private IRequestContext CreateRequestContext()
{
_logger.Debug("Creating request context...");
var requestContext = _requestContextFactory.Create();
requestContext.Policies = _policyRegistry;
requestContext.Bag = new Dictionary <string, object>();
return(requestContext);
}
/// <inheritdoc/>
public async Task Run(RequestDelegate pipeline, CancellationToken token)
{
if (_config.Value == null)
{
throw new InvalidOperationException("Configuration not provided");
}
_logger.LogInformation($"Starting udp server on {_config.Value.EndPoint}");
using (var client = new UdpClient(_config.Value.EndPoint))
{
if (_config.Value.AllowNatTraversal != null)
{
client.AllowNatTraversal(_config.Value.AllowNatTraversal.Value);
}
client.DontFragment = _config.Value.DontFragment;
client.EnableBroadcast = _config.Value.EnableBroadcast;
if (_config.Value.ExclusiveAddressUse != null)
{
client.ExclusiveAddressUse = _config.Value.ExclusiveAddressUse.GetValueOrDefault();
}
client.MulticastLoopback = _config.Value.MulticastLoopback;
client.Ttl = _config.Value.Ttl;
if (_config.Value.MulticastGroups != null)
{
foreach (var addr in _config.Value.MulticastGroups)
{
client.JoinMulticastGroup(addr);
}
}
while (token.IsCancellationRequested == false)
{
var receiveTask = client.ReceiveAsync();
receiveTask.Wait(token);
var received = await receiveTask;
_logger.LogDebug($"Received {received.Buffer.Length} bytes from {received.RemoteEndPoint}");
if (received.Buffer != null)
{
var id = Convert.ToBase64String(BitConverter.GetBytes(Interlocked.Increment(ref contextId)));
_logger.LogDebug($"{id} Context started");
var context = _factory.Create(received.RemoteEndPoint, received.Buffer, id);
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
Task.Run(async() =>
{
try
{
await pipeline(context);
if (context.ResponsePacket != null)
{
_logger.LogDebug($"{id} Response generated by pipeline");
var bytes = await client.SendAsync(context.ResponsePacket, context.ResponsePacket.Length, context.RemoteEndpoint);
_logger.LogDebug($"{id} {bytes} bytes send to {context.RemoteEndpoint}");
}
}
catch (Exception e)
{
_logger.LogError(exception: e, message: $"{id} Unhandled exception during pipeline execution");
}
}).ConfigureAwait(false);
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
}
}
}
}
