cachereader.h

用来清理ie缓存的

#include <wininet.h>
#pragma comment(lib,"wininet.lib")
//This is the structure of the cache folder
//we add one space to the foldername for a '\0' at the end to make it a string
typedef struct CacheFolder
{
	TCHAR szFolderName[9];//folder name
	DWORD dwData;
}CACHEFOLDER, *LPCACHEFOLDER;
//this is a cache folders holder
typedef struct CacheFolders
{
	WORD nNumOfFolders;//total number of folders
	CacheFolder *folders;//Placeholder
}CACHEFOLDERS, *LPCACHEFOLDERS;
//here we have a cookie entry
typedef struct CookieEntry
{
	PTCHAR	pszName;
	PTCHAR	pszValue;
	PTCHAR	pszUrlPath;
	DWORD	dwFlags;//Security Flags
	DWORD	dwLowWordExpiration;//LowWord of FILETIME
	DWORD	dwHighWordExpiration;//HighWord of FILETIME
	DWORD	dwLowWordCreation;//LowWord of FILETIME
	DWORD	dwHighWordCreation;//HighWord of FILETIME
	CHAR	chEnd;//'*'
}COOKIEENTRY, *LPCOOKIEENTRY;
//a few defines for our use
#define CACHEFOLDER_OFFSET(numFolder,maxFolders) ((maxFolders-numFolder)*sizeof(CacheFolder))
#define HASH_ID	0x48534148L//"HASH" 
#define REDR_ID	0x52444552L//"REDR" 
#define URL_ID	0x204C5255L//"URL " 
#define LEAK_ID	0x4C45414bL//"LEAK"
#define BLOCK_SIZE 0x80
#define CACHEFOLDER_NAMESIZE	8
#define CACHE_FOLDERNUM			0x48
#define CACHE_FOLDERNAMES		0x50
//this is the basic structure for the url entries
typedef struct UrlEntry
{
	TCHAR szRecordType[4];//=URL_ID
	DWORD dwRecordSize;//="02 00 00 00" : ActualSize =  dwRecordSize* (128 Bytes or 0x80)
	FILETIME modifieddate;

	FILETIME accessdate;
	DWORD dwUnsure1;
	DWORD dwUnsure2;

	DWORD wFileSizeLow;
	DWORD wFileSizeHigh;//???
	BYTE uBlank[8];//expire time?
#ifdef __IE40__
	DWORD dwExtra;//Extra one here if its IE4
#endif
	DWORD uSame; //= "60 00 00 00"
	DWORD dwCookieOffset;//="68 00 00 00"
	BYTE uFolderNumber;//="FE" FE=No Folder
	BYTE unknown[3];//="00 10 10"
	DWORD uFilenameOffset;

	DWORD dwCacheEntryType; //= "01 00 10 00"
	DWORD unSure;//="00 00 00 00"
	DWORD dwHeaderSize;// 00 00 00 00
	DWORD dwUnknown;//"00 00 00 00" 

	DWORD dwUnsure3;//???
	DWORD wHitCount;
	DWORD dwUseCount;//00 00 00 00
	DWORD dwData2;//??

	BYTE uMiscExtraData[8];
	BYTE lpText[1];//this will contain the url, filename, http response, and user with 0x00, 0xF0, 0xAD, and 0x0B as separating characters.

	//Format:
	//WebUrl
	//LocalFileName
	// The order of the following changes and is optional
	//HTTP 1.1 / OK
	//Pragma: no cache
	//Content Type
	//ETag
	//Content Length
	//~U : username
}URLENTRY, *LPURLENTRY;

//Leak entries use the same format as a UrlEntry, however the lpText only has the WebUrl without extra info stored in it
typedef UrlEntry LeakEntry;
typedef URLENTRY LEAKENTRY, *LPLEAKENTRY;
//a redr entry
typedef struct RedrEntry
{
	TCHAR szRecordType[4];//=REDR_ID
	DWORD dwRecordSize;//="01 00 00 00" : ActualSize =  dwRecordSize* (128 Bytes (0x80 Bytes))
	FILETIME dwNotSur;
	BYTE lpWebUrl[1];//Url till end
}REDRENTRY, *LPREDRENTRY;
//a hash entry
typedef struct HashEntry
{
	TCHAR szRecordType[4];//=HASH_ID
	DWORD dwRecordSize;//="20 00 00 00" : ActualSize =  dwRecordSize* (128 Bytes (0x80 Bytes))
	BYTE lpHashText[1];
}HASHENTRY,*LPHASHENTRY;
//this opens the cache file
HANDLE OpenCacheFile(TCHAR* szCacheFilePath);
//deal with the cache folders
WORD GetCacheFolderNum(HANDLE hFile);
void GetCacheFolders(HANDLE hFile, WORD wFolders,LPCACHEFOLDERS& pFolders);
CString GetFolderName(LPCACHEFOLDERS pFolders, WORD wFolderNum);
//these get the cache entires
DWORD GetFirstCacheEntry(HANDLE hFile,DWORD* lpdwOffset);
DWORD GetNextCacheEntry(HANDLE hFile,DWORD* lpdwOffset);//Takes a current offset, returns new offset
//these read the various types of entries
void ReadCacheEntry(HANDLE hFile, DWORD* lpdwOffset, LPURLENTRY& lpData);
void ReadCacheLeakEntry(HANDLE hFile, DWORD* lpdwOffset, LPLEAKENTRY& lpData);
void ReadCacheRedrEntry(HANDLE hFile, DWORD* lpdwOffset, LPREDRENTRY& lpData);
void ReadCacheHashEntry(HANDLE hFile, DWORD* lpdwOffset, LPHASHENTRY& lpData);

//these two functions are use the winInet functions for dealing with caches
//the LPINTERNET_CACHE_ENTRY_INFO must be allocated space before these functions are called.
//Ideally you can allocate only one structure, and then re-use it for each call...
HANDLE GetFirstInetCacheEntry(LPINTERNET_CACHE_ENTRY_INFO lpCacheEntry, DWORD &dwEntrySize/*=4096*/);
//It is important to note that the dwEntrySize is modified from within the function calls to represent 
//the size of the data actually returned. Therefore if you are using one variable as the size, you need to 
//reset the variable to the actual allocated entry size before the next call to the function.
BOOL GetNextInetCacheEntry(HANDLE &hCacheDir, LPINTERNET_CACHE_ENTRY_INFO lpCacheEntry, DWORD &dwEntrySize/*=4096*/);