用axios连接aplCloud里的数据库，并用koa和前端进行数据交互

后台

const koaBody = require('koa-body')  //使得可以通过ctx.request.body获取用户传给后台的值
var cors = require('koa-cors'); //解决跨域问题

const sha1 = require('sha1') //连接apiCloud数据库所必须的模块
const axios = require('axios')

const Koa = require('koa')
const Router = require('koa-router')

const app = new Koa()
app.use(cors())

const db = {
    appId: 'A6080003742490',
    appKey: '3122A704-87DA-D8FE-ADB7-32F13576097B'
}

const request = axios.create({
    baseURL: 'https://d.apicloud.com/mcm/api'
})

const apiRouter = new Router({ prefix: '/api' })
const userRouter = new Router({ prefix: '/user' })

const getHeaders = () => {
    const now = Date.now()
    return {
      'X-APICloud-AppId': db.appId,
      'X-APICloud-AppKey': `${sha1(`${db.appId}UZ${db.appKey}UZ${now}`)}.${now}`
    }
}

userRouter.post('/todo', async (ctx) => {
  const todo = ctx.request.body
  const result = await request.post(
    'todo',
    todo,
    { headers: getHeaders() }
  )
  ctx.body = todo
})

apiRouter
.get('/todos', async (ctx) => {
  const todos = await request.get('todo', {
    headers: getHeaders()
  })   //这里必须用异步操作
  ctx.body = todos.data
})

app.use(koaBody())
app.use(userRouter.routes()).use(userRouter.allowedMethods())
app.use(apiRouter.routes()).use(apiRouter.allowedMethods())

app.listen(3333, function() {
    console.log('server now listening at port 3333');
});

前端

function getFun() {
    $.ajax({
        url: 'http://localhost:3333/api/todos',
        type: 'get', 
        success: function (data) {
            console.log("get结果", data);         
        },
        error: function (error) {
            console.log('Error: ' + error);
        }
    });
}

function postFun() {
    $.ajax({
        url: 'http://localhost:3333/user/todo',
        type: 'post',
        data:{
            content:"999999999999999999",
            completed:true
        },
        success: function (data) {
            console.log("post结果", data); 
        },
        error: function (error) {
            console.log('Error: ' + error);
        },
    });
}