public static void SendFileAPM(this Socket socket, string filename, byte[] preBuffer, byte[] postBuffer, TransmitFileOptions flags, Action handler)
{
var callback = new AsyncCallback(asyncResult =>
{
((Socket)asyncResult.AsyncState).EndSendFile(asyncResult);
handler();
});
socket.BeginSendFile(filename, preBuffer, postBuffer, flags, callback, socket);
}
internal static Task SendFileAsync(this Socket s, string file)
{
var tcs = new TaskCompletionSource<int>();
s.BeginSendFile(file, iasr =>
{
try
{
s.EndSendFile(iasr);
}
catch (Exception e)
{
tcs.SetException(e);
}
}, null);
return tcs.Task;
}
internal static IObservable<int> SendFileAsync(this Socket s, string file)
{
return new AsyncOperation<int>(
(c, st) => s.BeginSendFile(file, c, st),
iasr => { s.EndSendFile(iasr); return 0; });
}
public static IObservable<Unit> SendFileObservable(this Socket socket, string fileName, byte[] preBuffer, byte[] postBuffer, TransmitFileOptions flags)
{
Contract.Requires(socket != null);
Contract.Ensures(Contract.Result<IObservable<Unit>>() != null);
return Task.Factory.FromAsync<string, Tuple<byte[], byte[]>, TransmitFileOptions>(
(fn, buffers, fg, callback, state) => socket.BeginSendFile(fn, buffers.Item1, buffers.Item2, fg, callback, state),
socket.EndSendFile,
fileName,
Tuple.Create(preBuffer, postBuffer),
flags,
state: null)
.ToObservable();
}
/// <summary>
/// Extends BeginSendFile so that when a state object is not needed, null does not need to be passed.
/// <example>
/// socket.BeginSendFile(fileName, preBuffer, postBuffer, flags, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginSendFile(this Socket socket, String fileName, Byte[] preBuffer, Byte[] postBuffer, TransmitFileOptions flags, AsyncCallback callback)
{
if(socket == null) throw new ArgumentNullException("socket");
return socket.BeginSendFile(fileName, preBuffer, postBuffer, flags, callback, null);
}
/// <summary>
/// Extends BeginSendFile so that when a state object is not needed, null does not need to be passed.
/// <example>
/// socket.BeginSendFile(fileName, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginSendFile(this Socket socket, String fileName, AsyncCallback callback)
{
if(socket == null) throw new ArgumentNullException("socket");
return socket.BeginSendFile(fileName, callback, null);
}