internal static void InitRead(WebConnection cnc)
{
StartRead(cnc)
.ContinueWith(t =>
{
if (t.IsFaulted)
cnc.HandleError(WebExceptionStatus.UnknownError, t.Exception, "InitRead");
if (ReadState.Aborted == cnc.Data.ReadState)
cnc.HandleError(WebExceptionStatus.ConnectFailure, null, "InitRead");
});
}
internal static async Task StartRead(WebConnection cnc)
{
try
{
await ReadDoneAsync(cnc);
}
catch (Exception e)
{
cnc.HandleError(WebExceptionStatus.ReceiveFailure, e, "StartRead");
}
}
static async Task ReadDoneAsync(WebConnection cnc)
{
var nread = 0;
var data = cnc.Data;
var ns = cnc._nstream;
if (ns == null)
{
cnc.Close(true);
return;
}
var pos = -1;
nread += cnc._position;
if (data.ReadState == ReadState.None)
{
Exception exc = null;
try
{
var result = await GetResponseAsync(cnc._nstream, data, cnc._sPoint).ConfigureAwait(false);
}
catch (Exception e)
{
exc = e;
}
if (exc != null)
{
cnc.HandleError(WebExceptionStatus.ServerProtocolViolation, exc, "ReadDone4");
return;
}
}
if (data.ReadState == ReadState.Aborted)
{
cnc.HandleError(WebExceptionStatus.RequestCanceled, null, "ReadDone");
return;
}
if (data.ReadState != ReadState.Content)
{
var est = nread * 2;
var max = (est < cnc._buffer.Length) ? cnc._buffer.Length : est;
var newBuffer = new byte[max];
Buffer.BlockCopy(cnc._buffer, 0, newBuffer, 0, nread);
cnc._buffer = newBuffer;
cnc._position = nread;
data.ReadState = ReadState.None;
InitRead(cnc);
return;
}
cnc._position = 0;
var stream = new WebConnectionStream(cnc, data);
var expectContent = ExpectContent(data.StatusCode, data.Request.Method);
string tencoding = null;
if (expectContent)
tencoding = data.Headers["Transfer-Encoding"];
cnc._chunkedRead = (tencoding != null && tencoding.IndexOf("chunked", StringComparison.OrdinalIgnoreCase) != -1);
if (!cnc._chunkedRead)
{
stream.ReadBuffer = cnc._buffer;
stream.ReadBufferOffset = 0;
stream.ReadBufferSize = nread;
try
{
await stream.CheckResponseInBufferAsync().ConfigureAwait(false);
}
catch (Exception e)
{
cnc.HandleError(WebExceptionStatus.ReceiveFailure, e, "ReadDone7");
}
}
else if (cnc._chunkStream == null)
{
try
{
cnc._chunkStream = new ChunkStream(cnc._buffer, 0, nread, data.Headers);
}
catch (Exception e)
{
cnc.HandleError(WebExceptionStatus.ServerProtocolViolation, e, "ReadDone5");
return;
}
}
else
{
cnc._chunkStream.ResetBuffer();
try
{
cnc._chunkStream.Write(cnc._buffer, 0, nread);
}
catch (Exception e)
{
cnc.HandleError(WebExceptionStatus.ServerProtocolViolation, e, "ReadDone6");
return;
}
}
data.Stream = stream;
if (!expectContent)
stream.ForceCompletion();
await data.Request.SetResponseDataAsync(data).ConfigureAwait(false);
}