private async Task <object> GetFileStream()
{
var totalLength = Length;
long glostart = _start ?? 0;
long gloend = _end == null || (_start == _end && _end == 0) ? totalLength : _end.Value + 1;
long fileStart = 0;
long fileEnd = 0;
_task = Task.FromResult((WebResponse)null);
foreach (var file in _files)
{
var clofile = file;
fileEnd += clofile.Size;
if (glostart >= fileEnd || gloend <= fileStart)
{
fileStart += clofile.Size;
continue;
}
long clostart = Math.Max(0, glostart - fileStart);
long cloend = gloend - fileStart - 1;
_task = _task.ContinueWith(task1 =>
{
WebResponse response;
int retryCnt = 0;
while (true)
{
try
{
var request = CreateRequest(clostart, cloend, clofile, retryCnt > 0);
Logger.Debug($"HTTP:{request.Method}:{request.RequestUri.AbsoluteUri}");
response = request.GetResponse();
break;
}
catch (Exception wex)
{
if (++retryCnt <= 3)
{
Logger.Warn($"HTTP: Failed with {wex.Message} ");
continue;
}
Logger.Error($"GetFileStream failed with {wex}");
_innerStream.Dispose();
throw;
}
}
using (Stream responseStream = response.GetResponseStream())
{
responseStream?.CopyTo(_innerStream);
}
return(response);
}, TaskContinuationOptions.OnlyOnRanToCompletion);
fileStart += file.Size;
}
_task = _task.ContinueWith(task1 =>
{
_innerStream.Flush();
return((WebResponse)null);
}, TaskContinuationOptions.OnlyOnRanToCompletion);
return(_innerStream);
}
private async Task <object> GetFileStream()
{
var totalLength = Length;
long glostart = _start ?? 0;
long gloend = _end == null || (_start == _end && _end == 0) ? totalLength : _end.Value + 1;
long fileStart = 0;
long fileEnd = 0;
_task = Task.FromResult((WebResponse)null);
foreach (var file in _files)
{
var clofile = file;
fileEnd += clofile.Size;
if (glostart >= fileEnd || gloend <= fileStart)
{
fileStart += clofile.Size;
continue;
}
var instart = Math.Max(0, glostart - fileStart);
var inend = gloend - fileStart - 1;
_task = _task.ContinueWith(task1 =>
{
WebResponse response;
int cnt = 0;
while (true)
{
try
{
//TODO: refact
string downloadkey = string.Empty;
if (_shard.Type == ShardType.WeblinkGet)
{
downloadkey = _cloud.Account.DownloadToken.Value;
}
var request = _shard.Type == ShardType.Get
? (HttpWebRequest)WebRequest.Create($"{_shard.Url}{Uri.EscapeDataString(file.FullPath)}")
: (HttpWebRequest)WebRequest.Create($"{_shard.Url}{new Uri(file.PublicLink).PathAndQuery.Remove(0, "/public".Length)}?key={downloadkey}");
Logger.Debug($"HTTP:{request.Method}:{request.RequestUri.AbsoluteUri}");
request.Headers.Add("Accept-Ranges", "bytes");
request.AddRange(instart, inend);
request.Proxy = _cloud.Account.Proxy;
request.CookieContainer = _cloud.Account.Cookies;
request.Method = "GET";
request.ContentType = MediaTypeNames.Application.Octet;
request.Accept = "*/*";
request.UserAgent = ConstSettings.UserAgent;
request.AllowReadStreamBuffering = false;
response = request.GetResponse();
break;
}
catch (WebException wex)
{
if (wex.Status == WebExceptionStatus.ProtocolError)
{
if (wex.Response is HttpWebResponse wexresp && wexresp.StatusCode == HttpStatusCode.GatewayTimeout && ++cnt <= 3)
{
continue;
}
}
_innerStream.Close();
throw;
}
}
using (Stream responseStream = response.GetResponseStream()) //ReadResponseAsByte(response, CancellationToken.None, _innerStream);
{
responseStream?.CopyTo(_innerStream);
}
return(response);
}, TaskContinuationOptions.OnlyOnRanToCompletion);
fileStart += file.Size;
}
_task = _task.ContinueWith(task1 =>
{
_innerStream.Flush();
return((WebResponse)null);
}, TaskContinuationOptions.OnlyOnRanToCompletion);
return(_innerStream);
}
