protected override void Dispose(bool disposing)
{
_disposed = true;
if (disposing)
{
_inner.Dispose();
}
}
private async Task TunnelThroughProxyAsync(HttpRequestMessage request, ApmStream transport, CancellationToken cancellationToken)
{
// Send a Connect request:
// CONNECT server.example.com:80 HTTP / 1.1
// Host: server.example.com:80
var connectReqeuest = new HttpRequestMessage();
connectReqeuest.Headers.ProxyAuthorization = request.Headers.ProxyAuthorization;
connectReqeuest.Method = new HttpMethod("CONNECT");
// TODO: IPv6 hosts
string authority = request.GetHostProperty() + ":" + request.GetPortProperty().Value;
connectReqeuest.SetAddressLineProperty(authority);
connectReqeuest.Headers.Host = authority;
HttpConnection connection = new HttpConnection(new BufferedReadStream(transport));
HttpResponseMessage connectResponse;
try
{
connectResponse = await connection.SendAsync(connectReqeuest, cancellationToken);
// TODO:? await connectResponse.Content.LoadIntoBufferAsync(); // Drain any body
// There's no danger of accidently consuming real response data because the real request hasn't been sent yet.
}
catch (Exception ex)
{
transport.Dispose();
throw new HttpRequestException("SSL Tunnel failed to initialize", ex);
}
// Listen for a response. Any 2XX is considered success, anything else is considered a failure.
if ((int)connectResponse.StatusCode < 200 || 300 <= (int)connectResponse.StatusCode)
{
transport.Dispose();
throw new HttpRequestException("Failed to negotiate the proxy tunnel: " + connectResponse.ToString());
}
}