1. npm install express cors
// 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: "Vlad", age: "18"},
{ id: 2, name: "David", age: "18"},
{ id: 3, name: "Erik", age: "17"}
]
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])
})
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)
req.status(201)
.lovation('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`)
})
alla laadida “Postman”
в терминале пишим “node index.js”
vajutage nuppu “New HTTP Request”
nüüd on meil aken, me kirjutame sinna: http://localhost:8080/widgets, seejärel vajutage nuppu “Send” mille järel saame koodis kirjutatud andmed
lisamiseks kasutame “Post”, “raw”, “JSON” siis kirjutame soovitud nime ja vanuse, edasi “Send”
{
"age": 25,
"name": "David.L"
}
eemaldamiseks kasutame “DELETE” ja pärast kirjutab mida me tahame kustuta http://localhost:8080/widgets/kirjuta siin
Kokkuvõtte
Ma tegin GET, POST, DELETE
Oli huvitav näha, kuidas seda kasutada saab: Postman