RESTful API设计的简单例子

代码承接简单服务器，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}`);
});

使用一些其他性质，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');

// 那个路由在前面就先匹配那个路由
router
    .get('/:id/:level', async (ctx, next) => {
        ctx.body = `get start: ${ctx.params.id}--${ctx.params.level}==>`;
        await next(); //必须加这个才匹配 all
    }, async (ctx, next) => {//中间件
        ctx.body += ' second mid';
        await next();
    })
    .all('/', (ctx, next) => {
        ctx.body += ' all info';
        // 设置跨域请求，跨域资源共享CORS（*指全部）
        ctx.set('Access-Control-Allow-Origin', '*');
    });

app.use(router.routes());

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