我嘗試在 C++ 和 node.js 服務(wù)器之間建立套接字通信。這是我的 index.js 代碼：'use strict';const express     = require('express');const app         = express();const serverHttp  = require('http').Server(app); const io = require('socket.io')(serverHttp);const port = 8081;io.on('connection', function (socket) {       socket.on('message', function (data) {        console.log("key received!!!" + data);    socket.emit('server', 'hello socket io');        console.log("sent server msg");    });});serverHttp.listen(port, function() {      console.log("init!!!");    });這是我編譯成功的 C++ 代碼：#include <stdio.h>#include <stdlib.h>#include <assert.h>#ifdef _WIN32#include <winsock2.h>#include <ws2tcpip.h>#else#include <string.h>#include <unistd.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <netdb.h>#endif#ifdef _WIN32#define close(sockdep) closesocket(sockdep)#define perror(errmsg) { fprintf(stderr, "%s: %d\n", (errmsg), WSAGetLastError()); }#endif#define net_assert(err, errmsg) { if ((err)) { perror(errmsg); assert(!(err)); } }#define SERVER "localhost"#define PORT 8081#define BLEN 128intmain(int argc, char *argv[]){  struct sockaddr_in server;  struct hostent *sp;  int sd;  int n;  char buf[BLEN];#ifdef _WIN32  int err;  WSADATA wsa;  extern int write();    err = WSAStartup(MAKEWORD(2,2), &wsa);  // winsock 2.2  net_assert(err, "sample client: WSAStartup");#endif  }  我的環(huán)境是 Mac，我正在使用 Xcode 來編譯 c++。我將節(jié)點連接node index.js到本地主機，還編譯并運行了 C++ 程序。但是，當(dāng)我打開 localhost:8081 時，我在控制臺中收到此錯誤：GET http://localhost:8081/ 404 (Not Found)        localhost/:1 Refused to load the image 'http://localhost:8081/favicon.ico' because it violates the following Content Security Policy directive: "default-src 'none'". Note that 'img-src' was not explicitly set, so 'default-src' is used as a fallback.            localhost/:1我對編程很陌生，如果你能澄清什么是錯的，我將不勝感激。我無法識別 C++ 中的發(fā)送和接收代碼在哪里，因為它與 JavaScript 有很大不同。那么，我怎樣才能構(gòu)建一個簡單的通信，我只想將一個數(shù)組從 C++ 發(fā)送到 index.js？