Rodolphe BUNG
Software developer
Node.js Academy
Make a web service 👾
#ege-academy-nodejs @rbung @yagong
What is it For ?
Expose data, endpoints to trigger backend works
#ege-academy-nodejs @rbung @yagong
How ?
#ege-academy-nodejs @rbung @yagong
Why Express ? 1/2
#ege-academy-nodejs @rbung @yagong
Why Express ? 2/2
#ege-academy-nodejs @rbung @yagong
Express - Concepts
- Routing
- Middleware
- Template engine
#ege-academy-nodejs @rbung @yagong
🙅♂️
Express - Routing
#ege-academy-nodejs @rbung @yagong
Routing refers to how an application’s endpoints (URIs) respond to client requests.
app.get('/', function (req, res) {
res.send('hello world')
})Express - Middleware
#ege-academy-nodejs @rbung @yagong
Middleware functions are functions that have access to the request object (req), the response object (res), and the next function in the application’s request-response cycle.
const myLogger = function (req, res, next) {
console.log('LOGGED')
next()
}
// ... some code
app.use(myLogger)
Express - Middleware
#ege-academy-nodejs @rbung @yagong
A lot's of useful middleware !
- body-parser
- cookie-parser
- csurf
- response-time
And more : https://expressjs.com/en/resources/middleware.html
How to test ?
#ege-academy-nodejs @rbung @yagong
SuperTest - Example
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describe('GET /users', function() {
it('responds with json', function() {
return request(app)
.get('/users')
.set('Accept', 'application/json')
.expect(200)
.then(response => {
assert(response.body.email, 'foo@bar.com')
})
});
});
#ege-academy-nodejs @rbung @yagong
Node.js academy - Make a web service
By Rodolphe BUNG
