腾讯云函数serverless笔记

一、腾讯云serverless搭建Mysql数据库访问接口

/**************************************************
Node8.9-Mysql
Reference: mysql api---https://www.npmjs.com/package/mysql
Reference: How to access database---https://cloud.tencent.com/document/product/236/3130
Reference: How to connect api gateway with scf---https://cloud.tencent.com/document/product/628/11983
***************************************************/

function wrapPromise(connection, sql) {
     
  return new Promise((res, rej) => {
     
    connection.query(sql, function(error, results, fields) {
     
      if (error) {
     
        rej(error)
      }
      res(results)
    })
  })
}


exports.main_handler = async (event, context, callback) => {
     
  const mysql = require('mysql');
  const connection = mysql.createConnection({
     
    host: '***', // The ip address of cloud database instance, 云数据库实例ip地址
    port: 3306,
    user: '***', // The name of cloud database, for example, root, 云数据库用户名，如root
    password: '***', // Password of cloud database, 云数据库密码
    database: 'test' // Name of the cloud database, 数据库名称
  });

  connection.connect();
  // get value from apigw 
  let testreturn = event.queryString["CustomerID"] + " " + event.queryString["CustomerName"]

  // const updateSql = `UPDATE Customers SET CustomerName = '${CustomerName}' WHERE CustomerID = ${CustomerID}`
  const querySql = `SELECT * from user`

  // await wrapPromise(connection, updateSql)

  let queryResult = await wrapPromise(connection, querySql)  
  connection.end();
  console.log(queryResult)
  return queryResult
  // return {resul : testreturn}
}

获取url传值：

let testreturn = event.queryString["CustomerID"] + " " + event.queryString["CustomerName"]

二、腾讯云函数搭建nodejs服务器

（一）、首先从模板库中拉取一个express模板

（二）、编辑代码

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-gO9veqfz-1617372200403)(C:\Users\Administrator\AppData\Roaming\Typora\typora-user-images\image-20210402210340678.png)]

（三）、根据需要安装模块

npm install mysql --save

（四）、触发管理

直接复制进浏览器即可访问，也可根据路由进行跳转到对应的网页