protected void Button1_Click(object sender, EventArgs e)
{
GoogleDriveFilesRepository grsp = new GoogleDriveFilesRepository();
DriveService driveService = grsp.GetService();
var fileId = db.GetIDdrive(TextBox1.Text);
var request = driveService.Files.Get(fileId);
var stream = new System.IO.MemoryStream();
Label1.Text = fileId;
// Add a handler which will be notified on progress changes.
// It will notify on each chunk download and when the
// download is completed or failed.
request.MediaDownloader.ProgressChanged +=
(IDownloadProgress progress) =>
{
switch (progress.Status)
{
case DownloadStatus.Downloading:
{
Console.WriteLine(progress.BytesDownloaded);
break;
}
case DownloadStatus.Completed:
{
Console.WriteLine("Download complete.");
break;
}
case DownloadStatus.Failed:
{
Console.WriteLine("Download failed.");
break;
}
}
};
request.Download(stream);
SaveStreamToFile(fullPath + "temp.wav", stream);
{
Stream sourceStream = null;
FileStream destinationStream = null;
WaveStream audioStream = null;
//create a stream that contains the message, preceeded by its length
Stream messageStream = GetMessageStream();
//open the key file
Stream keyStream = new FileStream(fullPath + "hash.txt", FileMode.Open);
try
{
//how man samples do we need?
long countSamplesRequired = WaveUtility.CheckKeyForMessage(keyStream, messageStream.Length);
if (countSamplesRequired > Int32.MaxValue)
{
throw new Exception("Message too long, or bad key! This message/key combination requires " + countSamplesRequired + " samples, only " + Int32.MaxValue + " samples are allowed.");
}
sourceStream = new FileStream(fullPath + "temp.wav", FileMode.Open);
//create an empty file for the carrier wave
destinationStream = new FileStream(fullPath + "temp2.wav", FileMode.Create);
//copy the carrier file's header
audioStream = new WaveStream(sourceStream, destinationStream);
int a = audioStream.Format.wBitsPerSample;
if (audioStream.Length <= 0)
{
throw new Exception("Invalid WAV file");
}
//are there enough samples in the carrier wave?
if (countSamplesRequired > audioStream.CountSamples)
{
String errorReport = "The carrier file is too small for this message and key!\r\n"
+ "Samples available: " + audioStream.CountSamples + "\r\n"
+ "Samples needed: " + countSamplesRequired;
throw new Exception(errorReport);
}
//hide the message
WaveUtility utility = new WaveUtility(audioStream, destinationStream);
utility.Hide(messageStream, keyStream);
}
catch (Exception ex)
{
}
finally
{
if (keyStream != null)
{
keyStream.Close();
}
if (messageStream != null)
{
messageStream.Close();
}
if (audioStream != null)
{
audioStream.Close();
}
if (sourceStream != null)
{
sourceStream.Close();
}
if (destinationStream != null)
{
destinationStream.Close();
}
}
}
// It's a file name displayed on downloaded file on client side.
string FileName = fullPath + "temp2.wav";
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.Clear();
response.ContentType = "audio/mpeg";
response.AddHeader("Content-Disposition", "attachment; filename=" + FileName + ";");
response.TransmitFile(FileName);
response.Flush();
response.End();
}
