cgihandler.cpp

一个c++实现的acd的例子。 ----ACDCommandListener.cpp ---ACDCommandListenerThread.cpp ---ACDConfig.cpp ---a

string Decode( const string& str, bool bQuery )
{
	int index;
	string strDecoded = str;
	// special processing or query strings....
	if ( bQuery )
	{
		// change all '+' to ' '....
		while( (index=strDecoded.Find('+')) != -1 )
			strDecoded = strDecoded.Left(index) + ' ' + strDecoded.Mid(index+1);
	}

	// first see if there are any %s to decode....
	if ( strDecoded.Find( '%' ) != -1 )
	{
		// iterate through the string, changing %dd to special char....
		for( index=0; index < strDecoded.GetLength(); index++ )
		{
			char ch = strDecoded.GetAt( index );
			if ( ch == '%' )
			{
				if ( strDecoded.GetAt( index+1 ) == '%' )
				{
					// wanna keep one percent sign....
					strDecoded = strDecoded.Left(index) + strDecoded.Mid(index+1);
				}
				else
				{
					// assume we have a hex value....
					char ch1 = strDecoded.GetAt(index+1);
					char ch2 = strDecoded.GetAt(index+2);
					ch1 = ch1 >= 'A' ? (ch1&0xdf)-'A' : ch1-'0';
					ch2 = ch2 >= 'A' ? (ch2&0xdf)-'A' : ch2-'0';
					// replace the escape sequence with the char....
					strDecoded = strDecoded.Left(index)
						+ (char)(ch1*16 + ch2)
						+ strDecoded.Mid( index+3 );
				}
			}
		}
	}
	return strDecoded;
}

CgiHandler::CgiHandler()
{
#ifdef IMPL_CGI
	m_pThread = NULL;
	m_pCancel = NULL;
#endif // IMPL_CGI
}

CgiHandler::~CgiHandler ()
{
#ifdef IMPL_CGI
	if ( m_pCancel )
	{
		if ( m_pThread )
		{
			DWORD dwCode;
			// signal a cancel if still running....
			if ( ::GetExitCodeThread( m_pThread->m_hThread, &dwCode )
				&& dwCode == STILL_ACTIVE )
			{
				// signal a cancel....
				m_pCancel->SetEvent();
				// wait for the thread to die....
				WaitForSingleObject( m_pThread->m_hThread, INFINITE );
			}
			// kill the object...
			delete m_pThread;
		}
		delete m_pCancel;
	}
#endif // IMPL_CGI

}





bool CgiHandler::StartSvrApp( void )
{
#ifdef IMPL_CGI
	if ( m_pRequest->m_dwExecute != CRequest::APP_ISAPI )
		return CGIStart();
	else
	{
		StuffError( IDS_STATUS_NOTIMPL );
		return FALSE;
	}
#else //  IMPL_CGI
	StuffError( IDS_STATUS_NOTIMPL );
	return FALSE;
#endif // IMPL_CGI
}


int CgiHandler::StuffString( const string& strData )
{
	int nLen = strData.GetLength()*sizeof(TCHAR);
	// make sure there's enough room....
	if ( m_cbOut + nLen > m_buf.GetSize() )
	{
		int nChunks = nLen/1024 + 1;
		m_buf.SetSize( m_cbOut + nChunks*1024 );
	}
	// copy the data....
	MoveMemory( m_buf.GetData() + m_cbOut, (LPCSTR)strData, nLen );
	m_cbOut += nLen;
	// return amount of space left....
	return (m_buf.GetSize() - m_cbOut);
}

int CgiHandler::StuffString( UINT uId )
{
	string str;
	str.LoadString( uId );
	return StuffString( str );
}

int CgiHandler::StuffStatus( const string& strStatus )
{
	string strVer = "HTTP/1.0 ";
	StuffString( strVer );
	StuffString( strStatus );
	StuffString( CRLF );

	// stuff the server name....
	string strServer;
	if ( strServer.LoadString( IDS_SERVER_NAME ) && !strServer.IsEmpty() )
		StuffHeader( "Server", strServer );

	// stuff the date....
	return StuffHeader( "Date", GetHttpDate() );
}

int CgiHandler::StuffStatus( UINT uStatus )
{
	string strStatus;
	strStatus.LoadString( uStatus );
	// save the status for this request....
	m_pRequest->m_uStatus = uStatus;
	// stuff the HTTP status line....
	return StuffStatus( strStatus );
}

int CgiHandler::StuffError( UINT uMsg )
{
	StuffStatus( uMsg );
	return StuffString( CRLF );
}

int CgiHandler::StuffHeader( string strName, string strValue )
{
	StuffString( strName );
	StuffString( ": " );
	StuffString( strValue );
	return StuffString( CRLF );
}

int CgiHandler::StuffHeader( string strName, int nValue )
{
	string strValue;
	StuffString( strName );
	StuffString( ": " );
	strValue.Format( "%d", nValue );
	StuffString( strValue );
	return StuffString( CRLF );
}

bool CgiHandler::StuffHeading( void )
{
	bool bContinue = FALSE;
	if ( m_pRequest->m_dwAttr & FILE_ATTRIBUTE_HIDDEN )
	{
		// never show hidden files....
		StuffError( IDS_STATUS_FORBIDDEN );
	}
	else if ( m_pRequest->m_dwAttr & FILE_ATTRIBUTE_DIRECTORY )
	{
		if ( m_pDoc->m_bAllowListing )
		{
			// create a directory listing....
			StuffStatus( IDS_STATUS_OK );
			StuffString( CRLF );
			bContinue = TRUE;
		}
		else
			StuffError( IDS_STATUS_FORBIDDEN );
	}
#ifdef IMPL_CGI
	else if ( m_hFile != INVALID_HANDLE_VALUE )
	{
		// cgi's output file will be opened already....
		string strStatus, strHeaders;
		// loop until we find a blank line....
		DWORD dwRead = 0;
		CByteArray baFile;
		baFile.SetSize( 1024 );
		// read next chunk....
		bool bRead = ReadFile( m_hFile, baFile.GetData(),
			baFile.GetSize(), &dwRead, NULL );
		while ( dwRead > 0 )
		{
			int index = 0;
			while( GetLine( baFile, dwRead, index ) == TRUE )
			{
				bool bSave = TRUE;
				// stuff any non-empty lines.....
				if ( m_strLine.IsEmpty() )
				{
					// we found our empty line;
					// back up to where we left off....
					DWORD dwPos = SetFilePointer( m_hFile,
						index - dwRead,
						NULL, FILE_CURRENT );

					// and we're off....
					bContinue = TRUE;
					break;
				}
				else
				{
					int nPos = m_strLine.Find( ':' );
					if ( nPos != -1 )
					{
						string strName = m_strLine.Left( nPos );
						strName.TrimLeft();
						strName.TrimRight();
						string strVal  = m_strLine.Mid( nPos+1 );
						strVal.TrimLeft();
						strVal.TrimRight();
						if ( strName.CompareNoCase("Status") == 0 )
						{
							strStatus = strVal;
							bSave = FALSE;
						}
						else if ( strName.CompareNoCase("Location") == 0 )
						{
							strStatus.LoadString( IDS_STATUS_MOVEDTEMP );
						}
					}
				}

				// save the header (if we want to)....
				if ( bSave )
					strHeaders += m_strLine + CRLF;

				m_strLine.Empty();
			}
			// read next chunk if we're not done....
			if ( bContinue )
				break;
			else
				ReadFile( m_hFile, baFile.GetData(),
					baFile.GetSize(), &dwRead, NULL );
		}
		if ( strStatus.IsEmpty() )
			StuffStatus( IDS_STATUS_OK );
		else
			StuffStatus( strStatus );

		// stuff the headers....
		StuffString( strHeaders );
		// stuff the blank line....
		StuffString( CRLF );
	}
#endif // IMPL_CGI
	else
	{
		// open the file....
		m_hFile = CreateFile( m_pRequest->m_strFullPath,
			GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
			FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,
			NULL );
		if ( m_hFile != INVALID_HANDLE_VALUE )
		{
			if ( m_reqStatus != REQ_SIMPLE )
			{
				CTime timeIfMod;
				string strIfMod = m_pRequest->GetHeaderValue( "If-Modified-Since" );
				if ( strIfMod.GetLength() > 0 &&
					FromHttpTime( strIfMod, timeIfMod ) &&
					!IfModSince( timeIfMod ) )
				{
					// eh, it hasn't been modified....
					StuffStatus( IDS_STATUS_NOTMODIFIED );
					// don't need it anymore....
					CloseHandle( m_hFile );
					m_hFile = INVALID_HANDLE_VALUE;
				}
				else
				{
					// send it off....
					StuffStatus( IDS_STATUS_OK );
					// any other header info....
					StuffFileType();
					StuffHeader( "Content-length", GetFileSize( m_hFile, NULL ) );
					// get the last modified time....
					FILETIME ft;
					if ( GetFileTime( m_hFile, NULL, NULL, &ft ) )
					{
						StuffHeader( "Last-Modified", GetHttpDate( &ft ) );
					}
					bContinue = TRUE;
				}
				// blank line....
				StuffString( CRLF );
			}
			else
				bContinue = TRUE;
		}
		else
		{
			// couldn't open; try again later....
			StuffError( IDS_STATUS_SVCUNAVAIL );
		}
	}
	return bContinue;
}

void CgiHandler::StartTargetStuff( void )
{
	if ( m_hFile != INVALID_HANDLE_VALUE)
	{
		DWORD dwRead = 0;
		// read the first chunk....
		ReadFile( m_hFile, m_buf.GetData() + m_cbOut,
			m_buf.GetSize()-m_cbOut, &dwRead, NULL );
		if ( dwRead > 0 )
			m_cbOut += dwRead;
		else
		{
			// nothing read.... close the file....
			CloseHandle( m_hFile );
			m_hFile = INVALID_HANDLE_VALUE;
		}
	}
	else if ( m_pRequest->m_dwAttr & FILE_ATTRIBUTE_DIRECTORY )
		StuffListing();
	else
		StuffString( CRLF );
}

void CgiHandler::StuffListing( void )
{
	bool bRoot = FALSE;
	bool bIcons = m_pDoc->m_bListIcon;
	string strIcon;
	string strLine = string("http://")
		+ m_pDoc->m_strServer
		+ m_pRequest->m_strURL;
	string strDir = m_pRequest->m_strURL;
	string strMask = m_pRequest->m_strFullPath;

	// make sure URL ends in a slash....
	if ( strDir.GetAt( strDir.GetLength()-1 ) != '/' )
		strDir += '/';
	// is this the server's root folder?
	else if ( strDir.Compare( "/" ) == 0 )
		bRoot = TRUE;