express配置跨域

app.all(‘*‘, (req, res, next) => {
  // google需要配置，否则报错cors error
  res.setHeader(‘Access-Control-Allow-Credentials‘, ‘true‘)
  // 允许的地址,http://127.0.0.1:9000这样的格式
  res.setHeader(‘Access-Control-Allow-Origin‘, req.get(‘Origin‘))
  // 允许跨域请求的方法
  res.setHeader(
    ‘Access-Control-Allow-Methods‘,
    ‘POST, GET, OPTIONS, DELETE, PUT‘
  )
  next()
})

const express = require(‘express‘)
const app = express()
const port = 9000

app.all(‘*‘, (req, res, next) => {
  // google需要配置，否则报错cors error
  res.setHeader(‘Access-Control-Allow-Credentials‘, ‘true‘)
  // 允许的地址,http://127.0.0.1:9000这样的格式
  res.setHeader(‘Access-Control-Allow-Origin‘, req.get(‘Origin‘))
  // 允许跨域请求的方法
  res.setHeader(
    ‘Access-Control-Allow-Methods‘,
    ‘POST, GET, OPTIONS, DELETE, PUT‘
  )
  next()
})

app.get(‘/‘, (req, res) => {
  res.send(‘Hello World!‘)
})

app.get(‘/mall/queryMall‘, (req, res) => {
  res.send({
    code: 0,
    sum_num: 2,
    data: [
      {
        id: 1,
        name: ‘商场一号‘,
        proportion: 10,
        address: ‘上海市,辖区,浦东新区‘,
        user: {
          id: 1,
          name: ‘zezhou一号‘,
          tc: ‘商品金额*一级提率‘,
        },
      },
      {
        id: 2,
        name: ‘商场二号‘,
        proportion: 5,
        address: ‘上海市,辖区,浦东新区‘,
        user: {
          id: 2,
          name: ‘zezhou二号‘,
          tc: ‘商品金额*一级提率‘,
        },
      },
    ],
  })
})

app.listen(port, () => {
  console.log(`Example app listening at http://localhost:${port}`)
})