koa

Getting started with koa

Transcript

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14. ͱΓ͋͑ͣಈ͔͢
15. ͍͖ͳΓͷ)FMMP
    8PSME var koa = require('koa');! var app = koa();! ! // ͕͜͜ಛ௃తɺfunction * ͰgeneratorΛར༻ͯ͠ ͍Δɻ! app.use(function *(){! this.body = 'Hello World';! });! ! app.listen(3000);
16. LPBͷεΫϦϓτΛ࣮ߦ ͢Δͱ͖ $ node version! // v0.11.9Ҏ߱Ͱ͋Δඞཁ͕͋Δ! $ node --harmony app.js! // ͜͜ॏཁ harmony ΦϓγϣϯΛ෇͚Δඞཁ͕͋Δ! // goto http://localhost:3000/! ! $ curl http://localhost:3000/! // Hello World
17. LPBͷεΫϦϓτΛ࣮ߦ ͢Δͱ͖ $ node version! // v0.11.9Ҏ߱Ͱ͋Δඞཁ͕͋Δ! $ node --harmony app.js! // ͜͜ॏཁ harmony ΦϓγϣϯΛ෇͚Δඞཁ͕͋Δ! // goto http://localhost:3000/! ! $ curl http://localhost:3000/! // Hello World ΍ͬͨͶʂʂ
18. LPBࣗ਎ʹ͸΄ͱΜͲػೳ͸ͳ͍
 ϧʔςΟϯά΋ϨϯμϦϯάΤϯδϯ΋ͳ͍
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19. ϛυϧ΢ΣΞΛ૊Έ߹ΘͤΔ var koa = require(‘koa');! // ϧʔλʔɺ੩తϑΝΠϧ഑৴ɺϨϯμϦϯάΤϯδϯΛઃఆ! var route = require('koa-route');! var serve = require('koa-static');! var views = require('co-views');! var app = koa();! 
 // jadeΛςϯϓϨʔτΤϯδϯͱͯ͠ઃఆɻ! var render = views(__dirname + '/views', { map : {html : 'jade'}});! // GET /views => render template engine! app.use(route.get('/views', function *(next) {! // bodyʹରͯ͠index.jadeͷมߋΛ࣮ࢪɻ! this.body = yield render('index.jade', {name: "koa"});! }));! // GET /hello => 'Hello!'! app.use(route.get('/hello', function *() {! this.body = 'Hello!!';! }));! // GET /hello/:name => 'Hello :name'! app.use(route.get('/hello/:name', function *(name) {! this.body = 'Hello ' + name;! }));! // static file serve! app.use(serve(__dirname + '/public'));! ! app.listen(3000);
20. ϛυϧ΢ΣΞΛ૊Έ߹ΘͤΔ var koa = require(‘koa');! // ϧʔλʔɺ੩తϑΝΠϧ഑৴ɺϨϯμϦϯάΤϯδϯΛઃఆ! var route = require('koa-route');! var serve = require('koa-static');! var views = require('co-views');! var app = koa();! 
 // jadeΛςϯϓϨʔτΤϯδϯͱͯ͠ઃఆɻ! var render = views(__dirname + '/views', { map : {html : 'jade'}});! // GET /views => render template engine! app.use(route.get('/views', function *(next) {! // bodyʹରͯ͠index.jadeͷมߋΛ࣮ࢪɻ! this.body = yield render('index.jade', {name: "koa"});! }));! // GET /hello => 'Hello!'! app.use(route.get('/hello', function *() {! this.body = 'Hello!!';! }));! // GET /hello/:name => 'Hello :name'! app.use(route.get('/hello/:name', function *(name) {! this.body = 'Hello ' + name;! }));! // static file serve! app.use(serve(__dirname + '/public'));! ! app.listen(3000); WJFXT
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21. ϛυϧ΢ΣΞΛ૊Έ߹ΘͤΔ var koa = require(‘koa');! // ϧʔλʔɺ੩తϑΝΠϧ഑৴ɺϨϯμϦϯάΤϯδϯΛઃఆ! var route = require('koa-route');! var serve = require('koa-static');! var views = require('co-views');! var app = koa();! 
 // jadeΛςϯϓϨʔτΤϯδϯͱͯ͠ઃఆɻ! var render = views(__dirname + '/views', { map : {html : 'jade'}});! // GET /views => render template engine! app.use(route.get('/views', function *(next) {! // bodyʹରͯ͠index.jadeͷมߋΛ࣮ࢪɻ! this.body = yield render('index.jade', {name: "koa"});! }));! // GET /hello => 'Hello!'! app.use(route.get('/hello', function *() {! this.body = 'Hello!!';! }));! // GET /hello/:name => 'Hello :name'! app.use(route.get('/hello/:name', function *(name) {! this.body = 'Hello ' + name;! }));! // static file serve! app.use(serve(__dirname + '/public'));! ! app.listen(3000); ͱ͜ΖͰ͜ͷZJFMEͬͯԿ
    
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22. LPB
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23. FYQSFTTͰϛυϧ΢ΣΞΛॻ͘ // 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");! });
24. FYQSFTTͰϛυϧ΢ΣΞΛॻ͘ // 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");! }); OFYUؔ਺Ͱ࣍ͷϛυϧ΢ΣΞ Λݺͼग़͢ SFR
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25. LPBͰϛυϧ΢ΣΞΛॻ͘ // 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';! });
26. LPBͰϛυϧ΢ΣΞΛॻ͘ // 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';! }); GVODUJPO
    
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27. HFOFSBUPSZJFME // 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';! }); IFBEFSΠϕϯτͷड৴͸ෆཁɻ
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29. // 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';! }); // 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");! }); FYQSFTT
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30. FYQSFTTͰΤϥʔॲཧ // Express! // error thrower! app.use(function(req, res, next){! if (req.url === "/_err") {! next(new Error("abc"));! }! }); ! ! // handle error! app.use(function(err, req, res, next){! if (err) {! console.error(err.stack);! res.send(500, err.message);! }! });
31. FYQSFTTͰΤϥʔॲཧ // Express! // error thrower! app.use(function(req, res, next){! if (req.url === "/_err") {! next(new Error("abc"));! }! }); ! ! // handle error! app.use(function(err, req, res, next){! if (err) {! console.error(err.stack);! res.send(500, err.message);! }! }); FSS
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32. LPBͰΤϥʔॲཧ // handle error! app.use(function *(next) {! try {! yield next;! } catch (err) {! console.error(err.stack);! this.status = 500;! this.body = err.message;! }! });! ! // error thrower! app.use(function *(next) {! if (this.url === "/_err") {! throw new Error("Send Error");! }! yield next;! });
33. LPBͰΤϥʔॲཧ // handle error! app.use(function *(next) {! try {! yield next;! } catch (err) {! console.error(err.stack);! this.status = 500;! this.body = err.message;! }! });! ! // error thrower! app.use(function *(next) {! if (this.url === "/_err") {! throw new Error("Send Error");! }! yield next;! }); USZ
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    LPB // Express! ! // error thrower! app.use(function(req, res, next) {! if (req.url === "/_err") {! next(new Error("abc"));! }! });! ! // handle error! app.use(function(err, req, res, next){! if (err) {! console.error(err.stack);! res.send(500, err.message);! }! }); // koa! ! // handle error! app.use(function *(next) {! try {! yield next;! } catch (err) {! console.error(err.stack);! this.status = 500;! this.body = err.message;! }! });! ! // error thrower! app.use(function *(next) {! if (this.url === "/_err") {! throw new Error("Send Error");! }! yield next;! });
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