/// <summary>
/// Invokes all the Initialiser methods defined in this class
/// </summary>
/// <param name="extension">The extension of the current file</param>
/// <returns>true if the file type could be determined, false otherwise</returns>
private bool InvokeInitialisers(string extension)
{
try
{
using (new BinaryDataLock(m_fileData.BinaryFileData))
{
if (0 < extension.Length)
{
MethodInfo method;
if (m_ExtensionDictionary.TryGetValue(extension, out method))
return InvokeMethod(method);
return false;
}
foreach (MethodInfo method in m_InitialiserMethods)
{
if (InvokeMethod(method))
return true;
}
return false;
}
}
catch(Exception ex)
{
Logger.LogError(ex.Message);
return false;
}
finally
{
if (m_lockbyteswrapper != null)
m_lockbyteswrapper.Dispose();
m_lockbyteswrapper = null;
}
}
public static string GetMessageClassNotOnDisk(BinaryData binaryData)
{
using (LockBytesWrapper lockbyteswrapper = new LockBytesWrapper(binaryData))
{
if (null == lockbyteswrapper.ILockBytesInterface)
return String.Empty;
StructuredStorageInterface.IStorage iStorage = null;
uint iRet =
StructuredStorageInterface.StgOpenStorageOnILockBytes(lockbyteswrapper.ILockBytesInterface, null,
StructuredStorageInterface.ReadOnlyMode,
System.IntPtr.Zero, 0, out iStorage);
if (0 != iRet)
{
ComObjectGovernor.ReleaseObject(iStorage);
return String.Empty;
}
IStream iStream = null;
Encoding encoding = Encoding.ASCII;
try
{
iStream = iStorage.OpenStream("__substg1.0_001A001F", IntPtr.Zero,
Convert.ToInt32(StructuredStorageInterface.ReadOnlyMode), 0);
encoding = Encoding.Unicode;
}
catch (System.Runtime.InteropServices.COMException)
{
try
{
iStream = iStorage.OpenStream("__substg1.0_001A001E", IntPtr.Zero,
Convert.ToInt32(StructuredStorageInterface.ReadOnlyMode), 0);
}
catch (System.Runtime.InteropServices.COMException)
{
ComObjectGovernor.ReleaseObject(iStorage);
return String.Empty;
}
}
try
{
System.Runtime.InteropServices.ComTypes.STATSTG stat;
iStream.Stat(out stat, 0);
IntPtr read = IntPtr.Zero;
byte[] contents = new byte[stat.cbSize];
iStream.Read(contents, (int)stat.cbSize, read);
return encoding.GetString(contents);
}
finally
{
ComObjectGovernor.ReleaseObject(iStream);
ComObjectGovernor.ReleaseObject(iStorage);
}
}
}
private void Dispose(bool disposing)
{
CreateLock();
lock (m_lock)
{
if (m_bdisposed)
return;
m_bdisposed = true;
}
if (disposing)
{
GC.SuppressFinalize(this);
if (null != m_impl)
{
m_impl.Dispose();
m_impl = null;
}
}
if (null != m_lockbyteswrapper)
m_lockbyteswrapper.Dispose();
m_lockbyteswrapper = null;
}
private IStream GetStream(out StructuredStorageInterface.IStorage iStorage, string streamname)
{
if (m_bNotAStreamFile)
{
iStorage = null;
return null;
}
if (!HasStructuredStorageHeader())
{
m_bNotAStreamFile = false;
iStorage = null;
return null;
}
uint iRet = 0;
if (Workshare.Interop.Options.OptionApi.GetBool("UseDiskBasedFiles") && !string.IsNullOrEmpty(m_fileData.Filename) && m_fileData.BinaryFileData is DiskBinaryData)
{
iRet = StructuredStorageInterface.StgOpenStorage(m_fileData.Filename, null, StructuredStorageInterface.ReadOnlyModeTransacted, System.IntPtr.Zero, 0, out iStorage);
}
else
{
if (m_lockbyteswrapper == null)
{
m_lockbyteswrapper = new LockBytesWrapper(m_fileData.BinaryFileData);
}
else
{
if (!m_lockbyteswrapper.Represents(m_fileData.BinaryFileData))
{
throw new InvalidOperationException("Invalid use of lockbyteswrapper in FileTypeIdentifiers");
}
}
if (null == m_lockbyteswrapper.ILockBytesInterface)
{
ErrorMessage errorMessage = new ErrorMessage(
"EXPECTED_VALID",
"Workshare.Policy.Engine.Properties",
Assembly.GetExecutingAssembly());
Logger.LogError(errorMessage.LogString);
throw new NullReferenceException(errorMessage.DisplayString + " - " + "ILockBytes");
}
iRet = StructuredStorageInterface.StgOpenStorageOnILockBytes(m_lockbyteswrapper.ILockBytesInterface, null, StructuredStorageInterface.ReadOnlyMode, System.IntPtr.Zero, 0, out iStorage);
}
if (0 != iRet)
{
ComObjectGovernor.ReleaseObject(iStorage);
if (StructuredStorageInterface.STG_E_SHAREVIOLATION != iRet)
{
m_bNotAStreamFile = true;
return null;
}
ErrorMessage errorMessage = new ErrorMessage(
"FAILED_OPEN_STORAGE",
"Workshare.Policy.Engine.Properties",
Assembly.GetExecutingAssembly(), iRet.ToString("x", CultureInfo.InvariantCulture));
Logger.LogError(errorMessage.LogString);
throw new FileLoadException(errorMessage.DisplayString, m_fileData.Filename);
}
IStream iStream;
try
{
iStream = iStorage.OpenStream(streamname, IntPtr.Zero, Convert.ToInt32(StructuredStorageInterface.ReadOnlyMode), 0);
}
catch (System.Runtime.InteropServices.COMException)
{
ComObjectGovernor.ReleaseObject(iStorage);
// iStorage.OpenStream no longer throws STG_E_FILENOTFOUND for some reason, and instead throws an RPC error
// which is quite generic anyway ... so we no longer check for error code.
//if (StructuredStorageInterface.STG_E_FILENOTFOUND != (uint) e.ErrorCode)
//throw e;
return null;
}
return iStream;
}
