async Task Initialize(BufferOffsetSize buffer, CancellationToken cancellationToken)
{
WebConnection.Debug($"{ME} INIT: status={(int)StatusCode} bos={buffer.Offset}/{buffer.Size}");
string contentType = Headers["Transfer-Encoding"];
bool chunkedRead = (contentType != null && contentType.IndexOf("chunked", StringComparison.OrdinalIgnoreCase) != -1);
string clength = Headers["Content-Length"];
if (!chunkedRead && !string.IsNullOrEmpty(clength))
{
if (!long.TryParse(clength, out contentLength))
{
contentLength = Int64.MaxValue;
}
}
else
{
contentLength = Int64.MaxValue;
}
if (Version == HttpVersion.Version11 && RequestStream.KeepAlive)
{
KeepAlive = true;
var cncHeader = Headers[ServicePoint.UsesProxy ? "Proxy-Connection" : "Connection"];
if (cncHeader != null)
{
cncHeader = cncHeader.ToLower();
KeepAlive = cncHeader.IndexOf("keep-alive", StringComparison.Ordinal) != -1;
if (cncHeader.IndexOf("close", StringComparison.Ordinal) != -1)
{
KeepAlive = false;
}
}
}
// Negative numbers?
if (!Int32.TryParse(clength, out stream_length))
{
stream_length = -1;
}
string me = "WebResponseStream.Initialize()";
string tencoding = null;
if (ExpectContent)
{
tencoding = Headers["Transfer-Encoding"];
}
ChunkedRead = (tencoding != null && tencoding.IndexOf("chunked", StringComparison.OrdinalIgnoreCase) != -1);
if (!ChunkedRead)
{
readBuffer = buffer;
try {
if (contentLength > 0 && readBuffer.Size >= contentLength)
{
if (!IsNtlmAuth())
{
await ReadAllAsync(false, cancellationToken).ConfigureAwait(false);
}
}
} catch (Exception e) {
throw GetReadException(WebExceptionStatus.ReceiveFailure, e, me);
}
}
else if (ChunkStream == null)
{
try {
ChunkStream = new MonoChunkStream(buffer.Buffer, buffer.Offset, buffer.Offset + buffer.Size, Headers);
} catch (Exception e) {
throw GetReadException(WebExceptionStatus.ServerProtocolViolation, e, me);
}
}
else
{
ChunkStream.ResetBuffer();
try {
ChunkStream.Write(buffer.Buffer, buffer.Offset, buffer.Size);
} catch (Exception e) {
throw GetReadException(WebExceptionStatus.ServerProtocolViolation, e, me);
}
}
WebConnection.Debug($"{ME} INIT #1: - {ExpectContent} {closed} {nextReadCalled}");
if (!ExpectContent)
{
if (!closed && !nextReadCalled)
{
if (contentLength == Int64.MaxValue)
{
contentLength = 0;
}
nextReadCalled = true;
}
Operation.Finish(true);
}
}
void ReadDone(IAsyncResult result)
{
WebConnectionData data = Data;
Stream ns = nstream;
if (ns == null)
{
Close(true);
return;
}
int nread = -1;
try {
nread = ns.EndRead(result);
} catch (ObjectDisposedException) {
return;
} catch (Exception e) {
if (e.InnerException is ObjectDisposedException)
{
return;
}
HandleError(WebExceptionStatus.ReceiveFailure, e, "ReadDone1");
return;
}
if (nread == 0)
{
HandleError(WebExceptionStatus.ReceiveFailure, null, "ReadDone2");
return;
}
if (nread < 0)
{
HandleError(WebExceptionStatus.ServerProtocolViolation, null, "ReadDone3");
return;
}
int pos = -1;
nread += position;
if (data.ReadState == ReadState.None)
{
Exception exc = null;
try {
pos = GetResponse(data, sPoint, buffer, nread);
} catch (Exception e) {
exc = e;
}
if (exc != null || pos == -1)
{
HandleError(WebExceptionStatus.ServerProtocolViolation, exc, "ReadDone4");
return;
}
}
if (data.ReadState == ReadState.Aborted)
{
HandleError(WebExceptionStatus.RequestCanceled, null, "ReadDone");
return;
}
if (data.ReadState != ReadState.Content)
{
int est = nread * 2;
int max = (est < buffer.Length) ? buffer.Length : est;
byte [] newBuffer = new byte [max];
Buffer.BlockCopy(buffer, 0, newBuffer, 0, nread);
buffer = newBuffer;
position = nread;
data.ReadState = ReadState.None;
InitRead();
return;
}
position = 0;
WebConnectionStream stream = new WebConnectionStream(this, data);
bool expect_content = ExpectContent(data.StatusCode, data.request.Method);
string tencoding = null;
if (expect_content)
{
tencoding = data.Headers ["Transfer-Encoding"];
}
chunkedRead = (tencoding != null && tencoding.IndexOf("chunked", StringComparison.OrdinalIgnoreCase) != -1);
if (!chunkedRead)
{
stream.ReadBuffer = buffer;
stream.ReadBufferOffset = pos;
stream.ReadBufferSize = nread;
try {
stream.CheckResponseInBuffer();
} catch (Exception e) {
HandleError(WebExceptionStatus.ReceiveFailure, e, "ReadDone7");
}
}
else if (chunkStream == null)
{
try {
chunkStream = new ChunkStream(buffer, pos, nread, data.Headers);
} catch (Exception e) {
HandleError(WebExceptionStatus.ServerProtocolViolation, e, "ReadDone5");
return;
}
}
else
{
chunkStream.ResetBuffer();
try {
chunkStream.Write(buffer, pos, nread);
} catch (Exception e) {
HandleError(WebExceptionStatus.ServerProtocolViolation, e, "ReadDone6");
return;
}
}
data.stream = stream;
if (!expect_content)
{
stream.ForceCompletion();
}
data.request.SetResponseData(data);
}
