private async Task <IChannel> GetChannelAsync()
{
if (_channel is null)
{
_channel = await _bootstrap.ConnectAsync(_endPoint).ConfigureAwait(false);
if (_connectionUpgradeHandler != null)
{
var request = new DefaultFullHttpRequest(DNHttpVersion.Http11, HttpConnect, $"{Host}:{_uri.Port}");
if (_authenticationString != null)
{
request.Headers.Add(HttpHeaderNames.ProxyAuthorization, _authenticationString);
}
_ = _channel.WriteAndFlushAsync(request);
await _connectionUpgradeHandler.HandshakeTask.ConfigureAwait(false);
_connectionUpgradeHandler = null;
_requestSetupFunc = null;
}
}
return(_channel);
}
private void InitDotNetty()
{
_responseHandler = new HttpResponseHandler();
if (_proxyCredentials != null)
{
NetworkCredential credential = _proxyCredentials.GetCredential(_uri, "Basic");
//TODO 除了Basic的其它实现
string authString = !string.IsNullOrEmpty(credential.Domain) ?
credential.Domain + "\\" + credential.UserName + ":" + credential.Password :
credential.UserName + ":" + credential.Password;
_authenticationString = new StringCharSequence($"Basic {Convert.ToBase64String(Encoding.UTF8.GetBytes(authString))}");
_requestSetupFunc = request =>
request.Headers.Remove(HttpHeaderNames.ProxyAuthorization).Add(HttpHeaderNames.ProxyAuthorization, _authenticationString);
}
_group = new SingleThreadEventLoop();
_bootstrap = new Bootstrap();
_bootstrap
.Group(_group)
.Option(ChannelOption.TcpNodelay, true)
.Option(ChannelOption.SoKeepalive, true)
.Option(ChannelOption.Allocator, new UnpooledByteBufferAllocator())
.Channel <TcpSocketChannel>()
.Handler(new ActionChannelInitializer <IChannel>(channel =>
{
IChannelPipeline pipeline = channel.Pipeline;
var aggregatorHandler = new HttpObjectAggregator(_maxLength);
var codecHandler = new HttpClientCodec(4096, 8192, 8192, false, false, _useProxy);
if (IsHttps)
{
if (_proxyUri is null)
{
pipeline.AddTlsHandler(Host, _certificateValidationCallback);
pipeline.AddLast(DotNettyHandlerNames.Codec, codecHandler);
pipeline.AddLast(DotNettyHandlerNames.Aggregator, aggregatorHandler);
}
else
{
pipeline.AddLast(DotNettyHandlerNames.Codec, codecHandler);
pipeline.AddLast(DotNettyHandlerNames.Aggregator, aggregatorHandler);
_connectionUpgradeHandler = new ConnectionUpgradeHandler(Host, _certificateValidationCallback);
pipeline.AddLast(DotNettyHandlerNames.ConnectionUpgrade, _connectionUpgradeHandler);
}
}
else
{
pipeline.AddLast(DotNettyHandlerNames.Codec, codecHandler);
pipeline.AddLast(DotNettyHandlerNames.Aggregator, aggregatorHandler);
}
pipeline.AddLast(DotNettyHandlerNames.Response, _responseHandler);
_dotNettyPipelineSetupCallback?.Invoke(pipeline);
}));
_dotNettyBootstrapSetupCallback?.Invoke(_bootstrap);
}
