private async Task AcceptConnections(CancellationToken token)
{
try
{
#region Start-Listeners
foreach (Uri uri in _Settings.Uris)
{
_HttpListener.Prefixes.Add(uri.ToString());
}
_HttpListener.Start();
#endregion
#region Process-Requests
while (_HttpListener.IsListening)
{
if (_RequestCount >= _Settings.IO.MaxRequests)
{
await Task.Delay(100, token).ConfigureAwait(false);
continue;
}
HttpListenerContext listenerCtx = await _HttpListener.GetContextAsync().ConfigureAwait(false);
Interlocked.Increment(ref _RequestCount);
HttpContext ctx = null;
Task unawaited = Task.Run(async() =>
{
DateTime startTime = DateTime.Now;
try
{
#region Build-Context
Events.HandleConnectionReceived(this, new ConnectionEventArgs(
listenerCtx.Request.RemoteEndPoint.Address.ToString(),
listenerCtx.Request.RemoteEndPoint.Port));
ctx = new HttpContext(listenerCtx, _Settings, Events);
Events.HandleRequestReceived(this, new RequestEventArgs(ctx));
if (_Settings.Debug.Requests)
{
Events.Logger?.Invoke(
_Header + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " " +
ctx.Request.Method.ToString() + " " + ctx.Request.Url.RawWithoutQuery);
}
Statistics.IncrementRequestCounter(ctx.Request.Method);
Statistics.IncrementReceivedPayloadBytes(ctx.Request.ContentLength);
#endregion
#region Check-Access-Control
if (!_Settings.AccessControl.Permit(ctx.Request.Source.IpAddress))
{
Events.HandleRequestDenied(this, new RequestEventArgs(ctx));
if (_Settings.Debug.AccessControl)
{
Events.Logger?.Invoke(_Header + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " denied due to access control");
}
listenerCtx.Response.Close();
return;
}
#endregion
#region Process-Preflight-Requests
if (ctx.Request.Method == HttpMethod.OPTIONS)
{
if (_Routes.Preflight != null)
{
if (_Settings.Debug.Routing)
{
Events.Logger?.Invoke(
_Header + "preflight route for " + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " " +
ctx.Request.Method.ToString() + " " + ctx.Request.Url.RawWithoutQuery);
}
await _Routes.Preflight(ctx).ConfigureAwait(false);
return;
}
}
#endregion
#region Pre-Routing-Handler
bool terminate = false;
if (_Routes.PreRouting != null)
{
terminate = await _Routes.PreRouting(ctx).ConfigureAwait(false);
if (terminate)
{
if (_Settings.Debug.Routing)
{
Events.Logger?.Invoke(
_Header + "prerouting terminated connection for " + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " " +
ctx.Request.Method.ToString() + " " + ctx.Request.Url.RawWithoutQuery);
}
return;
}
}
#endregion
#region Content-Routes
if (ctx.Request.Method == HttpMethod.GET || ctx.Request.Method == HttpMethod.HEAD)
{
if (_Routes.Content.Exists(ctx.Request.Url.RawWithoutQuery))
{
if (_Settings.Debug.Routing)
{
Events.Logger?.Invoke(
_Header + "content route for " + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " " +
ctx.Request.Method.ToString() + " " + ctx.Request.Url.RawWithoutQuery);
}
await _Routes.ContentHandler.Process(ctx, token).ConfigureAwait(false);
return;
}
}
#endregion
#region Static-Routes
Func <HttpContext, Task> handler = _Routes.Static.Match(ctx.Request.Method, ctx.Request.Url.RawWithoutQuery);
if (handler != null)
{
if (_Settings.Debug.Routing)
{
Events.Logger?.Invoke(
_Header + "static route for " + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " " +
ctx.Request.Method.ToString() + " " + ctx.Request.Url.RawWithoutQuery);
}
await handler(ctx).ConfigureAwait(false);
return;
}
#endregion
#region Dynamic-Routes
handler = _Routes.Dynamic.Match(ctx.Request.Method, ctx.Request.Url.RawWithoutQuery);
if (handler != null)
{
if (_Settings.Debug.Routing)
{
Events.Logger?.Invoke(
_Header + "dynamic route for " + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " " +
ctx.Request.Method.ToString() + " " + ctx.Request.Url.RawWithoutQuery);
}
await handler(ctx).ConfigureAwait(false);
return;
}
#endregion
#region Default-Route
if (_Routes.Default != null)
{
if (_Settings.Debug.Routing)
{
Events.Logger?.Invoke(
_Header + "default route for " + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " " +
ctx.Request.Method.ToString() + " " + ctx.Request.Url.RawWithoutQuery);
}
await _Routes.Default(ctx).ConfigureAwait(false);
return;
}
else
{
if (_Settings.Debug.Routing)
{
Events.Logger?.Invoke(
_Header + "default route not found for " + ctx.Request.Source.IpAddress + ":" + ctx.Request.Source.Port + " " +
ctx.Request.Method.ToString() + " " + ctx.Request.Url.RawWithoutQuery);
}
ctx.Response.StatusCode = 404;
ctx.Response.ContentType = Pages.Default404Page.ContentType;
await ctx.Response.Send(Pages.Default404Page.Content).ConfigureAwait(false);
return;
}
#endregion
}
catch (Exception eInner)
{
ctx.Response.StatusCode = 500;
ctx.Response.ContentType = Pages.Default500Page.ContentType;
await ctx.Response.Send(Pages.Default500Page.Content).ConfigureAwait(false);
Events.HandleExceptionEncountered(this, new ExceptionEventArgs(ctx, eInner));
}
finally
{
Interlocked.Decrement(ref _RequestCount);
if (ctx != null && ctx.Response != null && ctx.Response.ResponseSent)
{
Events.HandleResponseSent(this, new ResponseEventArgs(ctx, TotalMsFrom(startTime)));
Statistics.IncrementSentPayloadBytes(ctx.Response.ContentLength);
}
}
}, token);
}
#endregion
}
catch (TaskCanceledException)
{
}
catch (OperationCanceledException)
{
}
catch (Exception e)
{
Events.HandleExceptionEncountered(this, new ExceptionEventArgs(null, e));
}
finally
{
Events.HandleServerStopped(this, EventArgs.Empty);
}
}