第三方API使用本地bash代理将数据从本地计算机发送到其自身（这里是一个简化版本）：wget -q -T 25 --post-data "aa=bb&cc=dd" --no-check-certificate "$url"
有问题的机器使用ISP提供的互联网，该ISP阻止了第三方地址，所以我尝试创建一个代理服务器，它将接收来自代理的数据并将其转发到第三方服务器。**问题是转发的req.body作为空对象到达，我不明白为什么。**这里是一个简化的节点。代理API和第三方模拟API失败的js代码：

const http = require('http')
const compression = require('compression')
const express = require('express')

const httpServerPort = process.env.SERVER_PORT   /// SET YOUR PORT

const app = express()
app.use(express.urlencoded({ extended: true, limit: '50mb' }))
app.use(compression())

const httpServer = http.createServer(app)

httpServer.listen(httpServerPort, () => {
    console.log(`HTTP server started on port ${httpServerPort}`)
})

app.post('/api/v1/agent_proxy', async (req, res) => {
    try {
        const postData = querystring.stringify(req.body)
//        console.log(postData)
        const options = {
            hostname: 'localhost',
            port: httpServerPort,
            path: '/api/v1/simu_api',
            method: 'POST',
            Headers: {
                "Content-Type": "application/x-www-form-urlencoded",
                "Content-Length": Buffer.byteLength(postData)
            }
        }

        const innerReq = http.request(options, (innerRes) => {
            innerRes.on('data', (d) => {
                console.log(`statusCode: ${res.statusCode}`) 
                res.sendStatus(200)
            });
        });

        innerReq.on('error', (error) => {
            console.error(error)
            res.sendStatus(500)
        });

        innerReq.write(postData)
        innerReq.end()

    } catch (err) {
        console.error(err)
        res.sendStatus(501)
    }
})

app.post('/api/v1/simu_api', async (req, res) => {
    try {
////////// HERE I CAN SEE THE PROBLEM OF req.body == {} WHILE IT SHOULD BE EQUAL TO {aa: 'bb', cc: 'dd'} /////////
        console.log(req.body) 
    } catch (err) {
        console.error(err)
        res.sendStatus(501)
    }
    res.sendStatus(200)
})