建立能持续处理请求的Server端改造

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#include<iostream>
#include<Windows.h>
using namespace std;

int main()
{
	//初始化ws2_32.dll
	WORD ver = MAKEWORD(2, 2);
	WSADATA wsaData;
	WSAStartup(ver, &wsaData);//对应WSACleanup的调用
	//1.建立一个socket
	SOCKET _sock = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (_sock == INVALID_SOCKET)
	{
		cout<<"创建socket失败" << endl;
		WSACleanup();
		return 0;

	}
	else
	{
		cout << "创建socket成功" << endl;
	}
	//填充sockaddr_in结构
	sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(1234);
	sin.sin_addr.S_un.S_addr = INADDR_ANY;
	//2.绑定端口
	if (bind(_sock, (sockaddr*)&sin, sizeof(sin)) == SOCKET_ERROR)
	{
		cout << "绑定端口失败" << endl;
		WSACleanup();
		return 0;
	}
	else
	{
		cout << "绑定端口成功" << endl;
	}
	//3.Listen监听网络端口
	if (listen(_sock, 10) == SOCKET_ERROR)
	{
		cout << "监听端口失败" << endl;
		WSACleanup();
		return 0;
	}
	else
	{
		cout << "监听端口成功" << endl;
	}
	//4.accept等待客户端连接
	sockaddr_in clientAddr;
	int nAddrLen= sizeof(clientAddr);
	SOCKET client;
	client = accept(_sock, (sockaddr*)&clientAddr, &nAddrLen);
	if (client == INVALID_SOCKET)
	{
		cout << "接受到无效客户端" << endl;
		WSACleanup();
		return 0;
	}
	else
	{
		cout << "接受客户端连接成功" << endl;
	}
	cout << "新客户端连接IP： " << inet_ntoa(clientAddr.sin_addr) << endl;

	char Hc[128] = {};
	while (true)
	{
		//5.接受客户端请求数据
		int nVen=recv(client, Hc,128,0);
		if (nVen <= 0)
		{
			cout << "客户端已退出,任务结束" << endl;
			break;
		}
		else
		{
			cout << "接受到来自客户端的请求:  " << Hc << endl;
		}
		//6.处理客户端发来的命令
		if (0 == strcmp(Hc, "getname"))  //用strcmp函数对比发送来的命令
		{
			char Name[] = "诸葛亮";
			//7.send向客户端发送一条数据
			send(client, Name, strlen(Name) + 1, 0);
		}
		else if (0 == strcmp(Hc, "getage"))
		{
			char Age[] = "50";
			send(client, Age, strlen(Age) + 1, 0);
		}
		else
		{
			char Yichang[] = "未找到该命令，请重新输入命令请求";
			send(client, Yichang, strlen(Yichang) + 1, 0);
		}


	}

	//6.关闭套接字closesocket
	closesocket(client);
	closesocket(_sock);

	//清楚windows socket环境
	WSACleanup();
	cout << "已退出" << endl;
	system("pause");
	return 0;
}