Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Fast Web Development with Express
Search
Tommy Chen
November 06, 2014
Programming
0
67
Fast Web Development with Express
Tommy Chen
November 06, 2014
Tweet
Share
More Decks by Tommy Chen
See All by Tommy Chen
Kosko - 改用 JavaScript 來管理 Kubernetes YAML (Kubernetes Summit 2021)
tommy351
1
1.3k
Kosko - 改用 JavaScript 來管理 Kubernetes YAML (COSCUP 2021)
tommy351
0
79
Kubernetes 101
tommy351
2
250
Socket.io 即時通訊實作
tommy351
0
81
An Introduction to Node.js
tommy351
1
280
Other Decks in Programming
See All in Programming
最新TCAキャッチアップ
0si43
0
200
Vapor Revolution
kazupon
1
160
Kaigi on Rails 2024 〜運営の裏側〜
krpk1900
1
250
Macとオーディオ再生 2024/11/02
yusukeito
0
380
Hotwire or React? ~アフタートーク・本編に含めなかった話~ / Hotwire or React? after talk
harunatsujita
1
120
ふかぼれ!CSSセレクターモジュール / Fukabore! CSS Selectors Module
petamoriken
0
150
リアーキテクチャxDDD 1年間の取り組みと進化
hsawaji
1
220
Amazon Qを使ってIaCを触ろう!
maruto
0
420
A Journey of Contribution and Collaboration in Open Source
ivargrimstad
0
1k
CSC509 Lecture 09
javiergs
PRO
0
140
RubyLSPのマルチバイト文字対応
notfounds
0
120
Why Jakarta EE Matters to Spring - and Vice Versa
ivargrimstad
0
1.2k
Featured
See All Featured
Faster Mobile Websites
deanohume
305
30k
5 minutes of I Can Smell Your CMS
philhawksworth
202
19k
A better future with KSS
kneath
238
17k
Side Projects
sachag
452
42k
Scaling GitHub
holman
458
140k
Facilitating Awesome Meetings
lara
50
6.1k
The Invisible Side of Design
smashingmag
298
50k
For a Future-Friendly Web
brad_frost
175
9.4k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
229
52k
[RailsConf 2023] Rails as a piece of cake
palkan
52
4.9k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
47
5k
Thoughts on Productivity
jonyablonski
67
4.3k
Transcript
Fast Web Development with Express 陳嘉輝 @tommy351 1
安裝 npm install express --save 2
Hello World var express = require('express'); var app = express();
app.get('/', function(req, res){ res.send('Hello world'); }); app.listen(4000, function(){ console.log('Server started!'); }); 3
4 ⽅方法 app.VERB('/users/:id', function(req, res, next){}); use:Middleware get:取得資料 post:建⽴立資料 put:取代資料
patch:更新資料 delete:刪除資料
5 路徑 app.VERB('/users/:id', function(req, res, next){}); :id:冒號開頭視為參數 :id?:結尾加上 ”?” 代表選填參數
6 Handler app.VERB('/users/:id', function(req, res, next){}); req:請求 res:回應 next:進⼊入下⼀一個 Handler
Middleware • 所有路徑符合的函數都會依序執⾏行 • 直到 next 函數被呼叫之前,下⼀一個函數不會被執⾏行 • 如果 next
函數帶有參數時,則會跳出錯誤 7
8 / /users/:id /users/:id http://localhost:4000/ 回應 x x 404 Not
Found
9 / /users/:id http://localhost:4000/users/tommy x 回應 /users/:id 䎛↡袂㽳竑完⫘嬭獑 404 Not
Found
10 / /users/:id /users/:id next() http://localhost:4000/users/tommy 回應 x ㊦櫩❝⛌PGZV
㔮㧤蒢⑆⃬⃡⋬JCPFNGT 404 Not Found
EJS app.set('views', __dirname + '/views'); app.set('view engine', 'html'); app.engine('html', require('ejs').renderFile);
• EJS 是⼀一種 JavaScript 模版引擎 • 安裝:npm install ejs --save 11
模版 app.get('/users/:id', function(req, res, next){ res.render('users/show', {user: req.user}); }); 12
My name is <%= user.name %> and I am <%= user.age %> years old. My name is Jack and I am 25 years old.
模版 - 陣列 13 My name is <%= user.name %>
and I am <%= user.age %> years old. Here's my wishlist: <ul> <% user.wishlist.forEach(function(item){ %> <li><%= item %></li> <% }) %> </ul> My name is Jack and I am 25 years old. Here's my wish list: • iPhone 6 • Car
Query string 14 http://localhost:4000/users/1?a=b&c=d • ? 後⾯面的字串即為 Query string •
每個參數以 & 分隔 • key 和 value 以 = 分隔 • 在 Express 中使⽤用 req.query 讀取 Query string app.get('/', function(req, res){ console.log(req.query); });
Body • Body 是 HTTP 請求的內容 • 使⽤用 body-parser 解析表單內容:npm
install body-parser --save 15 app.use(require('body-parser').urlencoded({ extended: true }));
實作 留⾔言板 16
Thanks 17