これからのNode.jsの話をしよう

͜Ε͔Βͷ/PEFKTͷ࿩ Λ͠Α͏ !ZPTVLF@GVSVLBXB

!ZPTVLF@GVSVLBXB ೔ຊ/PEFKTϢʔβʔάϧʔϓ৽୅ද

!ZPTVLF@GVSVLBXB $VSSFOU.Z803,4 4VQQPSU%FWFMPQFST $SFBUJOH(BNFT $SFBUJOH'SBNFXPSLT

!ZPTVLF@GVSVLBXB $VSSFOUNZJOUFSFTUT 1FSGPSNBODF*NQSPWFNFOU 3FBMUJNF "OZPUIFSOFXUFDIT MJLF(P %PDLFS $MJFOUTJEF.7$ FUD

!ZPTVLF@GVSVLBXB $VSSFOU.ZGBWT 1FSGPSNBODF*NQSPWFNFOU 3FBMUJNF "OZPUIFSOFXUFDIT MJLF(P %PDLFS $MJFOUTJEF.7$ FUD 'PMMPXNF

ຊ୊

ຊ୊ /PEFKTOFXT ؾʹͳΔ/PEFKTϥΠϒϥϦ ౦ژ/PEFֶԂͷࠓޙ

/PEFKTOFXT

/PEFKTOFXT Ϧʔμʔ͕*[BBDT͔Β 5+'POUBJOFʹ

5+'POUBJOF͸͜Μͳਓɹ ʹDPSFUFBNʹKPJO $*΍UFTUϝΠϯʹ୲౰ 8BMNBSUͷϝϞϦϦʔΫΛൃݟ ͨ͠Γͱ௿ϨΠϠʔʹ΋ڧ͍

5+'POUBJOF͸͜Μͳਓɹ ʹDPSFUFBNʹKPJO $*΍UFTUϝΠϯʹ୲౰ 8BMNBSUͷϝϞϦϦʔΫΛൃݟ ͨ͠Γͱ௿ϨΠϠʔʹ΋ڧ͍ ౦ژ/PEFֶԂࡇ ʹݺͼ͍ͨ

/PEFKTOFXT

/PEFKTOFXT W΋͏͙͢Ͱ͢Ͷ

WͰ৽͘͠ͳΔ͜ͱ 4USFBN DMVTUFSSPVOESPCJO NVMUJQMFDPOUFYUJOWN TZODDIJME@QSPDFTT USBDJOHBQJ QFSGPSNBODFJNQSPWFNFOU FUD

WͰ৽͘͠ͳΔ͜ͱ 4USFBN DMVTUFSSPVOESPCJO NVMUJQMFDPOUFYUJOWN TZODDIJME@QSPDFTT USBDJOHBQJ QFSGPSNBODFJNQSPWFNFOU FUD ࢒೦ͳ͕ΒWͰ͸&4σϑΥϧτʹ͸ͳΒͳ͍

WͰ৽͘͠ͳΔ͜ͱ ٞ࿦ͷྲྀΕΛϒϩάʹ঺հͯ͠ΔͷͰ͕࣌ؒ͋Ε͹ݟ ͍ͯͩ͘͞ɻ

WͰ৽͘͠ͳΔ͜ͱ 4USFBN DMVTUFSSPVOESPCJO NVMUJQMFDPOUFYUJOWN TZODDIJME@QSPDFTT USBDJOHBQJ QFSGPSNBODFJNQSPWFNFOU FUD

TZODDIJME@QSPDFTT DIJME@QSPDFTTʹҎԼͷ"1*͕௥Ճ͞ΕΔɻ FYFD4ZOD FYFD'JMF4ZOD TQBXO4ZOD

TZODDIJME@QSPDFTT DIJME@QSPDFTTʹҎԼͷ"1*͕௥Ճ͞ΕΔɻ FYFD4ZOD FYFD'JMF4ZOD TQBXO4ZOD HSVOUͱ͔ͷλεΫϥϯφʔͰ خ͍͠ػೳ

TZODDIJME@QSPDFTT %&.0

USBDJOH"1* QSPpMJOH༻ͷ"1* IFBQNFNPSZͷঢ়گΛϞχλͨ͠Γ UJDLຖʹVTFSͷ೚ҙͷΦϒδΣΫτΛUSBDFͰ͖ Δ

USBDJOH"1* %&.0

Wͷશػೳ͸঺հ͠ ͖Εͳ͍

Wͷશػೳ͸঺հ͠ ͖Εͳ͍ 4USPOH-PPQ͕͔ͳΓ ঺հͯ͠ΔͷͰݟΑ͏ /PEFֶԂࡇʹ4USPOH-PPQͷਓ ݺΜͰ΋͍͍͔΋

ؾʹͳΔϥΠϒϥϦ

ؾʹͳΔϥΠϒϥϦ 8"'ฤ

ؾʹͳΔϥΠϒϥϦ 8"'ฤ // Express! ! // response time! ! app.use(function(req,
res, next){! var start = new Date;! res.on('header', function(){! var ms = new Date - start;! res.setHeader('X-Response-Time', ms + 'ms');! });! next();! }); ! ! // response! ! app.use(function(req, res, next){! res.send(200, "Hello World");! }); // koa! ! // response time! ! app.use(function *(next){! var start = new Date;! yield next;! var ms = new Date - start;! this.set('X-Response-Time', ms + 'ms');! });! ! // response! ! app.use(function *(){! this.body = 'Hello World';! });

ؾʹͳΔϥΠϒϥϦ 8"'ฤ // Express! ! // response time! ! app.use(function(req,
res, next){! var start = new Date;! res.on('header', function(){! var ms = new Date - start;! res.setHeader('X-Response-Time', ms + 'ms');! });! next();! }); ! ! // response! ! app.use(function(req, res, next){! res.send(200, "Hello World");! }); // koa! ! // response time! ! app.use(function *(next){! var start = new Date;! yield next;! var ms = new Date - start;! this.set('X-Response-Time', ms + 'ms');! });! ! // response! ! app.use(function *(){! this.body = 'Hello World';! }); HFOFSBUPSZJFME Ͱͷະདྷ

ؾʹͳΔϥΠϒϥϦ 8"'ฤ // handle error! app.use(function *(next) {! // try-catchͰΤϥʔϋϯυϦϯάͰ͖Δ!
try {! yield next;! } catch (err) {! this.status = 500;! this.body = err.message;! }! });! ! // error thrower! app.use(function *(next) {! if (this.url === "/_err") {! throw new Error("Send Error");! }! yield next;! });!

ؾʹͳΔϥΠϒϥϦ 8"'ฤ // handle error! app.use(function *(next) {! // try-catchͰΤϥʔϋϯυϦϯάͰ͖Δ!
try {! yield next;! } catch (err) {! this.status = 500;! this.body = err.message;! // errorΠϕϯτΛൃߦ! this.app.emit("error", err, this);! }! });! ! // error thrower! app.use(function *(next) {! if (this.url === "/_err") {! throw new Error("Send Error");! }! yield next;! });! ΤϥʔϋϯυϦϯά௚ײత

ৄ͘͠͸

ৄ͘͠͸ ๻ͷॻ͍ͨLPBೖ໳هࣄΛ͝ҰಡԼ͍͞ɻ

ؾʹͳΔϥΠϒϥϦ SFBMUJNFฤ

ؾʹͳΔϥΠϒϥϦ SFBMUJNFฤ 4PDLFU*0 ͸৽͍͠1FSMͰ͋Δɻ

SFBMUJNFϥΠϒϥϦ͸ ࣮͸ͨ͘͞Μ͋Δ

SFBMUJNFϥΠϒϥϦ͸ ࣮͸ͨ͘͞Μ͋Δ TPDLFUJPʹ͚ͩ नΘΕΔඞཁͳ͍ɻ

Ͱ΋ͲΕ࢖͏ͷ

1SJNVT

1SJNVT ͦ͜Ͱɺ1SJNVTɻ USBOTGFS૚ͰFOHJOFJP GBZF TPDLKT CSPXTFSDIBOOFM XT͕ ࢖͑Δɺͦͷ্ͰTPDLFUJPͰαϙʔτ͍ͯ͠ΔΑ͏ͳ SPPNͱ͔ͷΞϓϦέʔγϣϯ૚Λߏங͢Δ

1SJNVT ͦ͜Ͱɺ1SJNVTɻ USBOTGFS૚ͰFOHJOFJP GBZF TPDLKT CSPXTFSDIBOOFM͕ ࢖͑Δɺͦͷ্ͰTPDLFUJPͰαϙʔτ͍ͯ͠ΔΑ͏ͳ SPPNͱ͔ͷΞϓϦέʔγϣϯ૚Λߏங͢Δ ೰ΜͰͳ͍Ͱ1SJNVT࢖͓͏ɺ ޙͰUSBOTGFS૚͸ม͑ΒΕΔɻ

ؾʹͳΔϥΠϒϥϦ ϑϩϯτΤϯυπʔϧฤ

ؾʹͳΔϥΠϒϥϦ ϑϩϯτΤϯυฤ ඦՖ៶ཚ͗ͯ͢ɺઆ໌͸ׂѪɻ

ؾʹͳΔϥΠϒϥϦ ϑϩϯτΤϯυπʔϧฤ ݸਓతʹ͸HVMQ CSPXTFSJGZ DPNQPOFOUJP

͜ͷޙCSPXTFSJGZͷ࿩ ͋Γ·͢ʂʂɹ

౦ژ/PEFֶԂͷࠓޙ

جຊํ਑ ೋ݄ʹҰ౓͸/PEFֶԂΛ։࠵ͯ͠ɺΈΜͳͷ ஌ݟΛूΊ͍ͨ ೥ʹҰ౓ɺ౦ژ/PEFֶԂࡇ͸։࠵͍ͨ͠ /PEFKTͷ࿩͹͔Γ͡Όͳͯ͘ผͳݴޠ͔Βֶ ΜͩΓɺ৽͍͠ࣄ͸ͲΜͲΜٵऩ͍ͨ͠

جຊํ਑ ೋ݄ʹҰ౓͸/PEFֶԂΛ։࠵ͯ͠ɺΈΜͳͷ ஌ݟΛूΊ͍ͨ ೥ʹҰ౓ɺ౦ژ/PEFֶԂࡇ͸։࠵͍ͨ͠ /PEFKTͷ࿩͹͔Γ͡Όͳͯ͘ผͳݴޠ͔Βֶ ΜͩΓɺ৽͍͠ࣄ͸ͲΜͲΜٵऩ͍ͨ͠ ͭ·Γ͜Ε·Ͱ௨Γ /PEFֶԂΛ΍Γ͍ͨ

ม͍͑ͨ͜ͱ ΋ͬͱελοϑҎ֎͔Βͷਓͷҙݟ΋ฉ͖͍ͨɻ ΈΜͳ͕ͲΜͳͷʹڵຯ͕༗Δͷ͔ืू͍ͨ͠ɻ HJUUFSͱHJUIVCϦϙδτϦ࡞Γ·ͨ͠ɻ  IUUQTHJUUFSJNZPTVLFGVSVLBXB5PLZP/PEF'FTUJWBM  IUUQTHJUIVCDPNZPTVLFGVSVLBXB5PLZP/PEF'FTUJWBM

ม͍͑ͨ͜ͱ ΋ͬͱελοϑҎ֎͔Βͷਓͷҙݟ΋ฉ͖͍ͨɻ ΈΜͳ͕ͲΜͳͷʹڵຯ͕༗Δͷ͔ืू͍ͨ͠ɻ HJUUFSͱHJUIVCϦϙδτϦ࡞Γ·ͨ͠ɻ  IUUQTHJUUFSJNZPTVLFGVSVLBXB5PLZP/PEF'FTUJWBM  IUUQTHJUIVCDPNZPTVLFGVSVLBXB5PLZP/PEF'FTUJWBM Θ͍Θ͍΍Γ͍ͨ

·ͱΊ

·ͱΊ /PEFKTOFXT Ϧʔμʔมߋ J[T5+'POUBJOF /PEFKTWͰมΘΔ͜ͱ ؾʹͳΔ/PEFKTϥΠϒϥϦ ,PB 1SJNVT ϑϩϯτΤϯυπʔϧ͋Γա͗
౦ژ/PEFֶԂͷࠓޙ جຊ͸ม͑ͳ͍ ҙݟΛऩू͠΍͘͢ɺ൓ө͠΍͘͢͢Δ Θ͍Θ͍Θʔ͍

ೋ୅໨ऻ໊൸࿐ޱ্

͍ͭ·Ͱ΋มΘΒ͵NodeֶԂ΁ͷޚް৘ɺ͝᩾ርΛ ۱͔Β۱·Ͱ ͣͣͣʔ͍ͱ ޤ͍ئ͍ ͋͛ͨͯ·ͭΓ·͢Δʂʂʂ

͍ͭ·Ͱ΋มΘΒ͵NodeֶԂ΁ͷޚް৘ɺ͝᩾ርΛ ۱͔Β۱·Ͱ ͣͣͣʔ͍ͱ ޤ͍ئ͍ ͋͛ͨͯ·ͭΓ·͢Δʂʂʂ ΑΖ͓͘͠ئ͍͠·͢

これからのNode.jsの話をしよう

これからのNode.jsの話をしよう

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