javascript - 使用 Express http-proxy 从 API 存储 token

Question

我正在设置一个通用的 React 应用程序并使用 this project作为基地。我成功地将请求(使用 http-proxy )代理到我的 Laravel 后端。但是，我是 Nodejs 的新手，我不知道如何将 JWT 从代理服务器安全地存储到客户端的最佳方法。

我最初的想法是将 token 存储到 localStorage，但问题是 express 服务器无法访问它。所以我的下一个猜测是将其存储为 cookie，但我不确定如何将其存储在客户端或将其作为所有传出请求的 header 包含(此外，我可能需要某种 csrf 中间件)。

那么我将如何操纵来 self 的 api 服务器的响应以将 token 放入客户端中设置的 cookie 中，然后将其用作所有 api 请求的不记名 token ？

// server.js
const targetUrl = 'http://' + config.apiHost + ':' + config.apiPort;
const app = new Express();
const server = new http.Server(app);

const proxy = httpProxy.createProxyServer({
  target: targetUrl,
  changeOrigin: true
});

// Proxy to Auth endpoint
app.use('/auth', (req, res) => {
  // on a successful login, i want to store the token as a cookie
  proxy.web(req, res, {target: targetUrl});
});

// Proxy to api endpoint
app.use('/api', (req, res) => {
  // use the token in the cookie, and add it as a authorization header in the response
  proxy.web(req, res, {target: targetUrl});
});

Answer 1

鉴于 laravel 中 auth 端点的响应是这样的:

{ 
    "token" : "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ"
}

此代码将执行您想要的操作:

// server.js
const targetUrl = 'http://' + config.apiHost + ':' + config.apiPort;
const Express = require('express');
const http = require('http');
const httpProxy = require('http-proxy');
const app = new Express();
const server = new http.Server(app);
const Cookies = require( "cookies" )

const proxy = httpProxy.createProxyServer({
  target: targetUrl,
  changeOrigin: true
});

// Proxy to Auth endpoint
app.use('/auth', (req, res) => {
  // on a successful login, i want to store the token as a cookie
  // this is done in the proxyRes
  proxy.web(req, res, {target: targetUrl});
});

// Proxy to api endpoint
app.use('/api', (req, res) => {
  // use the token in the cookie, and add it as a authorization header in the response
  var cookies = new Cookies( req, res )
  req.headers.authorization = "JWT " + cookies.get('jwt-token');
  proxy.web(req, res, {target: targetUrl});
});

proxy.on('proxyRes', function(proxyRes, req, res) {
    if (req.originalUrl === '/auth') {
        var cookies = new Cookies( req, res )
        var body = '';
        var _write = res.write;
        var _end = res.end;
        var _writeHead = res.writeHead;
        var sendHeader = false;

        res.writeHead = function () {
            if (sendHeader) {
                _writeHead.apply( this, arguments );
            }
        }
        res.write = function (data) {
            body += data;
        }
        res.end = function () {
            sendHeader = true;
            var parsed = JSON.parse(body);
            cookies.set('jwt-token', parsed.token);
            _write.apply(this, [ body ]);
            _end.apply(this, arguments);
        }

    }
});