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これからのNode.jsの話をしよう
Yosuke Furukawa
PRO
February 26, 2014
Programming
16
7.1k
これからのNode.jsの話をしよう
Yosuke Furukawa
PRO
February 26, 2014
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Transcript
͜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
/PEFKTOFXT Ϧʔμʔ͕*[BBDT͔Β 5+'POUBJOFʹ
5+'POUBJOF͜Μͳਓɹ ʹDPSFUFBNʹKPJO $*UFTUϝΠϯʹ୲ 8BMNBSUͷϝϞϦϦʔΫΛൃݟ ͨ͠ΓͱϨΠϠʔʹڧ͍
5+'POUBJOF͜Μͳਓɹ ʹDPSFUFBNʹKPJO $*UFTUϝΠϯʹ୲ 8BMNBSUͷϝϞϦϦʔΫΛൃݟ ͨ͠ΓͱϨΠϠʔʹڧ͍ ౦ژ/PEFֶԂࡇ ʹݺͼ͍ͨ
/PEFKTOFXT
/PEFKTOFXT W͏͙͢Ͱ͢Ͷ
WͰ৽͘͠ͳΔ͜ͱ 4USFBN DMVTUFSSPVOESPCJO NVMUJQMFDPOUFYUJOWN TZODDIJME@QSPDFTT USBDJOHBQJ QFSGPSNBODFJNQSPWFNFOU FUD
WͰ৽͘͠ͳΔ͜ͱ 4USFBN DMVTUFSSPVOESPCJO NVMUJQMFDPOUFYUJOWN TZODDIJME@QSPDFTT USBDJOHBQJ QFSGPSNBODFJNQSPWFNFOU FUD ೦ͳ͕ΒWͰ&4σϑΥϧτʹͳΒͳ͍
WͰ৽͘͠ͳΔ͜ͱ ٞͷྲྀΕΛϒϩάʹհͯ͠ΔͷͰ͕࣌ؒ͋Εݟ ͍ͯͩ͘͞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 UJDLຖʹVTFSͷҙͷΦϒδΣΫτΛUSBDFͰ͖ Δ
USBDJOH"1* %&.0
Wͷશػೳհ͠ ͖Εͳ͍
Wͷશػೳհ͠ ͖Εͳ͍ 4USPOH-PPQ͕͔ͳΓ հͯ͠ΔͷͰݟΑ͏ /PEFֶԂࡇʹ4USPOH-PPQͷਓ ݺΜͰ͍͍͔
ؾʹͳΔϥΠϒϥϦ
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;! });! ΤϥʔϋϯυϦϯάײత
ৄ͘͠
ৄ͘͠ ͷॻ͍ͨLPBೖهࣄΛ͝ҰಡԼ͍͞ɻ
ؾʹͳΔϥΠϒϥϦ SFBMUJNFฤ
ؾʹͳΔϥΠϒϥϦ SFBMUJNFฤ 4PDLFU*0 ৽͍͠1FSMͰ͋Δɻ
SFBMUJNFϥΠϒϥϦ ࣮ͨ͘͞Μ͋Δ
SFBMUJNFϥΠϒϥϦ ࣮ͨ͘͞Μ͋Δ TPDLFUJPʹ͚ͩ नΘΕΔඞཁͳ͍ɻ
ͰͲΕ͏ͷ
1SJNVT
1SJNVT ͦ͜Ͱɺ1SJNVTɻ USBOTGFSͰFOHJOFJP GBZF TPDLKT CSPXTFSDIBOOFM XT͕ ͑Δɺͦͷ্ͰTPDLFUJPͰαϙʔτ͍ͯ͠ΔΑ͏ͳ SPPNͱ͔ͷΞϓϦέʔγϣϯΛߏங͢Δ
1SJNVT ͦ͜Ͱɺ1SJNVTɻ USBOTGFSͰFOHJOFJP GBZF TPDLKT CSPXTFSDIBOOFM͕ ͑Δɺͦͷ্ͰTPDLFUJPͰαϙʔτ͍ͯ͠ΔΑ͏ͳ SPPNͱ͔ͷΞϓϦέʔγϣϯΛߏங͢Δ ΜͰͳ͍Ͱ1SJNVT͓͏ɺ ޙͰUSBOTGFSม͑ΒΕΔɻ
ؾʹͳΔϥΠϒϥϦ ϑϩϯτΤϯυπʔϧฤ
ؾʹͳΔϥΠϒϥϦ ϑϩϯτΤϯυฤ ඦՖ៶ཚ͗ͯ͢ɺઆ໌ׂѪɻ
ؾʹͳΔϥΠϒϥϦ ϑϩϯτΤϯυπʔϧฤ ݸਓతʹHVMQ CSPXTFSJGZ DPNQPOFOUJP
͜ͷޙCSPXTFSJGZͷ ͋Γ·͢ʂʂɹ
౦ژ/PEFֶԂͷࠓޙ
جຊํ ೋ݄ʹҰ/PEFֶԂΛ։࠵ͯ͠ɺΈΜͳͷ ݟΛूΊ͍ͨ ʹҰɺ౦ژ/PEFֶԂࡇ։࠵͍ͨ͠ /PEFKTͷ͔Γ͡Όͳͯ͘ผͳݴޠ͔Βֶ ΜͩΓɺ৽͍͠ࣄͲΜͲΜٵऩ͍ͨ͠
جຊํ ೋ݄ʹҰ/PEFֶԂΛ։࠵ͯ͠ɺΈΜͳͷ ݟΛूΊ͍ͨ ʹҰɺ౦ژ/PEFֶԂࡇ։࠵͍ͨ͠ /PEFKTͷ͔Γ͡Όͳͯ͘ผͳݴޠ͔Βֶ ΜͩΓɺ৽͍͠ࣄͲΜͲΜٵऩ͍ͨ͠ ͭ·Γ͜Ε·Ͱ௨Γ /PEFֶԂΛΓ͍ͨ
ม͍͑ͨ͜ͱ ͬͱελοϑҎ֎͔Βͷਓͷҙݟฉ͖͍ͨɻ ΈΜͳ͕ͲΜͳͷʹڵຯ͕༗Δͷ͔ืू͍ͨ͠ɻ HJUUFSͱHJUIVCϦϙδτϦ࡞Γ·ͨ͠ɻ IUUQTHJUUFSJNZPTVLFGVSVLBXB5PLZP/PEF'FTUJWBM IUUQTHJUIVCDPNZPTVLFGVSVLBXB5PLZP/PEF'FTUJWBM
ม͍͑ͨ͜ͱ ͬͱελοϑҎ֎͔Βͷਓͷҙݟฉ͖͍ͨɻ ΈΜͳ͕ͲΜͳͷʹڵຯ͕༗Δͷ͔ืू͍ͨ͠ɻ HJUUFSͱHJUIVCϦϙδτϦ࡞Γ·ͨ͠ɻ IUUQTHJUUFSJNZPTVLFGVSVLBXB5PLZP/PEF'FTUJWBM IUUQTHJUIVCDPNZPTVLFGVSVLBXB5PLZP/PEF'FTUJWBM Θ͍Θ͍Γ͍ͨ
·ͱΊ
·ͱΊ /PEFKTOFXT Ϧʔμʔมߋ J[T5+'POUBJOF /PEFKTWͰมΘΔ͜ͱ ؾʹͳΔ/PEFKTϥΠϒϥϦ ,PB 1SJNVT ϑϩϯτΤϯυπʔϧ͋Γա͗
౦ژ/PEFֶԂͷࠓޙ جຊม͑ͳ͍ ҙݟΛऩू͘͢͠ɺө͘͢͢͠Δ Θ͍Θ͍Θʔ͍
ೋऻ໊൸࿐ޱ্
͍ͭ·ͰมΘΒ͵NodeֶԂͷޚްɺ͝ርΛ ۱͔Β۱·Ͱ ͣͣͣʔ͍ͱ ޤ͍ئ͍ ͋͛ͨͯ·ͭΓ·͢Δʂʂʂ
͍ͭ·ͰมΘΒ͵NodeֶԂͷޚްɺ͝ርΛ ۱͔Β۱·Ͱ ͣͣͣʔ͍ͱ ޤ͍ئ͍ ͋͛ͨͯ·ͭΓ·͢Δʂʂʂ ΑΖ͓͘͠ئ͍͠·͢