wddn.cpp

1）动态加载中间（2）规范化中间层接口 （3）解释本地文件系统（4）基于数据库的数据提供（5）数据库设计（6）优化数据提供逻辑（7）程序框架结构图

// wddn.cpp : Defines the initialization routines for the DLL.
//

#include "stdafx.h"
#include "wddn.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

//
//	Note!
//
//		If this DLL is dynamically linked against the MFC
//		DLLs, any functions exported from this DLL which
//		call into MFC must have the AFX_MANAGE_STATE macro
//		added at the very beginning of the function.
//
//		For example:
//
//		extern "C" BOOL PASCAL EXPORT ExportedFunction()
//		{
//			AFX_MANAGE_STATE(AfxGetStaticModuleState());
//			// normal function body here
//		}
//
//		It is very important that this macro appear in each
//		function, prior to any calls into MFC.  This means that
//		it must appear as the first statement within the 
//		function, even before any object variable declarations
//		as their constructors may generate calls into the MFC
//		DLL.
//
//		Please see MFC Technical Notes 33 and 58 for additional
//		details.
//

/////////////////////////////////////////////////////////////////////////////
// CWddnApp

BEGIN_MESSAGE_MAP(CWddnApp, CWinApp)
	//{{AFX_MSG_MAP(CWddnApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWddnApp construction

CWddnApp::CWddnApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CWddnApp object

CWddnApp theApp;


//得到文件扩展名称
CString GetFileExName(TCHAR cFileName[])
{	
	CString strFileName,strFileExName;
	strFileName = (CString)cFileName;
	strFileExName.Empty();
	for (int i=strFileName.GetLength()-1; i>=0; i--)
	{
		if (strFileName.GetAt(i) != '.')
			strFileExName = strFileName.GetAt(i) + strFileExName;
		else
			return strFileExName;
	}
	return strFileExName;
}

	//返回资源库名称的函数
__declspec(dllexport)  CString GetLibName()
{
	AFX_MANAGE_STATE(AfxGetStaticModuleState());
   return "我的电脑";
}
//返回资源库的标识号的函数
__declspec(dllexport)  CString  GetLibID()
{
  AFX_MANAGE_STATE(AfxGetStaticModuleState());
   return "wddn";
}	
//返回资源库与ID相关的目录中的文件XML数据包的函数
__declspec(dllexport)  MSXML::IXMLDOMElement * GetChildrenList(CString ID)
{
	AFX_MANAGE_STATE(AfxGetStaticModuleState());

	MSXML::IXMLDOMDocument* document = NULL;
	MSXML::IXMLDOMParseError* parseError = NULL;
	MSXML::IXMLDOMElement* element = NULL;	
	CString xmlStr;
	xmlStr="";
	xmlStr+="<list>";  
    if(ID==GetLibID()){
        //此时为“我的电脑”根目录
        return NULL;
	}else{
		   CString libID=(ID.MID(ID.Find(":")+1));
          CString strCurDir=libID;//文件夹目录
			HANDLE hFind;
			CString strEx;

			WIN32_FIND_DATA wfd;
			if (_chdir(strCurDir) != 0){
				AfxMessageBox("目录:"+strCurDir+"未找到!");
				return false;
			}
			hFind = FindFirstFile(_T("*.*"),&wfd);
			if(hFind == INVALID_HANDLE_VALUE) return false;
			if ((wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
				!(wfd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
			{
				if( wfd.cFileName[0] != '.' )
				{
					_chdir(".."); // 查找完毕之后, 返回上一级目录
				} 
			} 
			else
			{ 
				strEx = GetFileExName(wfd.cFileName);
				strEx.MakeUpper();
				if (!(wfd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
				{
                          //目录下的文件
						 CString tmpStr;
						//计算文件修改时间
						SYSTEMTIME st;
						FileTimeToSystemTime(&wfd.ftLastWriteTime, &st);
						CTime tm(st.wYear,st.wMonth,st.wDay,st.wHour,st.wMinute,st.wSecond);
						CString modifyTime=tm.Format("%Y年%m月%d日(%H:%M:%S)");//转换时间格式
						//计算文件大小
						int nFileSize=((wfd.nFileSizeHigh *MAXDWORD) +wfd.nFileSizeLow)/1024;
						if(nFileSize<=0) nFileSize=1;  
						  tmpStr.Format("<item text=\"%s\" pID=\"%s\" ID=\"%s%s\" size=\"%i KB\" modifyTime=\"%s\" type=\"%s\" icon=\"%s\"/>",
						  wfd.cFileName,ID,ID,wfd.cFileName,nFileSize,modifyTime,strEx,strEx);
						  xmlStr+=tmpStr;
				}
			} 
			while(FindNextFile(hFind, &wfd)) 
			{ 
				if ((wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
					!(wfd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
				{
					if( wfd.cFileName[0] != '.' )
					{
						_chdir(".."); // 查找完毕之后, 返回上一级目录
					} 
				} 
				else
				{ 
					strEx = GetFileExName(wfd.cFileName);
					strEx.MakeUpper();
					if (!(wfd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
					{
                          //目录下的文件
						 CString tmpStr;
						//计算文件修改时间
						SYSTEMTIME st;
						FileTimeToSystemTime(&wfd.ftLastWriteTime, &st);
						CTime tm(st.wYear,st.wMonth,st.wDay,st.wHour,st.wMinute,st.wSecond);
						CString modifyTime=tm.Format("%Y年%m月%d日(%H:%M:%S)");//转换时间格式
						//计算文件大小
						int nFileSize=((wfd.nFileSizeHigh *MAXDWORD) +wfd.nFileSizeLow)/1024;
						if(nFileSize<=0) nFileSize=1;  
						
						  tmpStr.Format("<item text=\"%s\" pID=\"%s\" ID=\"%s%s\" size=\"%i KB\" modifyTime=\"%s\" type=\"%s\" icon=\"%s\"/>",
						  wfd.cFileName,ID,ID,wfd.cFileName,nFileSize,modifyTime,strEx,strEx);
						  xmlStr+=tmpStr;

					}
				} 
			} 
			FindClose(hFind);
	}

	 xmlStr+="</list>";
	HRESULT hr;
	hr = CoInitialize(NULL);
	if (FAILED(hr)) {
        return NULL;
	}
	
	hr =CoCreateInstance(MSXML::CLSID_DOMDocument, NULL, 
		CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER, 
		MSXML::IID_IXMLDOMDocument, (LPVOID*)&document);
	if (!document) {
         return NULL;
	}
	BSTR bstr = NULL;
	document->put_async(VARIANT_FALSE);
	bstr = xmlStr.AllocSysString();
	VARIANT_BOOL varOkay = document->loadXML(bstr);
	SysFreeString(bstr);
	if (varOkay) {
		hr = document->get_documentElement(&element);
		if (FAILED(hr) || element == NULL) {
		    AfxMessageBox(_T("Error Loading XML"));
            return NULL;
		}
		return element;
	} else {
		long line, linePos;
		BSTR reason = NULL;
		document->get_parseError(&parseError);
		parseError->get_errorCode(&hr);
		parseError->get_line(&line);
		parseError->get_linepos(&linePos);
		parseError->get_reason(&reason);
		CString strMsg;
		strMsg.Format(_T("Error 0x%.8X on line %d, position %d\r\nReason: %s"), 
			hr, line, linePos, CString(reason));
		AfxMessageBox(strMsg);
		SysFreeString(reason);
        return NULL;
	}
   return NULL;
}
	//返回资源库与ID相关的目录中的子目录XML数据包的函数
__declspec(dllexport)  MSXML::IXMLDOMElement *  GetChildren(CString ID)
{
	AFX_MANAGE_STATE(AfxGetStaticModuleState());
 	MSXML::IXMLDOMDocument* document = NULL;
	MSXML::IXMLDOMParseError* parseError = NULL;
	MSXML::IXMLDOMElement* element = NULL;	
	CString xmlStr;
	xmlStr="";
	xmlStr+="<tree>";  
    if(ID==GetLibID()){
        //此时为“我的电脑”根目录
		CStringArray	arDriverName;
		CString			strDriverName;
		CString			str;
		UINT			nDriverType;
		char szDriverName[500];
		char szDriverLabel[500];
		memset(szDriverName,0,sizeof(szDriverName));
		memset(szDriverLabel,0,sizeof(szDriverLabel));
		DWORD nLength = GetLogicalDriveStrings(sizeof(szDriverName),szDriverName);
		
		for (int i=0; i<(int)nLength; i++)
		{
			if (szDriverName[i] != '\0')
				strDriverName += szDriverName[i];
			else
			{
				strDriverName = strDriverName.Left(strDriverName.GetLength() - 1);
				arDriverName.Add(strDriverName);
				strDriverName = "";
			}
		}
		char *szCurDir = NULL;
		for (i=0; i<arDriverName.GetSize(); i++)
		{
			nDriverType = GetDriveType((LPCTSTR)arDriverName.GetAt(i));
			GetVolumeInformation((LPCTSTR)(arDriverName.GetAt(i) + "\\"),szDriverLabel,\
				sizeof(szDriverLabel),NULL,NULL,0,NULL,0);
			  CString tmpStr;
			  tmpStr.Format("<item text=\"%s\" pID=\"%s\" ID=\"%s:%s\\\" icon=\"folder\"/>",(CString)szDriverLabel + "(" + arDriverName.GetAt(i) + " 盘)",ID,ID,arDriverName.GetAt(i) );
			  xmlStr+=tmpStr;
			memset(szDriverLabel,0,sizeof(szDriverLabel));
		}
	}else{
		   CString libID=(ID.MID(ID.Find(":")+1));
          CString strCurDir=libID;//文件夹目录
			HANDLE hFind;
			CString strEx;

			WIN32_FIND_DATA wfd;
			if (_chdir(strCurDir) != 0){
				AfxMessageBox("目录:"+strCurDir+"未找到!");
				return false;
			}
			hFind = FindFirstFile(_T("*.*"),&wfd);
			if(hFind == INVALID_HANDLE_VALUE) return false;
			if ((wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
				!(wfd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
			{
				if( wfd.cFileName[0] != '.' )
				{
					  CString tmpStr;
					  tmpStr.Format("<item text=\"%s\" pID=\"%s\" ID=\"%s%s\\\" icon=\"folder\"/>",wfd.cFileName,ID,ID,wfd.cFileName);
					  xmlStr+=tmpStr;
					_chdir(".."); // 查找完毕之后，返回上一级目录
				} 
			} 
			else
			{ 
				strEx = GetFileExName(wfd.cFileName);
				strEx.MakeUpper();
				if (!(wfd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
				{
                          //目录下的文件
				}
			} 
			while(FindNextFile(hFind, &wfd)) 
			{ 
				if ((wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
					!(wfd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
				{
					if( wfd.cFileName[0] != '.' )
					{
						  CString tmpStr;
						  tmpStr.Format("<item text=\"%s\" pID=\"%s\" ID=\"%s%s\\\" icon=\"folder\"/>",wfd.cFileName,ID,ID,wfd.cFileName);
						  xmlStr+=tmpStr;
						_chdir(".."); // 查找完毕之后，返回上一级目录
					} 
				} 
				else
				{ 
					strEx = GetFileExName(wfd.cFileName);
					strEx.MakeUpper();
					if (!(wfd.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
					{
                          //目录下的文件
					}
				} 
			} 
			FindClose(hFind);
	}

	 xmlStr+="</tree>";

	HRESULT hr;
	hr = CoInitialize(NULL);
	if (FAILED(hr)) {
        return NULL;
	}
	
	hr =CoCreateInstance(MSXML::CLSID_DOMDocument, NULL, 
		CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER, 
		MSXML::IID_IXMLDOMDocument, (LPVOID*)&document);

	if (!document) {
         return NULL;
	}

	BSTR bstr = NULL;
	document->put_async(VARIANT_FALSE);
	bstr = xmlStr.AllocSysString();
	VARIANT_BOOL varOkay = document->loadXML(bstr);
	SysFreeString(bstr);

	if (varOkay) {
		hr = document->get_documentElement(&element);
		//document->getElementsByTagName("tree");
		if (FAILED(hr) || element == NULL) {
		    AfxMessageBox(_T("Error Loading XML"));
            return NULL;
		}
		//AfxMessageBox(CString((char *)(element->Getxml())));
		return element;
	} else {
		long line, linePos;
		BSTR reason = NULL;
		
		document->get_parseError(&parseError);
		parseError->get_errorCode(&hr);
		parseError->get_line(&line);
		parseError->get_linepos(&linePos);
		parseError->get_reason(&reason);
		
		CString strMsg;
		strMsg.Format(_T("Error 0x%.8X on line %d, position %d\r\nReason: %s"), 
			hr, line, linePos, CString(reason));
		AfxMessageBox(strMsg);
				
		SysFreeString(reason);
        return NULL;
	}
   return NULL;
}
//返回资源库中与ID相关的资源的路径的函数
__declspec(dllexport)  CString GetFilePathByID(CString ID)
{
	AFX_MANAGE_STATE(AfxGetStaticModuleState());
	CString filePath=(ID.MID(ID.Find(":")+1));
    return filePath;
}