private void reset()
{
status = DownloadFileStatus.INIT;
error = null;
contentBytes = 0;
console_line = 0;
FileName = null;
file_stream = null;
stream = null;
}
public download_file(string dest_dir, int index)
{
this.web_client = new WebClient();
this.dest_dir = dest_dir;
this.status = DownloadFileStatus.SUCCESS;
this.indexThread = index;
this.threadReset = new AutoResetEvent(false);
this.thread = new Thread(downloadAsync);
thread.Start();
}
private string getIcon(DownloadFileStatus st)
{
string res = null;
switch (st)
{
case DownloadFileStatus.INIT: res = "+"; break;
case DownloadFileStatus.DOWNLOAD: res = ">"; break;
case DownloadFileStatus.SUCCESS: res = "*"; break;
case DownloadFileStatus.ERROR: res = "E"; break;
}
return(string.Format("{0}", res));
}
/// <summary>
/// Convert a <see cref="DownloadFileStatus"/> to <see cref="ImportFileStatus"/>.
/// </summary>
/// <param name="status"><see cref="DownloadFileStatus"/> to be converted.</param>
/// <returns>Converted <see cref="ImportFileStatus"/>.</returns>
private ImportFileStatus EnumConversion(DownloadFileStatus status)
{
switch (status)
{
case DownloadFileStatus.AlreadyExists:
return(ImportFileStatus.AlreadyExists);
case DownloadFileStatus.InvalidFile:
return(ImportFileStatus.InvalidFile);
case DownloadFileStatus.Downloaded:
return(ImportFileStatus.SentToBeProcessed);
default:
return(ImportFileStatus.InvalidFile);
}
}
private void download_process()
{
status = DownloadFileStatus.DOWNLOAD;
if (!stream.CanRead || (file_stream.Length == contentBytes))
{
return;
}
if (file_stream.Length > 0 && !stream.CanSeek)
{
file_stream.SetLength(0);
}
int _count;
long bytesPerTime = 0;
long pos = file_stream.Position;
byte[] buffer = new byte[512 * 1024];
long startTime = DateTime.Now.Ticks;
if (pos != 0)
{
stream.Seek(pos, SeekOrigin.Begin);
}
while ((_count = stream.Read(buffer, 0, buffer.Length)) > 0)
{
file_stream.Write(buffer, 0, _count);
pos += _count;
bytesPerTime += _count;
var seconds = TimeSpan.FromTicks(DateTime.Now.Ticks - startTime).TotalSeconds;
if (seconds > 0.35)
{
double speed = (double)bytesPerTime / seconds;
bytesPerTime = 0;
startTime = DateTime.Now.Ticks;
if (currentAsyncResult.IsCompleted)
{
DownloadProgress.EndInvoke(currentAsyncResult);
currentAsyncResult = DownloadProgress.BeginInvoke(this, new DownloadProgressEventArgs(this, pos, speed), null, null);
}
}
}
}
private void start_download()
{
currentAsyncResult = DownloadProgress.BeginInvoke(this, new DownloadProgressEventArgs(this, 0, 0), null, null);
try
{
if (stream == null || Error != null)
{
return;
}
if (!stream.CanRead)
{
error = new Exception("Url has no access to read");
return;
}
init_file_stream();
download_process();
}
catch (Exception ex)
{
error = ex;
}
finally
{
if (file_stream != null)
{
file_stream.Close();
}
if (stream != null)
{
stream.Close();
}
status = error == null ? DownloadFileStatus.SUCCESS : DownloadFileStatus.ERROR;
if (!currentAsyncResult.IsCompleted)
{
DownloadProgress.EndInvoke(currentAsyncResult);
}
DownloadCompleted.Invoke(this);
}
}
private string getIcon(DownloadFileStatus st)
{
string res = null;
switch (st)
{
case DownloadFileStatus.INIT: res = "+"; break;
case DownloadFileStatus.DOWNLOAD: res = ">"; break;
case DownloadFileStatus.SUCCESS: res = "*"; break;
case DownloadFileStatus.ERROR: res = "E"; break;
}
return string.Format("{0}", res);
}
public download_file(string dest_dir, int index)
{
this.web_client = new WebClient();
this.dest_dir = dest_dir;
this.status = DownloadFileStatus.SUCCESS;
this.indexThread = index;
this.threadReset = new AutoResetEvent(false);
this.thread = new Thread(downloadAsync);
thread.Start();
}
private void start_download()
{
currentAsyncResult = DownloadProgress.BeginInvoke(this, new DownloadProgressEventArgs(this, 0, 0), null, null);
try
{
if (stream == null || Error != null) return;
if (!stream.CanRead)
{
error = new Exception("Url has no access to read");
return;
}
init_file_stream();
download_process();
}
catch (Exception ex)
{
error = ex;
}
finally
{
if (file_stream != null) file_stream.Close();
if (stream != null) stream.Close();
status = error == null ? DownloadFileStatus.SUCCESS : DownloadFileStatus.ERROR;
if (!currentAsyncResult.IsCompleted)
DownloadProgress.EndInvoke(currentAsyncResult);
DownloadCompleted.Invoke(this);
}
}
private void reset()
{
status = DownloadFileStatus.INIT;
error = null;
contentBytes = 0;
console_line = 0;
FileName = null;
file_stream = null;
stream = null;
}
private void download_process()
{
status = DownloadFileStatus.DOWNLOAD;
if (!stream.CanRead || (file_stream.Length == contentBytes)) return;
if (file_stream.Length > 0 && !stream.CanSeek)
{
file_stream.SetLength(0);
}
int _count;
long bytesPerTime = 0;
long pos = file_stream.Position;
byte[] buffer = new byte[512 * 1024];
long startTime = DateTime.Now.Ticks;
if (pos != 0) stream.Seek(pos, SeekOrigin.Begin);
while ((_count = stream.Read(buffer, 0, buffer.Length)) > 0)
{
file_stream.Write(buffer, 0, _count);
pos += _count;
bytesPerTime += _count;
var seconds = TimeSpan.FromTicks(DateTime.Now.Ticks - startTime).TotalSeconds;
if (seconds > 0.35)
{
double speed = (double)bytesPerTime / seconds;
bytesPerTime = 0;
startTime = DateTime.Now.Ticks;
if (currentAsyncResult.IsCompleted)
{
DownloadProgress.EndInvoke(currentAsyncResult);
currentAsyncResult = DownloadProgress.BeginInvoke(this, new DownloadProgressEventArgs(this, pos, speed), null, null);
}
}
}
}
