清除浏覽器緩存

libwz_web.h

#pragma once

#include <wininet.h>
#include <UrlHist.h>

#pragma comment(lib,"Wininet.lib")
#pragma comment(lib,"shlwapi.lib")
#define SWEEP_BUFFER_SIZE			10000

enum DEL_CACHE_TYPE //要删除的類型。
{
	File,//表示internet臨時檔案
	Cookie //表示Cookie
};


BOOL ChangeIEVersion(std_string exeName,DWORD dVersion);//修改IE核心版本
//【清除網頁緩存】
BOOL DeleteUrlCache(DEL_CACHE_TYPE type);
BOOL EmptyDirectory(LPCTSTR szPath, BOOL bDeleteDesktopIni = FALSE,   BOOL bWipeIndexDat = FALSE);
BOOL IsWindowsNT();//判斷系統
BOOL IsWindows2k();
BOOL GetUserSid(PSID* ppSid);
void GetSidString(PSID pSid, LPTSTR szBuffer);
BOOL GetOldSD(HKEY hKey, LPCTSTR pszSubKey, BYTE** pSD);
BOOL CreateNewSD(PSID pSid, SECURITY_DESCRIPTOR* pSD, PACL* ppDacl);
BOOL RegSetPrivilege(HKEY hKey, LPCTSTR pszSubKey, SECURITY_DESCRIPTOR* pSD, BOOL bRecursive);
BOOL WipeFile(LPCTSTR szDir, LPCTSTR szFile);

libwz_web.cpp

#include "StdAfx.h"
#include "libwz_web.h"

BOOL ChangeIEVersion(std_string exeName,DWORD dVersion)
{
	//寫入系統資料庫
	HKEY hKey; 
	//HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
	LSTATUS   bres;
	bres   = RegOpenKeyExA(HKEY_CURRENT_USER,
		"Software\\Microsoft\\Internet Explorer\\Main\\FeatureControl\\FEATURE_BROWSER_EMULATION", 0, KEY_SET_VALUE, &hKey);
	if(bres  !=ERROR_SUCCESS){
		return FALSE;
	}
	bres   =RegSetValueExA(hKey,exeName.c_str(),0, REG_DWORD,(const BYTE*)&dVersion,sizeof(dVersion)) ;
	if(bres  !=ERROR_SUCCESS){
		return FALSE;
	}

	//關閉系統資料庫:
	RegCloseKey(hKey);
	return  TRUE;
}

BOOL DeleteUrlCache(DEL_CACHE_TYPE type)
{
	BOOL bRet = FALSE;
	HANDLE hEntry;
	LPINTERNET_CACHE_ENTRY_INFO lpCacheEntry = NULL;  
	DWORD dwEntrySize;

	//delete the files
	dwEntrySize = 0;
	hEntry = FindFirstUrlCacheEntry(NULL, NULL, &dwEntrySize);
	lpCacheEntry = (LPINTERNET_CACHE_ENTRY_INFO) new char[dwEntrySize];
	hEntry = FindFirstUrlCacheEntry(NULL, lpCacheEntry, &dwEntrySize);
	if (!hEntry)
	{
		goto cleanup;
	}

	do
	{
		if (type == File &&
			!(lpCacheEntry->CacheEntryType & COOKIE_CACHE_ENTRY))
		{
			DeleteUrlCacheEntry(lpCacheEntry->lpszSourceUrlName);
		}
		else if (type == Cookie &&
			(lpCacheEntry->CacheEntryType & COOKIE_CACHE_ENTRY))
		{
			DeleteUrlCacheEntry(lpCacheEntry->lpszSourceUrlName);
		}

		dwEntrySize = 0;
		FindNextUrlCacheEntry(hEntry, NULL, &dwEntrySize);
		delete [] lpCacheEntry; 
		lpCacheEntry = (LPINTERNET_CACHE_ENTRY_INFO) new char[dwEntrySize];
	}
	while (FindNextUrlCacheEntry(hEntry, lpCacheEntry, &dwEntrySize));

	bRet = TRUE;
cleanup:
	if (lpCacheEntry)
	{
		delete [] lpCacheEntry; 
	}
	return bRet;
}

BOOL EmptyDirectory(LPCTSTR szPath, BOOL bDeleteDesktopIni, 
	BOOL bWipeIndexDat)
{
	WIN32_FIND_DATA wfd;
	HANDLE hFind;
	CString sFullPath;
	CString sFindFilter;
	DWORD dwAttributes = 0;

	sFindFilter = szPath;
	sFindFilter += _T("\\*.*");
	if ((hFind = FindFirstFile(sFindFilter, &wfd)) == INVALID_HANDLE_VALUE)
	{
		return FALSE;
	}

	do
	{
		if (_tcscmp(wfd.cFileName, _T(".")) == 0 || 
			_tcscmp(wfd.cFileName, _T("..")) == 0 ||
			(bDeleteDesktopIni == FALSE && _tcsicmp(wfd.cFileName, _T("desktop.ini")) == 0))
		{
			continue;
		}

		sFullPath = szPath;
		sFullPath += _T('\\');
		sFullPath += wfd.cFileName;

		//去掉隻讀屬性
		dwAttributes = GetFileAttributes(sFullPath);
		if (dwAttributes & FILE_ATTRIBUTE_READONLY)
		{
			dwAttributes &= ~FILE_ATTRIBUTE_READONLY;
			SetFileAttributes(sFullPath, dwAttributes);
		}

		if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
		{
			EmptyDirectory(sFullPath, bDeleteDesktopIni, bWipeIndexDat);
			RemoveDirectory(sFullPath);
		}
		else
		{
			if (bWipeIndexDat && _tcsicmp(wfd.cFileName, _T("index.dat")) == 0)
			{
				WipeFile(szPath, wfd.cFileName);
			}
			DeleteFile(sFullPath);
		}
	}
	while (FindNextFile(hFind, &wfd));
	FindClose(hFind);

	return TRUE;
}

//判斷系統類型
BOOL IsWindowsNT()
{
	BOOL bRet = FALSE;
	BOOL bOsVersionInfoEx;
	OSVERSIONINFOEX osvi;

	// Try calling GetVersionEx using the OSVERSIONINFOEX structure,
	// If that fails, try using the OSVERSIONINFO structure.
	ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
	osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

	if( !(bOsVersionInfoEx = GetVersionEx ((OSVERSIONINFO *) &osvi)) )
	{
		// If OSVERSIONINFOEX doesn't work, try OSVERSIONINFO.
		osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
		if (! GetVersionEx ( (OSVERSIONINFO *) &osvi) ) 
			return bRet;
	}

	if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT && osvi.dwMajorVersion <= 4)
	{
		bRet = TRUE;
	}

	return bRet;
}

BOOL IsWindows2k()
{
	BOOL bRet = FALSE;
	BOOL bOsVersionInfoEx;
	OSVERSIONINFOEX osvi;

	// Try calling GetVersionEx using the OSVERSIONINFOEX structure,
	// If that fails, try using the OSVERSIONINFO structure.
	ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
	osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

	if( !(bOsVersionInfoEx = GetVersionEx ((OSVERSIONINFO *) &osvi)) )
	{
		// If OSVERSIONINFOEX doesn't work, try OSVERSIONINFO.
		osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
		if (! GetVersionEx ( (OSVERSIONINFO *) &osvi) ) 
			return bRet;
	}

	if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT && osvi.dwMajorVersion >= 5)
	{
		bRet = TRUE;
	}

	return bRet;
}

BOOL GetUserSid(PSID* ppSid)
{
	HANDLE hToken;
	BOOL bRes;
	DWORD cbBuffer, cbRequired;
	PTOKEN_USER pUserInfo;

	// The User's SID can be obtained from the process token
	bRes = OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken);
	if (FALSE == bRes)
	{
		return FALSE;
	}

	// Set buffer size to 0 for first call to determine
	// the size of buffer we need.
	cbBuffer = 0;
	bRes = GetTokenInformation(hToken, TokenUser, NULL, cbBuffer, &cbRequired);
	if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
	{
		return FALSE;
	}

	// Allocate a buffer for our token user data
	cbBuffer = cbRequired;
	pUserInfo = (PTOKEN_USER) HeapAlloc(GetProcessHeap(), 0, cbBuffer);
	if (NULL == pUserInfo)
	{
		return FALSE;
	}

	// Make the "real" call
	bRes = GetTokenInformation(hToken, TokenUser, pUserInfo, cbBuffer, &cbRequired);
	if (FALSE == bRes) 
	{
		return FALSE;
	}

	// Make another copy of the SID for the return value
	cbBuffer = GetLengthSid(pUserInfo->User.Sid);

	*ppSid = (PSID) HeapAlloc(GetProcessHeap(), 0, cbBuffer);
	if (NULL == *ppSid)
	{
		return FALSE;
	}

	bRes = CopySid(cbBuffer, *ppSid, pUserInfo->User.Sid);
	if (FALSE == bRes)
	{
		HeapFree(GetProcessHeap(), 0, *ppSid);
		return FALSE;
	}

	bRes = HeapFree(GetProcessHeap(), 0, pUserInfo);

	return TRUE;
}

void GetSidString(PSID pSid, LPTSTR szBuffer)
{
	//convert SID to string
	SID_IDENTIFIER_AUTHORITY *psia = ::GetSidIdentifierAuthority( pSid );
	DWORD dwTopAuthority = psia->Value[5];
	_stprintf(szBuffer, _T("S-1-%lu"), dwTopAuthority);

	TCHAR szTemp[32];
	int iSubAuthorityCount = *(GetSidSubAuthorityCount(pSid));
	for (int i = 0; i<iSubAuthorityCount; i++) 
	{
		DWORD dwSubAuthority = *(GetSidSubAuthority(pSid, i));
		_stprintf(szTemp, _T("%lu"), dwSubAuthority);
		_tcscat(szBuffer, _T("-"));
		_tcscat(szBuffer, szTemp);
	}
}

BOOL GetOldSD(HKEY hKey, LPCTSTR pszSubKey, BYTE** pSD)
{
	BOOL bRet = FALSE;
	HKEY hNewKey = NULL;
	DWORD dwSize = 0;
	LONG lRetCode;
	*pSD = NULL;

	lRetCode = RegOpenKeyEx(hKey, pszSubKey, 0, READ_CONTROL, &hNewKey);
	if(lRetCode != ERROR_SUCCESS)
		goto cleanup;

	lRetCode = RegGetKeySecurity(hNewKey, 
		(SECURITY_INFORMATION)DACL_SECURITY_INFORMATION, *pSD, &dwSize);
	if (lRetCode == ERROR_INSUFFICIENT_BUFFER)
	{
		*pSD = new BYTE[dwSize];
		lRetCode = RegGetKeySecurity(hNewKey, 
			(SECURITY_INFORMATION)DACL_SECURITY_INFORMATION, *pSD, &dwSize);
		if(lRetCode != ERROR_SUCCESS)
		{
			delete *pSD;
			*pSD = NULL;
			goto cleanup;
		}
	}
	else if (lRetCode != ERROR_SUCCESS)
		goto cleanup;

	bRet = TRUE; // indicate success

cleanup:
	if (hNewKey)
	{
		RegCloseKey(hNewKey);
	}
	return bRet;
}

BOOL CreateNewSD(PSID pSid, SECURITY_DESCRIPTOR* pSD, PACL* ppDacl)
{
	BOOL bRet = FALSE;
	PSID pSystemSid = NULL;
	SID_IDENTIFIER_AUTHORITY sia = SECURITY_NT_AUTHORITY;
	ACCESS_ALLOWED_ACE* pACE = NULL;
	DWORD dwAclSize;
	DWORD dwAceSize;

	// prepare a Sid representing local system account
	if(!AllocateAndInitializeSid(&sia, 1, SECURITY_LOCAL_SYSTEM_RID,
		0, 0, 0, 0, 0, 0, 0, &pSystemSid))
	{
		goto cleanup;
	}

	// compute size of new acl
	dwAclSize = sizeof(ACL) + 2 * (sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) + 
		GetLengthSid(pSid) + GetLengthSid(pSystemSid);

	// allocate storage for Acl
	*ppDacl = (PACL)HeapAlloc(GetProcessHeap(), 0, dwAclSize);
	if(*ppDacl == NULL)
		goto cleanup;

	if(!InitializeAcl(*ppDacl, dwAclSize, ACL_REVISION))
		goto cleanup;

	//    if(!AddAccessAllowedAce(pDacl, ACL_REVISION, KEY_WRITE, pSid))
	//		goto cleanup;

	// add current user
	dwAceSize = sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD) + GetLengthSid(pSid); 
	pACE = (ACCESS_ALLOWED_ACE *)HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, dwAceSize);

	pACE->Mask = KEY_READ | KEY_WRITE | KEY_ALL_ACCESS;
	pACE->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
	pACE->Header.AceFlags = CONTAINER_INHERIT_ACE | OBJECT_INHERIT_ACE;
	pACE->Header.AceSize = dwAceSize;

	memcpy(&pACE->SidStart, pSid, GetLengthSid(pSid));
	if (!AddAce(*ppDacl, ACL_REVISION, MAXDWORD, pACE, dwAceSize))
		goto cleanup;

	// add local system account
	HeapFree(GetProcessHeap(), 0, pACE);
	pACE = NULL;
	dwAceSize = sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD) + GetLengthSid(pSystemSid);
	pACE = (ACCESS_ALLOWED_ACE *)HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, dwAceSize);

	pACE->Mask = KEY_READ | KEY_WRITE | KEY_ALL_ACCESS;
	pACE->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
	pACE->Header.AceFlags = CONTAINER_INHERIT_ACE | OBJECT_INHERIT_ACE;
	pACE->Header.AceSize = dwAceSize;

	memcpy(&pACE->SidStart, pSystemSid, GetLengthSid(pSystemSid));
	if (!AddAce(*ppDacl, ACL_REVISION, MAXDWORD, pACE, dwAceSize))
		goto cleanup;

	if(!InitializeSecurityDescriptor(pSD, SECURITY_DESCRIPTOR_REVISION))
		goto cleanup;

	if(!SetSecurityDescriptorDacl(pSD, TRUE, *ppDacl, FALSE))
		goto cleanup;

	bRet = TRUE; // indicate success

cleanup:
	if(pACE != NULL)
		HeapFree(GetProcessHeap(), 0, pACE);
	if(pSystemSid != NULL)
		FreeSid(pSystemSid);

	return bRet;
}

BOOL RegSetPrivilege(HKEY hKey, LPCTSTR pszSubKey, 
	SECURITY_DESCRIPTOR* pSD, BOOL bRecursive)
{
	BOOL bRet = FALSE;
	HKEY hSubKey = NULL;
	LONG lRetCode;
	LPTSTR pszKeyName = NULL;;
	DWORD dwSubKeyCnt;
	DWORD dwMaxSubKey;
	DWORD dwValueCnt;
	DWORD dwMaxValueName;
	DWORD dwMaxValueData;
	DWORD i;

	if (!pszSubKey)
		goto cleanup;

	// open the key for WRITE_DAC access
	lRetCode = RegOpenKeyEx(hKey, pszSubKey, 0, WRITE_DAC, &hSubKey);
	if(lRetCode != ERROR_SUCCESS)
		goto cleanup;

	// apply the security descriptor to the registry key
	lRetCode = RegSetKeySecurity(hSubKey, 
		(SECURITY_INFORMATION)DACL_SECURITY_INFORMATION, pSD);
	if( lRetCode != ERROR_SUCCESS )
		goto cleanup;

	if (bRecursive)
	{
		// reopen the key for KEY_READ access
		RegCloseKey(hSubKey);
		hSubKey = NULL;
		lRetCode = RegOpenKeyEx(hKey, pszSubKey, 0, KEY_READ, &hSubKey);
		if(lRetCode != ERROR_SUCCESS)
			goto cleanup;

		// first get an info about this subkey ...
		lRetCode = RegQueryInfoKey(hSubKey, 0, 0, 0, &dwSubKeyCnt, &dwMaxSubKey,
			0, &dwValueCnt, &dwMaxValueName, &dwMaxValueData, 0, 0);
		if( lRetCode != ERROR_SUCCESS )
			goto cleanup;

		// enumerate the subkeys and call RegTreeWalk() recursivly
		pszKeyName = new TCHAR [MAX_PATH + 1];
		for (i=0 ; i<dwSubKeyCnt; i++)
		{
			lRetCode = RegEnumKey(hSubKey, i, pszKeyName, MAX_PATH + 1);
			if(lRetCode == ERROR_SUCCESS)
			{
				RegSetPrivilege(hSubKey, pszKeyName, pSD, TRUE);
			}
			else if(lRetCode == ERROR_NO_MORE_ITEMS)
			{
				break;
			}
		}
		delete [] pszKeyName ;
	}

	bRet = TRUE; // indicate success

cleanup:
	if (hSubKey)
	{
		RegCloseKey(hSubKey);
	}
	return bRet;
}

BOOL WipeFile(LPCTSTR szDir, LPCTSTR szFile)
{
	CString sPath;
	HANDLE	hFile;
	DWORD	dwSize;
	DWORD	dwWrite;
	char	sZero[SWEEP_BUFFER_SIZE];
	memset(sZero, 0, SWEEP_BUFFER_SIZE);

	sPath = szDir;
	sPath += _T('\\');
	sPath += szFile;

	hFile = CreateFile(sPath, GENERIC_WRITE, 
		FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 
		FILE_ATTRIBUTE_NORMAL, NULL);
	if (hFile == INVALID_HANDLE_VALUE)
	{
		return FALSE;
	}

	dwSize = GetFileSize(hFile, NULL);

	//skip file header (actually, I don't know the file format of index.dat)
	dwSize -= 64;
	SetFilePointer(hFile, 64, NULL, FILE_BEGIN);

	while (dwSize > 0)
	{
		if (dwSize > SWEEP_BUFFER_SIZE)
		{
			WriteFile(hFile, sZero, SWEEP_BUFFER_SIZE, &dwWrite, NULL);
			dwSize -= SWEEP_BUFFER_SIZE;
		}
		else
		{
			WriteFile(hFile, sZero, dwSize, &dwWrite, NULL);
			break;
		}
	}

	CloseHandle(hFile);
	return TRUE;
}

清除浏覽器緩存

libwz_web.h

libwz_web.cpp

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