Question

作为初学者我试图在节点js中使用express来开发一个非常简单的服务我的服务的目标是获取一个值的简单索引页面，并在提交后显示在下一页。这是app.js中的我的代码。我无法通过req.body获得文本框的值。当我在控制台中打印req.body.response时显示未定义。任何帮助将不胜感激。

var http = require('http'); //used for http request
var express = require('express'); //express
var session = require('express-session'); //used for creating session

var bodyParser = require('body-parser');
var errorHandler = require('errorhandler'); //used for error handling
var cookieParser = require('cookie-parser'); //used for creation of cookies
var MongoStore = require('connect-mongo')(session); //mongo
var path = require('path');

var app = express();

app.set('views/index', path.join(__dirname, 'views/index'));
app.set('view engine', 'jade');
app.set('port', process.env.PORT || 3000);
app.use(cookieParser());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

// build mongo database connection url //

var dbHost = process.env.DB_HOST || 'localhost'
var dbPort = process.env.DB_PORT || 27017;
var dbName = process.env.DB_NAME || 'demo';

var dbURL = 'mongodb://'+dbHost+':'+dbPort+'/'+dbName;

var data = '';

var response;
app.get('/', function(req, res) {
    console.log(req.body.title);
    response = {
        email:req.body.email,
        password:req.body.password
    };
    console.log(response);
    res.render('index', {  title: 'index' });

});

http.createServer(app).listen(app.get('port'), function(){
    console.log('Express server listening on port ' + app.get('port'));
});

// jade的代码

doctype html
html
  head
    title home
  body
    form(method='get')
      .col-lg-12
        .col-lg-6
          label name
        .col-lg-6
          input(type='text', name='name')
      .col-lg-12
        .col-lg-6
          label email
        .col-lg-6
          input(type='email', name='email')
      .col-lg-12
        .col-lg-6
          label Password
        .col-lg-6
          input(type='password', name='password')
      .col-lg-12
        input(type='submit', name='submit', value='Save')

Answer 1

要发送数据，您的表单需要POST，而不是GET。

doctype html
html
  head
    title home
  body
    form(method='post', action='/')
      .col-lg-12
        .col-lg-6
          label name
        .col-lg-6
          input(type='text', name='name')
      .col-lg-12
        .col-lg-6
          label email
        .col-lg-6
          input(type='email', name='email')
      .col-lg-12
        .col-lg-6
          label Password
        .col-lg-6
          input(type='password', name='password')
      .col-lg-12
        input(type='submit', name='submit', value='Save')

然后，您的应用程序中会出现req.body.name，req.body.email和req.body.password。您没有提交任何名为title的内容，因此req.body.title = undefined。

Answer 2

请查看明确的文档：

如果您通过GET查询字符串提交数据，那么express将提供已经解析为req.query对象属性的参数，而不是req.body

无法从node.js中的req.body获取值

2 个答案: