javascript - 使用 Node.js HTTP 服务器获取和设置单个 Cookie

Question

我希望能够设置一个 cookie，并在向 nodejs 服务器实例发出的每个请求中读取该单个 cookie。几行代码就能搞定，不需要拉入第三方库？

var http = require('http');

http.createServer(function (request, response) {
  response.writeHead(200, {'Content-Type': 'text/plain'});
  response.end('Hello World\n');
}).listen(8124);

console.log('Server running at http://127.0.0.1:8124/');

只是尝试直接从 nodejs.org 获取上述代码，并在其中添加一个 cookie。

Answer 1

没有快速访问获取/设置 cookie 的功能，所以我想出了以下 hack:

const http = require('http');

function parseCookies (request) {
    const list = {};
    const cookieHeader = request.headers?.cookie;
    if (!cookieHeader) return list;

    cookieHeader.split(`;`).forEach(function(cookie) {
        let [ name, ...rest] = cookie.split(`=`);
        name = name?.trim();
        if (!name) return;
        const value = rest.join(`=`).trim();
        if (!value) return;
        list[name] = decodeURIComponent(value);
    });

    return list;
}

const server = http.createServer(function (request, response) {
    // To Read a Cookie
    const cookies = parseCookies(request);

    // To Write a Cookie
    response.writeHead(200, {
        "Set-Cookie": `mycookie=test`,
        "Content-Type": `text/plain`
    });

    response.end(`Hello World\n`);
}).listen(8124);

const {address, port} = server.address();
console.log(`Server running at http://${address}:${port}`);

这会将所有cookies存储到cookies对象中，需要在写head的时候设置cookies。