node.js，express，如何在post请求中从body form-data中获取数据 [英] node.js, express, how to get data from body form-data in post request

问题描述

我有一个简单的 node.js 应用程序.我想从用户那里获取帖子正文.

I have a simple node.js app. I want to get post body from user.

app.js

var express = require('express');
var app = express();

app.use(express.json());

app.post('/api/user', function (req, res) {
    console.log(req.body);
    console.log(req.body.username);
});

module.exports = app;

server.js

var app = require('./app.js');

var server = app.listen(3000, function () {

    var port = server.address().port;

    console.log('Web App Hosted at http://localhost:%s',port);

});

当我用 node server.js 启动它时，它很好.当我与邮递员核对时，

When i launch it with node server.js, its fine. When i check it with postman,

在控制台中，它返回

Web App Hosted at http://localhost:3000
{}
undefined

我有最新的快递.

我尝试了其他的事情，比如添加 body-parser，添加标题到 content-type，添加 express.urlencoded()，但没有工作.我需要像上面图片中的邮递员一样从 form-data 获取数据.我怎样才能得到它?

And i have try other thing like add body-parser, add header to content-type, add express.urlencoded(), but none work. i need to get data from form-data like postman on picture above. How i can get it?

推荐答案

下班后，我找到了.

body-parser 不需要，因为在最新的 express 中包含了.

body-parser its not required because in newest express is included.

我已经找到了如何获取表单数据，它需要 multer(用于解析多部分/表单数据)中间件.我在这里找到了它.

i have found how to get form-data, it require multer(for parsing multipart/form data) middleware. i have found it in here.

首先安装multer

npm install multer --save

在您的应用中导入multer.例如在我的代码中

import multer in your app. for example in my code

var express = require('express');
var app = express();
var multer = require('multer');
var upload = multer();

// for parsing application/json
app.use(express.json()); 

// for parsing application/x-www-form-urlencoded
app.use(express.urlencoded({ extended: true })); 

// for parsing multipart/form-data
app.use(upload.array()); 
app.use(express.static('public'));

app.post('/api/user', function (req, res) {
    console.log(req.body);
    console.log(req.body.username);
});

module.exports = app;

因此，它可以接收表单数据、原始数据或 x-www-form-urlencoded.

so, it can receive form-data, raw, or x-www-form-urlencoded.

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