/// <summary>
/// Checks that the resource is a <see cref="IDvResource"/> object.
/// Calls base class and notifies owner of change.
/// </summary>
/// <param name="newResource"></param>
/// <exception cref="InvalidCastException">
/// Thrown if newResource is not a IDvResource.
/// </exception>
public override void AddResource(IMediaResource newResource)
{
IDvResource res = (IDvResource)newResource;
base.AddResource(res);
this.NotifyRootOfChange();
}
/// <summary>
/// Checks that the resource is a <see cref="IDvResource"/> object.
/// Calls base class and notifies owner of change.
/// </summary>
/// <param name="newResource"></param>
/// <exception cref="InvalidCastException">
/// Thrown if newResource is not a IDvResource.
/// </exception>
public override void AddResource(IMediaResource newResource)
{
// cast and throw exception if needed
IDvResource res = (IDvResource)newResource;
base.AddResource(res);
this.NotifyRootOfChange();
}
/// <summary>
/// Returns a <see cref="IDvResource"/> object assocated with the item.
/// </summary>
/// <param name="resourceID">the resource ID of the desired <see cref="IDvResource"/> object</param>
/// <returns>The <see cref="IDvResource"/> instance, or null if it doesn't exist.</returns>
protected internal IDvResource GetResource(string resourceID)
{
IDvResource retVal = null;
this.m_LockResources.AcquireReaderLock(-1);
if (this.m_Resources != null)
{
foreach (IDvResource res in this.m_Resources)
{
if (res.ResourceID == resourceID)
{
retVal = res;
break;
}
}
}
this.m_LockResources.ReleaseReaderLock();
return(retVal);
}
private void Handle_OnRequestSaveBinary(MediaServerDevice sender, IDvResource res)
{
Exception error = null;
this.m_LockRoot.WaitOne();
try
{// Throw exceptions if files are to not be deleted.
//
if (res.AllowImport == false)
{
throw new Error_AccessDenied("The resource cannot be overwritten or created.");
}
}
catch (Exception e)
{
error = e;
}
this.m_LockRoot.ReleaseMutex();
if (error != null)
{
throw new ApplicationException("Handle_OnRequestSaveBinary()", error);
}
}
private void Handle_OnRequestDeleteBinary(MediaServerDevice sender, IDvResource res)
{
Exception error = null;
this.m_LockRoot.WaitOne();
try
{
// Throw exceptions if the file should not be deleted.
//
if (res.AllowImport == false)
{
//throw new Error_AccessDenied("The resource cannot be deleted.");
}
/// The UPNP layer will not delete the actual file from the local file system.
/// I should note that if multiple resources are bound to the same file, then
/// the logic in this method prevents the file from being deleted.
///
if (res.ContentUri.StartsWith(DvMediaResource.AUTOMAPFILE))
{
string filename = res.ContentUri.Substring(DvMediaResource.AUTOMAPFILE.Length);
File.Delete(filename);
}
}
catch (Exception e)
{
error = e;
}
this.m_LockRoot.ReleaseMutex();
if (error != null)
{
throw new ApplicationException("Handle_OnRequestDeleteBinary()", error);
}
}
/// <summary>
/// Constructor - only created by <see cref="MediaServerDevice"/>
/// when an HTTP-based file transfer occurs for either input or output from
/// the server.
/// </summary>
/// <param name="incoming">required - indicates input or output direction</param>
/// <param name="importExportTransfer">
/// required - indicates if transfer was initiated from ImportResource or
/// ExportResource action request
/// </param>
/// <param name="session">
/// required - the <see cref="HTTPSession"/> object that's
/// carrying the stream.</param>
/// <param name="res">
/// required - the related <see cref="IDvResource"/> object
/// that is related to the file transfer
/// </param>
/// <param name="stream">
/// The stream object where the binary data is being stored or obtained from.
/// </param>
/// <param name="expectedLength">
/// The length of the binary data, if known before hand.
/// </param>
internal HttpTransfer(bool incoming, bool importExportTransfer, HTTPSession session, IDvResource res, System.IO.Stream stream, long expectedLength)
{
this.Incoming = incoming;
this.ImportExportTransfer = importExportTransfer;
this.Session = session;
// explicitly keep the source and remote
// because if the session gets closed
// they become null
this.Source = session.Source;
this.Destination = session.Remote;
this.Resource = res;
this.Stream = stream;
this.m_TransferSize = expectedLength;
this.ClosedOrDone = false;
this.CriticalError = (session == null);
}
