static void Main(string[] args)
{
FileDownloader downloade = new FileDownloader();
downloade.DownloadComplete += new EventHandler(downloade_DownloadedComplete);
downloade.ProgressChanged += new DownloadProgressHandler(downloade_ProgressChanged);
downloade.Download("http://gianfratti.com/media/downloads/ContratoServicos.doc", "c:\\");
}
/// <summary>
/// return false when no more task
/// </summary>
/// <returns></returns>
private Boolean WorkOnce()
{
Task activeTask;
DownloadTaskInfo activeTaskSnapshot;
lock (m_lock)
{
if (m_taskQueue.Count == 0) //nothing to do
return false;
activeTask = m_taskQueue[0];
m_taskQueue.RemoveAt(0);
activeTaskSnapshot = activeTask.ToDownloadTaskInfo();
activeTask.status = DownloadTaskStatus.Downloading;
}
if (File.Exists(activeTaskSnapshot.localPath)) //local file exist, check whether already finished
{
if (!FileDownloader.IsFileInProgress(activeTaskSnapshot.localPath))
{
Int64 fileSize;
if (CalcFileMd5AndSize(activeTaskSnapshot.localPath, out fileSize) == activeTaskSnapshot.md5)
{
lock (m_lock)
{
activeTask.status = DownloadTaskStatus.Finished;
activeTask.totalSize = fileSize;
activeTask.finishedSize = fileSize;
RaiseTaskEndEvent(activeTask.ToDownloadTaskInfo());
return true;
}
}
else //file content is not correct
{
File.Delete(activeTaskSnapshot.localPath);
//download again
}
}
}
FileDownloader downloader = new FileDownloader();
Boolean bCanceled = false;
downloader.ProgressChanged += (sender, arg) =>
{
//update task status
lock (m_lock)
{
if (!activeTask.status.CanPause()) //stopped
{
downloader.Cancel();
bCanceled = true;
}
else
{
activeTask.totalSize = arg.TotalFileSize;
activeTask.finishedSize = arg.CurrentFileSize;
}
}
};
downloader.DownloadComplete += (sender, arg) =>
{
};
try
{
Directory.CreateDirectory(m_rootDir);
downloader.Download(activeTask.url, activeTask.localPath);
if (!bCanceled)
{
Int64 fileSize;
if (CalcFileMd5AndSize(activeTaskSnapshot.localPath, out fileSize) == activeTaskSnapshot.md5)
{
lock (m_lock)
{
activeTask.status = DownloadTaskStatus.Finished;
activeTask.totalSize = fileSize;
activeTask.finishedSize = fileSize;
}
}
else //md5 dismatch
{
File.Delete(activeTaskSnapshot.localPath);
lock (m_lock)
{
activeTask.status = DownloadTaskStatus.Failed;
activeTask.errorCode = DownloadTaskErrorCode.Md5Dismatch;
}
}
}
}
catch (WebException e)
{
lock (m_lock)
{
activeTask.status = DownloadTaskStatus.Failed;
activeTask.errorCode = DownloadTaskErrorCode.NetworkError;
activeTask.innerErrorCode = (Int32)e.Status;
activeTask.errorMessage = e.Message;
}
}
catch (IOException e)
{
lock (m_lock)
{
activeTask.status = DownloadTaskStatus.Failed;
activeTask.errorCode = DownloadTaskErrorCode.IOError;
activeTask.innerErrorCode = 0;
activeTask.errorMessage = e.Message;
}
}
if (!bCanceled)
RaiseTaskEndEvent(activeTask.ToDownloadTaskInfo());
return true;
}