public async Task OnResultExecutionAsync(ResultExecutingContext context, ResultExecutionDelegate next)
{
if (context.Result is ViewResult viewResult /* && viewResult.ViewData.Model == null */)
{
// view
var compositionResult = await CompositionHandler.HandleGetRequest(context.HttpContext, viewResult.Model);
if (compositionResult.StatusCode == StatusCodes.Status200OK)
{
viewResult.ViewData.Model = compositionResult.ViewModel;
}
}
else if (context.Result is ObjectResult objectResult /* && objectResult.Value == null */)
{
// no view
var compositionResult = await CompositionHandler.HandleGetRequest(context.HttpContext, objectResult.Value);
if (compositionResult.StatusCode == StatusCodes.Status200OK)
{
objectResult.Value = compositionResult.ViewModel;
}
}
await next();
}
public async Task OnResultExecutionAsync(ResultExecutingContext context, ResultExecutionDelegate next)
{
(var viewModel, var statusCode) = await CompositionHandler.HandleRequest(context.HttpContext);
var routeData = context.HttpContext.GetRouteData();
var request = context.HttpContext.Request;
//matching handlers could be cached by URL
//per route only 1 result handler is allowed, the owning one
var handler = resultHandlers
.Where(a => a.Matches(routeData, request.Method, request))
.SingleOrDefault();
if (handler != null)
{
await handler.Handle(context, viewModel, statusCode);
}
else
{
defaultHandler();
}
await next();
void defaultHandler()
{
if (context.Result is ViewResult viewResult && viewResult.ViewData.Model == null)
{
//MVC
if (statusCode == StatusCodes.Status200OK)
{
viewResult.ViewData.Model = viewModel;
}
}
public static async Task HandleRequest(HttpContext context)
{
var requestId = context.Request.Headers.GetComposedRequestIdHeaderOr(() =>
{
var id = Guid.NewGuid().ToString();
context.Request.Headers.AddComposedRequestIdHeader(id);
return(id);
});
var(viewModel, statusCode) = await CompositionHandler.HandleRequest(requestId, context);
context.Response.Headers.AddComposedRequestIdHeader(requestId);
//to avoid a breaking change we cannot change the tuple returned by CompositionHandler.HandleRequest
//so the only option here is to check if the viewModel is null. View model is null only when there are
//no handlers registered for the route, so it's for sure an HTTP404
if (viewModel != null)
{
string json = JsonConvert.SerializeObject(viewModel, GetSettings(context));
context.Response.ContentType = "application/json; charset=utf-8";
await context.Response.WriteAsync(json);
}
else
{
await context.Response.WriteAsync(string.Empty);
}
}
protected override void Act()
{
//setup
var section = MainSource.GetSection(SectionInChildSource1);
CompositionHandler.Dispose();
}
public async Task OnResultExecutionAsync(ResultExecutingContext context, ResultExecutionDelegate next)
{
if (context.Result is ViewResult viewResult && viewResult.ViewData.Model == null)
{
// view
var compositionResult = await CompositionHandler.HandleGetRequest(context.HttpContext);
if (compositionResult.StatusCode == StatusCodes.Status200OK)
{
viewResult.ViewData.Model = compositionResult.ViewModel;
}
}
public async Task OnResultExecutionAsync(ResultExecutingContext context, ResultExecutionDelegate next)
{
(var viewModel, var statusCode) = await CompositionHandler.HandleRequest(context.HttpContext);
DefaultHandler();
await next();
void DefaultHandler()
{
if (context.Result is ViewResult viewResult && viewResult.ViewData.Model == null)
{
//MVC
if (statusCode == StatusCodes.Status200OK)
{
viewResult.ViewData.Model = viewModel;
}
}
static async Task HandleRequest(HttpContext context)
{
var requestId = context.Request.Headers.GetComposedRequestIdHeaderOr(() => Guid.NewGuid().ToString());
var(viewModel, statusCode) = await CompositionHandler.HandleRequest(requestId, context);
context.Response.Headers.AddComposedRequestIdHeader(requestId);
if (statusCode == StatusCodes.Status200OK)
{
string json = JsonConvert.SerializeObject(viewModel, GetSettings(context));
context.Response.ContentType = "application/json; charset=utf-8";
await context.Response.WriteAsync(json);
}
else
{
context.Response.StatusCode = statusCode;
}
}
