/// <summary>
/// Pipeline step: tunnel the request from the client to the remove
/// server, and schedule the next step to be <c>ReadResponse</c>
/// </summary>
protected virtual void SendRequest()
{
// Transmit the request to the server
RequestLine.SendTo(RemoteSocket);
RequestHeaders.SendTo(RemoteSocket);
if (State.RequestHasMessage)
{
// Tunnel the request message
if (State.RequestMessageChunked)
{
BrowserSocket.TunnelChunkedDataTo(RemoteSocket);
}
else
{
Debug.Assert(State.RequestMessageLength > 0);
BrowserSocket.TunnelDataTo(TunnelRemoteSocket, State.RequestMessageLength);
}
}
State.NextStep = ReadResponse;
}
/// <summary>
/// Pipeline: tunnel the HTTP response from the remote server to the
/// local client, and end the request processing
/// </summary>
protected virtual void SendResponse()
{
if ((ResponseHeaders.TransferEncoding == null && ResponseHeaders.ContentLength == null) == false)
{
// Transmit the response header to the client
SendResponseStatusAndHeaders();
}
// Find out if there is a message body
// (RFC 2616, section 4.4)
int sc = ResponseStatusLine.StatusCode;
if (RequestLine.Method.Equals("HEAD") ||
sc == 204 || sc == 304 || (sc >= 100 && sc <= 199))
{
SendResponseStatusAndHeaders();
CallOnReceiveResponse(ResponseHeaders.ContentEncoding);
return;
}
bool responseMessageChunked = false;
uint responseMessageLength = 0;
if (ResponseHeaders.TransferEncoding != null)
{
responseMessageChunked = Array.IndexOf(ResponseHeaders.TransferEncoding, "chunked") >= 0;
Debug.Assert(responseMessageChunked);
}
else if (ResponseHeaders.ContentLength != null)
{
responseMessageLength = (uint)ResponseHeaders.ContentLength;
if (responseMessageLength == 0)
{
CallOnReceiveResponse(ResponseHeaders.ContentEncoding);
return;
}
}
else
{
// We really should have been given a response
// length. It appears that some popular websites
// send small files without a transfer-encoding
// or length.
// It seems that all of the browsers handle this
// case so we need to as well.
var buffer = new byte[512];
RemoteSocket.TunnelDataTo(ref buffer);
// Transmit the response header to the client
ResponseHeaders.ContentLength = (uint)buffer.Length;
ResponseStatusLine.SendTo(BrowserSocket);
ResponseHeaders.SendTo(BrowserSocket);
BrowserSocket.TunnelDataTo(TunnelBrowserSocket, buffer);
State.NextStep = null;
return;
}
if (State.OnResponseMessagePacket != null)
{
if (State.PersistConnectionRemoteSocket == false)
{
// Pipeline until the connection is closed
RemoteSocket.TunnelDataTo(State.OnResponseMessagePacket);
}
else
{
if (responseMessageChunked)
{
RemoteSocket.TunnelChunkedDataTo(State.OnResponseMessagePacket);
}
else
{
RemoteSocket.TunnelDataTo(State.OnResponseMessagePacket, responseMessageLength);
}
}
State.OnResponseMessagePacket(null, 0, 0);
}
else
{
if (State.PersistConnectionRemoteSocket == false)
{
// Pipeline until the connection is closed
RemoteSocket.TunnelDataTo(TunnelBrowserSocket);
}
else
{
if (responseMessageChunked)
{
RemoteSocket.TunnelChunkedDataTo(BrowserSocket);
}
else
{
RemoteSocket.TunnelDataTo(TunnelBrowserSocket, responseMessageLength);
}
}
}
CallOnReceiveResponse(ResponseHeaders.ContentEncoding);
}