public async Task Invoke(HttpContext httpContext)
{
Debug.Assert(httpContext != null);
// local cache for virtual disptach result
var features = httpContext.Features;
var existingFeature = features.Get <IServiceProvidersFeature>();
// All done if RequestServices is set
if (existingFeature?.RequestServices != null)
{
await _next.Invoke(httpContext);
return;
}
var replacementFeature = new RequestServicesFeature(_scopeFactory);
try
{
features.Set <IServiceProvidersFeature>(replacementFeature);
await _next.Invoke(httpContext);
}
finally
{
replacementFeature.Dispose();
// Restore previous feature state
features.Set(existingFeature);
}
}
