public async Task AddChunkFile(long userId, byte[] chunk, FlowUploadForm flow)
{
string filename = _createChunkFile(userId, flow.flowChunkNumber, flow.flowIdentifier);
for (int i = 1; i <= NumberOfRetries; ++i)
{
try
{
using (FileStream fs = File.Open(filename, FileMode.Open, FileAccess.Write))
{
await fs.WriteAsync(chunk, 0, chunk.Length);
fs.Flush();
fs.Dispose();
}
break;
}
catch (IOException e)
{
if (i == NumberOfRetries)
{
throw;
}
Thread.Sleep(DelayOnRetry);
}
}
}
private void _deleteChunkFiles(long userId, FlowUploadForm flow)
{
for (int chunkNumber = 1; chunkNumber <= flow.flowTotalChunks; chunkNumber++)
{
var chunkFileName = _getChunkFileName(userId, chunkNumber, flow.flowIdentifier);
File.Delete(chunkFileName);
}
}
public async Task <IActionResult> MovieUpload(FlowUploadForm flow, NewMovieForm newMovie)
{
var userId = TokenManager.ExtractUserId(User.Claims);
try
{
foreach (var formFile in Request.Form.Files)
{
using (var readStream = formFile.OpenReadStream())
using (var binaryReader = new BinaryReader(readStream))
{
var fileContent = binaryReader.ReadBytes((int)formFile.Length);
await _uploadService.AddChunkFile(userId, fileContent, flow);
}
if (_uploadService.AttemptCompleteFileCreation(userId, flow, formFile.FileName, out FileMetadata metadata))
{
newMovie.ResolveMovieImage(_externalDB);
metadata.GetDuration(new MediaManager());
var movieEntity = newMovie.MapToEntity(userId, metadata.MapToVideoFileEntity());
movieEntity.DateCreated = DateTime.Now;
movieEntity = _movieRpository.Add(movieEntity);
//If file is not mp4. it cannot be streamed properly to a browser so convert it
//This process takes a while. Consider moveing this out of the flow
if (movieEntity.VideoFile.FileExtension != ".mp4")
{
_videoConverter.AddVideoToQueue(movieEntity.VideoFile);
}
return(Created($"api/movies/{movieEntity.MovieId}", MovieResponse.MapFromObject(movieEntity)));
}
}
}
catch
{
return(StatusCode(500, "There was an Error Uploading the File"));
}
return(Ok());
}
public bool AttemptCompleteFileCreation(long userId, FlowUploadForm flow, string filename, out FileMetadata fileinfo)
{
if (_allChunksArrived(userId, flow.flowTotalChunks, flow.flowIdentifier))
{
var tempFileName = _combineChunkFiles(userId, flow);
var finalFilename = _createFinalPath(userId, filename);
finalFilename = FileMetadata.VerifyFileUniqueness(finalFilename);
File.Move(tempFileName, finalFilename);
_deleteChunkFiles(userId, flow);
fileinfo = new FileMetadata(finalFilename);
return(true);
}
//File not yet ready to be reconstituted
fileinfo = null;
return(false);
}
private string _combineChunkFiles(long userId, FlowUploadForm flow)
{
var tempFileName = Path.Combine(root, "temp", userId.ToString(), flow.flowIdentifier);
for (int i = 1; i <= NumberOfRetries; ++i)
{
try
{
using (var destStream = File.Create(tempFileName, 15000))
{
for (int chunkNumber = 1; chunkNumber <= flow.flowTotalChunks; chunkNumber++)
{
var chunkFileName = _getChunkFileName(userId, chunkNumber, flow.flowIdentifier);
using (var sourceStream = File.OpenRead(chunkFileName))
{
sourceStream.CopyTo(destStream);
}
}
}
break;
}
catch (IOException e)
{
// You may check error code to filter some exceptions, not every error
// can be recovered.
if (i == NumberOfRetries) // Last one, (re)throw exception and exit
{
throw;
}
Thread.Sleep(DelayOnRetry);
}
}
return(tempFileName);
}
