/// <summary>
/// Gets information about a file in the internet explorer cache
/// </summary>
/// <param name="Url">The url of the file to check the cache for</param>
/// <returns>The Internet_Cache_Entry_Info about the file</returns>
public static bool GetUrlCacheEntryInfo(string url, out Internet_Cache_Entry_Info cacheInfo)
{
if (url == null)
{
cacheInfo = new Internet_Cache_Entry_Info();
return(false);
}
// Set up buffer
int bufferSize =
Marshal.SizeOf(typeof(Internet_Cache_Entry_Info)) + url.Length + Kernel32.MAX_PATH;
IntPtr buffer = Marshal.AllocCoTaskMem(bufferSize);
try
{
// Get the URL Cache info
while (!GetUrlCacheEntryInfo(url, buffer, ref bufferSize))
{
switch (Marshal.GetLastWin32Error())
{
// Grow the buffer
case ERROR.INSUFFICIENT_BUFFER:
buffer = Marshal.ReAllocCoTaskMem(buffer, bufferSize);
break;
// Didn't find the file!
case ERROR.FILE_NOT_FOUND:
cacheInfo = new Internet_Cache_Entry_Info();
return(false);
// Some other exception occurred
default:
cacheInfo = new Internet_Cache_Entry_Info();
return(false);
}
}
// The resulting cache info
cacheInfo =
(Internet_Cache_Entry_Info)Marshal.PtrToStructure(buffer, typeof(Internet_Cache_Entry_Info));
return(true);
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
}
/// <summary>
/// Gets information about a file in the internet explorer cache
/// </summary>
/// <param name="Url">The url of the file to check the cache for</param>
/// <returns>The Internet_Cache_Entry_Info about the file</returns>
public static bool GetUrlCacheEntryInfo(string url, out Internet_Cache_Entry_Info cacheInfo)
{
if (url == null)
{
cacheInfo = new Internet_Cache_Entry_Info();
return false;
}
// Set up buffer
int bufferSize =
Marshal.SizeOf(typeof(Internet_Cache_Entry_Info)) + url.Length + Kernel32.MAX_PATH;
IntPtr buffer = Marshal.AllocCoTaskMem(bufferSize);
try
{
// Get the URL Cache info
while (!GetUrlCacheEntryInfo(url, buffer, ref bufferSize))
{
switch (Marshal.GetLastWin32Error())
{
// Grow the buffer
case ERROR.INSUFFICIENT_BUFFER:
buffer = Marshal.ReAllocCoTaskMem(buffer, bufferSize);
break;
// Didn't find the file!
case ERROR.FILE_NOT_FOUND:
cacheInfo = new Internet_Cache_Entry_Info();
return false;
// Some other exception occurred
default:
cacheInfo = new Internet_Cache_Entry_Info();
return false;
}
}
// The resulting cache info
cacheInfo =
(Internet_Cache_Entry_Info)Marshal.PtrToStructure(buffer, typeof(Internet_Cache_Entry_Info));
return true;
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
}
