Node.js 18的现代异步方式，零依赖:

server.mjs:

import { createServer } from 'node:http';

const rawReqToString = async (req) => {
    const buffers = [];
    for await(const chunk of req){
        buffers.push(chunk);
    }
    return Buffer.concat(buffers).toString();
};

const server = createServer(async (req, res) => {
    const object = JSON.parse(await rawReqToString(req));
    ...
});

server.listen(3000, 'localhost', () => {
    console.log(`The server is running.`);
})

如果它涉及文件上传，浏览器通常以“multipart/form-data”内容类型发送它。 您可以在这种情况下使用它

var multipart = require('multipart');
multipart.parse(req)

参考1

参考2

如果你使用Express (Node.js的高性能、高级web开发)，你可以这样做:

HTML:

<form method="post" action="/">
    <input type="text" name="user[name]">
    <input type="text" name="user[email]">
    <input type="submit" value="Submit">
</form>

API客户端:

fetch('/', {
    method: 'POST',
    headers: {
        'Content-Type': 'application/json'
    },
    body: JSON.stringify({
        user: {
            name: "John",
            email: "john@example.com"
        }
    })
});

Node.js:(自Express v4.16.0起)

// Parse URL-encoded bodies (as sent by HTML forms)
app.use(express.urlencoded());

// Parse JSON bodies (as sent by API clients)
app.use(express.json());

// Access the parse results as request.body
app.post('/', function(request, response){
    console.log(request.body.user.name);
    console.log(request.body.user.email);
});

Node.js:(对于Express <4.16.0)

const bodyParser = require("body-parser");

/** bodyParser.urlencoded(options)
 * Parses the text as URL encoded data (which is how browsers tend to send form data from regular forms set to POST)
 * and exposes the resulting object (containing the keys and values) on req.body
 */
app.use(bodyParser.urlencoded({
    extended: true
}));

/**bodyParser.json(options)
 * Parses the text as JSON and exposes the resulting object on req.body.
 */
app.use(bodyParser.json());

app.post("/", function (req, res) {
    console.log(req.body.user.name)
});

您可以使用“request - Simplified HTTP client”和Javascript Promise轻松地发送和获取POST请求的响应。

var request = require('request');

function getData() {
    var options = {
        url: 'https://example.com',
        headers: {
            'Content-Type': 'application/json'
        }
    };

    return new Promise(function (resolve, reject) {
        var responseData;
        var req = request.post(options, (err, res, body) => {
            if (err) {
                console.log(err);
                reject(err);
            } else {
                console.log("Responce Data", JSON.parse(body));
                responseData = body;
                resolve(responseData);
            }
        });
    });
}

如果有人试图淹没你的RAM，一定要杀死连接!

var qs = require('querystring');

function (request, response) {
    if (request.method == 'POST') {
        var body = '';
        request.on('data', function (data) {
            body += data;
            // 1e6 === 1 * Math.pow(10, 6) === 1 * 1000000 ~~~ 1MB
            if (body.length > 1e6) { 
                // FLOOD ATTACK OR FAULTY CLIENT, NUKE REQUEST
                request.connection.destroy();
            }
        });
        request.on('end', function () {

            var POST = qs.parse(body);
            // use POST

        });
    }
}

如果你将数据编码为JSON，然后将其发送到Node.js，会更简洁。

function (req, res) {
    if (req.method == 'POST') {
        var jsonString = '';

        req.on('data', function (data) {
            jsonString += data;
        });

        req.on('end', function () {
            console.log(JSON.parse(jsonString));
        });
    }
}