nodejs/express.createserver不是一个函数

Question

我是Node.js的新手，我正在尝试使用NodeMailer发送电子邮件，并且我当前在控制台上遇到类型错误。

//错误//[0] TypeError：Express.Createserver不是功能[0]在app.post(/Users/thomashunt/desktop/react_express_starter/server.js:33:17([0]在layer.handle [as hander_request](/users/thomashunt/desktop/react_express_starter/node_modules/express/lib/lib/router/layer.js:95:5:5([0]在下一步(/users/thomashunt/desktop/react_express_starter/node_modules/express/lib/router/route.js:137:13([0]在rout.dispatch(/Users/thomashunt/desktop/react_express_starter/node_modules/express/lib/router/router/route.js:112:3([0]在layer.handle [as hander_request](/users/thomashunt/desktop/react_express_starter/node_modules/express/lib/lib/router/layer.js:95:5:5([0] at/users/thomashunt/desktop/react_express_starter/node_modules/express/lib/router/router/index.js:281:22[0]在function.process_params(/Users/thomashunt/desktop/react_express_starter/node_modules/express/lib/lib/router/router/index.js:335:12(([0]在下一步(/users/thomashunt/desktop/react_express_starter/node_modules/express/lib/router/router/index.js:275:10([0]在urlencodedparser(/users/thomashunt/desktop/react_express_starter/node_modules/body-parser/lib-parser/lib/types/urlencoded.js:82:82:7([0]在layer.handle [as hander_request](/users/thomashunt/desktop/react_express_starter/node_modules/express/lib/lib/router/layer.js:95:5:5:5:5:5(

//错误结束

这是我的server.js文件的代码：

const nodemailer = require('nodemailer')
const path = require('path')
const express = require('express')
const app = express()
const port = 5000
const cors = require('cors')
app.use(cors())
const bodyParser = require('body-parser')
app.use(bodyParser.json())
// to support JSON-encoded bodies
app.use(
  bodyParser.urlencoded({
    // to support URL-encoded bodies
    extended: true
  })
)
app.get('/home', (req, res) => {
  console.log(
    'Hello from .get /home',
    req.body.generalDetails,
    req.body.firstName,
    req.body.mName
  )
})
app.post('/home', (req, res) => {

  var express = require('express'),
  nodemailer = require("nodemailer");
  app = express.createServer();
  app.use(express.bodyParser());
  app.post('/formProcess', function (req, res) {
      var data=req.body;
      var smtpTransport = nodemailer.createTransport("SMTP",{
         service: "Gmail",
         auth: {
         user: "[e-mail]",
         pass: "pass"
         }});
     smtpTransport.sendMail({  //email options
     from: "email",
     to: "[e-mail]", // receiver
     subject: "Emailing with nodemailer", // subject
     text:req.body.generalDetails,
     html: "here your data goes"// body (var data which we've declared)
      }, function(error, response){  //callback
           if(error){
             console.log(error);
          }else{
             console.log("Message sent: " + res.message);
         }
     smtpTransport.close();
      }); });
  let data = [{
    //page one data
    generalDetails: req.body.generalDetails,
    fName: req.body.fName,
    mName: req.body.mName,
    lName: req.body.lName,
    email: req.body.email,
   }];
   res.json(data);
 }
);
app.listen(port, () => `Server running on port ${port}`);

Answer 1

我认为您与http模块相混淆。更换您的

app = express.createServer();

app = express();

如果要使用createServer，则应执行以下

const http = require('http');
const express = require('express');
var app = express();
... your route config
var server = http.createServer(app)
server.listen(3000, function () {
  console.log('Express is running on port 3000')
})