class CPageLoader
{
	enum
	{
		PORT_NO = 80
	};

	SOCKET m_uiSocket;
public:
	CPageLoader()
		: m_uiSocket( 0 )
	{
		WSAData stData;
		int iErr
			= WSAStartup( MAKEWORD( 1, 0 ), &stData );
		if( iErr != 0 )
			OutputError();
		m_uiSocket = socket( PF_INET, SOCK_STREAM, 0 );
		if( m_uiSocket == INVALID_SOCKET )
			OutputError();
	}

	~CPageLoader()
	{
		closesocket( m_uiSocket );
		WSACleanup();
	}

	void Load
		( const char *const p_pchUrl
		, const char *const p_pchLoadFile
		, std::ostream &p_rcOStrm )
	{
		DWORD dwIp
			= GetIpAddress( p_pchUrl );
		Connect( dwIp );
		Loop( p_pchLoadFile, p_rcOStrm );
	}

private:
	DWORD GetIpAddress(  const char *const p_pchUrl )
	{
		DWORD dwIp
			= inet_addr( p_pchUrl );	//ドット形式のアドレスをIPアドレスへ変換。
		if( dwIp != INADDR_NONE )	//うまくいったら
			return dwIp;	//そのまま返します。
		//	うまくいかなかったら変換。		
		hostent* pstHost;
		pstHost = gethostbyname( p_pchUrl );	//ホスト名から IP アドレスに変換。
		if( pstHost == NULL ) 
			OutputError();

		return *( reinterpret_cast< DWORD * >( pstHost->h_addr ) );
	}

	void Connect( DWORD p_dwIp )
	{
		SOCKADDR_IN stAddr;
		stAddr.sin_family = AF_INET;	//TCP/IPを選択
		stAddr.sin_port = htons( PORT_NO );	//ポートの指定
		stAddr.sin_addr.s_addr = p_dwIp;	//IPアドレスの指定
		int iErr
			= connect( m_uiSocket, (const struct sockaddr*)&stAddr, sizeof( stAddr ) );
		if( iErr != 0 )
			OutputError();
	}

	void Loop( const char *const p_pchFile, std::ostream &p_rcOStrm )
	{
		char pchGetComm[256];
		sprintf( pchGetComm, "GET %s\n", p_pchFile );
		int iRes
			= send( m_uiSocket, pchGetComm, strlen( pchGetComm ), 0 );
		if( iRes == SOCKET_ERROR )
			OutputError();
		int iSize = 0;
		char buf[4096];
		while( 1 )
		{
			iSize = recv( m_uiSocket, buf, 4095, 0 );	//ここで止まる……。
			if( iSize == 0 )
				break;
			if( iSize == SOCKET_ERROR )
				OutputError();

			buf[iSize] = '\0';
			p_rcOStrm
				<< buf
				<< std::flush;
		}
	}

	void OutputError()
	{
		throw( WSAGetLastError() );
	}
};

void Test()
{
	CPageLoader cPageLoader;
	std::fstream cFStrm( "Output.txt", std::ios::out );
	cPageLoader.Load( "www.justnet.ne.jp", "/index.html", cFStrm );
}