static async Task Awaited(EndpointExceptionMappingMiddleware middleware, Task task, HttpContext httpContext)
{
ExceptionDispatchInfo?edi2 = null;
try
{
await task;
}
catch (Exception ex)
{
edi2 = ExceptionDispatchInfo.Capture(ex);
}
if (edi2 != null)
{
PrepareExceptionMappingContext(middleware, httpContext);
edi2.Throw();
}
}
/// <summary>
/// Injects exception mapper into exception handler middleware and wraps the current request
/// pipeline into the new pipeline.
/// </summary>
static RequestDelegate BuildExceptionMappingPipeline(
EndpointExceptionMappingMiddleware middleware,
IApplicationBuilder app,
RequestDelegate next)
{
var exceptionHandlerOptions = new ExceptionHandlerOptions
{
ExceptionHandler = middleware.OnExceptionHandler
};
return
// Wrap everything with exception handler middleware with exception mapping injected
(app.UseExceptionHandler(exceptionHandlerOptions)
// Use a middleware to capture exception mapping context when exception occurred
// This is needed because exception handler middleware clears required endpoint
// information before calling the handler delegate
.Use(middleware.CaptureExceptionMappingContext)
// Call original request pipeline in wrapped pipeline
.Use(_ => next)
.Build());
}