RESTful API設計的簡單例子

代碼承接簡單服務器，修改 app.js

const koa = require('koa'),
    app = new koa(),
    Router = require('koa-router'),
    router = new Router(),
    host = '127.0.0.1',
    port = 12899,
    jsonwebtoken = require('jsonwebtoken'),
    jwt = require('koa-jwt');

router 
    .post('/users/', (ctx, next) => {
        ctx.body = 'add users';
    })
    .del('/users/:id', (ctx, next) => {
        ctx.body = 'remove users';
    })
    .put('/users/:id', (ctx, next) => {
        ctx.body = 'modify users';
    })
    .get('/users/:id', (ctx, next) => {
        ctx.body = 'retrieve users';
    });


app.use(router.routes());

app.listen(port, host, function () {
    console.log(`server is running in http://${host}:${port}`);
});

 

使用一些其餘性質，修改 app.js

const koa = require('koa'),
    app = new koa(),
    Router = require('koa-router'),
    router = new Router({
        prefix : '/user'
    }),
    host = '127.0.0.1',
    port = 12899,
    jsonwebtoken = require('jsonwebtoken'),
    jwt = require('koa-jwt');

// 那個路由在前面就先匹配那個路由
router
    .get('/:id/:level', async (ctx, next) => {
        ctx.body = `get start: ${ctx.params.id}--${ctx.params.level}==>`;
        await next(); //必須加這個才匹配 all
    }, async (ctx, next) => {//中間件
        ctx.body += ' second mid';
        await next();
    })
    .all('/', (ctx, next) => {
        ctx.body += ' all info';
        // 設置跨域請求，跨域資源共享CORS（*指所有）
        ctx.set('Access-Control-Allow-Origin', '*');
    });


app.use(router.routes());

app.listen(port, host, function () {
    console.log(`server is running in http://${host}:${port}`);
});