javascript - 使用 Node.js 代理 POST 并修改 header

Question

我的本​​地开发脚本使用代理来绕过 CORS(除其他外)。我首先获取一些虚假的 cookie，这些 cookie 允许我在开发时跳过应用程序中的身份验证。然后，对 spoofCookies 的回调设置我的静态代理 - 它提供我所有的本地静态内容，然后为路由到/microsvc 的所有调用设置代理。我接听该电话，注入(inject)我的欺骗性 cookie，并将其转发到远程主机上的同一路径。

这个脚本非常适合 GET，但我不知道如何编写 POST 部分。请求从未显示我通过代理发送的 POST 表单，因此我一定做错了什么。

感谢您的宝贵时间

    /*jslint node:true white:true nomen:true es5:true*/

'use strict';

var PORT_HTTP = process.env.PORT || 4400;
var localAddress =  "http://localhost:" + PORT_HTTP;

var apiAddress = {      label:      "On-site Ethernet Plug",
                        protocol:   "http://",
                        port:       80,
                        host :      "10.17.100.11",
                        microsvc:   "/microsvc",
                        auth:       "/login.form"
                 };

var https = require('https');
var path = require('path');
var express = require('express');
var app = express();
var spoofCookie = require('./utils/spoof-cookies');
var cookies = [];

var proxy = function(myPath, searchOptions, req, res, cookies) {
    var options = {
        hostname: apiAddress.host,
        port: apiAddress.port,
        path: apiAddress.microsvc + searchOptions,
        rejectUnauthorized: false
    };

    if(cookies.length){
        options.headers = {
            "Cookie":cookies[0]
        };
    }

    try {
        console.log('FROM: ' + localAddress + myPath + searchOptions + '\n' +
                    '↳ TO: ' + apiAddress.protocol + apiAddress.host + apiAddress.microsvc + searchOptions);

        options.method = req.method;

        if(options.method == 'POST' || options.method == 'PUT') {

            // HELP
            // form data never appears in output
            console.log(req);

        } else {
            var r = https.request(options, function(resX) {
                resX.setEncoding('utf8');
                var responseData = '';
                resX.on('data', function(chunk) {
                    responseData += chunk;
                });
                resX.on('end', function() {
                    res.send(JSON.parse(responseData));
                });
            });

            r.on('error', function(e) {
                if (e.code == "ENOTFOUND") {
                    console.error("File not found on remote");
                } else {
                    console.error('ff ' + e);
                }
            });
        }

        req.pipe(r).pipe(res);

    } catch (e) {
        console.error(e);
    }
};

// START - first get spoofed cookies
spoofCookie.getCookies(apiAddress, function(cookies) { 

    // set up server
    var httpServer = http.createServer(app);
    httpServer.listen(PORT_HTTP);

    // microservice proxy
    app.use('/microsvc', function (req, res) {
        proxy('/microsvc', req.url, req, res, cookies);
    });

    console.log("HTTP server started: " + localAddress);

});


// static server runs anything that isn't set up for proxy
app.use(express.static(path.resolve(path.join(__dirname, "..", "app"))));

Answer 1

express is not parsing默认请求正文。

req.body contains key-value pairs of data submitted in the request body. By default, it is undefined, and is populated when you use body-parsing middleware such as body-parser and multer.

因此，body-parser 的设置看起来像这样。

首先，在声明路由之前将中间件附加到某处:

var bodyParser = require('body-parser');

// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }));

// parse application/json
app.use(bodyParser.json());

// microservice proxy
app.use('/microsvc', function (req, res) {
    proxy('/microsvc', req.url, req, res, cookies);
});

然后，访问request.body中的请求内容:

if(options.method == 'POST' || options.method == 'PUT') {
    console.log(req.body);
}