Node(九)之Node配合MongoDB实现简单的注册登录

附上代码:(较之前的用txt实现的没有什么区别,只是后端用数据库实现了接口功能)

Html:

<!DOCTYPE html>
<html lang="en">

  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
    <script src="./jquery.js"></script>
    <style>
      * {
        margin: 0;
        padding: 0;
      }
      div:nth-child(2) {
        display: none;
      }
      input {
        display: block;
        height: 40px;
        width: 200px;
        margin: 20px auto;
      }
      button:not(#email) {
        display: block;
        height: 30px;
        width: 70px;
        background: lightcoral;
        border: none;
        margin: 0 auto;
      }
      #email {
        display: block;
        height: 30px;
        width: 100px;
        margin: 0 auto;
      }
      ul {
        height: 50px;
        width: 200px;
        background: lightblue;
        margin: 0 auto;
        list-style: none;
      }
      li {
        height: 50px;
        width: 100px;
        float: left;
        text-align: center;
        line-height: 50px;
      }
      li:hover {
        background: lightgreen;
        cursor: pointer;
      }
    </style>
  </head>

  <body>
    <ul>
      <li id="regChange">注册</li>
      <li id="loginChange">登录</li>
    </ul>
    <div id="reg">
      <input type="text" placeholder="邮箱" id="user" />
      <input type="text" placeholder="密码" id="psd" />
      <input type="text" placeholder="验证码" id="sendmail" />
      <button id="email">发送验证码</button> <button id="btn">注册</button>
    </div>
    <div id="login">
      <input type="text" placeholder="用户名" id="loguser" />
      <input type="text" placeholder="密码" id="logpsd" />
      <button id="logbtn">登录</button>
    </div>

    <script>
      //增加监听事件
      btn.addEventListener("click", clickHandler);
      logbtn.addEventListener("click", clickHandler);
      email.addEventListener("click", sendHandler);
      regChange.addEventListener("click", changeHandler);
      loginChange.addEventListener("click", changeHandler);

      function clickHandler(e) {
        if (this.textContent === "注册") {
          //若为空时跳出
          if (!user.value || !psd.value || !sendmail.value) {
            alert("Can't be empty");
            return;
          }
          //点击注册时将邮箱号,密码,验证码传送至后台
          $.get(
            `http://localhost:1024/index/reg?user=${user.value}&psd=${
              psd.value
            }&mail=${sendmail.value}`,
            function (res) {
              //后台返回的对象,若hasUser为真,说明已有用户名,否则注册成功
              if (res.hasUser) {
                alert("注册失败");
                return;
              } else {
                alert("注册成功~");
              }
              //成功后隐藏注册,显示登录
              reg.style.display = "none";
              login.style.display = "block";
            }
          );
        } else if (this.textContent === "登录") {
          // 同注册,不能为空
          if (!loguser.value || !logpsd.value) {
            alert("Can't be empty");
            return;
          }
          //点击注册时将邮箱号,密码传送至后台
          $.get(
            `http://localhost:1024/index/login?user=${loguser.value}&psd=${
              logpsd.value
            }`,
            function (res) {
              //后台返回的对象,若isUser为真,说明正确,并跳转至欢迎页,否则失败
              if (res.isUser) {
                alert("登录成功");
                location.href = "./welcome.html";
              } else {
                alert("用户名或密码不正确");
                return;
              }
            }
          );
        }
      }

      function sendHandler(e) {
        //   点击获取验证码后将验证码发送到后端进行比对
        $.get(`http://localhost:1024/index/sendmail?${user.value}`);
      }

      function changeHandler(e) {
        //   点击上方的注册登录切换
        if (e.target.textContent === "注册") {
          reg.style.display = "block";
          login.style.display = "none";
        } else {
          reg.style.display = "none";
          login.style.display = "block";
        }
      }
    </script>
  </body>

</html>

JS部分:同样要用到express框架,cors,nodemailer,并且不需要File System,Path模块

var MongoClient = require("mongodb").MongoClient;//mongoDb模块引入
var mongoDB = "mongodb://localhost:27017/";//初始化地址
const express = require("express"); //引入express框架(需要先下载,官网有教程)
const url = require("url");
const cors = require("cors"); //引入cors模块(解决跨域问题)
const app = express();
const sendMail = require("./send"); //这个模块是发送邮件模块(在我第三篇node文章里有)

app.use(cors());
// 下面的类似于http请求的头文件(另一篇文章有写到http请求,也是注册登录)
app.all("*", function(req, res, next) {
  //设置允许跨域的域名,*代表允许任意域名跨域
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "content-type"); //允许的header类型
  res.header("Access-Control-Allow-Methods", "DELETE,PUT,POST,GET,OPTIONS"); //跨域允许的请求方式
  next(); //是否继续向下执行
});

//注册接口
var count = ""; //新建一个空字符存放验证码,可供全局调用
app.get("/index/reg", (req, res) => {
  let search = url
    .parse(req.url)
    .query.split("&")[0]
    .split("=")[1]; //保存前端传来的数据
  let query = url.parse(req.url).query.split("&");
  MongoClient.connect(//连接数据库
    mongoDB,
    {
      useNewUrlParser: true
    },
    function(err, db) {
      if (err) {
        throw err;
      }
      console.log("连接成功!");
      var dball = db.db("UserList");
      // 查询邮箱
      dball
        .collection("allUser")
        .find({
          email: search
        })
        .toArray(function(err, result) {
          if (err) {
            console.log(err);
            return;
          }

          function test() {//应用promise执行,若找到该用户,返回正确,反之返回错误
            return new Promise((resolve, reject) => {//若用户邮箱不存在并且验证码正确,则抛出正确,否则抛出错误对象
              if (!result.length && query[2].split("=")[1] === count) {
                resolve({
                  hasUser: false
                });
                //找到后将数据存储至数据库
                dball.collection("allUser").insert(
                  [
                    {
                      email: query[0].split("=")[1],
                      password: query[1].split("=")[1]
                    }
                  ],
                  function(err, result) {
                    if (err) {
                      console.log("Error:" + err);
                      return;
                    }
                  }
                );
              } else {//反之抛出错误对象至前端
                reject({
                  hasUser: true
                });
              }
            });
          }
          test()
            .then(data => {
              console.log(data);
              res.send(data);
            })
            .catch(err => {
              console.log(err);
              res.send(err);
            });
        });
    }
  );
});

//登录接口
app.get("/index/login", (req, res) => {
  //保存前端传来的数据
  let query = url.parse(req.url).query.split("&");
  MongoClient.connect(
    mongoDB,
    {
      useNewUrlParser: true
    },
    function(err, db) {
      if (err) {
        throw err;
      }
      console.log("连接成功!");
      var dball = db.db("UserList");
      // 查询是否有该用户
      dball
        .collection("allUser")
        .find({
          email: query[0].split("=")[1]
        })
        .toArray(function(err, result) {
          if (err) {
            console.log(err);
            return;
          }
          function test() {//若用户邮箱和密码符合,则抛出正确,否则抛出错误对象
            return new Promise((resolve, reject) => {
              if (
                result.length &&
                result[0].password === query[1].split("=")[1]
              ) {
                resolve({
                  isUser: true
                });
              } else {
                reject({
                  isUser: false
                });
              }
            });
          }
          test()
            .then(data => {
              console.log(data);
              res.send(data);
            })
            .catch(err => {
              console.log(err);
              res.send(err);
            });
        });
    }
  );
});

//邮箱验证接口
app.get("/index/sendmail", (req, res) => {
  count = ""; //初始化验证码容器
  let Email = url.parse(req.url).query; //获取前端传来的邮箱号
  for (let i = 0; i < 4; i++) {
    count += Math.floor(Math.random() * 10); //生成4个随机数
  }
  sendMail.send(Email, count); //调用邮件发送模块
  res.send(count);
});
//监听服务
app.listen(1024, () => {
  console.log("Server Start~");
});

邮箱的js文件(send.js)

const nodemailer = require("nodemailer");
let obj = {
  transporter: nodemailer.createTransport({
    service: "qq", // 运营商  qq邮箱 网易//
    port: 465,
    secure: true,
    auth: {
      user: "*********@qq.com", //发送方的邮箱
      pass: "*******" // pop3 授权码
    }
  }),
  send: function(mail, content) {
    mailOptions = {
      from: '"Hello World~" <**********@qq.com>',
      to: mail,
      subject: content,
      text: content,
      html: "<h1>" + content + "</h1>"
    };
    this.transporter.sendMail(mailOptions, (error, info) => {
      if (error) {
        return console.log(error);
      }
      console.log("Message sent: %s", info.messageId);
    });
  }
};
module.exports = obj;

 

posted @ 2018-12-01 16:47  阿宇的编程之旅  阅读(313)  评论(0编辑  收藏  举报