/// <summary>
/// Asynchronusly retrieve a MD5 hash. The XMD5 command is non-standard
/// and not guaranteed to work.
/// </summary>
/// <param name="client">FtpClient Object</param>
/// <param name="path">Full or relative path to remote file</param>
/// <param name="callback">AsyncCallback</param>
/// <param name="state">State Object</param>
/// <returns>IAsyncResult</returns>
public static IAsyncResult BeginGetXMD5(this FtpClient client, string path, AsyncCallback callback, object state) {
AsyncGetXMD5 func = new AsyncGetXMD5(client.GetXMD5);
IAsyncResult ar = func.BeginInvoke(path, callback, state); ;
lock (m_asyncmethods) {
m_asyncmethods.Add(ar, func);
}
return ar;
}
/// <summary>
/// Begins an asynchronous operation to retrieve a XMD5 hash. The XMD5 command is non-standard
/// and not guaranteed to work.
/// </summary>
/// <param name="path">Full or relative path to remote file</param>
/// <param name="callback">AsyncCallback</param>
/// <param name="state">State Object</param>
/// <returns>IAsyncResult</returns>
public IAsyncResult BeginGetXMD5(string path, AsyncCallback callback, object state)
{
AsyncGetXMD5 func = new AsyncGetXMD5(GetXMD5);
IAsyncResult ar = func.BeginInvoke(path, callback, state);;
lock (m_asyncmethods) {
m_asyncmethods.Add(ar, func);
}
return(ar);
}
/// <summary>
/// Ends an asynchronous call to <see cref="BeginGetXMD5"/>
/// </summary>
/// <param name="ar">IAsyncResult returned from <see cref="BeginGetXMD5"/></param>
/// <returns>The MD5 hash of the specified file.</returns>
public string EndGetXMD5(IAsyncResult ar)
{
AsyncGetXMD5 func = null;
lock (m_asyncmethods) {
if (!m_asyncmethods.ContainsKey(ar))
{
throw new InvalidOperationException("The specified IAsyncResult was not found in the collection.");
}
func = (AsyncGetXMD5)m_asyncmethods[ar];
m_asyncmethods.Remove(ar);
}
return(func.EndInvoke(ar));
}