node.js - Express4.10 bodyParser req.body 未定义

Question

我正在尝试构建 Node 应用程序的登录名，尝试访问路由/登录获取:req.body undefined

错误:

TypeError: Cannot read property 'usuario' of undefined
   at login (/home/makros/workspace/ntalk/controllers/home.js:8:24)
   at Layer.handle [as handle_request] (/home/makros/workspace/ntalk/node_modules/express/lib/router/layer.js:82:5)
   at next (/home/makros/workspace/ntalk/node_modules/express/lib/router/route.js:100:13)
   at Route.dispatch (/home/makros/workspace/ntalk/node_modules/express/lib/router/route.js:81:3)
   at Layer.handle [as handle_request] (/home/makros/workspace/ntalk/node_modules/express/lib/router/layer.js:82:5)
   at /home/makros/workspace/ntalk/node_modules/express/lib/router/index.js:235:24
   at Function.proto.process_params (/home/makros/workspace/ntalk/node_modules/express/lib/router/index.js:313:12)
   at /home/makros/workspace/ntalk/node_modules/express/lib/router/index.js:229:12
   at Function.match_layer (/home/makros/workspace/ntalk/node_modules/express/lib/router/index.js:296:3)
   at next (/home/makros/workspace/ntalk/node_modules/express/lib/router/index.js:190:10)

app.js

var express = require('express'),
load = require('express-load'),
cookieParser = require('cookie-parser'),
session = require('express-session'),
bodyParser = require('body-parser'),
app = express();


load('models')
    .then('controllers')
    .then('routes')
    .into(app);

app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');

app.use(cookieParser('secret'));
app.use(session({
    secret: 'secret', 
    resave: true, 
    saveUninitialized: true
}));

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

app.use(express.static(__dirname + '/public'));

app.listen(3000,function(){
    console.log('Started!');
});

package.json

{
  "name": "ntalk",
  "version": "1.0.0",
  "private": true,
  "scripts": {
  "start": "node ./bin/www"
  },
  "dependencies": {
  "body-parser": "^1.9.0",
  "cookie-parser": "^1.3.3",
  "ejs": "~0.8.5",
  "express": ">= 0.0.0",
  "express-load": "^1.1.14",
  "express-session": "^1.8.2"
  }
}

Controller /home.js

module.exports = function(app) {
    return {
        index: function(req, res) {
            res.render('home/index');
        },
        login: function(req, res){
            console.log(req.params);
            var email = req.body.usuario.email,
                nome = req.body.usuario.nome;
            if(email && nome) {
                var usuario = req.body.usuario;
                usuario['contatos'] = [];
                req.session.usuario = usuario;
                res.redirect('/contatos');
            } else {
                res.redirect('/');
            }
        },
        logout: function(req, res){
            req.session.destroy();
            res.redirect('/');
        }
    };
};

路线/home.js

module.exports = function(app) {
    var home = app.controllers.home;    
    app.get('/', home.index);
    app.get ('/entrar', home.login);
    app.get('/sair', home.logout);
};

views/home/index.ejs

<% include ../header %>
        <header>
            <h1>Ntalk</h1>
            <h4>Bem-vindo!</h4>
        </header>
        <section>
            <form action="/entrar" method="post">
                <input type="text" name="usuario[nome]" placeholder="Seu nome">
                <br>
                <input type="text" name="usuario[email]" placeholder="Seu e-mail">
                <br>
                <button type="submit">Entrar</button>
            </form>
        </section>
<% include ../footer %>

请帮助我!

Answer 1

您将在正文解析中间件之前将路由处理程序添加到 app 中。所有路由/中间件/等。添加到 app 的内容在 Express 4 中按顺序执行。

所以移动这个:

load('models')
    .then('controllers')
    .then('routes')
    .into(app);

此行之后:

app.use(express.static(__dirname + '/public'));

在一个不相关的注释中，您通常应该将 express.static() 用法放在路由/中间件列表的顶部附近，以提高效率。例如，这可以防止自动 session 创建和静态 Assets 请求的不必要的 cookie 解析。