javascript - Express.js 路由器发布请求返回 404

Question

当我尝试从 html 表单发送请求时，我的 Express 服务器返回 404 错误。但是 get 请求工作正常。我已将服务器和路由的文件分开。我无法在 app.js 中发出请求，因为请求太多(针对不同的页面)。我想向数据库发出插入后请求，但我无法从表单中获取任何信息。

我缺少什么吗？

我的 html 表单(确切地说是 ejs)

<form action="/add" method="POST">
     <input type="text" name="title" placeholder="Event name" />
     <input type="text" name="subcategory" placeholder="Category" />
     <input type="text" name="date" placeholder="Date" />
     <input type="text" name="place" placeholder="Place" />
     <input type="text" name="organisator" placeholder="Organisator" />
     <textarea name="description" placeholder="Description" onkeyup="adjust_textarea(this)"></textarea>
     <input type="submit" value="Add" />
 </form>

我的 App.js 文件(404 处理程序错误)

const express = require('express');
const path = require('path');
const logger = require('morgan');
const cookieParser = require('cookie-parser');
const bodyParser = require('body-parser');

var app = express();

app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

//db connection
var mysql = require("mysql");
app.use(function(req, res, next){
    res.locals.connection = mysql.createConnection({
        host     : 'localhost',
        user     : 'root',
        password : 'mypassword',
        database : 'mydb'
    });
    res.locals.connection.connect();
    next();
});

app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', require('./routes/index'));
app.use('/events', require('./routes/events'));

//handling errors
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

app.use(function(err, req, res, next) {
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};
  res.status(err.status || 500);
  res.render('error');
});

//server init
var http = require('http');

var server = http.createServer(app);
server.listen(4000);
if(server.listening){
  console.log('Server is listening on port 4000');
}

module.exports = app;

我的./routes/events.js 文件

const express = require('express');
const router = express.Router();

router.get('/', function (req, res, next) {
    let query = '*select query*';
    res.locals.connection.query(query, function (error, results, fields) {
        if (error) throw error;
        res.render('index', { title: 'Events', data: results });
    });
});

router.post('/add', function (req, res) {
    var obj = req.body.title;

    console.log(obj);
    res.redirect('/events');
});

What i see in browser

Answer 1

您的“routes/events.js”文件中列出了“add”端点，这导致最终路由的结构为“/events/add”。在您的表单中，您要发送到“/add”端点，因此要解决该问题，请将表单上的操作属性更改为“/events/add”或将“/add”端点移动到它自己的路由中，如下所示:

router.post('/add', function(req, res) {
    var obj = req.body.title;

    console.log(obj);
    res.redirect('/events');
});