11-文件截取：服务器代码

#include<iostream>
#include<Windows.h>
#pragma comment(lib,"ws2_32.lib")
using namespace std;
#define MAX_SIZE 1024

void ErrHanding(const char* errmsg)		//代替
{
	fputs(errmsg, stderr);
	fputc('\n', stderr);
	system("pause");
	exit(1);
}

bool initsocket()		//封装初始化网络库的函数
{
	WORD wVersionRequested;
	WSADATA wsadata;
	int err;
	wVersionRequested = MAKEWORD(2, 2);

	err = WSAStartup(wVersionRequested, &wsadata);
	if (err)
	{
		ErrHanding("WSAStartup err");
		return false;
	}

	if (LOBYTE(wsadata.wVersion) != 2 || HIBYTE(wsadata.wVersion) != 2)
	{
		
		WSACleanup();
		ErrHanding("LOBYTE err");
		return false;
	}
	return true;
}


int main()
{
	char msg[MAX_SIZE] = { 0 };
	if (!initsocket())
		return 0;

	SOCKET hServerSock = socket(PF_INET, SOCK_STREAM, 0);
	if (INVALID_SOCKET == hServerSock)
	{
		ErrHanding("socket err");
	}

	SOCKADDR_IN addrSrv;
	addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
	addrSrv.sin_family = AF_INET;
	addrSrv.sin_port = htons(9999);

	if (SOCKET_ERROR == bind(hServerSock, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)))
	{
		ErrHanding("bind err");
		return -1;
	}


	if (SOCKET_ERROR == listen(hServerSock, 1))
	{
		ErrHanding("listen err");
		return -1;
	}

	SOCKADDR_IN addrCli;
	int len = sizeof(SOCKADDR);

	char sendBuf[100] = { 0 };
	char recvBuf[100] = { 0 };
	SOCKET clisock;

	while (1)
	{
		clisock = accept(hServerSock, (SOCKADDR*)&addrCli, &len);
		if (SOCKET_ERROR == clisock)
		{
			ErrHanding("accept err");
		}
		memset(msg, 0, MAX_SIZE);
		while (len = recv(clisock,msg,MAX_SIZE,0))
		{
			printf("Server msg: \n%s\n", msg);

		}
		closesocket(clisock);

	}
	closesocket(hServerSock);
	WSACleanup();
	return 0;

}