Ülesande eesmärk: Õppida looma lihtsat REST API-d, kasutades Node.js ja Express.js raamistikku.
Loome kausta REST API ja avame terminali.
- Loome projekti node.js abil.
Paigutame sinna koodi: npm install express cors
Avame Visual Studio Code’is kausta rest-api ja loome faili index.js.
Kirjutame selle koodi index.js-i
//Kasutame moduleid
const express = require('express');
const cors = require('cors');
//Loome leht
const app = express();
app.use(cors());
app.use(express.json())
//Loome widget´eid
const widgets = [
{ id: 1, name: "Daria", age: "18"},
{ id: 2, name: "Valeria", age: "18"},
{ id: 3, name: "Sofiia", age: "20"}
]
app.get('/widgets', (req, res) => {
res.send(widgets)
})
app.get('/widgets/:id', (req, res) => {
if (typeof widgets[req.params.id - 1] === 'undefined') {
return res.status(404).send({ error: "Widget not found" })
}
res.send(widgets[req.params.id - 1])
})
// Lisamine
app.post('/widgets', (req, res) => {
if (!req.body.name || !req.body.age) {
return res.status(400).send({ error: 'One or all params are missing' })
}
let newWidget = {
id: widgets.length + 1,
name: req.body.name,
age: req.body.age
}
widgets.push(newWidget)
res.status(201)
.location('localhost:8080/widgets/' + (widgets.length - 1))
.send(newWidget)
})
// Kustutamine
app.delete('/widgets/:id', (req, res) => {
if (typeof widgets[req.params.id - 1] === 'undefined') {
return res.status(404).send({ error: "Widget not found" })
}
widgets.splice(req.params.id - 1, 1)
res.status(204).send()
})
app.listen(8080, () => {
console.log(`API up at: http://localhost:8080`)
})
Leidke extensions marketplace’ist postman ja installige see.
Registreeruda veebisaidil postman
Loome terminali ja kirjutame sinna: node index.js
Sisestame API: http://localhost:8080/widgets
Kokkuvõte:
Kõik kasatatud päringud töötavad (GET, POST, DELETE)