async Task DownloadAsync()
{
byte[] file = Array.Empty <byte>();
// Generate a text file
if (ToDownload is not null)
{
file = System.Text.Encoding.UTF8.GetBytes(JsonSerializer.Serialize <T>(ToDownload));
}
if (BlazorDownloadFileService is not null)
{
await BlazorDownloadFileService.DownloadFileAsync(Filename, file);
}
}
public void ExportBrief(IEnumerable <Card> deck)
{
Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);
Table table = builder.StartTable();
foreach (Card c in deck)
{
builder.InsertCell();
if (c.Question == null)
{
builder.Write("");
}
else
{
builder.Write(c.Question);
}
// Build the second cell
builder.InsertCell();
if (c.Answer == null)
{
builder.Write("");
}
else
{
builder.Write(c.Answer);
}
// Call the following method to end the row and start a new row.
builder.EndRow();
}
table.SetBorders(LineStyle.None, 0, Color.White);;
// Signal that we have finished building the table.
builder.EndTable();
MemoryStream dstStream = new MemoryStream();
doc.Save(dstStream, SaveFormat.Docx);
BlazorDownloadFileService.DownloadFile("out.docx", dstStream, "application/octet-stream");
}
public async Task OnClickDownloadViaHttpClientButton()
{
// Please imagine the situation that the downloading files API is protected by
// token-based authorization (not cookie-based authorization).
// In that case, the user can not download it from the href link of the anchor tag directly.
// In this scenario, the application has to get a byte array of the file from
// the API endpoint by HttpClient with token and make the byte array can be downloadable.
var fileName = "/Users/themakers/Documents/PREDICAS/archivo1.PDF";//"/Users/themakers/Documents/PREDICAS/Nivel Biblico 1.pdf";
using var call = FileClient.DownloadStream(new FileRequest { Path = fileName });
// var bytes = await HttpClient.GetByteArrayAsync("pictures/1");
try
{
var result = new StringBuilder();
Console.WriteLine("Descargando archivo.");
await foreach (var message in call.ResponseStream.ReadAllAsync())
{
result.Append(Encoding.UTF8.GetString(message.Content.ToByteArray()));
}
// byte[] file = Encoding.ASCII.GetBytes(result.ToString());
Console.WriteLine("iniciando descarga local archivo.");
// int bufferSize =65536;// 32768; new MemoryStream(Convert.FromBase64String(Base64Nyan)), "application/octet-stream"))>Dowload Nyan From Stream</button>
// string contentType = "application/octet-stream";
await BlazorDownloadFileService.DownloadFile("nombrearchivo.pdf",
new MemoryStream(Convert.FromBase64String(result.ToString())), "application/pdf");
// await JSRuntime.SaveAs( fileName, Convert.FromBase64String(result.ToString()));
Console.WriteLine("termina descarga ");
}
catch (Exception ex)
{
Console.WriteLine($"DownloadFile Exception => Message {ex.Message} - InnerExceptionMessage {(ex.InnerException != null ? ex.InnerException.Message : "No InnerException")}");
}
}
private async void btnDownload_Click()
{
var file = SelectedItem as FileInfo;
if (file == null)
{
return;
}
if (DownloadFileAction != null)
{
DownloadFileAction.Invoke(JSRuntime, file.FullName);
return;
}
System.Threading.CancellationTokenSource cts = new System.Threading.CancellationTokenSource();
loading.Show(TextDownload, file.Name, false, cts.Cancel);
var stopwatch = new System.Diagnostics.Stopwatch();
stopwatch.Start();
DateTime lastDisplayTime = DateTime.MinValue;
byte[] buffer = new byte[24 * 1024];
var fileSize = file.Length;
long readTotalCount = 0;
try
{
using (var fs = file.OpenRead())
{
while (!cts.IsCancellationRequested)
{
var ret = fs.Read(buffer, 0, buffer.Length);
if (ret <= 0)
{
break;
}
readTotalCount += ret;
if ((DateTime.Now - lastDisplayTime).TotalSeconds > 0.5 && stopwatch.ElapsedMilliseconds > 0)
{
StringBuilder sb = new StringBuilder();
var speed = Convert.ToDouble(readTotalCount / stopwatch.ElapsedMilliseconds);
sb.Append(TextTransferSpeed + ": " + storageUSC.GetString(Convert.ToDecimal(speed * 1000), 1, true) + "B/s");
var remainingTime = TimeSpan.FromMilliseconds((fileSize - readTotalCount) / speed);
sb.Append("," + TextRemainingTime + ": " + remainingTime.ToString(@"hh\:mm\:ss"));
loading.UpdateProgress(Convert.ToInt32(readTotalCount * 100 / fileSize), sb.ToString());
await InvokeAsync(StateHasChanged);
lastDisplayTime = DateTime.Now;
}
await BlazorDownloadFileService.AddBuffer(new ArraySegment <byte>(buffer, 0, ret), cts.Token);
}
}
if (cts.IsCancellationRequested)
{
alert.Show(TextUpload, TextCanceled);
return;
}
var result = await BlazorDownloadFileService.DownloadBinaryBuffers(file.Name, cts.Token);
if (!result.Succeeded)
{
alert.Show(TextDownload, TextFailed + Environment.NewLine + result.ErrorName + Environment.NewLine + result.ErrorMessage);
}
}
catch (TaskCanceledException)
{
alert.Show(TextUpload, TextCanceled);
}
catch (Exception ex)
{
alert.Show(TextUpload, TextFailed + Environment.NewLine + ExceptionUtils.GetExceptionMessage(ex));
}
finally
{
await BlazorDownloadFileService.ClearBuffers();
stopwatch.Stop();
loading.Close();
}
}
async Task DownloadFileAsync()
{
if (CheckedAudioOnlyStreamInfoHashCode == NoSelection)
{
return;
}
Progress = 0;
DownloadButtonEnabled = false;
try
{
var streamInfo = AudioOnlyStreamInfos.Single(x => x.GetHashCode() == CheckedAudioOnlyStreamInfoHashCode);
var x = new Stopwatch();
x.Reset();
x.Start();
// bool oggOpusIsExtractedByServer = false;
Stream stream;
if (streamInfo.IsOpus() && ExtractOpus)
{
stream = await YouTubeDownloadApi.GetOggOpusAudioStreamAsync(streamInfo);
// oggOpusIsExtractedByServer = true;
x.Stop();
Console.WriteLine("GetOggOpusAudioStreamAsync = " + x.Elapsed);
}
else
{
stream = await YouTubeDownloadApi.GetAudioStreamAsync(streamInfo);
x.Stop();
Console.WriteLine("GetAudioStreamAsync = " + x.Elapsed);
}
var filename = GetFileNameWithExtension(streamInfo);
x.Reset();
x.Start();
using var memoryStream = new MemoryStream();
long lastValue = 0;
await stream.CopyToAsync(memoryStream, async (e) =>
{
Progress = 100 * e.TotalBytesRead / e.SourceLength;
if (Progress != lastValue)
{
lastValue = Progress;
StateHasChanged();
await Task.Delay(5); // give the UI some time to catch up
}
});
x.Stop();
Console.WriteLine("CopyToAsync = " + x.Elapsed);
//byte[] array;
//if (OpusAudioStreamPresent && ExtractOpus && !oggOpusIsExtractedByServer)
//{
// using var opusStream = new MemoryStream();
// x.Start();
// memoryStream.Position = 0;
// MatroskaDemuxer.ExtractOggOpusAudio(memoryStream, opusStream);
// Console.WriteLine("ExtractOggOpusAudio and ToArray = " + x.Elapsed);
// array = opusStream.ToArray();
// x.Stop();
//}
//else
//{
// x.Start();
// array = memoryStream.ToArray();
// x.Stop();
// Console.WriteLine("ToArray = " + x.Elapsed);
//}
x.Reset();
x.Start();
byte[] array = memoryStream.ToArray();
x.Stop();
Console.WriteLine("ToArray = " + x.Elapsed);
x.Reset();
x.Start();
await BlazorDownloadFileService.DownloadFileAsync(filename, array);
x.Stop();
Console.WriteLine("Download = " + x.Elapsed);
}
finally
{
DownloadButtonEnabled = true;
}
}
protected async Task GenerarClaves()
{
Byte[] ficheroZip = ServicioSeguridad.GenerarClavesRSA();
await BlazorDownloadFileService.DownloadFile("claves_rsa.zip", Convert.ToBase64String(ficheroZip));
}