public async Task <string> DownloadVideo(Video arg, FileUploadProcessHandler handler)
{
if (arg.Constructor == Constructor.videoEmpty)
{
return(null);
}
VideoConstructor video = (VideoConstructor)arg;
TLApi api = await session.GetFileSession(video.dc_id);
InputFileLocation inputFile = TL.inputVideoFileLocation(video.id, video.access_hash);
string videoPath = GetVideoPath(video);
string tempVideoPath = videoPath + ".tmp";
int allSize = video.size;
int chunkSize = 128 * 1024;
int chunksCount = allSize / chunkSize;
int lastChunkSize = allSize - chunkSize * chunksCount;
int allChunksCount = chunksCount + (lastChunkSize != 0 ? 1 : 0);
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication()) {
if (storage.FileExists(videoPath))
{
return(videoPath);
}
using (Stream stream = new IsolatedStorageFileStream(tempVideoPath, FileMode.OpenOrCreate, FileAccess.Write, storage)) {
for (int i = 0; i < chunksCount; i++)
{
handler((float)i * (float)chunkSize / (float)allSize);
Upload_fileConstructor chunk = (Upload_fileConstructor)await api.upload_getFile(inputFile, i *chunkSize, chunkSize);
stream.Write(chunk.bytes, 0, chunk.bytes.Length);
}
if (lastChunkSize != 0)
{
handler((float)chunksCount * (float)chunkSize / (float)allSize);
Upload_fileConstructor lastChunk = (Upload_fileConstructor)await api.upload_getFile(inputFile, chunksCount *chunkSize, lastChunkSize);
stream.Write(lastChunk.bytes, 0, lastChunk.bytes.Length);
}
handler(1.0f);
}
if (storage.FileExists(videoPath))
{
storage.DeleteFile(videoPath);
}
storage.MoveFile(tempVideoPath, videoPath);
}
return(videoPath);
}
public async Task <string> GetFile(FileLocation fileLocation)
{
logger.debug("Getting file {0}", fileLocation);
if (fileLocation.Constructor == Constructor.fileLocation)
{
FileLocationConstructor location = (FileLocationConstructor)fileLocation;
string filePath = FileLocationToCachePath(location);
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication()) {
if (!storage.DirectoryExists("cache"))
{
storage.CreateDirectory("cache");
}
if (storage.FileExists(filePath))
{
logger.debug("Getting file {0} from cache", filePath);
return(filePath);
}
TLApi api = await session.GetFileSession(location.dc_id);
logger.debug("Got file session for dc {0}", location.dc_id);
Upload_fileConstructor file = (Upload_fileConstructor)await api.upload_getFile(TL.inputFileLocation(location.volume_id, location.local_id, location.secret), 0, int.MaxValue);
logger.debug("File constructor found");
using (Stream fileStream = new IsolatedStorageFileStream(filePath, FileMode.OpenOrCreate,
FileAccess.Write, storage)) {
await fileStream.WriteAsync(file.bytes, 0, file.bytes.Length);
}
logger.debug("File saved successfully");
return(filePath);
}
}
else
{
throw new MTProtoFileUnavailableException();
}
}
//Limit req: value % 1024
public async Task <Upload_fileConstructor> GetFile(InputFileLocation ifl, int size, int limit = 1024)
{
var result = new Upload_fileConstructor();
result.bytes = new byte[size];
GetFileRequest req;
for (int recieved = 0; recieved < size; recieved += req.bytes.Length)
{
req = new GetFileRequest(ifl, recieved, limit);
await _sender.Send(req);
await _sender.Recieve(req);
result.type = req.type;
result.mtime = req.mtime;
req.bytes.CopyTo(result.bytes, recieved);
}
return(result);
}
