fl BSF.FFUVQ0TBLB .BZ :VTVLF8BEB

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ࣗݾ঺հ w :VTVLF8BEB w 8FCGSBNFXPSLEFWFMPQFS w %FWFMPQFS"EWPDBUF!$MPVE fl BSF w #PLFUFDPGPVOEFS w $SFBUPSPG)POP w IUUQTHJUIVCDPNZVTVLFCF IUUQTIPOPEFW

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ࣗݾ঺հΩʔϫʔυ

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௒લஔ͖

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ΞδΣϯμ લஔ͖ ·ͣ#JOEJOHTΛཧղ͢Δ 4FSWJDF#JOEJOHT +431$ ྫ 4NBSU1MBDFNFOUͱͷະདྷ ϚʔέοτϓϨΠεʁ

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લஔ͖

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͜ͷൃද͸$MPVEGMBSF8PSLFSTͷ৽ػೳ ʮ+431$ʯʹ͍ͭͯཧղ͢ΔͨΊͷ΋ͷͰ͢ ʢΘΓͱ֓೦తͳ࿩Ͱ͢ʣ

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31$ͱ͸ʁ

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31$ͱ͸ w 3FNPUF1SPDFEVSF$BMM w ԕִʢϦϞʔτʣʹ͋Δίϯϐϡʔλͷؔ਺ʢϓϩγʔδϟʣΛ࣮ߦʢίʔ ϧʣ͢Δख๏ w ྫ w H31$ w +40/31$ w 9.-31$

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Α͏͸ʢ8PSLFSʣͷݺͼग़ ͠ํʹ͍ͭͯͷ࿩Λ͠·͢

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,FOUPOࢯͷϒϩά w ೥݄%FWFMPQFS8FFLͰൃද͞Εͨͭͷϒϩάهࣄ w ʮ8IZ8PSLFSTFOWJSPONFOUWBSJBCMFTDPOUBJOMJWFPCKFDUTʯ w ʮ8FWFBEEFE+BWB4DSJQUOBUJWF31$UP$MPVE fl BSF8PSLFSTʯ w "*੡඼ͷΞοϓσʔτ΍%ͷ("ʹӅΕͨςΫχΧϧͳهࣄ w ͜Ε͔Β঺հ͢Δ+431$Λཧղ͢Δ伴ͱͳΔ

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IUUQTCMPHDMPVE fl BSFDPNXPSLFSTFOWJSPONFOUMJWFPCKFDUCJOEJOHT l8IZ8PSLFSTFOWJSPONFOUWBSJBCMFTDPOUBJOMJWFPCKFDUTz

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IUUQTCMPHDMPVE fl BSFDPNKBWBTDSJQUOBUJWFSQD l8FWFBEEFE+BWB4DSJQUOBUJWF31$UP$MPVEGMBSF8PSLFSTz

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͜Ε͔Β࿩͢͜ͱ͸͜ͷϒ ϩάهࣄʹجͮ͘

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·ͣ#JOEJOHTΛཧղ͢Δ

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#JOEJOHTͱ͸ʁ w $MPVE fl BSFͷϓϩμΫτ΁8PSLFST͔Βͭͳ͙ͨΊͷ֓೦ͱखஈ w ྫ w "*ɺ"OBMZUJDT&OHJOFɺ#SPXTFS3FOEFSJOHɺ%ɺ &OWJSPONFOU7BSJBCMFTɺ)ZQFSESJWFɺ,7ɺ2VFVFTɺ3ɺ 3BUF-JNJUJOHɺ7FDUPSJ[F

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֤छϓϩμΫτ

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,7Λ࢖͏৔߹ͷ࣮૷

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FOW.:@,7 ,7ΦϒδΣΫτͦͷ΋ͷʹͳ͍ͬͯΔ ྫHFU QVU EFMFUF ͕࢖͑Δ

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ଞʹॻ͘͜ͱ͸XSBOHMFSUPNMͷઃఆ͚ͩ ίʔυ಺ͰͲͷΑ͏ͳ໊લͰݺͼग़͔͢ʁ ࡞ͬͨ,7ͷ*%

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΋͠ɺ#JOEJOHTΛ࢖Θͳ ͔ͬͨΒͲ͏ͳΔ͔ʁ

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4%,ΛJNQPSU ؀ڥม਺͔ΒΩʔΛऔಘ ֎෦"1*΁઀ଓ औಘͨ͠ΦϒδΣΫτͰૢ࡞

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ͭͷ໰୊ ηΩϡϦςΟΩʔͷ؅ཧɺΩʔͷॲཧΛॻ͔ͳͯ͘͸͍͚ͳ͍ ։ൃऀମݧ4%,Λ࢖Θͳ͍ͱ͍͚ͳ͍ɺADPOOFDUAͷॲཧ͸ඞཁ

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ͭΛղܾ͍ͯ͠Δͷ͕#JOEJOHTͰ͋Δ ೝূΩʔΛॻ͘ඞཁ͕ͳ͍ 4%,ͰΦϒδΣΫτΛ࡞Βͣ௚઀+4ͷϝιουͰݺ΂Δ

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4FSWJDF#JOEJOHTͱ͸ʁ

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8PSLFS" 8PSLFS# ಺෦௨৴ͳͷͰ଎͍ $MPVE fl BSFωοτϫʔΫ 8PSLFS"͔Β#Λͭͳ͙

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ެࣜͷਤ IUUQTEFWFMPQFSTDMPVE fl BSFDPNXPSLFSTSVOUJNFBQJTCJOEJOHTTFSWJDFCJOEJOHT

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࣮૷ w ΠϯλʔφϧͳGFUDIΛ͔͚Δ

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4FSWJDF#JOEJOHTͷϢʔεέʔε w ϑΝΠϧ༰ྔ੍ݶΛආ͚Δ w ੹຿ͷ෼ׂ w ϚΠΫϩϑϩϯτΤϯυ IUUQTCMPHDMPVE fl BSFDPNCFUUFSNJDSPGSPOUFOET

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8FCϖʔδΛύʔπʹ෼͚Δ

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ͦΕͧΕͷύʔπΛ8PSLFSʹͯ͠4FSWJDF#JOEJOHTͰͭͳ͙

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Α͍ɻ͕ɺ࣮͸ͦΜͳʹ࢖ ΘΕ͍ͯͳ͍ ࢖͍উख͕ѱ͍ʜʁ

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+431$

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,FOUPOͷϒϩάهࣄͱڞʹެ։ IUUQTEFWFMPQFSTDMPVE fl BSFDPNXPSLFSTSVOUJNFBQJTSQD

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+431$Λཧղ͢ΔͨΊͷͭͷΞϓϩʔν #JOEJOHT8PSLFSΛΧελϜ#JOEJOHTͱͯࣗ͠෼Ͱͭ͘ ΕΔ 4FSWJDF#JOEJOHT4FSWJDF#JOEJOHT͕؆୯ʹॻ͚Δ ͜ͷͭΛຬͨ͢ͷ͕+431$

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8PSLFS" 8PSLFS# #JOEJOHͱͯ͠ݺͼग़ͤΔ 4FSWJDF#JOEJOHTͰܨ͍ͰΔ

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ʮి୎ʯͷ৔߹ #JOEJOHTʮి୎ʯͱ͍͏#JOEJOHʢ8PSLFSͰ࣮૷͞Ε ΔʣΛ࡞ΕΔ 4FSWJDF#JOEJOHTʮి୎ʯͱ͍͏8PSLFSΛ؆୯ʹݺͼ ग़ͤΔ

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8PSLFS" ి୎ #JOEJOHͱͯ͠ݺͼग़ͤΔ 4FSWJDF#JOEJOHTͰܨ͍ͰΔ DOW$"-$BEE SFUVSOBC

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࣮૷ํ๏

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ి୎ͷ࣮૷ݺͼग़͠Մೳͳ8PSLFSΛ࡞Δ 8PSLFS&OUSZQPJOUΛFYUFOETͨ͠ΫϥεΛFYQPSU͢Δ͚ͩ

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ݺͼग़ͯ͠ΈΑ͏

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XSBOHMFSUPNMʹఆٛΛ௥Ճ͢Δ ίʔυ಺ͰͲͷΑ͏ͳ໊લͰݺͼग़͔͢ʁ ݺͼग़͢8PSLFSͷ໊લ

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8PSLFS͔Βݺͼग़͢ ͜͜

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ͭ·Γʜ $BMDͱ͍͏αʔϏεΛ$"-$ͱ͍͏#JOEJOHͱͯ͠ར༻͢Δ ݺͼग़͢8PSLFSͱ$BMDؒ͸4FSWJDF#JOEJOHTͰ઀ଓ͞ΕΔ ͞Βʹɺ+BWB4DSJQUωΠςΟϒͳݺͼग़͕͠Ͱ͖Δ ʮ+4/BUJWF31$ʯ

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5ZQF4DSJQUͷܕ͕ͪΌΜͱͭ͘

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+431$Λ࢖͏ ͱخ͍͜͠ͱ

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+431$ͩͱ#JOEJOHTͷͭΛڗडͰ͖Δ ηΩϡϦςΟ΁ͷߟྀݺͼग़͠ʹ͸γʔΫϨοτ͕ඞཁͳ͍ ։ൃऀମݧ#JOEJOHͱͯ͠ಛʹ+454ωΠςΟϒʹݺ΂Δ

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ྫ

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8FC #MPH #JOEJOHͱͯ͠ݺͼग़ͤΔ 4FSWJDF#JOEJOHTͰܨ͍ͰΔ DOW#-0(DSFBUF1PTU ECFYFDVUF A*/4&35*/501PTUTʜA ϒϩάαʔϏε w %#Λѻ͏αʔϏεͱͦΕΛݺͼग़͢6*

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ίʔυྫ

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4NBSU1MBDFNFOUͱͷະདྷ

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࣮͸͜ͷ+431$ ͭͷϝϦοτʹՃ͑ͯ΋͏ͻͱͭΞπ͍ͷ͕ʜ

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4NBSU1MBDFNFOU ͱҰॹʹ࢖͏݅

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4NBSU1MBDFNFOUͱ͸ʁ w ϢʔβʔଆΑΓόοΫΤϯυʢΦϦδϯʣʹ8PSLFS͕͍ۙ ํ͕ޮ཰తͳ͜ͱ͕͋Δ w 8PSLFSͷ৔ॴΛΑ͠ͳʹͯ͘͠ΕΔ

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͍ΘΏΔʮΤοδʯͷΑ͞ w Ϣʔβʔͱ8PSLFS͕͍ۙ Ϣʔβʔ 8PSLFS ͍ۙ

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8PSLFS͕Ϣʔβʔʹ͍͚ۙͲσʔλϕʔε͔Β͸ԕ͍ w σʔλϕʔεͱͷ΍ΓͱΓ͕ଟ͍৔߹͸ඇޮ཰

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8PSLFSΛσʔλϕʔεͷۙ͘ʹஔ͜͏ w Ϣʔβʔ͔Βԕ͍͚Ͳɺσʔλϕʔεͱͷ΍ΓͱΓ͕ଟ͍৔ ߹͸ޮ཰త

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ΤϯτϦʔϙΠϯτ͝ ͱʹϩέʔγϣϯ͕࠷ద Խ͞ΕΕ͹خ͍͠

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ϒϩάαʔϏεͷ৔߹5PLZPฤ w #MPH%#͕ؒ஗͍ #MPH 8FC Ϣʔβʔ %# 5PLZP 5PLZP 5PLZP -POEPO ଎͍ ଎͍ ஗͍

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ϒϩάαʔϏεͷ৔߹-POEPOฤ w Ϣʔβʔ8FC͕ؒ஗͍ #MPH 8FC Ϣʔβʔ %# 5PLZP -POEPO -POEPO -POEPO ଎͍ ଎͍ ஗͍

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ϒϩάαʔϏεͷ৔߹ཧ૝ w %#͕Ϣʔβʔ͔Βԕ͍৔߹ɺ#MPH͚ͩ%#ʹ͍ۙͱྑ͍ #MPH 8FC Ϣʔβʔ %# 5PLZP 5PLZP -POEPO -POEPO ͍͔ۙΒ଎͍ ಺෦͔ͩΒ଎͍ ͍͔ۙΒ଎͍

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4FSWJDF#JOEJOHTͷྫ w ΋͏͢ͰʹରԠ͸͍ͯ͠Δ

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ཧ૝తͳॻ͖ํ "1"$ʹ͋Δ%#Λऔಘ͢Δ 4FSWJDF#JOEJOHͰ઀ଓ͞Εͨ#-0(Λݺͼग़͢

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ϚʔέοτϓϨΠεʁ

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#JOEJOHTϚʔέοτϓϨΠε͕Ͱ͖Δ͔΋ʁ w Ϣʔβʔ͕࡞ͬͨΧελϜ#JOEJOHT͕ྲྀ௨͢Δ w ݱࡏ͸࡞ͬͨΞΧ΢ϯτ಺Ͱ͔͠࢖͑ͳ͍ w ྫ w %JTDPSEϘοτ#JOEJOH w 4MBDLϘοτ#JOEJOH w 4USJQFܾࡁ#JOEJOH

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͓͞Β͍

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+431$Ͱخ͍͜͠ͱ w ηΩϡϦςΟ΁ͷߟྀ w ։ൃऀମݧͷ޲্ w 4NBSU1MBDFNFOUͱ૊Έ߹ΘͤΒΕΔ w ϚʔέοτϓϨΠεͰເ͕޿͕Δ