www.pudn.com > duanxinfangwei.rar > BLOCKSOCK.CPP

// blocksock.cpp (CMyBlockSocketException, CMyBlockSocket, CMyHttpBlockSocket) 
#include  
#include "blocksock.h" 
 
// Class CMyBlockSocketException 
IMPLEMENT_DYNAMIC(CMyBlockSocketException, CException) 
 
CMyBlockSocketException::CMyBlockSocketException(char* pchMessage) 
{ 
	m_strMessage = pchMessage; 
	m_nError = WSAGetLastError(); 
} 
 
BOOL CMyBlockSocketException::GetErrorMessage(LPTSTR lpstrError, UINT nMaxError, 
		PUINT pnHelpContext /*= NULL*/) 
{ 
 
	char text[200]; 
	if(m_nError == 0) { 
		wsprintf(text, "%s 错误", (const char*) m_strMessage); 
	} 
	else { 
		wsprintf(text, "%s   错误号：#%d", (const char*) m_strMessage, m_nError); 
	} 
	strncpy(lpstrError, text, nMaxError - 1); 
	return TRUE; 
} 
 
// Class CMyBlockSocket 
IMPLEMENT_DYNAMIC(CMyBlockSocket, CObject) 
 
void CMyBlockSocket::Cleanup() 
{ 
	if(m_hSocket == NULL) return; 
	VERIFY(closesocket(m_hSocket) != SOCKET_ERROR); 
	m_hSocket = NULL; 
} 
 
void CMyBlockSocket::Create(int nType /* = SOCK_STREAM */) 
{ 
	ASSERT(m_hSocket == NULL); 
	if((m_hSocket = socket(AF_INET, nType, 0)) == INVALID_SOCKET) { 
		throw new CMyBlockSocketException("创建套接字(Create)"); 
	} 
} 
 
void CMyBlockSocket::Bind(LPCSOCKADDR psa) 
{ 
	ASSERT(m_hSocket != NULL); 
	if(bind(m_hSocket, psa, sizeof(SOCKADDR)) == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("绑定地址(Bind)"); 
	} 
} 
 
void CMyBlockSocket::Listen() 
{ 
	ASSERT(m_hSocket != NULL); 
	if(listen(m_hSocket, 5) == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("侦听连接(Listen)"); 
	} 
} 
 
BOOL CMyBlockSocket::Accept(CMyBlockSocket& sConnect, LPSOCKADDR psa) 
{ 
	ASSERT(m_hSocket != NULL); 
	ASSERT(sConnect.m_hSocket == NULL); 
	int nLengthAddr = sizeof(SOCKADDR); 
	sConnect.m_hSocket = accept(m_hSocket, psa, &nLengthAddr); 
	if(sConnect == INVALID_SOCKET) { 
		if(WSAGetLastError() != WSAEINTR) { 
			throw new CMyBlockSocketException("接受连接(Accept)"); 
		} 
		return FALSE; 
	} 
	return TRUE; 
} 
 
void CMyBlockSocket::Close() 
{ 
	ASSERT(m_hSocket != NULL); 
	if(closesocket(m_hSocket) == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("关闭套接字(Close)"); 
	} 
	m_hSocket = NULL; 
} 
 
void CMyBlockSocket::Connect(LPCSOCKADDR psa) 
{ 
	ASSERT(m_hSocket != NULL); 
	if(connect(m_hSocket, psa, sizeof(SOCKADDR)) == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("发送连接(Connect)"); 
	} 
} 
 
int CMyBlockSocket::Write(const char* pch, const int nSize, const int nSecs) 
{ 
	int nBytesSent = 0; 
	int nBytesThisTime; 
	const char* pch1 = pch; 
	do { 
		nBytesThisTime = Send(pch1, nSize - nBytesSent, nSecs); 
		nBytesSent += nBytesThisTime; 
		pch1 += nBytesThisTime; 
	} while(nBytesSent < nSize); 
	return nBytesSent; 
} 
 
int CMyBlockSocket::Send(const char* pch, const int nSize, const int nSecs) 
{ 
	ASSERT(m_hSocket != NULL); 
	FD_SET fd = {1, m_hSocket}; 
	TIMEVAL tv = {nSecs, 0}; 
	if(select(0, NULL, &fd, NULL, &tv) == 0) { 
		throw new CMyBlockSocketException("发送超时(Send timeout)"); 
	} 
	int nBytesSent; 
	if((nBytesSent = send(m_hSocket, pch, nSize, 0)) == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("发送数据(Send)"); 
	} 
	return nBytesSent; 
} 
 
int CMyBlockSocket::Receive(char* pch, const int nSize, const int nSecs) 
{ 
	ASSERT(m_hSocket != NULL); 
	FD_SET fd = {1, m_hSocket}; 
	TIMEVAL tv = {nSecs, 0}; 
	if(select(0, &fd, NULL, NULL, &tv) == 0) { 
		throw new CMyBlockSocketException("接收超时(Receive timeout)"); 
	} 
 
	int nBytesReceived; 
	if((nBytesReceived = recv(m_hSocket, pch, nSize, 0)) == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("接收数据(Receive)"); 
	} 
	return nBytesReceived; 
} 
 
int CMyBlockSocket::ReceiveDatagram(char* pch, const int nSize, LPSOCKADDR psa, const int nSecs) 
{ 
	ASSERT(m_hSocket != NULL); 
	FD_SET fd = {1, m_hSocket}; 
	TIMEVAL tv = {nSecs, 0}; 
	if(select(0, &fd, NULL, NULL, &tv) == 0) { 
		throw new CMyBlockSocketException("接收超时(Receive timeout)"); 
	} 
 
	int nFromSize = sizeof(SOCKADDR); 
	int nBytesReceived = recvfrom(m_hSocket, pch, nSize, 0, psa, &nFromSize); 
	if(nBytesReceived == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("接收数据报(ReceiveDatagram)"); 
	} 
	return nBytesReceived; 
} 
 
int CMyBlockSocket::SendDatagram(const char* pch, const int nSize, LPCSOCKADDR psa, const int nSecs) 
{ 
	ASSERT(m_hSocket != NULL); 
	FD_SET fd = {1, m_hSocket}; 
	TIMEVAL tv = {nSecs, 0}; 
	if(select(0, NULL, &fd, NULL, &tv) == 0) { 
		throw new CMyBlockSocketException("发送超时(Send timeout)"); 
	} 
 
	int nBytesSent = sendto(m_hSocket, pch, nSize, 0, psa, sizeof(SOCKADDR)); 
	if(nBytesSent == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("发送数据报(SendDatagram)"); 
	} 
	return nBytesSent; 
} 
 
void CMyBlockSocket::GetPeerAddr(LPSOCKADDR psa) 
{ 
	ASSERT(m_hSocket != NULL); 
	int nLengthAddr = sizeof(SOCKADDR); 
	if(getpeername(m_hSocket, psa, &nLengthAddr) == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("获得对方地址(GetPeerName)"); 
	} 
} 
 
void CMyBlockSocket::GetSockAddr(LPSOCKADDR psa) 
{ 
	ASSERT(m_hSocket != NULL); 
	int nLengthAddr = sizeof(SOCKADDR); 
	if(getsockname(m_hSocket, psa, &nLengthAddr) == SOCKET_ERROR) { 
		throw new CMyBlockSocketException("获得本方地址(GetSockName)"); 
	} 
} 
 
CSocketAddress CMyBlockSocket::GetHostByName(const char* pchName, const USHORT ushPort /* = 0 */) 
{ 
	hostent* pHostEnt = gethostbyname(pchName); 
	if(pHostEnt == NULL) { 
		throw new CMyBlockSocketException("通过名字查找主机(GetHostByName)"); 
	} 
	ULONG* pulAddr = (ULONG*) pHostEnt->h_addr_list[0]; 
	SOCKADDR_IN sockTemp; 
	sockTemp.sin_family = AF_INET; 
	sockTemp.sin_port = htons(ushPort); 
	sockTemp.sin_addr.s_addr = *pulAddr; 
	return sockTemp; 
} 
 
const char* CMyBlockSocket::GetHostByAddr(LPCSOCKADDR psa) 
{ 
	hostent* pHostEnt = gethostbyaddr((char*) &((LPSOCKADDR_IN) psa) 
				->sin_addr.s_addr, 4, PF_INET); 
	if(pHostEnt == NULL) { 
		throw new CMyBlockSocketException("通过地址查找主机(GetHostByAddr)"); 
	} 
	return pHostEnt->h_name; 
} 
 
// Class CMyHttpBlockSocket 
IMPLEMENT_DYNAMIC(CMyHttpBlockSocket, CMyBlockSocket) 
 
CMyHttpBlockSocket::CMyHttpBlockSocket() 
{ 
	m_pReadBuf = new char[nSizeRecv]; 
	m_nReadBuf = 0; 
} 
 
CMyHttpBlockSocket::~CMyHttpBlockSocket() 
{ 
	delete [] m_pReadBuf; 
} 
 
//读取整个头信息，并在结尾加上字符串的结束标志 
int CMyHttpBlockSocket::ReadHttpHeaderLine(char* pch, const int nSize, const int nSecs) 
{ 
	int nBytesThisTime = m_nReadBuf; 
	int nLineLength = 0; 
	char* pch1 = m_pReadBuf; 
	char* pch2; 
	do { 
		if((pch2 = (char*) memchr(pch1 , '\n', nBytesThisTime)) != NULL) { 
			ASSERT((pch2) > m_pReadBuf); 
			ASSERT(*(pch2 - 1) == '\r'); 
			nLineLength = (pch2 - m_pReadBuf) + 1; 
			if(nLineLength >= nSize) nLineLength = nSize - 1; 
			memcpy(pch, m_pReadBuf, nLineLength); 
			m_nReadBuf -= nLineLength; 
			memmove(m_pReadBuf, pch2 + 1, m_nReadBuf); 
			break; 
		} 
		pch1 += nBytesThisTime; 
		nBytesThisTime = Receive(m_pReadBuf + m_nReadBuf, nSizeRecv - m_nReadBuf, nSecs); 
		if(nBytesThisTime <= 0) { 
			throw new CMyBlockSocketException("获取头部信息(ReadHeaderLine)"); 
		} 
		m_nReadBuf += nBytesThisTime; 
	} 
	while(TRUE); 
	*(pch + nLineLength) = '\0'; 
	return nLineLength; 
} 
 
//读取传输的信息的其它部分(假定头信息已经读取了) 
int CMyHttpBlockSocket::ReadHttpResponse(char* pch, const int nSize, const int nSecs) 
{ 
	int nBytesToRead, nBytesThisTime, nBytesRead = 0; 
	if(m_nReadBuf > 0) { 
		memcpy(pch, m_pReadBuf, m_nReadBuf); 
		pch += m_nReadBuf; 
		nBytesRead = m_nReadBuf; 
		m_nReadBuf = 0; 
	} 
	do { 
		nBytesToRead = min(nSizeRecv, nSize - nBytesRead); 
		nBytesThisTime = Receive(pch, nBytesToRead, nSecs); 
		if(nBytesThisTime <= 0) break; 
		pch += nBytesThisTime; 
		nBytesRead += nBytesThisTime; 
	} 
	while(nBytesRead <= nSize); 
	return nBytesRead; 
}