public override DataFrame Read()
{
DataFrame frame = null;
try
{
if (_chunks == null || !_chunks.MoveNext())
{
if (_isTransparent)
{
_chunks = BaseHttpDataAdapter.ReadFrames(null, _reader).GetEnumerator();
}
else
{
_currentHeader = HttpParser.ReadResponseHeader(_reader, _layer._config.ResponseStrictParsing, _logger);
HttpRequestHeader request = null;
lock (_requests)
{
if (_requests.Count > 0)
{
// If we have a queued request then dequeue and set head response
request = _requests.Dequeue();
}
}
lock (_requestStream)
{
if (request == null)
{
try
{
_requestStream.Position = 0;
request = HttpParser.ReadRequestHeader(new DataReader(_requestStream), false, _logger);
}
catch (EndOfStreamException)
{
// Ignore end of stream, might just mean we sent garbage to the server which we can't parse
}
}
_requestStream.SetLength(0);
}
if (request != null)
{
_currentHeader.SetHeadRequest(request.IsHead);
_currentHeader.SetConnectRequest(request.IsConnect);
if (_currentHeader.Is100Continue)
{
// If a 100 status response then requeue the request
lock (_requests)
{
HttpRequestHeader[] headers = _requests.ToArray();
_requests.Clear();
// Unlikely that another request will come as client is probably waiting for 100 status, but might as well be sure
_requests.Enqueue(request);
foreach (HttpRequestHeader head in headers)
{
_requests.Enqueue(head);
}
}
}
}
if (_currentHeader.IsUpgradeResponse)
{
_layer._upgrading = true;
_isTransparent = true;
}
_chunks = _currentHeader.ReadFrames(CreateConfig(_currentHeader, request)).GetEnumerator();
}
if (!_chunks.MoveNext())
{
throw new EndOfStreamException();
}
}
frame = _chunks.Current;
}
catch (EndOfStreamException)
{
frame = null;
}
return(frame);
}
