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Merged
mateof merged 1 commit into from
Sep 6, 2025
Merged

feat: add media streaming from telegram #32

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234 changes: 232 additions & 2 deletions TelegramDownloader/Controllers/FileController.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,13 +9,16 @@
using Syncfusion.Blazor.Inputs;
using Syncfusion.EJ2.FileManager.Base;
using Syncfusion.EJ2.FileManager.PhysicalFileProvider;
using Syncfusion.EJ2.Notifications;
using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Net;
using System.Net.Http.Headers;
using System.Runtime.Serialization.Formatters.Binary;
using System.Web;
using System.Xml.Linq;
using TelegramDownloader.Data;
using TelegramDownloader.Data.db;
Expand Down Expand Up @@ -234,15 +237,15 @@ public async Task<IActionResult> GetImage(string path)
}

[Route("GetFile/{id}")]
public async Task<IActionResult> GetFile(string id, string? idChannel, string? idFile )
public async Task<IActionResult> GetFile(string id, string? idChannel, string? idFile)
{
var fileName = id;
var mimeType = FileService.getMimeType(id.Split(".").Last());
var file = _fs.ExistFileIntempFolder($"{idChannel}-{idFile}-{id}");
if ( file == null )
{
// HttpResponseMessage fullResponse = new HttpResponseMessage(HttpStatusCode.OK); // Request.CreateResponse(HttpStatusCode.OK);
Message idM = await _ts.getMessageFile(idChannel, Convert.ToInt32(idFile));
TL.Message idM = await _ts.getMessageFile(idChannel, Convert.ToInt32(idFile));
ChatMessages cm = new ChatMessages();
cm.message = idM;
file = new FileStream(System.IO.Path.Combine(FileService.TEMPDIR, "_temp", $"{idChannel}-{idFile}-{id}"), FileMode.Create, FileAccess.ReadWrite);
Expand All @@ -253,13 +256,240 @@ public async Task<IActionResult> GetFile(string id, string? idChannel, string? i
await _ts.DownloadFileAndReturn(cm, file, model: dm);
file.Position = 0;
}
var request = HttpContext.Request;
var rangeHeader = request.Headers["Range"].ToString();

return new FileStreamResult(file, mimeType)
{
FileDownloadName = fileName,
EnableRangeProcessing = true

};
}

[Route("GetFileStream/{idChannel}/{idFile}/{name}")]
public async Task<IActionResult> GetFileStream(string idChannel, string idFile, string name)
{
var fileName = name;
var mimeType = FileService.getMimeType(name.Split(".").Last());

var request = HttpContext.Request;
var rangeHeader = request.Headers["Range"].ToString();

var file = await _fs.getItemById(idChannel, idFile);

TL.Message idM = await _ts.getMessageFile(idChannel, file.MessageId ?? file.ListMessageId.FirstOrDefault());

long totalLength = 0; // (await _fs.getItemById(idChannel, idFile)).Size;

if(idM.media is MessageMediaDocument { document: Document document })
{
totalLength = document.size;
}

long from = 0;
long initialFrom = 0;
long to = 0;

if (!string.IsNullOrEmpty(rangeHeader) && rangeHeader.StartsWith("bytes="))
{
var range = rangeHeader.Replace("bytes=", "").Split('-');
from = long.Parse(range[0]);
initialFrom = from;
if (range.Length > 1 && !string.IsNullOrEmpty(range[1]))
to = long.Parse(range[1]);
}

if (from > 0)
{
from = (from / 524288) * 524288;
}

Console.WriteLine("Fom:" + from);

if (to == 0)
if (string.IsNullOrEmpty(rangeHeader) || from == 0)
to = (12 * 524288) + from;
else
to = (5 * 524288) + from;
else
to = ((to + 524288) / 524288) * 524288;

if (to > totalLength)
{
to = totalLength;
}

if (totalLength == initialFrom)
{
Response.StatusCode = 416; // Range Not Satisfiable
Response.Headers["Content-Range"] = $"bytes */{totalLength}";
return new EmptyResult();
}

long length = to - from;
//Console.WriteLine("To length: " + to);
//Console.WriteLine("future download length: " + length);

byte[] data = await _ts.DownloadFileStream(idM, from, (int)length);

//Console.WriteLine("Total download length: " + data.Length);

long skipedBytes = initialFrom - from - (length - data.Length);

if (skipedBytes < 0) skipedBytes = 0;

if (skipedBytes > data.Length)
return StatusCode(500, "No hay suficientes bytes en el bloque descargado");

long dataLength = data.Length - skipedBytes;
Response.ContentLength = dataLength; //(dataLength + initialFrom) >= totalLength ? totalLength - initialFrom : dataLength;
// Response.StatusCode = (int)HttpStatusCode.PartialContent; // 206
Response.StatusCode = StatusCodes.Status206PartialContent; // StatusCodes.Status206PartialContent;
Response.ContentType = mimeType;
Response.Headers["Content-Disposition"] = $"inline; filename=\"{HttpUtility.UrlEncode(fileName)}\"";
Response.Headers.Add("Content-Range", $"bytes {(initialFrom >= totalLength ? totalLength - 1 : initialFrom)}-{(initialFrom >= totalLength ? totalLength - 1 : initialFrom + Response.ContentLength - 1)}/{totalLength}");
Response.Headers.Add("Accept-Ranges", "bytes");

//if (Request.Headers.ContainsKey("Range"))
//{
// Console.WriteLine("Range header recibido:");
// Console.WriteLine(Request.Headers["Range"]);
//}

//foreach (var header in Response.Headers)
//{
// Console.WriteLine($"{header.Key}: {header.Value}");
//}


// Console.WriteLine("Skiped bytes: " + skipedBytes);

var stream = new MemoryStream(data, (int)skipedBytes, (int)Response.ContentLength);
stream.Position = 0;

// Console.WriteLine("Real Data length: " + stream.Length);

// Console.WriteLine("---------------------------------------------------");

var cancellationToken = HttpContext.RequestAborted;

try
{
await stream.CopyToAsync(Response.Body, 64 * 1024, cancellationToken);
await Response.Body.FlushAsync(cancellationToken);

return new EmptyResult();
}
catch (OperationCanceledException)
{
Console.WriteLine("❌ El cliente cerró la conexión.");
}

return new EmptyResult();

}

[Route("GetFileStream2/{idChannel}/{idFile}/{name}")]
public async Task<IActionResult> GetFileStream2(string idChannel, string idFile, string name)
{
var fileName = name;
var mimeType = FileService.getMimeType(name.Split(".").Last());

var request = HttpContext.Request;
var rangeHeader = request.Headers["Range"].ToString();

var file = await _fs.getItemById(idChannel, idFile);

// HttpResponseMessage fullResponse = new HttpResponseMessage(HttpStatusCode.OK); // Request.CreateResponse(HttpStatusCode.OK);
TL.Message idM = await _ts.getMessageFile(idChannel, file.MessageId ?? file.ListMessageId.FirstOrDefault());
//byte[] data = await _ts.DownloadFileStream(idM, 0, 512);
//var stream = new MemoryStream(data);

// Supón que puedes obtener el tamaño total del archivo remoto
long totalLength = (await _fs.getItemById(idChannel, idFile)).Size;

long from = 0;
long initialFrom = 0;
long to = 0;



if (!string.IsNullOrEmpty(rangeHeader) && rangeHeader.StartsWith("bytes="))
{
var range = rangeHeader.Replace("bytes=", "").Split('-');
from = long.Parse(range[0]);
initialFrom = from;
if (range.Length > 1 && !string.IsNullOrEmpty(range[1]))
to = long.Parse(range[1]);
}

if (from > 0)
{
from = (from / 524288) * 524288;
}

if (to == 0)
to = (25 * 524288) + from;
else
to = ((to + 524288) / 524288) * 524288;

if (to > totalLength)
{
to = totalLength - 1;
}

long length = to - from;

byte[] data = await _ts.DownloadFileStream(idM, from, (int)length);

long skipedBytes = initialFrom - from; // (data.Length + initialFrom) >= totalLength ? data.Length - (totalLength - initialFrom) : initialFrom - from;

if (skipedBytes < 0) skipedBytes = 0;

if (skipedBytes >= data.Length)
return StatusCode(500, "No hay suficientes bytes en el bloque descargado");

long dataLength = data.Length - skipedBytes;
Response.ContentLength = (dataLength + initialFrom) >= totalLength ? totalLength - initialFrom : dataLength;
// Response.StatusCode = (int)HttpStatusCode.PartialContent; // 206
Response.StatusCode = StatusCodes.Status206PartialContent;
Response.ContentType = mimeType;
Response.Headers.Add("Content-Range", $"bytes {initialFrom}-{(initialFrom + Response.ContentLength - 1)}/{totalLength}");
Response.Headers.Add("Accept-Ranges", "bytes");

if (Request.Headers.ContainsKey("Range"))
{
Console.WriteLine("Range header recibido:");
Console.WriteLine(Request.Headers["Range"]);
}

foreach (var header in Response.Headers)
{
Console.WriteLine($"{header.Key}: {header.Value}");
}




var stream = new MemoryStream(data, (int)skipedBytes, (int)Response.ContentLength);

Console.WriteLine("Real Data length: " + stream.Length);

Console.WriteLine("---------------------------------------------------");

//return new FileStreamResult(stream, mimeType);
var cancellationToken = HttpContext.RequestAborted;

await stream.CopyToAsync(Response.Body, 64 * 1024, cancellationToken);
await Response.Body.FlushAsync(cancellationToken);

return new EmptyResult();
// return File(stream, mimeType, enableRangeProcessing: false);
//return new FileStreamResult(stream, mimeType)
//{
// EnableRangeProcessing = false
//};

}

Expand Down
2 changes: 1 addition & 1 deletion TelegramDownloader/Data/FileService.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -117,7 +117,7 @@ public class FileService : IFileService
{"mid", "audio/midi"},
{"midi", "audio/midi"},
{"mif", "application/vnd.mif"},
{"mkv", "video/webm" },
{"mkv", "video/x-matroska" },
{"mov", "video/quicktime"},
{"movie", "video/x-sgi-movie"},
{"mp2", "audio/mpeg"},
Expand Down
1 change: 1 addition & 0 deletions TelegramDownloader/Data/ITelegramService.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ public interface ITelegramService
Task joinChatInvitationHash(string? hash);
Task<User> CallQrGenerator(Action<string> func, CancellationToken ct, bool logoutFirst = false);
Task<string> DownloadFile(ChatMessages message, string fileName = null, string folder = null, DownloadModel model = null, bool shouldAddToList = false);
Task<Byte[]> DownloadFileStream(Message message, long offset, int limit);
Task<Stream> DownloadFileAndReturn(ChatMessages message, Stream ms = null, string fileName = null, string folder = null, DownloadModel model = null);
Task<List<ChatViewBase>> GetFouriteChannels(bool mustRefresh = true);
Task AddFavouriteChannel(long id);
Expand Down
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