在package.json增加axios最新版latest的依赖并用npm install安装：

"dependencies": {
  "wx-server-sdk":"latest",
  "axios": "latest"
}

然后在index.js里输入以下代码：

const cloud = require('wx-server-sdk')
cloud.init({
  env: cloud.DYNAMIC_CURRENT_ENV,
})
const axios = require('axios')
exports.main = async (event, context) => {
  const url = "你的请求链接"
  try {
   const res = await axios.get(url)
    return res.data; 
   } catch (e) {
    console.error(e);
  }
}
当然也可以 axios.post的哈。

npm request-promise