private static bool DeleteInternetCacheCore()
{
// ReSharper disable InconsistentNaming
const int CACHEGROUP_SEARCH_ALL = 0x0;
const int ERROR_NO_MORE_ITEMS = 259;
const uint CacheEntryType_Cookie = 1048577;
const uint CacheEntryType_History = 2097153;
// ReSharper restore InconsistentNaming
long groupId = 0;
var cacheEntryInfoBufferSizeInitial = 0;
var enumHandle = WinInet.FindFirstUrlCacheGroup(0, CACHEGROUP_SEARCH_ALL, IntPtr.Zero, 0, ref groupId, IntPtr.Zero);
if (enumHandle != IntPtr.Zero && ERROR_NO_MORE_ITEMS == Marshal.GetLastWin32Error())
{
return(false);
}
enumHandle = WinInet.FindFirstUrlCacheEntry(null, IntPtr.Zero, ref cacheEntryInfoBufferSizeInitial);
if (enumHandle != IntPtr.Zero && ERROR_NO_MORE_ITEMS == Marshal.GetLastWin32Error())
{
return(false);
}
var cacheEntryInfoBufferSize = cacheEntryInfoBufferSizeInitial;
var cacheEntryInfoBuffer = Marshal.AllocHGlobal(cacheEntryInfoBufferSize);
enumHandle = WinInet.FindFirstUrlCacheEntry(null, cacheEntryInfoBuffer, ref cacheEntryInfoBufferSizeInitial);
while (true)
{
var internetCacheEntry = (INTERNET_CACHE_ENTRY_INFOA)Marshal.PtrToStructure(
cacheEntryInfoBuffer, typeof(INTERNET_CACHE_ENTRY_INFOA));
cacheEntryInfoBufferSizeInitial = cacheEntryInfoBufferSize;
var type = internetCacheEntry.CacheEntryType;
var result = false;
if (type != CacheEntryType_Cookie && type != CacheEntryType_History)
{
result = WinInet.DeleteUrlCacheEntry(internetCacheEntry.lpszSourceUrlName);
}
if (!result)
{
result = WinInet.FindNextUrlCacheEntry(enumHandle, cacheEntryInfoBuffer, ref cacheEntryInfoBufferSizeInitial);
}
if (!result && ERROR_NO_MORE_ITEMS == Marshal.GetLastWin32Error())
{
break;
}
if (!result && cacheEntryInfoBufferSizeInitial > cacheEntryInfoBufferSize)
{
cacheEntryInfoBufferSize = cacheEntryInfoBufferSizeInitial;
cacheEntryInfoBuffer = Marshal.ReAllocHGlobal(cacheEntryInfoBuffer, (IntPtr)cacheEntryInfoBufferSize);
WinInet.FindNextUrlCacheEntry(enumHandle, cacheEntryInfoBuffer, ref cacheEntryInfoBufferSizeInitial);
}
}
Marshal.FreeHGlobal(cacheEntryInfoBuffer);
return(true);
}