private void doWork()
{
int index = 0;
try
{
while (!isForcedStopDownload && MyGlobal.downloadServiceData?.Count > index)
{
RegisterListener(MyGlobal.downloadListener);
Log.Debug("DownloadService", "Working...");
ImageDownloadInformation data = null;
lock (MyGlobal.downloadServiceData)
{
data = MyGlobal.downloadServiceData[index++];
}
if (data != null)
{
downloadFile(data);
}
do
{
Thread.Sleep(10);
} while (IsPauseDownload);
if (isForcedStopDownload)
{
try
{
while (MyGlobal.downloadServiceData.Count > index)
{
data = MyGlobal.downloadServiceData[index++];
data.isFailed = true;
}
}
catch (Exception) { }
break;
}
}
}
catch (Exception) { }
workFinished();
}
public void OnNewFileDownloadStarted(ImageDownloadInformation file)
{
//adapter.data = downloadServiceData; RunOnUiThread(notify);
}
public void OnFileDownloadSuccessful(ImageDownloadInformation file)
{
//adapter.data = downloadServiceData;
RunOnUiThread(notify);
}
public void OnFileDownloadProgress(ImageDownloadInformation file)
{
//adapter.data = downloadServiceData;
//Log.Debug("DownloadActivity", "OnFileDownloadProgress " + file.src.original);
RunOnUiThread(notify);
}
public void OnFileDownloadError(ImageDownloadInformation file, string error)
{
File.Delete(file.des);
//adapter.data = downloadServiceData;
RunOnUiThread(notify);
}
private bool downloadFile(ImageDownloadInformation file)
{
listener?.OnNewFileDownloadStarted(file); //new file download started
file.isDownloading = true;
bool downloaded = true;
Stream input = null;
FileStream output = null;
HttpURLConnection connection = null;
int skeep = 10;
int callCount = 0;
try
{
URL url = new URL(file.src.original);
connection = (HttpURLConnection)url.OpenConnection();
connection.Connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
if (connection.ResponseCode != HttpStatus.Ok)
{
throw new Exception("Server returned HTTP " + connection.ResponseCode + " " + connection.ResponseMessage);
}
int fileTotalLength = connection.ContentLength;
file.totalSize = fileTotalLength;
input = connection.InputStream;
output = new FileStream(file.des, FileMode.CreateNew, FileAccess.Write, FileShare.Read);
byte[] data = new byte[4096];
int current = 0;
int oSize = 1;
while (oSize > 0)
{
// allow canceling
if (isForcedStopDownload)
{
output.Close();
File.Delete(file.des); //delete the current not completed file
downloaded = false;
break;
}
oSize = input.Read(data, 0, data.Length - 1); //read data from web
current += oSize;
file.currentSize = current;
// publishing the progress....
if (fileTotalLength > 0 && callCount % skeep == 0) // only if total length is known
{
listener?.OnFileDownloadProgress(file);
}
callCount++;
output.Write(data, 0, oSize);
Thread.Sleep(1);
}
}
catch (Exception ex)
{
try
{
if (output != null)
{
output.Close();
}
}
catch (Exception) { }
file.isDownloading = false;
file.isFailed = true;
listener.OnFileDownloadError(file, ex.Message);
downloaded = false;
}
finally
{
try
{
if (input != null)
{
input.Close();
}
if (output != null)
{
output.Close();
}
}
catch (Exception) { }
if (connection != null)
{
connection.Disconnect();
}
}
if (downloaded)
{
file.isFinished = true;
file.isDownloading = false;
listener?.OnFileDownloadSuccessful(file);
}
return(downloaded);
}