最简单的WSAEventSelect模型（注意注释的地方）

// Win32SocketTest.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "winsock2.h"//#pragma comment(lib,"wsock32.lib")#pragma comment(lib,"Ws2_32.lib")#include <iostream>int _tmain(int argc, _TCHAR* argv[]){int arg = 1000;int theOp = ~arg + 1;int theOp2 = ~theOp + 1;//启动socketWSADATA data;WSAStartup(MAKEWORD(2,2),&data);//设置服务器地址SOCKADDR_IN addr;addr.sin_family = AF_INET;addr.sin_port = htons(5000);addr.sin_addr.S_un.S_un_b.s_b1 = 113;addr.sin_addr.S_un.S_un_b.s_b2 = 90;addr.sin_addr.S_un.S_un_b.s_b3 = 50;addr.sin_addr.S_un.S_un_b.s_b4 = 170;int len = sizeof(addr);//创建socketSOCKET s = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);//绑定socketbind(s,(sockaddr*)&addr,sizeof(addr));while(true){//监听socketlisten(s,SOMAXCONN);//创建与socket关联的事件WSAEVENT event = WSACreateEvent();WSAEventSelect(s,event,FD_ACCEPT | FD_CLOSE);//等待事件发生////////////////////////////////////////////////////////////////////////////阻塞！必须建立线程去处理。。以后改进。DWORD nResult = WaitForSingleObject(event, INFINITE);if (nResult == WAIT_OBJECT_0){//查询是什么事件发生了。WSANETWORKEVENTS ne;WSAEnumNetworkEvents(s,event,&ne);if (ne.lNetworkEvents&FD_ACCEPT){//为这个客户端建立一个套接字用来收发数据。SOCKADDR_IN clientAddr;int addrlen = sizeof(clientAddr);SOCKET sClient = accept(s, (sockaddr*)&clientAddr, &addrlen);///////////////////////////////////////////////////////////////////////////////阻塞！必须建立线程去处理。。以后改进。WSAEVENT eventWriteRead = WSACreateEvent();WSAEventSelect(sClient,eventWriteRead,FD_WRITE|FD_READ|FD_CLOSE);while (true){WaitForSingleObject(eventWriteRead,INFINITE);{//查询是什么事件发生了。WSANETWORKEVENTS ne;WSAEnumNetworkEvents(sClient,eventWriteRead,&ne);if (ne.lNetworkEvents&FD_WRITE){char a[1000];memset(a,0,sizeof(a));std::cin>>a;send(sClient, a, sizeof(a),0);}else if (ne.lNetworkEvents&FD_READ){char buf[1000];buf[999] = 0;recv( sClient,buf,len,0);std::cout<<buf;}else if (ne.lNetworkEvents&FD_CLOSE){closesocket(s);}}WSAResetEvent(eventWriteRead);}//////////////////////////////////////////////////////////////////////////}else{closesocket(s);}} //////////////////////////////////////////////////////////////////////////WSAResetEvent(event);}return 0;}

 要改进的地方

1。阻塞的地方waiforsingle改为waitformultiple，并且用线程去处理。

2。用短连接代替长连接来处理。收到一个完整的业务包之后，进行关闭。