Server - 持续处理的客户端请求

一、服务端

---

在之前的解决方案下，新建控制台空项目，命名为EasyTcpSever,配置项目属性<在前一篇博客中有介绍 配置方法类似>

新建server.cpp，黏贴以下代码：

#define WIN32_LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <Windows.h>
#include <WinSock2.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib") 

int main()
{
	WORD ver = MAKEWORD(2, 2);
	WSADATA dat;
	WSAStartup(ver, &dat);
	//1建立套接字
	SOCKET _sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	//2绑定用于接受客户端链接的网络端口
	sockaddr_in _sin = {};
	_sin.sin_family = AF_INET;
	_sin.sin_port = htons(4567);//主机转网络字节地址
	_sin.sin_addr.S_un.S_addr = INADDR_ANY; //接收
	if (bind(_sock, (sockaddr*)&_sin, sizeof(_sin)) == SOCKET_ERROR)
	{
		printf("绑定网络端口失败！");
	}
	else{
		printf("绑定网络端口成功！");
	}

	//3 监听端口
	if (SOCKET_ERROR == listen(_sock, 5))
	{
		printf("监听失败！");
	}
	else
	{
		printf("监听成功！");
	}
	//4 accept 等待客户端链接
	sockaddr_in _clientAddr = {};
	int nAddrLen = sizeof(sockaddr_in);
	SOCKET _cSock = INVALID_SOCKET;
	
	_cSock = accept(_sock, (sockaddr*)&_clientAddr, &nAddrLen);//接收连接
	if (_cSock == INVALID_SOCKET)
	{
		printf("当前是无效客户端套接字!!!\n");
	}
	printf("接收到新客户端加入:IP = %s!!!\n", inet_ntoa(_clientAddr.sin_addr));

	while (true)
	{
		char recvBuf[256] = {};
		int nLen = recv(_cSock, recvBuf, 256, 0);
		if (nLen <= 0)
		{
			printf("客户端已退出!!!\n");
			break;
		}
       //处理请求
		if (strcmp(recvBuf, "name") == 0)
		{
			char msgBuf[] = "小明";
			send(_cSock, msgBuf, strlen(msgBuf) + 1, 0);
		}
		else if (strcmp(recvBuf, "age") == 0)
		{
			char msgBuf[] = "18";
			send(_cSock, msgBuf, strlen(msgBuf) + 1, 0);
		}
		else
		{
			printf("处理请求-无效请求!!!\n");
		}
	}

	//6 关闭套接字
	closesocket(_sock);
	WSACleanup();
	getchar();
	return 0;
}

二、客户端

---

在之前的解决方案下，新建控制台空项目，命名为EasyTcpSever,配置项目属性<在前一篇博客中有介绍 配置方法类似>

新建client.cpp，黏贴以下代码：

#define WIN32_LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#include <Windows.h>
#include <WinSock2.h>
#include <stdio.h> 
#pragma comment(lib,"ws2_32.lib")


int main()
{
	WORD ver = MAKEWORD(2, 2);
	WSADATA dat;
	WSAStartup(ver, &dat);
	//1 建立套接字
	SOCKET _sock = socket(AF_INET, SOCK_STREAM, 0);
	if (INVALID_SOCKET == _sock)
	{
		printf("客户端创建套接字失败!!!\n");
	}
	else
	{
		printf("客户端创建套接字成功!!!\n");
	}
	//2 链接服务器
	sockaddr_in _sin = {};
	_sin.sin_family = AF_INET;
	_sin.sin_port = htons(4567);
	_sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
	int ret = connect(_sock,(sockaddr*)&_sin,sizeof(sockaddr_in));
	if (SOCKET_ERROR == ret)
	{
		printf("服务器连接失败!!!\n");
	}
	else
	{
		printf("服务器连接成功!!!\n");
	}

	//3处理输入
	while (true)
	{
		char scanfBuf[256] = {};
		scanf("%s", scanfBuf);
		if (0 == strcmp(scanfBuf, "exit"))
		{
			//4处理退出
			printf("退出客户端!!!\n");
			break;
		}
		else if (0 == strcmp(scanfBuf, "name"))
		{
			//5向服务器发送请求
			send(_sock, scanfBuf, strlen(scanfBuf) + 1, 0);
		}
		else if (0 == strcmp(scanfBuf, "age"))
		{
			// 5向服务器发送请求
			send(_sock, scanfBuf, strlen(scanfBuf) + 1, 0);
		}
		else
		{
			printf("输入的请求不合法!!!\n");
		}
		//6 接收数据
		char recvBuf[256] = {};
		int nLen = recv(_sock, recvBuf, 256, 0);
		if (nLen > 0)
		{
			printf("服务器发来消息：%s\n", recvBuf);
		}

	}
	
	//7关闭套接字
	closesocket(_sock);
	WSACleanup();
	getchar();
	return 0;
}