RequestDelegate IHttpPipelineAccessPoint <RequestDelegate> .Combine(IHttpPipelineHandler pipeline)
{
if (pipeline == null)
{
throw new ArgumentNullException(nameof(pipeline));
}
return(async context =>
{
var request = await CreateRequest(context);
HttpResponseMessage response;
try
{
response = await pipeline.ProcessRequest(request, context.RequestAborted);
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception e)
{
await _exceptionHandler.HandleExceptionAsync(context, e);
return;
}
await ApplyResponse(context, response);
});
}
public async ValueTask <HttpResponseMessage> ProcessRequest(HttpRequestMessage request, CancellationToken cancellationToken)
{
var activity = (Activity)null;
if (_listener.IsEnabled())
{
activity = new Activity(request.RequestUri.AbsoluteUri);
}
if (activity != null)
{
_listener.StartActivity(activity, request);
}
var response = await _handler.ProcessRequest(request, cancellationToken);
if (activity != null)
{
_listener.StopActivity(activity, response);
}
return(response);
}
RequestDelegate IHttpPipelineAccessPoint <RequestDelegate> .Combine(IHttpPipelineHandler pipeline)
{
if (pipeline == null)
{
throw new ArgumentNullException(nameof(pipeline));
}
return(async context =>
{
var request = await CreateRequest(context);
var response = await pipeline.ProcessRequest(request);
await ApplyResponse(context, response);
});
}
/// <summary>
/// 派生类重写此方法处理请求
/// </summary>
/// <param name="request">请求信息</param>
/// <param name="downstream">downstream pipeline request handler</param>
/// <returns>响应信息</returns>
protected virtual ValueTask <HttpResponseMessage> ProcessRequest(HttpRequestMessage request, IHttpPipelineHandler downstream)
{
return(downstream.ProcessRequest(request));
}
protected override ValueTask <HttpResponseMessage> ProcessRequest(HttpRequestMessage request, IHttpPipelineHandler downstream, CancellationToken cancellationToken)
{
request = _func(request);
return(downstream.ProcessRequest(request, cancellationToken));
}
public ValueTask <HttpResponseMessage> ProcessRequest(HttpRequestMessage request)
{
request = _rewriter.Rewrite(request);
return(_handler.ProcessRequest(request));
}
public ValueTask <HttpResponseMessage> ProcessRequest(HttpRequestMessage request, CancellationToken cancellationToken)
{
request = _rewriter.Rewrite(request);
return(_handler.ProcessRequest(request, cancellationToken));
}
