const http = require('http')const server = http.createServer((req, res) =>{  res.end('hello world');}).listen(8080)  server.on('upgrade', (req, client, head) => {    const headers = _getProxyHeader(req.headers) //将客户端的websocket头和一些信息转发到真正的处理服务器上    headers.hostname = 'localhost'//目标服务器    headers.path = '/' 目标路径     headers.port = 6443    const proxy = http.request(headers) //https可用https，headers中加入rejectUnauthorized=false忽略证书验证    proxy.on('upgrade', (res, socket, head) => {      client.write(_formatProxyResponse(res))//使用目标服务器头信息响应客户端      client.pipe(socket)      socket.pipe(client)    })    proxy.on('error', (error) => {      client.write("Sorry, cant't connect to this container ")      return    })    proxy.end()    function _getProxyHeader(headers) {      const keys = Object.getOwnPropertyNames(headers)      const proxyHeader = { headers: {} }      keys.forEach(key => {        if (key.indexOf('sec') >= 0 || key === 'upgrade' || key === 'connection') {          proxyHeader.headers[key] = headers[key]          return        }        proxyHeader[key] = headers[key]      })      return proxyHeader    }    function _formatProxyResponse(res) {      const headers = res.headers      const keys = Object.getOwnPropertyNames(headers)      let switchLine = '\r\n';      let response = [`HTTP/${res.httpVersion} ${res.statusCode} ${res.statusMessage}${switchLine}`]      keys.forEach(key => {        response.push(`${key}: ${headers[key]}${switchLine}`)      })      response.push(switchLine)      return response.join('')    }  })