Sunday, January 09, 2005

 

IE cache

1.
Exploring the URL Cache
Brian Wengert May 30, 2003
http://www.codeguru.com/Cpp/I-N/internet/article.php/c6217/

see also
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wininet/wininet/caching.asp

2.
VC中实现历史记录的全面清除
作者:陈亮
http://www.vckbase.com/document/viewdoc/?id=280

首先: 在 stdafx.h中要加入: #include "atlbase.h"
设置->Link 要引入库 : Wininet.lib shlwapi.lib

//在对话框的头文件中加入:

#include "wininet.h"
#include "UrlHist.h"

#define SWEEP_BUFFER_SIZE 10000

public:

enum DEL_CACHE_TYPE //要删除的类型。
{
File,//表示internet临时文件
Cookie //表示Cookie
};


//以下为一些辅助函数 ( 辅助函数的具体实现参见源代码中.限于篇幅不再给出 )
BOOL DeleteUrlCache(DEL_CACHE_TYPE type);
BOOL EmptyDirectory(LPCTSTR szPath, BOOL bDeleteDesktopIni = FALSE, BOOL bWipeIndexDat = FALSE);//清空一个目录
BOOL IsWindowsNT();//判断系统
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);

//现在我们可以分别实现每项清除功能。

1、清除IE临时文件

TCHAR szPath[MAX_PATH];
DeleteUrlCache(File);
if (SHGetSpecialFolderPath(NULL, szPath, CSIDL_INTERNET_CACHE, FALSE))
{ //得到临时目录,并清空它.
EmptyDirectory(szPath);
}

清除IE临时文件的另外一个途径是直接调用Wininet函数,请看下面用于清除IE临时文件的函数


BOOL DelTempFiles()
{
BOOL bResult = FALSE;
BOOL bDone = FALSE;
LPINTERNET_CACHE_ENTRY_INFO lpCacheEntry = NULL;

DWORD dwTrySize, dwEntrySize = 4096; // start buffer size
HANDLE hCacheDir = NULL;
DWORD dwError = ERROR_INSUFFICIENT_BUFFER;

do
{
switch (dwError)
{
// need a bigger buffer
case ERROR_INSUFFICIENT_BUFFER:
delete [] lpCacheEntry;
lpCacheEntry = (LPINTERNET_CACHE_ENTRY_INFO) new char[dwEntrySize];
lpCacheEntry->dwStructSize = dwEntrySize;
dwTrySize = dwEntrySize;
BOOL bSuccess;
if (hCacheDir == NULL)

bSuccess = (hCacheDir
= FindFirstUrlCacheEntry(NULL, lpCacheEntry,
&dwTrySize)) != NULL;
else
bSuccess = FindNextUrlCacheEntry(hCacheDir, lpCacheEntry, &dwTrySize);

if (bSuccess)
dwError = ERROR_SUCCESS;
else
{
dwError = GetLastError();
dwEntrySize = dwTrySize; // use new size returned
}
break;

// we are done
case ERROR_NO_MORE_ITEMS:
bDone = TRUE;
bResult = TRUE;
break;

// we have got an entry
case ERROR_SUCCESS:

// don''''''''''''''''t delete cookie entry
if (!(lpCacheEntry->CacheEntryType & COOKIE_CACHE_ENTRY))

DeleteUrlCacheEntry(lpCacheEntry->lpszSourceUrlName);

// get ready for next entry
dwTrySize = dwEntrySize;
if (FindNextUrlCacheEntry(hCacheDir, lpCacheEntry, &dwTrySize))
dwError = ERROR_SUCCESS;

else
{
dwError = GetLastError();
dwEntrySize = dwTrySize; // use new size returned
}
break;

// unknown error
default:
bDone = TRUE;
break;
}

if (bDone)
{
delete [] lpCacheEntry;
if (hCacheDir)
FindCloseUrlCache(hCacheDir);

}
} while (!bDone);
return bResult;
}
2、Cookie的清除



TCHAR szPath[MAX_PATH];
DeleteUrlCache(Cookie);
if (SHGetSpecialFolderPath(NULL, szPath, CSIDL_COOKIES, FALSE))
{//得到目录,并清空
EmptyDirectory(szPath);
}
3、浏览器地址栏历史地址的清除


SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Internet Explorer\\TypedURLs"));
4、清除表单自动完成历史记录


CString sKey;
DWORD dwRet;

if (IsWindows2k() || IsWindowsNT())//先判断系统
{
CString sBaseKey;
SECURITY_DESCRIPTOR NewSD;
BYTE* pOldSD;
PACL pDacl = NULL;
PSID pSid = NULL;
TCHAR szSid[256];
if (GetUserSid(&pSid))
{
//get the hiden key name
GetSidString(pSid, szSid);

sKey = _T("Software\\Microsoft\\Protected Storage System Provider\\");
sKey += szSid;

//get old SD
sBaseKey = sKey;
GetOldSD(HKEY_CURRENT_USER, sBaseKey, &pOldSD);

//set new SD and then clear
if (CreateNewSD(pSid, &NewSD, &pDacl))
{
RegSetPrivilege(HKEY_CURRENT_USER, sKey, &NewSD, FALSE);

sKey += _T("\\Data");
RegSetPrivilege(HKEY_CURRENT_USER, sKey, &NewSD, FALSE);

sKey += _T("\\e161255a-37c3-11d2-bcaa-00c04fd929db");
RegSetPrivilege(HKEY_CURRENT_USER, sKey, &NewSD, TRUE);

dwRet = SHDeleteKey(HKEY_CURRENT_USER, sKey);
}

if (pDacl != NULL)
HeapFree(GetProcessHeap(), 0, pDacl);

//restore old SD
if (pOldSD)
{
RegSetPrivilege(HKEY_CURRENT_USER, sBaseKey,
(SECURITY_DESCRIPTOR*)pOldSD, FALSE);
delete pOldSD;
}
}
if (pSid)
HeapFree(GetProcessHeap(), 0, pSid);
}

//win9x
DWORD dwSize = MAX_PATH;
TCHAR szUserName[MAX_PATH];
GetUserName(szUserName, &dwSize);

sKey = _T("Software\\Microsoft\\Protected Storage System Provider\\");
sKey += szUserName;
sKey += _T("\\Data\\e161255a-37c3-11d2-bcaa-00c04fd929db");
dwRet = SHDeleteKey(HKEY_LOCAL_MACHINE, sKey);




5、清除自动密码历史记录



SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Internet Explorer\\IntelliForms"));
6、清收藏夹中的内容
TCHAR szPath[MAX_PATH];
if (SHGetSpecialFolderPath(NULL, szPath, CSIDL_FAVORITES, FALSE))
{ //得到目录,并清空
EmptyDirectory(szPath);
}

7、清RAS自动拨号历史记录


SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\RAS Autodial\\Addresses"));
8、清系统临时文件夹


TCHAR szPath[MAX_PATH];
if (GetTempPath(MAX_PATH, szPath))//得到系统临时目录
{
EmptyDirectory(szPath, TRUE);
}
9、清空回收站


SHEmptyRecycleBin(NULL, NULL,
SHERB_NOCONFIRMATION | SHERB_NOPROGRESSUI | SHERB_NOSOUND);
10、清除"运行"中的自动匹配历史记录


SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\RunMRU"));
11、清"文档"中的历史记录


TCHAR szPath[MAX_PATH];
if (SHGetSpecialFolderPath(NULL, szPath, CSIDL_RECENT, FALSE))
{
EmptyDirectory(szPath);
}
SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\RecentDocs"));

12、清除上次登陆用户记录



SHDeleteValue(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon"),
_T("DefaultUserName"));
SHDeleteValue(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon"),
_T("AltDefaultUserName"));
SHDeleteValue(HKEY_LOCAL_MACHINE,
_T("Software\\Microsoft\\Windows\\CurrentVersion\\Winlogon"),
_T("DefaultUserName"));
13、清除"查找文件"自动匹配历史记录



SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Doc Find Spec
MRU"));
SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Internet Explorer\\Explorer Bars\\{C4EE31F3-4768-11D2-BE5C-00A0C9A83DA1}\\ContainingTextMRU"));
SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Internet Explorer\\Explorer Bars\\{C4EE31F3-4768-11D2-BE5C-00A0C9A83DA1}\\FilesNamedMRU"));

14、清除"查找计算机"自动匹配历史记录


SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FindComputerMRU"));
SHDeleteKey(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Internet Explorer\\Explorer Bars\\{C4EE31F3-4768-11D2-BE5C-00A0C9A83DA1}\\ComputerNameMRU"));

15、清除网络联接历史记录


TCHAR szPath[MAX_PATH];
if (SHGetSpecialFolderPath(NULL, szPath, CSIDL_NETHOOD, FALSE))
{ //得到目录,并清空
EmptyDirectory(szPath);
}
16、清远程登录历史记录


CString sKey;
for (int i=1; i<=8; i++)
{
sKey.Format(_T("Machine%d"), i);
SHDeleteValue(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Telnet"), sKey);

sKey.Format(_T("Service%d"), i);
SHDeleteValue(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Telnet"), sKey);

sKey.Format(_T("TermType%d"), i);
SHDeleteValue(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Telnet"), sKey);
}
SHDeleteValue(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Telnet"), _T("LastMachine"));
SHDeleteValue(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Telnet"), _T("LastService"));
SHDeleteValue(HKEY_CURRENT_USER,
_T("Software\\Microsoft\\Telnet"), _T("LastTermType"));

17、清浏览网址历史记录
下面这个函数可以用于清除网址历史记录

#include "SHLGUID.H"
HRESULT ClearHistory()
{
HRESULT hr;
CoInitialize(NULL);
{
IUrlHistoryStg2* pUrlHistoryStg2 = NULL;
hr= CoCreateInstance(CLSID_CUrlHistory,NULL,1, IID_IUrlHistoryStg2,(void**)&pUrlHistoryStg2);
if (SUCCEEDED(hr))
{
hr = pUrlHistoryStg2->ClearHistory();
pUrlHistoryStg2->Release();
}
}
CoUninitialize();
return hr;
}

// 如果上面代码不能清
// 则有下面的,不完美,但能工作.


TCHAR szPath[MAX_PATH];
GetWindowsDirectory(szPath, MAX_PATH);
_tcscat(szPath, _T("\\History"));
EmptyDirectory(szPath, FALSE, TRUE);

if (SHGetSpecialFolderPath(NULL, szPath, CSIDL_HISTORY, FALSE))
{
EmptyDirectory(szPath, FALSE, TRUE);
}
好了,一个简单的清除历史程序就写完了



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