public async Task BindModelAsync(ModelBindingContext bindingContext)
{
var httpContext = bindingContext.HttpContext;
var modelBindingKey = bindingContext.IsTopLevelObject
? bindingContext.BinderModelName ?? string.Empty
: bindingContext.ModelName;
var formatterContext = new InputFormatterContext(
httpContext, modelBindingKey,
bindingContext.ModelState,
bindingContext.ModelMetadata,
_readerFactory, true);
try
{
var result = await _input.ReadAsync(formatterContext);
if (result.HasError)
{
return;
}
if (result.IsModelSet)
{
var model = result.Model;
bindingContext.Result = ModelBindingResult.Success(model);
}
else
{
var message = bindingContext
.ModelMetadata
.ModelBindingMessageProvider
.MissingRequestBodyRequiredValueAccessor();
bindingContext.ModelState.AddModelError(modelBindingKey, message);
}
}
catch (Exception exception)
when(exception is InputFormatterException || ShouldHandleException(_input))
{
bindingContext.ModelState.AddModelError(modelBindingKey,
exception, bindingContext.ModelMetadata);
}
}