{"id":36758,"date":"2025-05-12T08:36:03","date_gmt":"2025-05-12T00:36:03","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/36758.html"},"modified":"2025-05-12T08:36:03","modified_gmt":"2025-05-12T00:36:03","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3mfc-sockets%ef%bc%9a%e5%ae%a2%e6%88%b7%e7%ab%af%e4%b8%8e%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%9e%e4%be%8b%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/36758.html","title":{"rendered":"\u6df1\u5165\u7406\u89e3MFC Sockets\uff1a\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u5b9e\u4f8b\u6559\u7a0b"},"content":{"rendered":"

\u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 \"menu-r.4af5f7ec.gif\" <\/p>\n

\u7b80\u4ecb：\u7f51\u7edc\u7f16\u7a0b\u5bf9IT\u884c\u4e1a\u81f3\u5173\u91cd\u8981，MFC\u5e93\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u4fbf\u65b9\u5f0f\u5904\u7406Windows\u5e73\u53f0\u7684\u5957\u63a5\u5b57\u901a\u4fe1\u3002\u672c\u5b9e\u4f8b\u5c06\u5f15\u5bfc\u4f60\u4e86\u89e3\u5982\u4f55\u4f7f\u7528CAsyncSocket\u7c7b\u5728Visual Studio 2008\u73af\u5883\u4e2d\u6784\u5efa\u4e00\u4e2a\u57fa\u7840\u7684\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u901a\u4fe1\u7cfb\u7edf\u3002\u4f60\u5c06\u5b66\u4e60\u521b\u5efa\u548c\u76d1\u542c\u670d\u52a1\u5668\u7aef，\u4ee5\u53ca\u5ba2\u6237\u7aef\u5982\u4f55\u8fde\u63a5\u670d\u52a1\u5668，\u5e76\u5904\u7406\u6570\u636e\u4f20\u8f93\u548c\u7f51\u7edc\u9519\u8bef\u3002\u540c\u65f6，\u4f60\u5c06\u638c\u63e1\u5173\u95ed\u548c\u6e05\u7406\u8d44\u6e90\u7684\u6b63\u786e\u65b9\u6cd5，\u5e76\u53ef\u6269\u5c55\u5230\u591a\u7ebf\u7a0b\u5904\u7406\u4ee5\u63d0\u9ad8\u5e76\u53d1\u6027\u3002 \"mfc <\/p>\n

1. MFC\u5e93\u5957\u63a5\u5b57\u57fa\u7840 <\/h2>\n

\u5728\u672c\u7ae0\u8282\u4e2d，\u6211\u4eec\u5c06\u8e0f\u5165MFC（Microsoft Foundation Classes）\u5e93\u5957\u63a5\u5b57\u7684\u4e16\u754c，\u5e76\u4e3a\u63a5\u4e0b\u6765\u6df1\u5165\u63a2\u8ba8CAsyncSocket\u7c7b\u53ca\u5176\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f7f\u7528\u6253\u4e0b\u575a\u5b9e\u57fa\u7840\u3002\u9996\u5148，\u6211\u4eec\u4f1a\u4ece\u5957\u63a5\u5b57\u6280\u672f\u7684\u57fa\u672c\u6982\u5ff5\u548c\u5206\u7c7b\u8c08\u8d77，\u4e3a\u8bfb\u8005\u63d0\u4f9b\u5fc5\u8981\u7684\u7f51\u7edc\u901a\u4fe1\u80cc\u666f\u77e5\u8bc6\u3002\u968f\u540e，\u672c\u7ae0\u5c06\u4ecb\u7ecdMFC\u4e2d\u5957\u63a5\u5b57\u7f16\u7a0b\u7684\u4e24\u79cd\u4e3b\u8981\u65b9\u5f0f：\u57fa\u4e8e\u540c\u6b65\u7684CSocket\u7c7b\u548c\u57fa\u4e8e\u5f02\u6b65\u7684CAsyncSocket\u7c7b，\u4ee5\u53ca\u5b83\u4eec\u5404\u81ea\u7684\u5e94\u7528\u573a\u666f\u548c\u4f18\u52bf\u6240\u5728\u3002\u6b64\u5916，\u8bfb\u8005\u8fd8\u4f1a\u4e86\u89e3\u5230MFC\u5957\u63a5\u5b57\u7f16\u7a0b\u7684\u4e00\u4e9b\u51c6\u5907\u5de5\u4f5c\u548c\u57fa\u7840\u6b65\u9aa4，\u4e3a\u540e\u7eed\u7ae0\u8282\u4e2d\u7684\u4ee3\u7801\u793a\u4f8b\u548c\u5b9e\u8df5\u64cd\u4f5c\u505a\u597d\u94fa\u57ab\u3002 <\/p>\n

\/\/ \u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b：MFC\u5957\u63a5\u5b57\u7684\u57fa\u7840\u4f7f\u7528
\n#include <afxwin.h>
\n#include <afxsock.h><\/p>\n

class CMySocket : public CAsyncSocket
\n{
\npublic:
\n \/\/ \u91cd\u5199CAsyncSocket\u4e2d\u7684\u865a\u62df\u51fd\u6570\u4ee5\u5904\u7406\u7279\u5b9a\u4e8b\u4ef6
\n virtual void OnReceive(int nErrorCode)
\n {
\n \/\/ \u63a5\u6536\u5230\u6570\u636e\u65f6\u7684\u5904\u7406\u903b\u8f91
\n }
\n \/\/ \u5176\u4ed6\u91cd\u5199\u7684\u51fd\u6570
\n};<\/p>\n

int main(int argc, char* argv[])
\n{
\n \/\/ \u521d\u59cb\u5316MFC\u5e94\u7528
\n AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0);
\n \/\/ \u521b\u5efa\u5957\u63a5\u5b57\u5bf9\u8c61
\n CMySocket sock;
\n \/\/ \u8bbe\u7f6e\u548c\u6267\u884c\u540e\u7eed\u64cd\u4f5c…
\n return 0;
\n}<\/p>\n

\u901a\u8fc7\u4e0a\u8ff0\u4ee3\u7801，\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u4e00\u4e2aMFC\u5957\u63a5\u5b57\u7f16\u7a0b\u7684\u57fa\u7840\u6846\u67b6，\u8fd9\u4e2a\u6846\u67b6\u662f\u540e\u7eed\u5404\u7ae0\u8282\u4e2d\u6df1\u5165\u63a2\u8ba8\u7684\u57fa\u7840\u3002\u63a5\u4e0b\u6765，\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u7a76CAsyncSocket\u7c7b\u7684\u4f7f\u7528\u4ee5\u53ca\u5982\u4f55\u5728\u670d\u52a1\u5668\u7aef\u548c\u5ba2\u6237\u7aef\u8fdb\u884c\u521b\u5efa\u3001\u76d1\u542c\u548c\u8fde\u63a5\u64cd\u4f5c\u3002\u5728\u6bcf\u4e00\u7ae0\u8282\u4e2d，\u90fd\u4f1a\u6709\u8fd9\u6837\u7684\u4ee3\u7801\u5757\u548c\u903b\u8f91\u5206\u6790，\u4ee5\u5e2e\u52a9\u8bfb\u8005\u7406\u89e3\u5e76\u5b9e\u73b0\u81ea\u5df1\u7684\u7f51\u7edc\u901a\u4fe1\u7a0b\u5e8f\u3002 <\/p>\n

2. CAsyncSocket\u7c7b\u7684\u4f7f\u7528 <\/h2>\n

2.1 CAsyncSocket\u7c7b\u6982\u8ff0 <\/h3>\n

2.1.1 \u7c7b\u7684\u7279\u6027\u4e0e\u4f18\u52bf <\/h4>\n

CAsyncSocket\u7c7b\u4f5c\u4e3aMFC\u5e93\u4e2d\u63d0\u4f9b\u7684\u4e00\u79cd\u5957\u63a5\u5b57\u7f16\u7a0b\u65b9\u5f0f，\u5176\u4e3b\u8981\u4f18\u52bf\u5728\u4e8e\u7b80\u5316\u4e86\u7f51\u7edc\u7f16\u7a0b\u7684\u590d\u6742\u6027，\u901a\u8fc7\u6d88\u606f\u9a71\u52a8\u7684\u673a\u5236，\u5b9e\u73b0\u4e86\u5f02\u6b65\u901a\u4fe1\u3002\u5728\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u60c5\u51b5\u4e0b，\u65e0\u9700\u624b\u52a8\u7ba1\u7406\u591a\u4e2a\u5957\u63a5\u5b57\u7684\u8bfb\u5199\u4e8b\u4ef6，\u63d0\u9ad8\u4e86\u7a0b\u5e8f\u7684\u6548\u7387\u548c\u53ef\u7ef4\u62a4\u6027\u3002 <\/p>\n

\u4f7f\u7528CAsyncSocket\u7c7b，\u5f00\u53d1\u8005\u53ef\u4ee5\u4e13\u6ce8\u4e8e\u4e1a\u52a1\u903b\u8f91\u7684\u5b9e\u73b0，\u800c\u4e0d\u5fc5\u6df1\u5165\u5e95\u5c42\u7684\u5957\u63a5\u5b57API\u3002\u7279\u522b\u662f\u5bf9\u4e8e\u591a\u7ebf\u7a0b\u670d\u52a1\u5668，CAsyncSocket\u7c7b\u901a\u8fc7\u6d88\u606f\u6620\u5c04\u673a\u5236，\u80fd\u591f\u81ea\u52a8\u5730\u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u548c\u4e8b\u4ef6\u901a\u77e5\u5230\u5bf9\u5e94\u7684\u7a97\u53e3\u6216\u63a7\u4ef6\u4e0a，\u5927\u5927\u964d\u4f4e\u4e86\u591a\u7ebf\u7a0b\u95f4\u5171\u4eab\u8d44\u6e90\u7684\u540c\u6b65\u590d\u6742\u6027\u3002 <\/p>\n

2.1.2 CAsyncSocket\u7c7b\u4e0eCSocket\u7c7b\u7684\u5bf9\u6bd4 <\/h4>\n

CAsyncSocket\u7c7b\u63d0\u4f9b\u4e86\u8f83\u4e3a\u5e95\u5c42\u7684\u7f51\u7edc\u901a\u4fe1\u63a7\u5236，\u901a\u8fc7\u53d1\u9001\u548c\u63a5\u6536\u6d88\u606f\u6765\u5904\u7406\u7f51\u7edc\u4e8b\u4ef6，\u9002\u5408\u9700\u8981\u5bf9\u901a\u4fe1\u8fc7\u7a0b\u8fdb\u884c\u9ad8\u5ea6\u81ea\u5b9a\u4e49\u7684\u573a\u666f\u3002\u76f8\u6bd4\u4e4b\u4e0b，CSocket\u7c7b\u57fa\u4e8eCAsyncSocket\u7c7b，\u5e76\u4e14\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7ea7\u522b\u7684\u5c01\u88c5，\u5176\u8bbe\u8ba1\u66f4\u52a0\u9762\u5411\u5bf9\u8c61，\u589e\u52a0\u4e86\u4e32\u884c\u5316\u7b49\u9762\u5411\u5bf9\u8c61\u7684\u64cd\u4f5c\u3002 <\/p>\n

\u5177\u4f53\u5230\u4ee3\u7801\u5b9e\u73b0\u4e0a，CAsyncSocket\u7c7b\u8981\u6c42\u5f00\u53d1\u8005\u91cd\u5199\u7279\u5b9a\u7684\u865a\u51fd\u6570，\u5982OnReceive\u548cOnSend，\u800cCSocket\u7c7b\u5219\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u5c01\u88c5\u597d\u7684\u6210\u5458\u51fd\u6570\u5982Receive\u548cSend\u3002\u8fd9\u610f\u5473\u7740\u4f7f\u7528CAsyncSocket\u65f6，\u5f00\u53d1\u8005\u5fc5\u987b\u5bf9\u7f51\u7edc\u4e8b\u4ef6\u6709\u6240\u4e86\u89e3，\u800cCSocket\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u5c4f\u853d\u4e86\u4e8b\u4ef6\u5904\u7406\u7684\u590d\u6742\u6027\u3002 <\/p>\n

2.2 CAsyncSocket\u7c7b\u7684\u6210\u5458\u51fd\u6570 <\/h3>\n

2.2.1 \u57fa\u672c\u64cd\u4f5c\u51fd\u6570：Create, Bind, Connect, Listen, Accept <\/h4>\n

\u8fd9\u4e9b\u51fd\u6570\u662fCAsyncSocket\u7c7b\u7684\u57fa\u672c\u7ec4\u6210\u90e8\u5206，\u7528\u4e8e\u521d\u59cb\u5316\u5957\u63a5\u5b57，\u7ed1\u5b9a\u7aef\u53e3，\u53d1\u8d77\u8fde\u63a5，\u76d1\u542c\u7aef\u53e3\u4ee5\u53ca\u63a5\u53d7\u8fde\u63a5\u3002 <\/p>\n

Create\u51fd\u6570 \u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u5957\u63a5\u5b57，\u5176\u4ee3\u7801\u5757\u5982\u4e0b： <\/p>\n

BOOL CMyAsyncSocket::Create(int nPort, int nSocketType, long lEvent \/* = FD_READ *\/)
\n{
\n \/\/ \u53c2\u6570nPort\u4e3a\u672c\u5730\u7aef\u53e3\u53f7，nSocketType\u4e3a\u5957\u63a5\u5b57\u7c7b\u578b，\u4f8b\u5982SOCK_STREAM
\n \/\/ lEvent\u4e3a\u4e8b\u4ef6\u63a9\u7801，\u9ed8\u8ba4\u4e3aFD_READ
\n return CAsyncSocket::Create(nPort, nSocketType, lEvent);
\n}<\/p>\n

Bind\u51fd\u6570 \u5c06\u5957\u63a5\u5b57\u4e0e\u7279\u5b9a\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u7ed1\u5b9a，\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b： <\/p>\n

BOOL CMyAsyncSocket::Bind( UINT nPort, CString& strIP \/* = _T("0.0.0.0") *\/ )
\n{
\n \/\/ strIP\u662f\u7ed1\u5b9a\u7684IP\u5730\u5740，\u82e5\u4e3a"0.0.0.0"\u5219\u76d1\u542c\u6240\u6709\u63a5\u53e3
\n \/\/ nPort\u4e3a\u7aef\u53e3\u53f7
\n sockaddr_in localAddr;
\n localAddr.sin_family = AF_INET;
\n localAddr.sin_port = htons((UINT16)nPort);
\n localAddr.sin_addr.s_addr = inet_addr(T2A(strIP));<\/p>\n

return CAsyncSocket::Bind((SOCKADDR*)&localAddr, sizeof(localAddr));
\n}<\/p>\n

Connect\u51fd\u6570 \u7528\u4e8e\u53d1\u8d77\u4e00\u4e2a\u5957\u63a5\u5b57\u8fde\u63a5\u8bf7\u6c42，\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b： <\/p>\n

BOOL CMyAsyncSocket::Connect( CString& strIP, UINT nPort )
\n{
\n sockaddr_in destAddr;
\n destAddr.sin_family = AF_INET;
\n destAddr.sin_port = htons((UINT16)nPort);
\n destAddr.sin_addr.s_addr = inet_addr(T2A(strIP));<\/p>\n

return CAsyncSocket::Connect((SOCKADDR*)&destAddr, sizeof(destAddr));
\n}<\/p>\n

Listen\u51fd\u6570 \u7528\u4e8e\u4f7f\u5957\u63a5\u5b57\u8fdb\u5165\u76d1\u542c\u72b6\u6001，\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b： <\/p>\n

BOOL CMyAsyncSocket::Listen( int nConnectionBacklog )
\n{
\n \/\/ nConnectionBacklog\u8bbe\u7f6e\u6700\u5927\u8fde\u63a5\u7b49\u5f85\u961f\u5217\u957f\u5ea6
\n return CAsyncSocket::Listen(nConnectionBacklog);
\n}<\/p>\n

Accept\u51fd\u6570 \u7528\u4e8e\u63a5\u53d7\u4e00\u4e2a\u8fde\u63a5\u8bf7\u6c42，\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b： <\/p>\n

BOOL CMyAsyncSocket::Accept( CAsyncSocket& rConnectedSocket, SOCKADDR* lpSockAddr \/* = NULL *\/, int* lpSockAddrLen \/* = NULL *\/ )
\n{
\n \/\/ rConnectedSocket\u4e3a\u65b0\u8fde\u63a5\u7684\u5957\u63a5\u5b57\u5bf9\u8c61\u5f15\u7528
\n \/\/ lpSockAddr\u548clpSockAddrLen\u7528\u4e8e\u5b58\u653e\u5bf9\u7aef\u5957\u63a5\u5b57\u5730\u5740\u4fe1\u606f
\n return CAsyncSocket::Accept(rConnectedSocket, lpSockAddr, lpSockAddrLen);
\n}<\/p>\n

2.2.2 \u4e8b\u4ef6\u5904\u7406\u51fd\u6570：OnReceive, OnSend, OnAccept, OnConnect, OnClose <\/h4>\n

\u8fd9\u4e9b\u51fd\u6570\u7528\u4e8e\u5904\u7406\u4e0d\u540c\u7684\u7f51\u7edc\u4e8b\u4ef6，\u901a\u5e38\u5728\u6d3e\u751f\u7c7b\u4e2d\u88ab\u91cd\u5199\u3002\u4ee5\u4e0b\u662f\u8fd9\u4e9b\u51fd\u6570\u7684\u4e00\u822c\u7ed3\u6784\u548c\u7528\u6cd5： <\/p>\n

OnReceive\u4e8b\u4ef6\u5904\u7406 ：\u5f53\u6709\u6570\u636e\u5230\u8fbe\u65f6，\u5c06\u8c03\u7528\u6b64\u51fd\u6570\u3002 <\/p>\n

void CMyAsyncSocket::OnReceive( int nErrorCode )
\n{
\n if ( nErrorCode != 0 )
\n {
\n \/\/ \u9519\u8bef\u5904\u7406
\n }
\n else
\n {
\n \/\/ \u8bfb\u53d6\u548c\u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e
\n }
\n}<\/p>\n

OnSend\u4e8b\u4ef6\u5904\u7406 ：\u5f53\u6570\u636e\u6210\u529f\u53d1\u9001\u540e，\u5c06\u8c03\u7528\u6b64\u51fd\u6570\u3002 <\/p>\n

void CMyAsyncSocket::OnSend( int nErrorCode )
\n{
\n if ( nErrorCode != 0 )
\n {
\n \/\/ \u9519\u8bef\u5904\u7406
\n }
\n else
\n {
\n \/\/ \u786e\u8ba4\u6570\u636e\u5df2\u7ecf\u53d1\u9001\u5b8c\u6210
\n }
\n}<\/p>\n

OnAccept\u4e8b\u4ef6\u5904\u7406 ：\u5f53\u63a5\u53d7\u5230\u4e00\u4e2a\u8fde\u63a5\u8bf7\u6c42\u5e76\u6210\u529f\u5efa\u7acb\u8fde\u63a5\u540e，\u5c06\u8c03\u7528\u6b64\u51fd\u6570\u3002 <\/p>\n

void CMyAsyncSocket::OnAccept( int nErrorCode )
\n{
\n if ( nErrorCode != 0 )
\n {
\n \/\/ \u9519\u8bef\u5904\u7406
\n }
\n else
\n {
\n \/\/ \u5904\u7406\u65b0\u63a5\u53d7\u7684\u8fde\u63a5
\n }
\n}<\/p>\n

OnConnect\u4e8b\u4ef6\u5904\u7406 ：\u5f53\u6210\u529f\u4e0e\u8fdc\u7a0b\u5957\u63a5\u5b57\u5efa\u7acb\u8fde\u63a5\u540e，\u5c06\u8c03\u7528\u6b64\u51fd\u6570\u3002 <\/p>\n

void CMyAsyncSocket::OnConnect( int nErrorCode )
\n{
\n if ( nErrorCode != 0 )
\n {
\n \/\/ \u9519\u8bef\u5904\u7406
\n }
\n else
\n {
\n \/\/ \u8fde\u63a5\u6210\u529f，\u53ef\u4ee5\u5f00\u59cb\u53d1\u9001\u6570\u636e
\n }
\n}<\/p>\n

OnClose\u4e8b\u4ef6\u5904\u7406 ：\u5f53\u5957\u63a5\u5b57\u5173\u95ed\u65f6，\u5c06\u8c03\u7528\u6b64\u51fd\u6570\u3002 <\/p>\n

void CMyAsyncSocket::OnClose( int nErrorCode )
\n{
\n \/\/ \u6e05\u7406\u8d44\u6e90，\u5904\u7406\u8fde\u63a5\u5173\u95ed\u540e\u7684\u903b\u8f91
\n}<\/p>\n

2.3 CAsyncSocket\u7c7b\u7684\u7f51\u7edc\u4e8b\u4ef6\u5904\u7406 <\/h3>\n

2.3.1 \u4e8b\u4ef6\u5904\u7406\u673a\u5236\u4e0e\u6d88\u606f\u6620\u5c04 <\/h4>\n

CAsyncSocket\u7c7b\u91c7\u7528\u6d88\u606f\u6620\u5c04\u673a\u5236\u6765\u5904\u7406\u7f51\u7edc\u4e8b\u4ef6，\u5f00\u53d1\u8005\u9700\u8981\u5728\u6d3e\u751f\u7c7b\u4e2d\u91cd\u5199OnXXX\u51fd\u6570\u4ee5\u54cd\u5e94\u7f51\u7edc\u4e8b\u4ef6\u3002\u5f53\u5957\u63a5\u5b57\u72b6\u6001\u6539\u53d8\u65f6，MFC\u6846\u67b6\u5c06\u5411\u7a97\u53e3\u6d88\u606f\u961f\u5217\u53d1\u9001\u76f8\u5e94\u7684\u6d88\u606f\u3002\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\u53ef\u4ee5\u6839\u636e\u53c2\u6570nErrorCode\u5224\u65ad\u4e8b\u4ef6\u662f\u5426\u5904\u7406\u6210\u529f\u3002 <\/p>\n

\u6d88\u606f\u6620\u5c04\u9700\u8981\u5728C++\u7c7b\u7684\u5b9a\u4e49\u4e2d\u4f7f\u7528\u5b8f DECLARE_MESSAGE_MAP() \u58f0\u660e，\u5e76\u4f7f\u7528\u5b8f BEGIN_MESSAGE_MAP \u548c END_MESSAGE_MAP \u6765\u5b9e\u73b0\u6d88\u606f\u6620\u5c04\u3002 <\/p>\n

\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u7684\u4ee3\u7801\u6bb5，\u5c55\u793a\u4e86\u6d88\u606f\u6620\u5c04\u7684\u58f0\u660e\u4e0e\u5b9e\u73b0： <\/p>\n

class CMySocket : public CAsyncSocket
\n{
\nprotected:
\n \/\/ \u91cd\u5199\u4e8b\u4ef6\u5904\u7406\u51fd\u6570
\n virtual void OnReceive(int nErrorCode);
\n virtual void OnConnect(int nErrorCode);
\n virtual void OnClose(int nErrorCode);<\/p>\n

DECLARE_MESSAGE_MAP()
\n};<\/p>\n

BEGIN_MESSAGE_MAP(CMySocket, CAsyncSocket)
\n ON_MESSAGE(WM_SOCKET_READ, OnReceive)
\n ON_MESSAGE(WM_SOCKET_WRITE, OnSend)
\n ON_MESSAGE(WM_SOCKET_ACCEPT, OnAccept)
\n ON_MESSAGE(WM_SOCKET_CONNECT, OnConnect)
\n ON_MESSAGE(WM_SOCKET_CLOSE, OnClose)
\nEND_MESSAGE_MAP()<\/p>\n

2.3.2 \u5904\u7406\u7f51\u7edc\u5f02\u5e38\u7684\u7b56\u7565 <\/h4>\n

\u5904\u7406\u7f51\u7edc\u5f02\u5e38\u65f6，\u9996\u5148\u9700\u8981\u786e\u4fdd\u6240\u6709\u5957\u63a5\u5b57\u5728\u4e0d\u518d\u9700\u8981\u65f6\u80fd\u591f\u6b63\u786e\u5173\u95ed，\u907f\u514d\u8d44\u6e90\u6cc4\u9732\u3002\u5176\u6b21，\u5728OnReceive\u7b49\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d，\u9700\u8981\u5bf9nErrorCode\u8fdb\u884c\u68c0\u67e5，\u4ee5\u786e\u5b9a\u4e8b\u4ef6\u662f\u7531\u4e8e\u6b63\u5e38\u6761\u4ef6\u8fd8\u662f\u9519\u8bef\u6761\u4ef6\u5f15\u53d1\u7684\u3002 <\/p>\n

\u5728\u5b9e\u9645\u7684\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d，\u6bd4\u5982OnReceive，\u4e00\u4e2a\u5178\u578b\u7684\u7b56\u7565\u662f\u68c0\u67e5nErrorCode\u662f\u5426\u4e3a0（\u8868\u793a\u65e0\u9519\u8bef）\u3002\u5982\u679c\u975e0，\u5219\u5e94\u8c03\u7528AfxGetApp()->OnException()\u6765\u5904\u7406\u5f02\u5e38\u3002 <\/p>\n

void CMyAsyncSocket::OnReceive(int nErrorCode)
\n{
\n if (nErrorCode != 0)
\n {
\n AfxGetApp()->OnException();
\n return;
\n }
\n \/\/ \u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e
\n \/\/ …
\n}<\/p>\n

\u6b64\u5916，\u5bf9\u4e8e\u8bfb\u53d6\u548c\u53d1\u9001\u64cd\u4f5c，\u5e94\u5f53\u4f7f\u7528\u5faa\u73af\u6765\u786e\u4fdd\u6570\u636e\u88ab\u5b8c\u5168\u5904\u7406，\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u53ef\u9760\u6027\u548c\u5b8c\u6574\u6027\u3002\u4f8b\u5982，\u5728OnReceive\u4e2d，\u4e00\u4e2a\u53ef\u9760\u7684\u5904\u7406\u6570\u636e\u7684\u65b9\u6cd5\u662f： <\/p>\n

void CMyAsyncSocket::OnReceive(int nErrorCode)
\n{
\n if (nErrorCode != 0)
\n {
\n AfxGetApp()->OnException();
\n return;
\n }<\/p>\n

char buffer[1024];
\n int nBytesRead;
\n while ((nBytesRead = recv(m_hSocket, buffer, sizeof(buffer), 0)) > 0)
\n {
\n \/\/ \u5904\u7406\u8bfb\u53d6\u5230\u7684\u6570\u636e
\n }<\/p>\n

if (nBytesRead == SOCKET_ERROR)
\n {
\n AfxGetApp()->OnException();
\n }
\n}<\/p>\n

\u8fd9\u4e2a\u5faa\u73af\u786e\u4fdd\u4e86\u6240\u6709\u5230\u8fbe\u7684\u6570\u636e\u90fd\u88ab\u8bfb\u53d6\u548c\u5904\u7406，\u76f4\u5230recv\u8fd4\u56deSOCKET_ERROR，\u8fd9\u53ef\u80fd\u610f\u5473\u7740\u8fde\u63a5\u88ab\u5173\u95ed\u3002\u540c\u6837，\u5728\u53d1\u9001\u6570\u636e\u65f6，\u5e94\u8be5\u5728\u5faa\u73af\u4e2d\u4f7f\u7528send\u51fd\u6570，\u76f4\u5230\u6240\u6709\u6570\u636e\u90fd\u88ab\u53d1\u9001\u3002 <\/p>\n

3. \u670d\u52a1\u5668\u7aef\u7684\u521b\u5efa\u548c\u76d1\u542c <\/h2>\n

\u5728\u6784\u5efa\u7f51\u7edc\u5e94\u7528\u7a0b\u5e8f\u65f6，\u670d\u52a1\u5668\u7aef\u662f\u4e00\u4e2a\u4e0d\u53ef\u6216\u7f3a\u7684\u7ec4\u6210\u90e8\u5206，\u5176\u4e3b\u8981\u804c\u8d23\u662f\u76d1\u542c\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42，\u5e76\u6839\u636e\u8bf7\u6c42\u63d0\u4f9b\u76f8\u5e94\u7684\u670d\u52a1\u3002\u4e3a\u4e86\u521b\u5efa\u4e00\u4e2a\u9ad8\u6548\u7684\u670d\u52a1\u5668\u7aef，\u5f00\u53d1\u8005\u5fc5\u987b\u6df1\u523b\u7406\u89e3\u7f51\u7edc\u901a\u4fe1\u7684\u5de5\u4f5c\u539f\u7406，\u4ee5\u53ca\u5982\u4f55\u5229\u7528MFC\u5e93\u4e2d\u7684CAsyncSocket\u7c7b\u6765\u5b9e\u73b0\u8fd9\u4e00\u8fc7\u7a0b\u3002\u672c\u7ae0\u8282\u5c06\u6df1\u5165\u63a2\u8ba8\u670d\u52a1\u5668\u7aef\u7684\u8bbe\u8ba1\u4e0e\u5b9e\u73b0，\u5305\u62ec\u67b6\u6784\u8bbe\u8ba1\u3001\u4ee3\u7801\u5b9e\u73b0\u4ee5\u53ca\u591a\u7ebf\u7a0b\u670d\u52a1\u5668\u7684\u6784\u5efa\u3002 <\/p>\n

\u8bbe\u8ba1\u670d\u52a1\u5668\u7aef\u67b6\u6784 <\/h3>\n

\u670d\u52a1\u5668\u7aef\u67b6\u6784\u7684\u8bbe\u8ba1\u76f4\u63a5\u5173\u7cfb\u5230\u6574\u4e2a\u7cfb\u7edf\u7684\u6027\u80fd\u3001\u53ef\u6269\u5c55\u6027\u548c\u7a33\u5b9a\u6027\u3002\u4e00\u4e2a\u6709\u6548\u7684\u670d\u52a1\u5668\u7aef\u67b6\u6784\u80fd\u591f\u5904\u7406\u5927\u91cf\u7684\u5e76\u53d1\u8fde\u63a5，\u540c\u65f6\u4fdd\u8bc1\u6570\u636e\u4f20\u8f93\u7684\u9ad8\u6548\u548c\u5b89\u5168\u3002 <\/p>\n

\u670d\u52a1\u5668\u7684\u5de5\u4f5c\u6d41\u7a0b <\/h4>\n

\u670d\u52a1\u5668\u7aef\u7684\u57fa\u672c\u5de5\u4f5c\u6d41\u7a0b\u5305\u62ec\u521d\u59cb\u5316\u3001\u7ed1\u5b9a\u76d1\u542c\u5730\u5740\u3001\u76d1\u542c\u7aef\u53e3\u3001\u63a5\u53d7\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42，\u7136\u540e\u8fdb\u884c\u6570\u636e\u4f20\u8f93，\u76f4\u5230\u8fde\u63a5\u88ab\u5173\u95ed\u3002\u670d\u52a1\u5668\u7aef\u67b6\u6784\u8bbe\u8ba1\u4e2d\u9700\u8981\u8003\u8651\u7684\u5173\u952e\u56e0\u7d20\u5305\u62ec： <\/p>\n

  • \u5e76\u53d1\u5904\u7406\u80fd\u529b – \u670d\u52a1\u5668\u5e94\u80fd\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002 <\/li>\n
  • \u8d44\u6e90\u7ba1\u7406 – \u9ad8\u6548\u5730\u7ba1\u7406\u5185\u5b58\u548c\u5176\u4ed6\u7cfb\u7edf\u8d44\u6e90，\u907f\u514d\u8d44\u6e90\u6cc4\u9732\u3002 <\/li>\n
  • \u5b89\u5168\u6027 – \u4fdd\u8bc1\u4f20\u8f93\u7684\u6570\u636e\u5b89\u5168，\u9632\u6b62\u672a\u6388\u6743\u8bbf\u95ee\u548c\u6570\u636e\u6cc4\u9732\u3002 <\/li>\n

    \u670d\u52a1\u5668\u7684\u7ebf\u7a0b\u6a21\u578b\u9009\u62e9 <\/h4>\n

    \u4e3a\u4e86\u5b9e\u73b0\u9ad8\u6548\u5e76\u53d1\u5904\u7406，\u670d\u52a1\u5668\u7684\u7ebf\u7a0b\u6a21\u578b\u9009\u62e9\u81f3\u5173\u91cd\u8981\u3002\u5e38\u89c1\u7684\u6a21\u578b\u6709： <\/p>\n

      \n
    • \u5355\u7ebf\u7a0b\u6a21\u578b ：\u9002\u7528\u4e8e\u8f7b\u8d1f\u8f7d\u7684\u670d\u52a1\u5668，\u7b80\u5355\u6613\u5b9e\u73b0，\u4f46\u65e0\u6cd5\u5145\u5206\u5229\u7528\u73b0\u4ee3\u591a\u6838CPU\u7684\u8ba1\u7b97\u80fd\u529b\u3002 <\/li>\n
    • \u591a\u7ebf\u7a0b\u6a21\u578b ：\u4e3a\u6bcf\u4e2a\u8fde\u63a5\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b，\u80fd\u591f\u6709\u6548\u5904\u7406\u5e76\u53d1\u8bf7\u6c42，\u4f46\u4f1a\u5e26\u6765\u8f83\u5927\u7684\u7ebf\u7a0b\u7ba1\u7406\u5f00\u9500\u3002 <\/li>\n
    • \u7ebf\u7a0b\u6c60\u6a21\u578b ：\u9884\u5148\u521b\u5efa\u5e76\u7ef4\u62a4\u4e00\u5b9a\u6570\u91cf\u7684\u7ebf\u7a0b，\u901a\u8fc7\u4efb\u52a1\u961f\u5217\u5206\u914d\u7ed9\u7ebf\u7a0b\u6267\u884c\u3002\u8be5\u6a21\u578b\u65e2\u80fd\u6709\u6548\u5904\u7406\u5e76\u53d1\u8bf7\u6c42，\u53c8\u80fd\u591f\u907f\u514d\u9891\u7e41\u7684\u7ebf\u7a0b\u521b\u5efa\u9500\u6bc1\u5e26\u6765\u7684\u5f00\u9500\u3002 <\/li>\n<\/ul>\n

      \u670d\u52a1\u5668\u7aef\u4ee3\u7801\u5b9e\u73b0 <\/h3>\n

      \u5728\u5b9e\u73b0\u670d\u52a1\u5668\u7aef\u4ee3\u7801\u65f6，\u6211\u4eec\u9700\u8981\u521b\u5efa\u4e00\u4e2aCAsyncSocket\u6d3e\u751f\u7c7b，\u5e76\u5728\u5176\u4e2d\u5b9e\u73b0\u5177\u4f53\u7684\u7f51\u7edc\u901a\u4fe1\u903b\u8f91\u3002 <\/p>\n

      CAsyncSocket\u6d3e\u751f\u7c7b\u7684\u521b\u5efa <\/h4>\n

      \u521b\u5efa\u4e00\u4e2aCAsyncSocket\u7684\u6d3e\u751f\u7c7b，\u6211\u4eec\u901a\u5e38\u91cd\u8f7d\u4ee5\u4e0b\u51fd\u6570： <\/p>\n

        \n
      • OnReceive ：\u5f53\u63a5\u6536\u5230\u6570\u636e\u65f6，\u6b64\u51fd\u6570\u5c06\u88ab\u8c03\u7528\u3002 <\/li>\n
      • OnConnect ：\u5f53\u5ba2\u6237\u7aef\u6210\u529f\u8fde\u63a5\u5230\u670d\u52a1\u5668\u65f6，\u6b64\u51fd\u6570\u88ab\u8c03\u7528\u3002 <\/li>\n
      • OnClose ：\u5f53\u8fde\u63a5\u5173\u95ed\u65f6，\u6b64\u51fd\u6570\u88ab\u8c03\u7528\u3002 <\/li>\n<\/ul>\n

        \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b： <\/p>\n

        class CServerSocket : public CAsyncSocket
        \n{
        \npublic:
        \n virtual void OnReceive(int nErrorCode);
        \n virtual void OnConnect(int nErrorCode);
        \n virtual void OnClose(int nErrorCode);
        \n \/\/ \u5176\u4ed6\u5fc5\u8981\u7684\u51fd\u6570\u5b9e\u73b0…
        \n};<\/p>\n

        \u5904\u7406\u76d1\u542c\u4e8b\u4ef6\u4e0e\u63a5\u53d7\u8fde\u63a5 <\/h4>\n

        \u670d\u52a1\u5668\u7aef\u9700\u8981\u76d1\u542c\u7279\u5b9a\u7aef\u53e3\u7684\u8fde\u63a5\u8bf7\u6c42，\u4e00\u65e6\u6536\u5230\u8bf7\u6c42，\u5c31\u9700\u8981\u63a5\u53d7\u8fde\u63a5\u5e76\u5904\u7406\u3002\u4ee5\u4e0b\u662f\u5904\u7406\u76d1\u542c\u4e8b\u4ef6\u4e0e\u63a5\u53d7\u8fde\u63a5\u7684\u793a\u4f8b\u4ee3\u7801： <\/p>\n

        void CServerSocket::OnAccept(int nErrorCode)
        \n{
        \n if (nErrorCode == 0)
        \n {
        \n \/\/ \u63a5\u53d7\u8fde\u63a5\u5e76\u521b\u5efa\u65b0\u7684CAsyncSocket\u6d3e\u751f\u7c7b\u5bf9\u8c61
        \n CClientSocket* pClient = new CClientSocket();
        \n Accept(*pClient); \/\/ \u63a5\u53d7\u8fde\u63a5
        \n \/\/ \u53ef\u4ee5\u5728\u8fd9\u91cc\u5b9e\u73b0\u66f4\u591a\u7684\u903b\u8f91，\u4f8b\u5982\u5c06pClient\u52a0\u5165\u5230\u4e00\u4e2a\u5217\u8868\u4e2d\u7528\u4e8e\u540e\u7eed\u7ba1\u7406
        \n \/\/ \u7ee7\u7eed\u76d1\u542c\u4e0b\u4e00\u4e2a\u8fde\u63a5\u8bf7\u6c42
        \n Listen();
        \n }
        \n else
        \n {
        \n \/\/ \u5904\u7406\u9519\u8bef\u60c5\u51b5
        \n AfxMessageBox(_T("Accept failed!"));
        \n }
        \n}<\/p>\n

        \u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d，\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u8fde\u63a5\u5904\u7406\u5bf9\u8c61 pClient ，\u5e76\u8c03\u7528 Accept \u65b9\u6cd5\u6765\u63a5\u53d7\u8fd9\u4e2a\u8fde\u63a5\u3002\u4e4b\u540e，\u6211\u4eec\u8c03\u7528 Listen \u65b9\u6cd5\u7ee7\u7eed\u76d1\u542c\u5176\u4ed6\u8fde\u63a5\u8bf7\u6c42\u3002 <\/p>\n

        \u591a\u7ebf\u7a0b\u670d\u52a1\u5668\u7684\u5b9e\u73b0 <\/h3>\n

        \u591a\u7ebf\u7a0b\u670d\u52a1\u5668\u662f\u5904\u7406\u5927\u91cf\u5e76\u53d1\u8bf7\u6c42\u7684\u6709\u6548\u65b9\u5f0f\u3002\u5728\u6b64\u90e8\u5206，\u6211\u4eec\u5c06\u6784\u5efa\u4e00\u4e2a\u57fa\u4e8e\u7ebf\u7a0b\u6c60\u6a21\u578b\u7684\u591a\u7ebf\u7a0b\u670d\u52a1\u5668\u3002 <\/p>\n

        \u7ebf\u7a0b\u6c60\u6a21\u578b\u7684\u6784\u5efa <\/h4>\n

        \u6784\u5efa\u7ebf\u7a0b\u6c60\u6a21\u578b\u80fd\u591f\u6709\u6548\u5730\u590d\u7528\u7ebf\u7a0b\u8d44\u6e90，\u51cf\u5c11\u56e0\u9891\u7e41\u521b\u5efa\u548c\u9500\u6bc1\u7ebf\u7a0b\u5e26\u6765\u7684\u5f00\u9500\u3002\u7ebf\u7a0b\u6c60\u901a\u5e38\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6838\u5fc3\u90e8\u5206： <\/p>\n

          \n
        • \u4efb\u52a1\u961f\u5217 ：\u5b58\u50a8\u5f85\u5904\u7406\u7684\u4efb\u52a1\u3002 <\/li>\n
        • \u5de5\u4f5c\u7ebf\u7a0b ：\u4ece\u961f\u5217\u4e2d\u53d6\u51fa\u4efb\u52a1\u5e76\u6267\u884c\u3002 <\/li>\n
        • \u540c\u6b65\u673a\u5236 ：\u4fdd\u8bc1\u7ebf\u7a0b\u5b89\u5168\u548c\u8d44\u6e90\u540c\u6b65\u3002 <\/li>\n<\/ul>\n

          \u5904\u7406\u5e76\u53d1\u8fde\u63a5\u4e0e\u8d44\u6e90\u7ba1\u7406 <\/h4>\n

          \u5728\u591a\u7ebf\u7a0b\u670d\u52a1\u5668\u4e2d\u5904\u7406\u5e76\u53d1\u8fde\u63a5\u548c\u8d44\u6e90\u7ba1\u7406\u65f6，\u9700\u8981\u8003\u8651\u5982\u4e0b\u65b9\u9762： <\/p>\n

        • \u4e92\u65a5\u9501（Mutex） ：\u4fdd\u8bc1\u5171\u4eab\u8d44\u6e90\u7684\u7ebf\u7a0b\u5b89\u5168，\u9632\u6b62\u6570\u636e\u7ade\u4e89\u3002 <\/li>\n
        • \u4fe1\u53f7\u91cf（Semaphore） ：\u63a7\u5236\u7ebf\u7a0b\u6c60\u4e2d\u7ebf\u7a0b\u7684\u6700\u5927\u6570\u91cf，\u9632\u6b62\u8d85\u51fa\u7cfb\u7edf\u8d1f\u8377\u3002 <\/li>\n
        • \u6761\u4ef6\u53d8\u91cf（Condition Variable） ：\u5b9e\u73b0\u7ebf\u7a0b\u95f4\u7684\u9ad8\u6548\u540c\u6b65\u3002 <\/li>\n

          \u5b9e\u73b0\u4e00\u4e2a\u591a\u7ebf\u7a0b\u670d\u52a1\u5668\u9700\u8981\u4ed4\u7ec6\u89c4\u5212\u6bcf\u4e2a\u7ec4\u4ef6\u7684\u8bbe\u8ba1\u548c\u4ea4\u4e92，\u4ee5\u786e\u4fdd\u7cfb\u7edf\u7a33\u5b9a\u9ad8\u6548\u5730\u8fd0\u884c\u3002 <\/p>\n

          \u901a\u8fc7\u672c\u7ae0\u8282\u7684\u4ecb\u7ecd，\u6211\u4eec\u4e86\u89e3\u4e86\u670d\u52a1\u5668\u7aef\u7684\u8bbe\u8ba1\u539f\u5219\u3001\u57fa\u672c\u7684\u5b9e\u73b0\u65b9\u5f0f\u4ee5\u53ca\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u7684\u670d\u52a1\u5668\u5b9e\u73b0\u3002\u5728\u63a5\u4e0b\u6765\u7684\u7ae0\u8282\u4e2d，\u6211\u4eec\u5c06\u6df1\u5165\u5ba2\u6237\u7aef\u7684\u521b\u5efa\u548c\u8fde\u63a5\u8fc7\u7a0b，\u5b66\u4e60\u5982\u4f55\u6784\u5efa\u4e00\u4e2a\u80fd\u591f\u4e0e\u670d\u52a1\u5668\u7aef\u8fdb\u884c\u9ad8\u6548\u901a\u4fe1\u7684\u5ba2\u6237\u7aef\u3002 <\/p>\n

          4. \u5ba2\u6237\u7aef\u7684\u521b\u5efa\u548c\u8fde\u63a5 <\/h2>\n

          4.1 \u5ba2\u6237\u7aef\u529f\u80fd\u6982\u8ff0 <\/h4>\n

          4.1.1 \u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u7684\u4ea4\u4e92\u6a21\u5f0f <\/h5>\n

          \u5728\u8bbe\u8ba1\u4e00\u4e2a\u5ba2\u6237\u7aef\u7a0b\u5e8f\u65f6，\u9996\u5148\u9700\u8981\u660e\u786e\u7684\u662f\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u4ea4\u4e92\u6a21\u5f0f\u3002\u6700\u5e38\u89c1\u7684\u6a21\u5f0f\u662f\u8bf7\u6c42-\u54cd\u5e94\u6a21\u5f0f，\u5176\u4e2d\u5ba2\u6237\u7aef\u53d1\u8d77\u4e00\u4e2a\u8bf7\u6c42，\u670d\u52a1\u5668\u5904\u7406\u8bf7\u6c42\u540e\u8fd4\u56de\u4e00\u4e2a\u54cd\u5e94\u3002\u6b64\u5916，\u5ba2\u6237\u7aef\u4e5f\u53ef\u4ee5\u4f7f\u7528\u63a8\u9001\u6a21\u5f0f，\u5176\u4e2d\u670d\u52a1\u5668\u4e3b\u52a8\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u4fe1\u606f，\u65e0\u9700\u5ba2\u6237\u7aef\u4e8b\u5148\u53d1\u9001\u8bf7\u6c42\u3002\u8fd9\u79cd\u6a21\u5f0f\u9002\u7528\u4e8e\u5b9e\u65f6\u6570\u636e\u66f4\u65b0\u7684\u573a\u666f，\u5982\u804a\u5929\u5e94\u7528\u6216\u80a1\u7968\u5e02\u573a\u4fe1\u606f\u3002 <\/p>\n

          \u5ba2\u6237\u7aef\u7a0b\u5e8f\u7684\u8bbe\u8ba1\u8fd8\u9700\u8981\u8003\u8651\u5230\u8fde\u63a5\u7684\u7a33\u5b9a\u6027\u3001\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u4ee5\u53ca\u9519\u8bef\u5904\u7406\u673a\u5236\u3002\u5b83\u9700\u8981\u80fd\u591f\u5904\u7406\u7f51\u7edc\u5ef6\u8fdf\u3001\u8fde\u63a5\u4e2d\u65ad\u4ee5\u53ca\u6570\u636e\u63a5\u6536\u9519\u8bef\u7b49\u95ee\u9898\u3002 <\/p>\n

          4.1.2 \u8fde\u63a5\u8fc7\u7a0b\u4e2d\u7684\u5e38\u89c1\u95ee\u9898 <\/h5>\n

          \u5728\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u7684\u8fc7\u7a0b\u4e2d，\u53ef\u80fd\u4f1a\u9047\u5230\u591a\u79cd\u95ee\u9898，\u5982\u670d\u52a1\u5668\u65e0\u6cd5\u8bbf\u95ee\u3001\u8fde\u63a5\u8d85\u65f6\u4ee5\u53ca\u8ba4\u8bc1\u5931\u8d25\u7b49\u3002\u4e3a\u4e86\u4f7f\u5ba2\u6237\u7aef\u80fd\u591f\u5065\u58ee\u5730\u5904\u7406\u8fd9\u4e9b\u95ee\u9898，\u9700\u8981\u8bbe\u8ba1\u5408\u9002\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\u548c\u91cd\u8fde\u7b56\u7565\u3002\u4f8b\u5982，\u5ba2\u6237\u7aef\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u91cd\u8bd5\u903b\u8f91，\u5f53\u9047\u5230\u7f51\u7edc\u95ee\u9898\u65f6\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5，\u5982\u679c\u8fde\u7eed\u591a\u6b21\u5931\u8d25，\u5219\u63d0\u793a\u7528\u6237\u3002 <\/p>\n

          4.2 \u5ba2\u6237\u7aef\u4ee3\u7801\u5b9e\u73b0 <\/h4>\n

          4.2.1 \u8bbe\u8ba1\u5ba2\u6237\u7aef\u901a\u4fe1\u534f\u8bae <\/h5>\n

          \u5ba2\u6237\u7aef\u9700\u8981\u6839\u636e\u5e94\u7528\u7684\u9700\u6c42\u8bbe\u8ba1\u4e00\u5957\u901a\u4fe1\u534f\u8bae，\u534f\u8bae\u53ef\u4ee5\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u8981\u7d20： – \u6570\u636e\u5305\u683c\u5f0f：\u5b9a\u4e49\u6570\u636e\u5305\u7684\u7ed3\u6784，\u4f8b\u5982\u8d77\u59cb\u5b57\u8282\u3001\u6570\u636e\u957f\u5ea6\u3001\u6570\u636e\u5185\u5bb9\u548c\u7ed3\u675f\u5b57\u8282\u3002 – \u534f\u8bae\u89c4\u5219：\u89c4\u5b9a\u6570\u636e\u5305\u7684\u89e3\u6790\u89c4\u5219\u548c\u53d1\u9001\u63a5\u6536\u7684\u987a\u5e8f，\u4f8b\u5982\u5ba2\u6237\u7aef\u9996\u5148\u53d1\u9001\u767b\u5f55\u8bf7\u6c42，\u670d\u52a1\u5668\u54cd\u5e94\u540e，\u5ba2\u6237\u7aef\u518d\u53d1\u9001\u6570\u636e\u8bf7\u6c42\u7b49\u3002 – \u9519\u8bef\u68c0\u6d4b\u4e0e\u6062\u590d：\u5b9a\u4e49\u5982\u4f55\u901a\u8fc7\u6821\u9a8c\u548c\u6216CRC\u7b49\u673a\u5236\u6765\u68c0\u6d4b\u6570\u636e\u4f20\u8f93\u4e2d\u7684\u9519\u8bef，\u5e76\u89c4\u5b9a\u9519\u8bef\u53d1\u751f\u65f6\u7684\u6062\u590d\u6d41\u7a0b\u3002 <\/p>\n

          \u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u901a\u4fe1\u534f\u8bae\u793a\u4f8b\u4f2a\u4ee3\u7801： <\/p>\n

          struct PacketHeader {
          \n char startByte; \/\/ \u6570\u636e\u5305\u5f00\u59cb\u6807\u8bb0
          \n unsigned short length; \/\/ \u6570\u636e\u5305\u603b\u957f\u5ea6
          \n \/\/ … \u5176\u4ed6\u5934\u90e8\u4fe1\u606f
          \n};<\/p>\n

          struct Packet {
          \n PacketHeader header;
          \n char* data;
          \n \/\/ … \u6839\u636e\u9700\u8981\u6dfb\u52a0\u5176\u4ed6\u5b57\u6bb5
          \n};<\/p>\n

          4.2.2 \u5b9e\u73b0\u8fde\u63a5\u670d\u52a1\u5668\u4e0e\u6570\u636e\u4f20\u8f93 <\/h5>\n

          \u8981\u5b9e\u73b0\u4e00\u4e2a\u5ba2\u6237\u7aef\u7a0b\u5e8f，\u9996\u5148\u9700\u8981\u521b\u5efa\u4e00\u4e2a CAsyncSocket \u7684\u6d3e\u751f\u7c7b\u3002\u5728\u8fd9\u4e2a\u6d3e\u751f\u7c7b\u4e2d，\u4f60\u9700\u8981\u5b9e\u73b0\u8fde\u63a5\u670d\u52a1\u5668\u7684\u65b9\u6cd5\u3002\u4f7f\u7528 Connect \u6210\u5458\u51fd\u6570\u6765\u5efa\u7acb\u5230\u670d\u52a1\u5668\u7684TCP\u8fde\u63a5\u3002 <\/p>\n

          \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b： <\/p>\n

          class CMyClientSocket : public CAsyncSocket
          \n{
          \npublic:
          \n \/\/ \u5728\u8fd9\u91cc\u6dfb\u52a0\u989d\u5916\u7684\u6210\u5458\u53d8\u91cf\u548c\u51fd\u6570<\/p>\n

          virtual void OnConnect(int nErrorCode);
          \n \/\/ … \u5176\u4ed6\u91cd\u8f7d\u7684\u4e8b\u4ef6\u5904\u7406\u51fd\u6570
          \n};<\/p>\n

          void CMyClientSocket::OnConnect(int nErrorCode)
          \n{
          \n if (nErrorCode == 0)
          \n {
          \n \/\/ \u8fde\u63a5\u6210\u529f\u5904\u7406
          \n \/\/ \u4f8b\u5982：\u53d1\u9001\u767b\u5f55\u4fe1\u606f
          \n }
          \n else
          \n {
          \n \/\/ \u8fde\u63a5\u5931\u8d25\u5904\u7406
          \n \/\/ \u4f8b\u5982：\u663e\u793a\u9519\u8bef\u6d88\u606f，\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5
          \n }
          \n}<\/p>\n

          \u7136\u540e，\u5728\u5ba2\u6237\u7aef\u4e3b\u7a0b\u5e8f\u4e2d\u521b\u5efa\u6d3e\u751f\u7c7b\u7684\u5b9e\u4f8b，\u5e76\u8c03\u7528 Connect \u6765\u8fde\u63a5\u5230\u670d\u52a1\u5668\u3002 <\/p>\n

          CMyClientSocket clientSocket;
          \nclientSocket.Create(); \/\/ \u521b\u5efa\u5957\u63a5\u5b57
          \nclientSocket.Connect((LPCTSTR)"\u670d\u52a1\u5668IP\u5730\u5740", \u7aef\u53e3\u53f7); \/\/ \u8fde\u63a5\u5230\u670d\u52a1\u5668<\/p>\n

          \u8fde\u63a5\u6210\u529f\u540e，\u53ef\u4ee5\u4f7f\u7528 Send \u548c Recv \u51fd\u6570\u6765\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u3002\u52a1\u5fc5\u8bb0\u5f97，\u4e3a\u4e86\u4fdd\u8bc1\u6570\u636e\u7684\u53ef\u9760\u4f20\u8f93，\u5e94\u8be5\u5904\u7406\u597d\u5404\u79cd\u7f51\u7edc\u4e8b\u4ef6，\u5e76\u5728\u5fc5\u8981\u65f6\u4f7f\u7528\u5f02\u6b65I\/O\u64cd\u4f5c\u3002 <\/p>\n

          \u5728\u5b9e\u73b0\u8fde\u63a5\u548c\u6570\u636e\u4f20\u8f93\u529f\u80fd\u65f6，\u4e00\u5b9a\u8981\u8003\u8651\u5230\u7ebf\u7a0b\u5b89\u5168\u6027，\u786e\u4fdd\u8d44\u6e90\u4e0d\u4f1a\u5728\u5e76\u53d1\u8bbf\u95ee\u65f6\u51fa\u73b0\u7ade\u6001\u6761\u4ef6\u3002\u8fd9\u901a\u5e38\u9700\u8981\u5728\u8bbf\u95ee\u5957\u63a5\u5b57\u8d44\u6e90\u65f6\u52a0\u5165\u9002\u5f53\u7684\u540c\u6b65\u673a\u5236，\u5982\u4e92\u65a5\u9501\u3002 <\/p>\n

          \u4ee5\u4e0a\u7ae0\u8282\u5185\u5bb9\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u5ba2\u6237\u7aef\u521b\u5efa\u548c\u8fde\u63a5\u8fc7\u7a0b\u4e2d\u9700\u8981\u6ce8\u610f\u7684\u5173\u952e\u70b9\u548c\u5b9e\u73b0\u7ec6\u8282，\u901a\u8fc7\u5b9e\u9645\u7684\u4ee3\u7801\u793a\u4f8b，\u5c55\u793a\u4e86\u5982\u4f55\u5229\u7528MFC\u7684 CAsyncSocket \u7c7b\u6765\u5b8c\u6210\u5ba2\u6237\u7aef\u901a\u4fe1\u7684\u6784\u5efa\u3002\u8fd9\u6837\u4e0d\u4ec5\u80fd\u591f\u786e\u4fdd\u7f51\u7edc\u901a\u4fe1\u7684\u7a33\u5b9a\u6027\u548c\u9ad8\u6548\u6027，\u800c\u4e14\u8fd8\u53ef\u4ee5\u901a\u8fc7\u81ea\u5b9a\u4e49\u7684\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\u6765\u63d0\u5347\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u548c\u7528\u6237\u4f53\u9a8c\u3002 <\/p>\n

          5. \u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536 <\/h2>\n

          \u6570\u636e\u901a\u4fe1\u662f\u7f51\u7edc\u7f16\u7a0b\u7684\u6838\u5fc3，\u800c\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u662f\u5b9e\u73b0\u6570\u636e\u901a\u4fe1\u7684\u5173\u952e\u6b65\u9aa4\u3002\u4e3a\u4e86\u786e\u4fdd\u6570\u636e\u80fd\u591f\u5728\u7f51\u7edc\u4e2d\u53ef\u9760\u3001\u9ad8\u6548\u5730\u4f20\u8f93，\u8bbe\u8ba1\u4e00\u5957\u5408\u7406\u7684\u6570\u636e\u4f20\u8f93\u534f\u8bae\u548c\u91c7\u53d6\u5408\u9002\u7684\u6280\u672f\u624b\u6bb5\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u672c\u7ae0\u5c06\u6df1\u5165\u63a2\u8ba8\u6570\u636e\u4f20\u8f93\u534f\u8bae\u7684\u8bbe\u8ba1\u3001\u6570\u636e\u53d1\u9001\u7684\u5173\u952e\u6280\u672f，\u4ee5\u53ca\u6570\u636e\u63a5\u6536\u8fc7\u7a0b\u4e2d\u7684\u7ba1\u7406\u7b56\u7565\u3002 <\/p>\n

          5.1 \u6570\u636e\u4f20\u8f93\u7684\u534f\u8bae\u8bbe\u8ba1 <\/h3>\n

          5.1.1 \u6570\u636e\u5305\u683c\u5f0f\u4e0e\u534f\u8bae\u89c4\u5219 <\/h4>\n

          \u5728\u8fdb\u884c\u6570\u636e\u901a\u4fe1\u4e4b\u524d，\u9996\u5148\u9700\u8981\u5b9a\u4e49\u6570\u636e\u5305\u7684\u683c\u5f0f\u548c\u4f20\u8f93\u534f\u8bae\u7684\u89c4\u5219\u3002\u6570\u636e\u5305\u683c\u5f0f\u7684\u8bbe\u8ba1\u51b3\u5b9a\u4e86\u6570\u636e\u7684\u5c01\u88c5\u548c\u89e3\u6790\u65b9\u5f0f，\u800c\u534f\u8bae\u89c4\u5219\u5b9a\u4e49\u4e86\u901a\u4fe1\u53cc\u65b9\u5982\u4f55\u4ea4\u6362\u6570\u636e\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u6570\u636e\u5305\u4e2d\u7684\u4fe1\u606f\u3002\u6570\u636e\u5305\u901a\u5e38\u7531\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206\u7ec4\u6210： <\/p>\n

        • \u8d77\u59cb\u5e27 ：\u7528\u4e8e\u6807\u8bc6\u4e00\u4e2a\u6570\u636e\u5305\u7684\u5f00\u59cb，\u5e2e\u52a9\u63a5\u6536\u65b9\u8fdb\u884c\u540c\u6b65\u3002 <\/li>\n
        • \u6570\u636e\u5305\u957f\u5ea6 ：\u6807\u8bc6\u5f53\u524d\u6570\u636e\u5305\u7684\u957f\u5ea6，\u63a5\u6536\u65b9\u53ef\u4ee5\u6839\u636e\u8fd9\u4e2a\u957f\u5ea6\u6765\u786e\u5b9a\u6570\u636e\u5305\u7684\u8fb9\u754c\u3002 <\/li>\n
        • \u63a7\u5236\u4fe1\u606f ：\u5305\u62ec\u5e8f\u5217\u53f7\u3001\u6821\u9a8c\u7801\u7b49，\u7528\u4e8e\u6570\u636e\u5305\u7684\u63a7\u5236\u548c\u9519\u8bef\u68c0\u6d4b\u3002 <\/li>\n
        • \u6570\u636e\u5185\u5bb9 ：\u5b9e\u9645\u4f20\u8f93\u7684\u6570\u636e\u4fe1\u606f\u3002 <\/li>\n
        • \u7ed3\u675f\u5e27 ：\u6807\u8bc6\u4e00\u4e2a\u6570\u636e\u5305\u7684\u7ed3\u675f，\u6709\u65f6\u4e0e\u8d77\u59cb\u5e27\u76f8\u540c，\u7528\u4e8e\u786e\u8ba4\u6570\u636e\u5b8c\u6574\u6027\u3002 <\/li>\n

          \u534f\u8bae\u89c4\u5219\u9700\u8981\u8003\u8651\u8bf8\u591a\u56e0\u7d20，\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e： <\/p>\n

            \n
          • \u6570\u636e\u5305\u5e8f\u53f7 ：\u786e\u4fdd\u6570\u636e\u5305\u7684\u987a\u5e8f\u6b63\u786e\u6027，\u9632\u6b62\u6570\u636e\u9519\u4e71\u3002 <\/li>\n
          • \u6821\u9a8c\u548c\/\u5faa\u73af\u5197\u4f59\u6821\u9a8c（CRC） ：\u5bf9\u6570\u636e\u5305\u5185\u5bb9\u8fdb\u884c\u6821\u9a8c，\u786e\u4fdd\u6570\u636e\u672a\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u88ab\u635f\u574f\u3002 <\/li>\n
          • \u786e\u8ba4\u673a\u5236（ACK\/NACK） ：\u53d1\u9001\u65b9\u53ef\u4ee5\u901a\u8fc7\u786e\u8ba4\u673a\u5236\u4e86\u89e3\u63a5\u6536\u65b9\u662f\u5426\u6210\u529f\u63a5\u6536\u5230\u6570\u636e\u5305\u3002 <\/li>\n
          • \u91cd\u4f20\u7b56\u7565 ：\u5728\u68c0\u6d4b\u5230\u6570\u636e\u5305\u4e22\u5931\u65f6，\u53d1\u9001\u65b9\u5e94\u91c7\u53d6\u9002\u5f53\u7684\u91cd\u4f20\u7b56\u7565\u3002 <\/li>\n<\/ul>\n

            5.1.2 \u4fdd\u8bc1\u6570\u636e\u5b8c\u6574\u6027\u7684\u65b9\u6cd5 <\/h4>\n

            \u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u662f\u8bbe\u8ba1\u6570\u636e\u4f20\u8f93\u534f\u8bae\u65f6\u4e0d\u53ef\u5ffd\u89c6\u7684\u4e00\u73af\u3002\u5e38\u89c1\u7684\u65b9\u6cd5\u5305\u62ec： <\/p>\n

              \n
            • \u6821\u9a8c\u548c\u8ba1\u7b97 ：\u5c06\u6570\u636e\u5305\u4e2d\u7684\u6570\u636e\u901a\u8fc7\u7279\u5b9a\u7684\u7b97\u6cd5\u8ba1\u7b97\u51fa\u4e00\u4e2a\u6821\u9a8c\u548c\u503c，\u5e76\u5728\u6570\u636e\u5305\u4e2d\u4e00\u8d77\u53d1\u9001\u3002\u63a5\u6536\u65b9\u63a5\u6536\u5230\u6570\u636e\u540e，\u5bf9\u6570\u636e\u8fdb\u884c\u540c\u6837\u7684\u6821\u9a8c\u548c\u8ba1\u7b97，\u5e76\u4e0e\u6536\u5230\u7684\u6821\u9a8c\u548c\u503c\u5bf9\u6bd4，\u4ee5\u5224\u65ad\u6570\u636e\u662f\u5426\u5b8c\u6574\u3002 <\/li>\n
            • \u5faa\u73af\u5197\u4f59\u6821\u9a8c（CRC） ：\u662f\u4e00\u79cd\u66f4\u4e3a\u590d\u6742\u7684\u6821\u9a8c\u65b9\u5f0f，\u76f8\u8f83\u4e8e\u6821\u9a8c\u548c，CRC\u63d0\u4f9b\u4e86\u66f4\u5f3a\u7684\u6570\u636e\u5b8c\u6574\u6027\u4fdd\u62a4\u80fd\u529b\u3002CRC\u901a\u8fc7\u591a\u9879\u5f0f\u9664\u6cd5\u8ba1\u7b97\u51fa\u4e00\u4e2a\u5197\u4f59\u503c，\u5e76\u4e0e\u6570\u636e\u4e00\u8d77\u53d1\u9001\u3002\u63a5\u6536\u65b9\u901a\u8fc7\u5bf9\u6570\u636e\u6267\u884c\u540c\u6837\u7684\u591a\u9879\u5f0f\u9664\u6cd5\u5e76\u6bd4\u8f83\u7ed3\u679c\u6765\u9a8c\u8bc1\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002 <\/li>\n
            • \u6570\u636e\u7b7e\u540d ：\u5728\u5b89\u5168\u6027\u8981\u6c42\u8f83\u9ad8\u7684\u573a\u666f\u4e0b，\u53ef\u4ee5\u5bf9\u6570\u636e\u5305\u8fdb\u884c\u7b7e\u540d，\u786e\u4fdd\u6570\u636e\u6765\u6e90\u7684\u53ef\u4fe1\u5ea6\u4ee5\u53ca\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002 <\/li>\n<\/ul>\n

              5.2 \u53d1\u9001\u6570\u636e\u7684\u6280\u672f\u8981\u70b9 <\/h3>\n

              5.2.1 \u5f02\u6b65\u53d1\u9001\u4e0e\u540c\u6b65\u53d1\u9001\u7684\u6bd4\u8f83 <\/h4>\n

              \u5728MFC\u5957\u63a5\u5b57\u7f16\u7a0b\u4e2d，\u6570\u636e\u53d1\u9001\u5206\u4e3a\u5f02\u6b65\u53d1\u9001\u548c\u540c\u6b65\u53d1\u9001\u4e24\u79cd\u65b9\u5f0f\u3002 <\/p>\n

                \n
              • \u540c\u6b65\u53d1\u9001 ：\u53d1\u9001\u64cd\u4f5c\u4f1a\u963b\u585e\u5f53\u524d\u7ebf\u7a0b，\u76f4\u5230\u6570\u636e\u53d1\u9001\u5b8c\u6210\u6216\u53d1\u751f\u9519\u8bef\u3002\u8fd9\u79cd\u65b9\u5f0f\u7684\u4f18\u70b9\u662f\u5b9e\u73b0\u7b80\u5355，\u5bf9\u53d1\u9001\u8fc7\u7a0b\u7684\u63a7\u5236\u6bd4\u8f83\u76f4\u63a5\u3002\u7136\u800c，\u5b83\u4f1a\u963b\u585e\u6267\u884c\u53d1\u9001\u64cd\u4f5c\u7684\u7ebf\u7a0b，\u4e0d\u9002\u5408\u4e8e\u9700\u8981\u540c\u65f6\u5904\u7406\u5176\u4ed6\u4efb\u52a1\u7684\u573a\u666f\u3002 \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b： cpp \/\/ \u540c\u6b65\u53d1\u9001\u6570\u636e int nResult = m_Socket.Send(data, data.Length(), 0); if (nResult == SOCKET_ERROR) { \/\/ \u53d1\u9001\u5931\u8d25\u5904\u7406 } <\/li>\n<\/ul>\n

                \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d， Send \u51fd\u6570\u5c06\u4f1a\u963b\u585e，\u76f4\u5230\u6570\u636e\u88ab\u5b8c\u5168\u53d1\u9001\u6216\u8005\u53d1\u751f\u9519\u8bef\u3002 nResult \u4f1a\u8fd4\u56de\u53d1\u9001\u7684\u5b57\u8282\u6570，\u5982\u679c\u8fd4\u56de SOCKET_ERROR \u5219\u8868\u793a\u53d1\u9001\u5931\u8d25\u3002 <\/p>\n

                  \n
                • \u5f02\u6b65\u53d1\u9001 ：\u5f02\u6b65\u53d1\u9001\u5141\u8bb8\u7a0b\u5e8f\u5728\u53d1\u9001\u6570\u636e\u7684\u540c\u65f6\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1\u3002\u8fd9\u5bf9\u4e8e\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u7684\u54cd\u5e94\u6027\u548c\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002\u5728MFC\u4e2d，\u53ef\u4ee5\u901a\u8fc7\u6d88\u606f\u6620\u5c04\u673a\u5236\u5904\u7406 OnSend \u4e8b\u4ef6，\u4ece\u800c\u5728\u6570\u636e\u53d1\u9001\u7684\u540c\u65f6\u6267\u884c\u5176\u4ed6\u4efb\u52a1\u3002 cpp \/\/ \u5f02\u6b65\u53d1\u9001\u6570\u636e if (!m_Socket.Send(data, data.Length(), 0)) { if (WSAGetLastError() == WSA_IO_PENDING) { \/\/ \u5f02\u6b65\u53d1\u9001\u5df2\u542f\u52a8，\u7b49\u5f85OnSend\u4e8b\u4ef6 } else { \/\/ \u53d1\u9001\u5931\u8d25\u5904\u7406 } } <\/li>\n<\/ul>\n

                  \u5728\u5f02\u6b65\u53d1\u9001\u4e2d，\u5982\u679c Send \u51fd\u6570\u8fd4\u56de false \u4e14\u9519\u8bef\u4ee3\u7801\u4e3a WSA_IO_PENDING ，\u5219\u8868\u793a\u5f02\u6b65\u64cd\u4f5c\u5df2\u542f\u52a8，\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1，\u5e76\u7b49\u5f85 OnSend \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u7684\u8c03\u7528\u3002 <\/p>\n

                  5.2.2 \u9632\u6b62\u6570\u636e\u963b\u585e\u7684\u7b56\u7565 <\/h4>\n

                  \u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d，\u6570\u636e\u53d1\u9001\u53ef\u80fd\u4f1a\u56e0\u4e3a\u7f51\u7edc\u72b6\u51b5\u4e0d\u4f73\u3001\u63a5\u6536\u65b9\u5904\u7406\u80fd\u529b\u6709\u9650\u7b49\u539f\u56e0\u5bfc\u81f4\u53d1\u9001\u7f13\u51b2\u533a\u6ee1，\u4ece\u800c\u4ea7\u751f\u963b\u585e\u3002\u4e3a\u4e86\u9632\u6b62\u6570\u636e\u963b\u585e，\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u7b56\u7565： <\/p>\n

                    \n
                  • \u63a7\u5236\u53d1\u9001\u901f\u5ea6 ：\u901a\u8fc7\u63a7\u5236\u53d1\u9001\u6570\u636e\u7684\u901f\u5ea6，\u907f\u514d\u53d1\u9001\u65b9\u5feb\u901f\u53d1\u9001\u5927\u91cf\u6570\u636e\u800c\u63a5\u6536\u65b9\u6765\u4e0d\u53ca\u5904\u7406\u3002 <\/li>\n
                  • \u6d41\u91cf\u63a7\u5236 ：\u901a\u8fc7\u5b9e\u73b0\u4e00\u79cd\u673a\u5236，\u6839\u636e\u7f51\u7edc\u72b6\u51b5\u548c\u63a5\u6536\u65b9\u7684\u5904\u7406\u80fd\u529b\u52a8\u6001\u8c03\u6574\u53d1\u9001\u901f\u5ea6\u3002 <\/li>\n
                  • \u4f7f\u7528\u53d1\u9001\u7a97\u53e3 ：\u53d1\u9001\u7a97\u53e3\u673a\u5236\u53ef\u4ee5\u4fdd\u8bc1\u53d1\u9001\u65b9\u4e0d\u4f1a\u56e0\u4e3a\u8d85\u91cf\u53d1\u9001\u6570\u636e\u800c\u9020\u6210\u963b\u585e\u3002\u8fd9\u4e2a\u673a\u5236\u901a\u8fc7\u4e00\u4e2a\u9884\u5b9a\u4e49\u7684\u7a97\u53e3\u5927\u5c0f\u6765\u63a7\u5236\u53d1\u9001\u65b9\u53ef\u4ee5\u53d1\u9001\u7684\u6570\u636e\u91cf\u3002 <\/li>\n<\/ul>\n

                    5.3 \u63a5\u6536\u6570\u636e\u7684\u5173\u952e\u6280\u672f <\/h3>\n

                    5.3.1 \u57fa\u4e8e\u4e8b\u4ef6\u7684\u6570\u636e\u63a5\u6536\u673a\u5236 <\/h4>\n

                    \u5728MFC\u5957\u63a5\u5b57\u7f16\u7a0b\u4e2d，\u57fa\u4e8e\u4e8b\u4ef6\u7684\u6570\u636e\u63a5\u6536\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u65b9\u5f0f\u3002\u5f53\u5957\u63a5\u5b57\u4e0a\u6709\u6570\u636e\u53ef\u8bfb\u65f6，\u5c06\u89e6\u53d1\u4e00\u4e2a\u4e8b\u4ef6，\u901a\u8fc7\u6d88\u606f\u6620\u5c04\u673a\u5236\u5c06\u8be5\u4e8b\u4ef6\u5173\u8054\u5230\u4e00\u4e2a\u5904\u7406\u51fd\u6570，\u4ece\u800c\u5b9e\u73b0\u6570\u636e\u7684\u63a5\u6536\u3002 <\/p>\n

                      \n
                    • \u6d88\u606f\u6620\u5c04\u5173\u8054 ：\u901a\u8fc7\u5b9a\u4e49\u6d88\u606f\u6620\u5c04\u5b8f，\u5c06 FD_READ \u7b49\u4e8b\u4ef6\u4e0e\u5bf9\u5e94\u7684\u5904\u7406\u51fd\u6570\u5173\u8054\u8d77\u6765，\u5f53\u4e8b\u4ef6\u53d1\u751f\u65f6，\u7cfb\u7edf\u4f1a\u81ea\u52a8\u8c03\u7528\u76f8\u5e94\u7684\u5904\u7406\u51fd\u6570\u3002 ```cpp \/\/ OnReceive\u6d88\u606f\u6620\u5c04\u51fd\u6570 BEGIN_MESSAGE_MAP(CMySocket, CAsyncSocket) \/\/… ON_MESSAGE(FD_READ, OnReceive) \/\/… END_MESSAGE_MAP() <\/li>\n<\/ul>\n

                      \/\/ \u63a5\u6536\u6570\u636e\u5904\u7406\u51fd\u6570 void CMySocket::OnReceive(UINT nErrorCode) { \/\/ \u5f53\u5957\u63a5\u5b57\u6709\u6570\u636e\u53ef\u8bfb\u65f6，\u6b64\u51fd\u6570\u5c06\u88ab\u8c03\u7528 if (nErrorCode == 0) { char buffer[1024]; int nBytesRead = Receive(buffer, sizeof(buffer)); if (nBytesRead > 0) { \/\/ \u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e } else { \/\/ \u5904\u7406\u63a5\u6536\u9519\u8bef\u6216\u7ed3\u675f\u60c5\u51b5 } } else { \/\/ \u9519\u8bef\u5904\u7406 } } ``` <\/p>\n

                      5.3.2 \u6570\u636e\u7f13\u51b2\u533a\u7684\u7ba1\u7406\u4e0e\u5904\u7406 <\/h4>\n

                      \u6570\u636e\u7f13\u51b2\u533a\u662f\u63a5\u6536\u6570\u636e\u65f6\u7528\u4e8e\u5b58\u50a8\u4e34\u65f6\u6570\u636e\u7684\u533a\u57df\u3002\u5408\u7406\u7684\u7ba1\u7406\u6570\u636e\u7f13\u51b2\u533a\u662f\u4fdd\u8bc1\u6570\u636e\u63a5\u6536\u53ef\u9760\u6027\u7684\u5173\u952e\u3002 <\/p>\n

                        \n
                      • \u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7f13\u51b2\u533a ：\u4f7f\u7528\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7f13\u51b2\u533a\u53ef\u4ee5\u7b80\u5316\u5185\u5b58\u7ba1\u7406，\u4f46\u9700\u8981\u5728\u8bbe\u8ba1\u65f6\u9884\u7559\u8db3\u591f\u7684\u7a7a\u95f4\u4ee5\u907f\u514d\u6ea2\u51fa\u3002 \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b： <\/li>\n<\/ul>\n

                        cpp const int BUFFER_SIZE = 1024; char buffer[BUFFER_SIZE]; int nBytesRead = m_Socket.Receive(buffer, BUFFER_SIZE); <\/p>\n

                          \n
                        • \u52a8\u6001\u8c03\u6574\u7684\u6570\u636e\u7f13\u51b2\u533a ：\u5bf9\u4e8e\u5927\u91cf\u7684\u6570\u636e\u4f20\u8f93，\u53ef\u4ee5\u4f7f\u7528\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u7684\u6570\u636e\u7f13\u51b2\u533a\u4ee5\u4f18\u5316\u5185\u5b58\u4f7f\u7528\u548c\u6027\u80fd\u3002 <\/li>\n<\/ul>\n

                          cpp \/\/ \u52a8\u6001\u8c03\u6574\u7f13\u51b2\u533a\u5927\u5c0f\u7684\u793a\u4f8b if (nBytesRead == BUFFER_SIZE) { char* largerBuffer = new char[BUFFER_SIZE * 2]; memcpy(largerBuffer, buffer, BUFFER_SIZE); delete[] buffer; buffer = largerBuffer; } <\/p>\n

                            \n
                          • \u7f13\u51b2\u533a\u6ea2\u51fa\u7684\u5904\u7406 ：\u4e3a\u4e86\u907f\u514d\u7f13\u51b2\u533a\u6ea2\u51fa，\u9700\u8981\u5bf9\u6570\u636e\u7684\u5927\u5c0f\u8fdb\u884c\u9002\u5f53\u7684\u68c0\u67e5，\u5e76\u5728\u5fc5\u8981\u65f6\u8c03\u6574\u7f13\u51b2\u533a\u5927\u5c0f\u3002 <\/li>\n<\/ul>\n

                            \u603b\u7ed3\u6765\u8bf4，\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u662f\u7f51\u7edc\u7f16\u7a0b\u4e2d\u7684\u6838\u5fc3\u73af\u8282，\u5408\u7406\u7684\u6570\u636e\u4f20\u8f93\u534f\u8bae\u8bbe\u8ba1\u3001\u9ad8\u6548\u7684\u53d1\u9001\u7b56\u7565\u4ee5\u53ca\u7cbe\u5fc3\u7ba1\u7406\u7684\u6570\u636e\u63a5\u6536\u6280\u672f，\u90fd\u662f\u786e\u4fdd\u6570\u636e\u901a\u4fe1\u8d28\u91cf\u7684\u5173\u952e\u56e0\u7d20\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u7ed3\u5408\u5177\u4f53\u7684\u4e1a\u52a1\u573a\u666f\u548c\u6027\u80fd\u8981\u6c42，\u7075\u6d3b\u8fd0\u7528\u4e0a\u8ff0\u6280\u672f\u8981\u70b9，\u5c06\u6709\u52a9\u4e8e\u6784\u5efa\u51fa\u7a33\u5b9a\u53ef\u9760\u7684\u7f51\u7edc\u901a\u4fe1\u7cfb\u7edf\u3002 <\/p>\n

                            6. \u7f51\u7edc\u7f16\u7a0b\u4e2d\u7684\u9519\u8bef\u5904\u7406 <\/h2>\n

                            6.1 \u9519\u8bef\u5904\u7406\u7684\u91cd\u8981\u6027 <\/h3>\n

                            6.1.1 \u9519\u8bef\u5904\u7406\u7b56\u7565\u7684\u8bbe\u8ba1\u539f\u5219 <\/h4>\n

                            \u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d，\u9519\u8bef\u5904\u7406\u662f\u4fdd\u8bc1\u7a0b\u5e8f\u5065\u58ee\u6027\u7684\u5173\u952e\u73af\u8282\u3002\u8bbe\u8ba1\u4e00\u4e2a\u597d\u7684\u9519\u8bef\u5904\u7406\u7b56\u7565\u6709\u52a9\u4e8e\u7ef4\u62a4\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027，\u540c\u65f6\u4e5f\u80fd\u591f\u63d0\u9ad8\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u548c\u7528\u6237\u6ee1\u610f\u5ea6\u3002\u9519\u8bef\u5904\u7406\u7b56\u7565\u5e94\u8be5\u9075\u5faa\u4ee5\u4e0b\u8bbe\u8ba1\u539f\u5219： <\/p>\n

                              \n
                            • \u9884\u89c1\u6027 : \u5728\u7f16\u7801\u8fc7\u7a0b\u4e2d\u5e94\u5f53\u9884\u89c1\u53ef\u80fd\u53d1\u751f\u7684\u9519\u8bef\u7c7b\u578b，\u5e76\u4e3a\u6b64\u51c6\u5907\u76f8\u5e94\u7684\u5904\u7406\u63aa\u65bd\u3002 <\/li>\n
                            • \u4e00\u81f4\u6027 : \u4e0d\u540c\u7684\u9519\u8bef\u5e94\u6709\u4e00\u81f4\u7684\u5904\u7406\u65b9\u5f0f，\u786e\u4fdd\u6574\u4e2a\u5e94\u7528\u5728\u9762\u5bf9\u9519\u8bef\u65f6\u80fd\u591f\u63d0\u4f9b\u7edf\u4e00\u7684\u54cd\u5e94\u3002 <\/li>\n
                            • \u6700\u5c0f\u5f71\u54cd : \u9519\u8bef\u5904\u7406\u4e0d\u5e94\u5bfc\u81f4\u7a0b\u5e8f\u72b6\u6001\u4e0d\u4e00\u81f4\u6216\u4ea7\u751f\u989d\u5916\u7684\u95ee\u9898\u3002 <\/li>\n
                            • \u6027\u80fd : \u9519\u8bef\u5904\u7406\u4e0d\u5e94\u8be5\u5bf9\u6027\u80fd\u4ea7\u751f\u663e\u8457\u7684\u8d1f\u9762\u5f71\u54cd\u3002 <\/li>\n<\/ul>\n

                              6.1.2 \u9519\u8bef\u65e5\u5fd7\u8bb0\u5f55\u4e0e\u8c03\u8bd5\u4fe1\u606f <\/h4>\n

                              \u4e3a\u4e86\u66f4\u597d\u5730\u8fdb\u884c\u9519\u8bef\u5904\u7406，\u8bb0\u5f55\u9519\u8bef\u65e5\u5fd7\u548c\u8c03\u8bd5\u4fe1\u606f\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u3002\u5728MFC\u4e2d，\u53ef\u4ee5\u901a\u8fc7\u91cd\u5199 CObject \u7c7b\u7684 Dump \u51fd\u6570，\u6216\u8005\u4f7f\u7528MFC\u63d0\u4f9b\u7684 AfxDebugOutput \u51fd\u6570\u8f93\u51fa\u8c03\u8bd5\u4fe1\u606f\u3002\u6b64\u5916，\u4f7f\u7528\u65e5\u5fd7\u6846\u67b6\u5982 log4cpp \u6216 spdlog \u80fd\u591f\u63d0\u4f9b\u66f4\u4e30\u5bcc\u548c\u7075\u6d3b\u7684\u65e5\u5fd7\u8bb0\u5f55\u529f\u80fd\u3002 <\/p>\n

                              6.2 \u9519\u8bef\u5904\u7406\u7684\u5b9e\u73b0\u65b9\u6cd5 <\/h3>\n

                              6.2.1 MFC\u63d0\u4f9b\u7684\u9519\u8bef\u5904\u7406\u673a\u5236 <\/h4>\n

                              MFC\u63d0\u4f9b\u4e86\u4e00\u4e9b\u57fa\u7840\u7684\u9519\u8bef\u5904\u7406\u673a\u5236，\u8fd9\u4e9b\u673a\u5236\u901a\u5e38\u4e0eWindows\u7684\u6d88\u606f\u7cfb\u7edf\u7d27\u5bc6\u96c6\u6210\u3002\u4f8b\u5982， CException \u7c7b\u53ca\u5176\u6d3e\u751f\u7c7b（\u5982 CFileException ）\u7528\u4e8e\u5904\u7406\u548c\u62a5\u544a\u5f02\u5e38\u3002\u6b64\u5916，MFC\u8fd8\u6709 AfxMessageBox \u51fd\u6570\u7528\u4e8e\u663e\u793a\u9519\u8bef\u6d88\u606f\u5bf9\u8bdd\u6846，\u5e2e\u52a9\u7528\u6237\u6216\u5f00\u53d1\u8005\u7406\u89e3\u9519\u8bef\u4fe1\u606f\u3002\u4e3a\u4e86\u5904\u7406\u7f51\u7edc\u76f8\u5173\u7684\u9519\u8bef，\u53ef\u4ee5\u4f7f\u7528 WSAGetLastError \u51fd\u6570\u83b7\u53d6Windows\u5957\u63a5\u5b57\u9519\u8bef\u4ee3\u7801，\u5e76\u901a\u8fc7 WSAGetLastError \u83b7\u53d6\u9519\u8bef\u63cf\u8ff0\u4fe1\u606f\u3002 <\/p>\n

                              \u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528 WSAGetLastError \u51fd\u6570\u7684\u4ee3\u7801\u793a\u4f8b： <\/p>\n

                              #include <winsock2.h>
                              \n#include <iostream><\/p>\n

                              #pragma comment(lib, "ws2_32.lib") \/\/ \u52a0\u8f7dwinsock\u5e93<\/p>\n

                              int main() {
                              \n WSADATA wsaData;
                              \n int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
                              \n if (iResult != 0) {
                              \n std::cerr << "WSAStartup failed: " << iResult << std::endl;
                              \n return 1;
                              \n }<\/p>\n

                              \/\/ \u5728\u6b64\u5904\u8fdb\u884c\u5957\u63a5\u5b57\u64cd\u4f5c…<\/p>\n

                              \/\/ \u5047\u8bbe\u67d0\u5904\u53d1\u751f\u9519\u8bef，\u83b7\u53d6\u9519\u8bef\u4ee3\u7801
                              \n int lastError = WSAGetLastError();
                              \n LPSTR messageBuffer;
                              \n FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
                              \n NULL, lastError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);
                              \n std::cout << "Last error: " << lastError << " " << messageBuffer << std::endl;<\/p>\n

                              \/\/ \u6e05\u7406winsock
                              \n WSACleanup();
                              \n LocalFree(messageBuffer);<\/p>\n

                              return 0;
                              \n}<\/p>\n

                              6.2.2 \u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\u6d41\u7a0b <\/h4>\n

                              \u867d\u7136MFC\u63d0\u4f9b\u7684\u9519\u8bef\u5904\u7406\u673a\u5236\u975e\u5e38\u5b9e\u7528，\u4f46\u5728\u5b9e\u9645\u7684\u7f51\u7edc\u7f16\u7a0b\u4e2d\u5f80\u5f80\u9700\u8981\u66f4\u52a0\u590d\u6742\u7684\u9519\u8bef\u5904\u7406\u6d41\u7a0b\u3002\u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\u6d41\u7a0b\u9700\u8981\u660e\u786e\u7684\u9519\u8bef\u5206\u7c7b，\u5982\u8fde\u63a5\u9519\u8bef\u3001\u6570\u636e\u5305\u9519\u8bef\u3001\u8d85\u65f6\u9519\u8bef\u7b49\u3002\u6bcf\u7c7b\u9519\u8bef\u90fd\u5e94\u8be5\u6709\u7279\u5b9a\u7684\u5904\u7406\u903b\u8f91，\u800c\u4e14\u5728\u51fa\u73b0\u5f02\u5e38\u65f6\u5e94\u8be5\u6709\u6e05\u6670\u7684\u9519\u8bef\u6062\u590d\u673a\u5236\u3002 <\/p>\n

                              \u4e0b\u9762\u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u9519\u8bef\u5904\u7406\u6d41\u7a0b\u7684\u4f2a\u4ee3\u7801\u793a\u4f8b： <\/p>\n

                              void HandleError(const std::string& errorMessage, int errorCode) {
                              \n switch (errorCode) {
                              \n case ERROR_CONNECTION_REFUSED:
                              \n \/\/ \u5904\u7406\u8fde\u63a5\u88ab\u62d2\u7edd\u7684\u9519\u8bef
                              \n break;
                              \n case ERROR_TIMEOUT:
                              \n \/\/ \u5904\u7406\u8d85\u65f6\u7684\u9519\u8bef
                              \n break;
                              \n default:
                              \n \/\/ \u9ed8\u8ba4\u5904\u7406\u5176\u4ed6\u6240\u6709\u9519\u8bef
                              \n break;
                              \n }<\/p>\n

                              \/\/ \u8bb0\u5f55\u9519\u8bef\u65e5\u5fd7
                              \n LogError(errorMessage, errorCode);
                              \n}<\/p>\n

                              void LogError(const std::string& message, int errorCode) {
                              \n \/\/ \u4ee5\u7279\u5b9a\u683c\u5f0f\u8bb0\u5f55\u9519\u8bef\u4fe1\u606f
                              \n \/\/ \u53ef\u4ee5\u5199\u5165\u6587\u4ef6\u3001\u53d1\u9001\u5230\u9519\u8bef\u76d1\u63a7\u7cfb\u7edf\u7b49
                              \n std::ofstream logFile("error_log.txt", std::ios::app);
                              \n logFile << "Error: " << errorCode << " Message: " << message << std::endl;
                              \n logFile.close();
                              \n}<\/p>\n

                              \u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d， HandleError \u51fd\u6570\u6839\u636e\u9519\u8bef\u4ee3\u7801\u5206\u7c7b\u5904\u7406\u4e0d\u540c\u7684\u9519\u8bef，\u5e76\u8c03\u7528 LogError \u51fd\u6570\u8bb0\u5f55\u9519\u8bef\u65e5\u5fd7\u3002\u8fd9\u79cd\u81ea\u5b9a\u4e49\u9519\u8bef\u5904\u7406\u6d41\u7a0b\u80fd\u591f\u63d0\u4f9b\u66f4\u7ec6\u81f4\u548c\u4e13\u95e8\u7684\u9519\u8bef\u5904\u7406\u7b56\u7565，\u662f\u6784\u5efa\u5065\u58ee\u7f51\u7edc\u5e94\u7528\u7684\u91cd\u8981\u73af\u8282\u3002 <\/p>\n

                              6.3 \u9519\u8bef\u5904\u7406\u7684\u6700\u4f73\u5b9e\u8df5 <\/h3>\n

                              6.3.1 \u9519\u8bef\u68c0\u67e5\u70b9 <\/h4>\n

                              \u5728\u4ee3\u7801\u7684\u5173\u952e\u90e8\u5206\u8bbe\u7f6e\u9519\u8bef\u68c0\u67e5\u70b9\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u8fd9\u4e9b\u68c0\u67e5\u70b9\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u6355\u6349\u5728\u8fd0\u884c\u65f6\u53ef\u80fd\u53d1\u751f\u7684\u9519\u8bef\u3002\u4f8b\u5982，\u5728\u8fde\u63a5\u670d\u52a1\u5668\u3001\u53d1\u9001\u6570\u636e\u548c\u63a5\u6536\u6570\u636e\u540e\u90fd\u5e94\u8be5\u8fdb\u884c\u9519\u8bef\u68c0\u67e5\u3002\u68c0\u67e5\u70b9\u53ef\u4ee5\u8bbe\u7f6e\u5728\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\u5757\u4e4b\u540e，\u6216\u8005\u5728\u8c03\u7528\u53ef\u80fd\u5931\u8d25\u7684API\u51fd\u6570\u4e4b\u540e\u3002 <\/p>\n

                              6.3.2 \u5f02\u5e38\u5b89\u5168\u6027 <\/h4>\n

                              \u5728\u8fdb\u884c\u7f51\u7edc\u7f16\u7a0b\u65f6，\u5f02\u5e38\u5b89\u5168\u6027\u662f\u786e\u4fdd\u5e94\u7528\u5065\u58ee\u6027\u7684\u4e00\u4e2a\u91cd\u8981\u65b9\u9762\u3002\u5f02\u5e38\u5b89\u5168\u6027\u610f\u5473\u7740\u5f53\u5f02\u5e38\u53d1\u751f\u65f6，\u7a0b\u5e8f\u80fd\u591f\u4fdd\u6301\u81ea\u8eab\u7684\u4e00\u81f4\u6027，\u5e76\u80fd\u591f\u5c06\u7a0b\u5e8f\u72b6\u6001\u6062\u590d\u5230\u4e00\u4e2a\u7a33\u5b9a\u7684\u70b9，\u4e0d\u4f1a\u7559\u4e0b\u534a\u751f\u4e0d\u719f\u7684\u6570\u636e\u6216\u8d44\u6e90\u6cc4\u9732\u3002MFC\u867d\u7136\u4e0d\u76f4\u63a5\u652f\u6301\u5f02\u5e38\u5b89\u5168\u6027，\u4f46\u662f\u53ef\u4ee5\u5229\u7528C++\u5f02\u5e38\u5904\u7406\u673a\u5236\u548cRAII（Resource Acquisition Is Initialization）\u539f\u5219\u6765\u63d0\u9ad8\u4ee3\u7801\u7684\u5f02\u5e38\u5b89\u5168\u6027\u3002 <\/p>\n

                              6.3.3 \u9519\u8bef\u6062\u590d\u7b56\u7565 <\/h4>\n

                              \u9519\u8bef\u6062\u590d\u7b56\u7565\u662f\u7f51\u7edc\u5e94\u7528\u4e2d\u975e\u5e38\u5173\u952e\u7684\u90e8\u5206，\u7279\u522b\u662f\u5728\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u7a0b\u5e8f\u4e2d\u3002\u5bf9\u4e8e\u4e00\u4e9b\u53ef\u4ee5\u901a\u8fc7\u91cd\u8bd5\u6216\u5176\u4ed6\u63aa\u65bd\u6062\u590d\u7684\u9519\u8bef，\u5e94\u5f53\u5236\u5b9a\u5408\u9002\u7684\u7b56\u7565\u3002\u4f8b\u5982，\u5728\u7f51\u7edc\u6682\u65f6\u4e0d\u53ef\u7528\u65f6，\u5ba2\u6237\u7aef\u53ef\u4ee5\u6682\u65f6\u9000\u907f\u540e\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5；\u5728\u8fde\u63a5\u8d85\u65f6\u7684\u60c5\u51b5\u4e0b，\u670d\u52a1\u5668\u7aef\u53ef\u4ee5\u8bb0\u5f55\u5931\u8d25\u5c1d\u8bd5，\u7136\u540e\u5728\u9002\u5f53\u7684\u65f6\u5019\u901a\u77e5\u5ba2\u6237\u7aef\u91cd\u65b0\u8fde\u63a5\u3002 <\/p>\n

                              \u5728\u603b\u7ed3\u9519\u8bef\u5904\u7406\u65f6，\u91cd\u8981\u7684\u662f\u8bb0\u4f4f\u9519\u8bef\u5904\u7406\u4e0d\u662f\u7b80\u5355\u7684\u8865\u4e01\u5de5\u4f5c，\u800c\u662f\u6574\u4e2a\u5e94\u7528\u8bbe\u8ba1\u548c\u5b9e\u73b0\u7684\u4e00\u90e8\u5206\u3002\u826f\u597d\u7684\u9519\u8bef\u5904\u7406\u7b56\u7565\u80fd\u591f\u5e2e\u52a9\u5f00\u53d1\u56e2\u961f\u51cf\u5c11\u7ef4\u62a4\u6210\u672c，\u63d0\u9ad8\u7a0b\u5e8f\u7684\u53ef\u9760\u6027\u548c\u7528\u6237\u4f53\u9a8c\u3002 <\/p>\n

                              7. \u5957\u63a5\u5b57\u5173\u95ed\u548c\u6e05\u7406\u8d44\u6e90 <\/h2>\n

                              7.1 \u5173\u95ed\u5957\u63a5\u5b57\u7684\u65f6\u673a\u4e0e\u65b9\u6cd5 <\/h3>\n

                              7.1.1 \u6b63\u786e\u5173\u95ed\u8fde\u63a5\u7684\u7b56\u7565 <\/h4>\n

                              \u6b63\u786e\u5173\u95ed\u5957\u63a5\u5b57\u8fde\u63a5\u662f\u7f51\u7edc\u7f16\u7a0b\u4e2d\u91cd\u8981\u7684\u73af\u8282，\u5c24\u5176\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d，\u4e00\u4e2a\u9519\u8bef\u7684\u5173\u95ed\u65f6\u673a\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8d44\u6e90\u6cc4\u9732\u6216\u7a0b\u5e8f\u5d29\u6e83\u3002\u5728\u5355\u7ebf\u7a0b\u5e94\u7528\u4e2d，\u901a\u5e38\u5728\u5ba2\u6237\u7aef\u6216\u670d\u52a1\u5668\u7aef\u51c6\u5907\u7ed3\u675f\u901a\u4fe1\u65f6\u8c03\u7528 CAsyncSocket::Close() \u65b9\u6cd5\u6765\u5173\u95ed\u5957\u63a5\u5b57\u3002\u4f46\u662f\u5728\u591a\u7ebf\u7a0b\u7684\u670d\u52a1\u5668\u4e2d，\u6bcf\u4e2a\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u901a\u5e38\u7531\u5355\u72ec\u7684\u7ebf\u7a0b\u5904\u7406\u3002\u56e0\u6b64，\u5173\u95ed\u8fde\u63a5\u7684\u7b56\u7565\u9700\u8981\u8c28\u614e\u3002 <\/p>\n

                              \u5173\u95ed\u8fde\u63a5\u524d，\u5e94\u786e\u4fdd\u5f53\u524d\u6ca1\u6709\u6570\u636e\u6b63\u5728\u53d1\u9001\u6216\u63a5\u6536\u3002\u53ef\u4ee5\u8c03\u7528 CAsyncSocket::Shutdown() \u65b9\u6cd5\u6765\u65ad\u5f00\u5957\u63a5\u5b57\u7684\u53d1\u9001\u6216\u63a5\u6536\u80fd\u529b，\u7136\u540e\u518d\u8c03\u7528 CAsyncSocket::Close() \u5b8c\u6210\u5173\u95ed\u64cd\u4f5c\u3002\u5173\u95ed\u5957\u63a5\u5b57\u540e，\u5e94\u4ece\u76f8\u5173\u7684\u4e8b\u4ef6\u6620\u5c04\u4e2d\u79fb\u9664\u8be5\u5957\u63a5\u5b57，\u907f\u514d\u63a5\u6536\u5230\u5df2\u7ecf\u5173\u95ed\u8fde\u63a5\u7684\u6d88\u606f\u3002 <\/p>\n

                              \/\/ \u5173\u95ed\u5957\u63a5\u5b57\u793a\u4f8b\u4ee3\u7801
                              \nvoid CMySocket::CloseConnection()
                              \n{
                              \n \/\/ \u9996\u5148\u5173\u95ed\u53d1\u9001\u548c\u63a5\u6536\u901a\u9053
                              \n m_socket.Shutdown(SHUT_RDWR);
                              \n \/\/ \u7136\u540e\u5173\u95ed\u5957\u63a5\u5b57
                              \n m_socket.Close();
                              \n}<\/p>\n

                              7.1.2 \u907f\u514d\u8d44\u6e90\u6cc4\u9732\u7684\u6280\u672f\u7ec6\u8282 <\/h4>\n

                              \u4e3a\u4e86\u907f\u514d\u8d44\u6e90\u6cc4\u9732，\u5e94\u5408\u7406\u7ba1\u7406\u5957\u63a5\u5b57\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u3002\u5f53\u4f7f\u7528\u52a8\u6001\u5206\u914d\u7684 CAsyncSocket \u5bf9\u8c61\u65f6，\u786e\u4fdd\u5728\u4e0d\u518d\u9700\u8981\u5957\u63a5\u5b57\u65f6\u8c03\u7528 delete \u3002MFC \u63d0\u4f9b\u4e86 CSocket::Destroy() \u65b9\u6cd5，\u8be5\u65b9\u6cd5\u5728\u5220\u9664\u5957\u63a5\u5b57\u5bf9\u8c61\u4e4b\u524d\u4f1a\u5148\u8c03\u7528 Close() ，\u4ece\u800c\u5141\u8bb8\u9002\u5f53\u7684\u6e05\u7406\u3002 <\/p>\n

                              \/\/ \u6b63\u786e\u7684\u8d44\u6e90\u6e05\u7406\u793a\u4f8b\u4ee3\u7801
                              \nvoid CMySocket::DestroySocket()
                              \n{
                              \n if (m_socket.GetSafeHandle() != INVALID_SOCKET)
                              \n {
                              \n m_socket.Close();
                              \n delete &m_socket;
                              \n }
                              \n}<\/p>\n

                              7.2 \u6e05\u7406\u8d44\u6e90\u7684\u81ea\u52a8\u5316\u7ba1\u7406 <\/h3>\n

                              7.2.1 \u5229\u7528MFC\u7684\u8d44\u6e90\u7ba1\u7406\u7c7b <\/h4>\n

                              MFC \u63d0\u4f9b\u4e86\u4e00\u4e9b\u8d44\u6e90\u7ba1\u7406\u7c7b，\u5982 CAutoVectorPtr ，\u5b83\u4eec\u53ef\u4ee5\u5e2e\u52a9\u81ea\u52a8\u5316\u8d44\u6e90\u7ba1\u7406，\u9632\u6b62\u5185\u5b58\u6cc4\u9732\u3002\u4f7f\u7528\u8fd9\u4e9b\u667a\u80fd\u6307\u9488\u7c7b\u53ef\u4ee5\u81ea\u52a8\u91ca\u653e\u8d44\u6e90，\u7b80\u5316\u8d44\u6e90\u7ba1\u7406\u3002 <\/p>\n

                              \/\/ \u5229\u7528CAutoVectorPtr\u81ea\u52a8\u5316\u7ba1\u7406\u5957\u63a5\u5b57\u6570\u7ec4
                              \nCAutoVectorPtr<CAsyncSocket> pSockets(new CAsyncSocket[NUMBER_OF_SOCKETS]);
                              \n\/\/ \u5f53pSockets\u79bb\u5f00\u4f5c\u7528\u57df\u65f6，\u6790\u6784\u51fd\u6570\u81ea\u52a8\u8c03\u7528delete[]\u6765\u91ca\u653e\u5185\u5b58<\/p>\n

                              7.2.2 \u5b9e\u73b0\u4f18\u96c5\u7684\u7a0b\u5e8f\u9000\u51fa\u6d41\u7a0b <\/h4>\n

                              \u4f18\u96c5\u7684\u7a0b\u5e8f\u9000\u51fa\u6d41\u7a0b\u9700\u8981\u786e\u4fdd\u5728\u7a0b\u5e8f\u7ec8\u6b62\u524d，\u6240\u6709\u7684\u5957\u63a5\u5b57\u8fde\u63a5\u90fd\u5df2\u7ecf\u88ab\u6b63\u786e\u5173\u95ed，\u5e76\u4e14\u91ca\u653e\u4e86\u6240\u6709\u76f8\u5173\u8d44\u6e90\u3002\u8fd9\u901a\u5e38\u6d89\u53ca\u5230\u76d1\u542c\u9000\u51fa\u4e8b\u4ef6，\u5e76\u5728\u4e8b\u4ef6\u89e6\u53d1\u65f6，\u904d\u5386\u5e76\u5173\u95ed\u6240\u6709\u6d3b\u8dc3\u7684\u5957\u63a5\u5b57\u8fde\u63a5\u3002 <\/p>\n

                              \/\/ \u7a0b\u5e8f\u9000\u51fa\u65f6\u6e05\u7406\u6240\u6709\u6d3b\u8dc3\u5957\u63a5\u5b57\u8fde\u63a5
                              \nvoid CMyApp::ExitInstance()
                              \n{
                              \n \/\/ \u5047\u8bbem_sockets\u662f\u4e00\u4e2a\u5305\u542b\u6240\u6709\u6d3b\u8dc3\u5957\u63a5\u5b57\u7684CAsyncSocket\u6570\u7ec4
                              \n for (int i = 0; i < m_sockets.GetSize(); i++)
                              \n {
                              \n m_sockets[i].Close();
                              \n }
                              \n CWinApp::ExitInstance();
                              \n}<\/p>\n

                              7.3 \u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u7684\u8d44\u6e90\u7ba1\u7406 <\/h3>\n

                              7.3.1 \u7ebf\u7a0b\u540c\u6b65\u673a\u5236\u4e0e\u8d44\u6e90\u4fdd\u62a4 <\/h4>\n

                              \u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b，\u786e\u4fdd\u5957\u63a5\u5b57\u8d44\u6e90\u7684\u5b89\u5168\u8bbf\u95ee\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u8fd9\u901a\u5e38\u901a\u8fc7\u4f7f\u7528\u540c\u6b65\u673a\u5236\u5982\u4e92\u65a5\u9501（MFC \u4e2d\u7684 CMutex \u6216 CCriticalSection ）\u6765\u5b9e\u73b0\u3002\u5f53\u591a\u4e2a\u7ebf\u7a0b\u9700\u8981\u8bbf\u95ee\u540c\u4e00\u5957\u63a5\u5b57\u8d44\u6e90\u65f6，\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u540c\u6b65\u673a\u5236\u6765\u907f\u514d\u7ade\u6001\u6761\u4ef6\u548c\u8d44\u6e90\u51b2\u7a81\u3002 <\/p>\n

                              \/\/ \u4f7f\u7528CCriticalSection\u6765\u4fdd\u62a4\u5957\u63a5\u5b57\u8d44\u6e90
                              \nCCriticalSection critSec;<\/p>\n

                              void ThreadFunction(CAsyncSocket* pSocket)
                              \n{
                              \n critSec.Lock();
                              \n \/\/ \u6267\u884c\u5bf9\u5957\u63a5\u5b57\u7684\u64cd\u4f5c
                              \n critSec.Unlock();
                              \n}<\/p>\n

                              7.3.2 \u5728\u591a\u7ebf\u7a0b\u95f4\u5171\u4eab\u5957\u63a5\u5b57\u8d44\u6e90\u7684\u5b89\u5168\u7b56\u7565 <\/h4>\n

                              \u5728\u591a\u7ebf\u7a0b\u670d\u52a1\u5668\u4e2d，\u5171\u4eab\u5957\u63a5\u5b57\u8d44\u6e90\u9700\u8981\u7279\u522b\u5c0f\u5fc3\u3002\u53ef\u4ee5\u91c7\u7528\u5171\u4eab\u6307\u9488（\u5982 std::shared_ptr ）\u6765\u7ba1\u7406\u5957\u63a5\u5b57\u5bf9\u8c61，\u786e\u4fdd\u5f53\u6700\u540e\u4e00\u4e2a\u5f15\u7528\u88ab\u5220\u9664\u65f6，\u5957\u63a5\u5b57\u8d44\u6e90\u88ab\u9002\u5f53\u6e05\u7406\u3002\u540c\u65f6，\u786e\u4fdd\u7ebf\u7a0b\u5b89\u5168\u5730\u63a5\u6536\u548c\u5904\u7406\u4e8b\u4ef6\u3002 <\/p>\n

                              \/\/ \u4f7f\u7528std::shared_ptr\u5171\u4eab\u5957\u63a5\u5b57\u8d44\u6e90
                              \nstd::shared_ptr<CAsyncSocket> pSharedSocket(new CAsyncSocket);<\/p>\n

                              \/\/ \u5728\u4e0d\u540c\u7684\u7ebf\u7a0b\u4e2d\u5b89\u5168\u5730\u4f7f\u7528\u5171\u4eab\u5957\u63a5\u5b57
                              \nvoid ThreadFunction()
                              \n{
                              \n CAsyncSocket* pSocket = pSharedSocket.get();
                              \n \/\/ \u4f7f\u7528pSocket\u8fdb\u884c\u64cd\u4f5c…
                              \n}<\/p>\n

                              \u901a\u8fc7\u4e0a\u8ff0\u7b56\u7565，\u53ef\u4ee5\u786e\u4fdd\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u7684\u5957\u63a5\u5b57\u8d44\u6e90\u5f97\u5230\u59a5\u5584\u7ba1\u7406，\u4ece\u800c\u907f\u514d\u6f5c\u5728\u7684\u8d44\u6e90\u6cc4\u9732\u548c\u7ade\u4e89\u6761\u4ef6\u3002 <\/p>\n

                              \u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 \"menu-r.4af5f7ec.gif\" <\/p>\n

                              \u7b80\u4ecb：\u7f51\u7edc\u7f16\u7a0b\u5bf9IT\u884c\u4e1a\u81f3\u5173\u91cd\u8981，MFC\u5e93\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u4fbf\u65b9\u5f0f\u5904\u7406Windows\u5e73\u53f0\u7684\u5957\u63a5\u5b57\u901a\u4fe1\u3002\u672c\u5b9e\u4f8b\u5c06\u5f15\u5bfc\u4f60\u4e86\u89e3\u5982\u4f55\u4f7f\u7528CAsyncSocket\u7c7b\u5728Visual Studio 2008\u73af\u5883\u4e2d\u6784\u5efa\u4e00\u4e2a\u57fa\u7840\u7684\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u901a\u4fe1\u7cfb\u7edf\u3002\u4f60\u5c06\u5b66\u4e60\u521b\u5efa\u548c\u76d1\u542c\u670d\u52a1\u5668\u7aef，\u4ee5\u53ca\u5ba2\u6237\u7aef\u5982\u4f55\u8fde\u63a5\u670d\u52a1\u5668，\u5e76\u5904\u7406\u6570\u636e\u4f20\u8f93\u548c\u7f51\u7edc\u9519\u8bef\u3002\u540c\u65f6，\u4f60\u5c06\u638c\u63e1\u5173\u95ed\u548c\u6e05\u7406\u8d44\u6e90\u7684\u6b63\u786e\u65b9\u6cd5，\u5e76\u53ef\u6269\u5c55\u5230\u591a\u7ebf\u7a0b\u5904\u7406\u4ee5\u63d0\u9ad8\u5e76\u53d1\u6027\u3002 <\/p>\n

                              \u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 \"menu-r.4af5f7ec.gif\" <\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

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