public DownloadAgent(IDownloadAgentHelper downloadAgentHelper)
{
m_Helper = downloadAgentHelper;
m_Task = null;
m_FileStream = null;
m_WaitFlushSize = 0;
m_StartLength = 0;
m_SavedLength = 0;
m_Disposed = false;
DownloadAgentStart = null;
}
public void Reset()
{
m_Helper.Reset();
if (m_FileStream != null)
{
m_FileStream.Close();
m_FileStream = null;
}
m_Task = null;
m_WaitFlushSize = 0;
}
public void Start(DownloadTask task)
{
if (task == null)
{
throw;
}
m_Task = task;
m_Task.Status = DownloadTaskStatus.Doing;
string downloadFile = string.Format();
try
{
if (File.Exists(downloadFile))
{
m_FileStream = File.OpenWrite(downloadFile);
m_FileStream.Seek(0, SeekOrigin.End);
m_StartLength = m_SavedLength = (int)m_FileStream.Length;
m_DownloadedLength = 0;
}
else
{
string directory = Path.GetDirectoryName(m_Task.DownloadPath);
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
m_FileStream = new FileStream(downloadFile, FileMode.Create, FileAccess.Write);
m_StartLength = m_SavedLength = m_DownloadedLength = 0;
}
if (DownloadAgentStart)
{
DownloadAgentStart(this);
}
if (m_StartLength > 0)
{
m_Helper.Download(m_Task.DownloadUri, m_StartLength, m_Task.UserData);
}
}
catch (Exception e)
{
OnDownloadAgentHelperError(this, new DownloadAgentHelperErrorEventArgs());
}
}