public async Task <IHttpActionResult> DownloadCourseModuleClip(string clipname, ClipToSave clipToSave)
{
ClipDownloadData clipUrl = null;
// 1- get the video clip url to download.
try
{
clipUrl = GetClipUrl(clipToSave);
// 2- make sure the folders structure exist.
var videoSaveDirectory = SetUpVideoFolderStructure(clipToSave.CourseTitle, clipToSave.ModuleTitle, clipToSave);
// 2b- create course information, if missing
SaveCourseInformation(clipToSave);
// 3- download the video and report progress back.
int receivedBytes = 0;
long totalBytes = 0;
var videoFileName = ((clipToSave.ClipIndex + 1).ToString("D2") + " - " + clipToSave.Title + ".mp4").ToValidFileName();
var videoSaveLocation = videoSaveDirectory.FullName + "\\raw-" + videoFileName;
using (var client = new WebClient())
using (var regStream = await client.OpenReadTaskAsync(clipUrl.URLs[0].URL))
using (var stream = new ThrottledStream(regStream, 115200))
{
byte[] buffer = new byte[1024];
totalBytes = Int32.Parse(client.ResponseHeaders[HttpResponseHeader.ContentLength]);
stream.MaximumBytesPerSecond = GetClipMaxDownloadSpeed(clipToSave.DurationSeconds, totalBytes);
using (var fileStream = File.OpenWrite(videoSaveLocation))
{
for (;;)
{
int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
if (bytesRead == 0)
{
await Task.Yield();
break;
}
receivedBytes += bytesRead;
var progress = new ProgressArgs()
{
Id = clipToSave.Name,
BytesReceived = receivedBytes,
FileName = videoFileName,
TotalBytes = totalBytes,
IsDownloading = true,
Extra = new { clipToSave.ModuleIndex, clipToSave.ClipIndex }
};
fileStream.Write(buffer, 0, bytesRead);
var hubContext = GlobalHost.ConnectionManager.GetHubContext <ProgressHub>();
hubContext.Clients.All.updateProgress(progress);
}
}
}
// 4- save the video file.
var inputFile = new MediaFile {
Filename = videoSaveLocation
};
var outputFile = new MediaFile {
Filename = videoSaveDirectory.FullName + "\\" + videoFileName
};
if (File.Exists(outputFile.Filename))
{
File.Delete(outputFile.Filename);
}
File.Move(inputFile.Filename, outputFile.Filename);
// 5- Create srt files
if (Constants.SUBTITLES)
{
var srtFilename = outputFile.Filename.Substring(0, outputFile.Filename.Length - 4) + ".srt";
var srtString = clipToSave.TranscriptClip.GetSrtString(clipToSave.DurationSeconds);
if (srtString.Length > 4)
{
File.WriteAllText(srtFilename, srtString);
HandleEmbeddedSubtitles(outputFile.Filename, srtFilename);
}
}
return(Ok(new ProgressArgs()
{
Id = clipToSave.Name,
BytesReceived = receivedBytes,
FileName = videoFileName,
TotalBytes = totalBytes,
IsDownloading = false,
Extra = new { clipToSave.ModuleIndex, clipToSave.ClipIndex }
}));
}
catch (Exception exception)
{
return(HandleException(exception));
}
}
private async void SaveCourseInformation(CourseSimpleClip clip)
{
String courseName = clip.ID.Substring(0, clip.ID.IndexOf("|"));
Course course = null;
courses.TryGetValue(courseName, out course);
if (course == null)
{
return;
}
var descriptionFile = GetBaseFolderStructure(course.Title) + "\\description.txt";
var levelFile = GetBaseFolderStructure(course.Title) + "\\level.txt";
var authorsFile = GetBaseFolderStructure(course.Title) + "\\authors.txt";
var dateFile = GetBaseFolderStructure(course.Title) + "\\date.txt";
var excerciceFile = GetBaseFolderStructure(course.Title) + "\\" + course.Title.ToValidFileName() + "-excercice.zip";
if (!File.Exists(descriptionFile))
{
File.WriteAllText(descriptionFile, course.Description);
}
if (!File.Exists(levelFile))
{
File.WriteAllText(levelFile, course.Level);
}
if (!File.Exists(dateFile))
{
File.WriteAllText(dateFile, DateTime.Parse(course.ReleaseDate).ToString("dd/MM/yyyy"));
}
if (!File.Exists(authorsFile))
{
String separator = "";
String authors = "";
foreach (Author author in course.Authors)
{
authors = separator + author.FirstName + " " + author.LastName;
separator = ", ";
}
File.WriteAllText(authorsFile, String.Join(", ", authors));
}
if (!File.Exists(excerciceFile))
{
if (course.ExerciseFiles != null)
{
try
{
using (var client = new WebClient())
using (var regStream = await client.OpenReadTaskAsync(course.ExerciseFiles.exerciseFilesUrl))
using (var stream = new ThrottledStream(regStream, 115200))
{
byte[] buffer = new byte[1024];
using (var fileStream = File.OpenWrite(excerciceFile))
{
for (;;)
{
int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
if (bytesRead == 0)
{
await Task.Yield();
break;
}
fileStream.Write(buffer, 0, bytesRead);
}
}
}
} catch
{
}
}
}
}
public async Task<IHttpActionResult> DownloadCourseModuleClip(string clipname, ClipToSave clipToSave)
{
string clipUrl = string.Empty;
// 1- get the video clip url to download.
try
{
clipUrl = GetClipUrl(clipToSave);
// 2- make sure the folders structure exist.
var videoSaveDirectory = SetUpVideoFolderStructure(clipToSave.CourseTitle,
(clipToSave.ModuleIndex + 1).ToString("D2") + " - " + clipToSave.ModuleTitle,
(clipToSave.ClipIndex + 1).ToString("D2") + " - " + clipToSave.Title);
// 3- download the video and report progress back.
int receivedBytes = 0;
long totalBytes = 0;
var videoFileName = ((clipToSave.ClipIndex + 1).ToString("D2") + " - " + clipToSave.Title + ".mp4").ToValidFileName();
var videoSaveLocation = videoSaveDirectory.FullName + "\\raw-" + videoFileName;
using (var client = new WebClient())
using (var regStream = await client.OpenReadTaskAsync(clipUrl))
using (var stream = new ThrottledStream(regStream, 115200))
{
byte[] buffer = new byte[1024];
totalBytes = Int32.Parse(client.ResponseHeaders[HttpResponseHeader.ContentLength]);
stream.MaximumBytesPerSecond = GetClipMaxDownloadSpeed(clipToSave.DurationSeconds, totalBytes);
using (var fileStream = File.OpenWrite(videoSaveLocation))
{
for (;;)
{
int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
if (bytesRead == 0)
{
await Task.Yield();
break;
}
receivedBytes += bytesRead;
var progress = new ProgressArgs()
{
Id = clipToSave.Name,
BytesReceived = receivedBytes,
FileName = videoFileName,
TotalBytes = totalBytes,
IsDownloading = true,
Extra = new { clipToSave.ModuleIndex, clipToSave.ClipIndex }
};
fileStream.Write(buffer, 0, bytesRead);
var hubContext = GlobalHost.ConnectionManager.GetHubContext<ProgressHub>();
hubContext.Clients.All.updateProgress(progress);
}
}
}
// 4- save the video file.
var inputFile = new MediaFile { Filename = videoSaveDirectory.FullName + "\\raw-" + videoFileName };
var outputFile = new MediaFile { Filename = videoSaveDirectory.FullName + "\\" + videoFileName };
File.Move(inputFile.Filename, outputFile.Filename);
// 5- Create srt files
if (Constants.SUBTITLES)
{
var srtFilename = outputFile.Filename.Substring(0, outputFile.Filename.Length - 4) + ".srt";
var srtString = clipToSave.TranscriptClip.GetSrtString(clipToSave.DurationSeconds);
File.WriteAllText(srtFilename, srtString);
}
return Ok(new ProgressArgs()
{
Id = clipToSave.Name,
BytesReceived = receivedBytes,
FileName = videoFileName,
TotalBytes = totalBytes,
IsDownloading = false,
Extra = new { clipToSave.ModuleIndex, clipToSave.ClipIndex }
});
}
catch (Exception exception)
{
return HandleException(exception);
}
}
