public void Select_ReturnsOnlyHandler()
{
// Arrange
var descriptor = new HandlerMethodDescriptor
{
HttpMethod = "GET"
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor,
},
},
RouteData = new RouteData(),
HttpContext = new DefaultHttpContext
{
Request =
{
Method = "GET"
},
},
};
var selector = CreateSelector();
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Same(descriptor, actual);
}
private static object[] PrepareArguments(
IDictionary<string, object> argumentsInDictionary,
HandlerMethodDescriptor handler)
{
if (handler.Parameters.Count == 0)
{
return null;
}
var arguments = new object[handler.Parameters.Count];
for (var i = 0; i < arguments.Length; i++)
{
var parameter = handler.Parameters[i];
if (argumentsInDictionary.TryGetValue(parameter.ParameterInfo.Name, out var value))
{
// Do nothing, already set the value.
}
else if (!ParameterDefaultValue.TryGetDefaultValue(parameter.ParameterInfo, out value) &&
parameter.ParameterInfo.ParameterType.IsValueType)
{
value = Activator.CreateInstance(parameter.ParameterInfo.ParameterType);
}
arguments[i] = value;
}
return arguments;
}
private static HandlerMethod CreateHandlerMethod(HandlerMethodDescriptor handlerDescriptor)
{
var method = handlerDescriptor.MethodInfo;
var parameters = handlerDescriptor.Parameters.ToArray();
var returnType = method.ReturnType;
if (returnType == typeof(void))
{
return(new VoidHandlerMethod(parameters, method));
}
else if (typeof(IActionResult).IsAssignableFrom(returnType))
{
return(new ActionResultHandlerMethod(parameters, method));
}
else if (returnType == typeof(Task))
{
return(new NonGenericTaskHandlerMethod(parameters, method));
}
else
{
var taskType = ClosedGenericMatcher.ExtractGenericInterface(returnType, typeof(Task <>));
if (taskType != null && typeof(IActionResult).IsAssignableFrom(taskType.GenericTypeArguments[0]))
{
return(new GenericTaskHandlerMethod(parameters, method));
}
}
throw new InvalidOperationException(Resources.FormatUnsupportedHandlerMethodType(returnType));
}
public static HandlerMethodAndMetadata Create(HandlerMethodDescriptor handler)
{
var name = handler.Method.Name;
string httpMethod;
if (name.StartsWith("OnGet", StringComparison.Ordinal))
{
httpMethod = "GET";
}
else if (name.StartsWith("OnPost", StringComparison.Ordinal))
{
httpMethod = "POST";
}
else
{
httpMethod = null;
}
var formactionStart = httpMethod?.Length + 2 ?? 0;
var formactionLength = name.EndsWith("Async", StringComparison.Ordinal)
? name.Length - formactionStart - "Async".Length
: name.Length - formactionStart;
var formaction = formactionLength == 0 ? null : name.Substring(formactionStart, formactionLength);
return(new HandlerMethodAndMetadata(handler, httpMethod, formaction));
}
private static PageHandlerExecutingContext GetContext(HandlerMethodDescriptor handlerMethodDescriptor)
{
var actionContext = new ActionContext(new DefaultHttpContext(), new RouteData(), new PageActionDescriptor());
var pageContext = new PageContext(actionContext);
return(new PageHandlerExecutingContext(pageContext, Array.Empty <IFilterMetadata>(), handlerMethodDescriptor, new Dictionary <string, object>(), new object()));
}
public void Select_WithHandler_ThrowsIfMoreThanOneHandlerMatches()
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
MethodInfo = GetType().GetMethod(nameof(Post)),
HttpMethod = "POST",
Name = "Add",
};
var descriptor2 = new HandlerMethodDescriptor
{
MethodInfo = GetType().GetMethod(nameof(PostAsync)),
HttpMethod = "POST",
Name = "Add",
};
var descriptor3 = new HandlerMethodDescriptor
{
HttpMethod = "GET",
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
descriptor3,
},
},
RouteData = new RouteData
{
Values =
{
{ "handler", "Add" }
}
},
HttpContext = new DefaultHttpContext
{
Request =
{
Method = "Post"
},
},
};
var selector = CreateSelector();
// Act & Assert
var ex = Assert.Throws <InvalidOperationException>(() => selector.Select(pageContext));
var methods = descriptor1.MethodInfo + ", " + descriptor2.MethodInfo;
var message = "Multiple handlers matched. The following handlers matched route data and had all constraints satisfied:" +
Environment.NewLine + Environment.NewLine + methods;
Assert.Equal(message, ex.Message);
}
public static PageHandlerExecutorDelegate CreateExecutor(HandlerMethodDescriptor handlerDescriptor)
{
if (handlerDescriptor == null)
{
throw new ArgumentNullException(nameof(handlerDescriptor));
}
var handler = CreateHandlerMethod(handlerDescriptor);
return(handler.Execute);
}
public HandlerMethodDescriptor Select(PageContext context)
{
var handlers = SelectHandlers(context);
if (handlers == null || handlers.Count == 0)
{
return(null);
}
List <HandlerMethodDescriptor> ambiguousMatches = null;
HandlerMethodDescriptor bestMatch = null;
for (var score = 2; score >= 0; score--)
{
for (var i = 0; i < handlers.Count; i++)
{
var handler = handlers[i];
if (GetScore(handler) == score)
{
if (bestMatch == null)
{
bestMatch = handler;
continue;
}
if (ambiguousMatches == null)
{
ambiguousMatches = new List <HandlerMethodDescriptor>
{
bestMatch
};
}
ambiguousMatches.Add(handler);
}
}
if (ambiguousMatches != null)
{
var ambiguousMethods = string.Join(", ", ambiguousMatches.Select(m => m.MethodInfo));
throw new InvalidOperationException(Resources.FormatAmbiguousHandler(Environment.NewLine, ambiguousMethods));
}
if (bestMatch != null)
{
return(bestMatch);
}
}
return(null);
}
public void Select_HandlerConsidersRouteDataFirst()
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
HttpMethod = "POST",
Name = "Add",
};
var descriptor2 = new HandlerMethodDescriptor
{
HttpMethod = "POST",
Name = "Delete",
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
},
},
RouteData = new RouteData
{
Values =
{
{ "handler", "Add" }
}
},
HttpContext = new DefaultHttpContext
{
Request =
{
Method = "Post",
QueryString = new QueryString("?handler=Delete"),
},
},
};
var selector = CreateSelector();
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Same(descriptor1, actual);
}
public void NewBehavior_Select_PrefersExactMatch_ReturnsNullWhenHandlerNameDoesntMatch()
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
HttpMethod = "GET"
};
var descriptor2 = new HandlerMethodDescriptor
{
HttpMethod = "POST"
};
// This will match the HTTP method 'round' of selection, but won't match the
// handler name.
var descriptor3 = new HandlerMethodDescriptor
{
HttpMethod = "HEAD",
Name = "not-provided",
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
descriptor3,
},
},
RouteData = new RouteData(),
HttpContext = new DefaultHttpContext
{
Request =
{
Method = "HEAD",
},
},
};
var selector = CreateSelector();
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Null(actual);
}
private static int GetScore(HandlerMethodDescriptor descriptor)
{
if (descriptor.Name != null)
{
return(2);
}
else if (descriptor.HttpMethod != null)
{
return(1);
}
else
{
return(0);
}
}
public void CreateExecutor_ThrowsIfTypeIsNotAValidReturnType(string methodName)
{
// Arrange
var methodInfo = typeof(TestPageModel).GetMethod(methodName);
var handler = new HandlerMethodDescriptor()
{
MethodInfo = methodInfo,
Parameters = CreateParameters(methodInfo),
};
// Act & Assert
var ex = Assert.Throws <InvalidOperationException>(() => ExecutorFactory.CreateExecutor(handler));
Assert.Equal($"Unsupported handler method return type '{methodInfo.ReturnType}'.", ex.Message);
}
public void Select_ReturnsHandlerThatMatchesHandler()
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
HttpMethod = "POST",
Name = "Add",
};
var descriptor2 = new HandlerMethodDescriptor
{
HttpMethod = "POST",
Name = "Delete",
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
},
},
RouteData = new RouteData
{
Values =
{
{ "handler", "Add" }
}
},
HttpContext = new DefaultHttpContext
{
Request =
{
Method = "Post"
},
},
};
var selector = CreateSelector();
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Same(descriptor1, actual);
}
public void Select_ReturnsHandlerThatMatchesHandler_UsesInvariantCulture()
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
HttpMethod = "POST",
Name = "10/31/2018 07:37:38 -07:00",
};
var descriptor2 = new HandlerMethodDescriptor
{
HttpMethod = "POST",
Name = "Delete",
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
},
},
RouteData = new RouteData
{
Values =
{
{ "handler", new DateTimeOffset(2018, 10, 31, 7, 37, 38, TimeSpan.FromHours(-7)) },
}
},
HttpContext = new DefaultHttpContext
{
Request =
{
Method = "Post"
},
},
};
var selector = CreateSelector();
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Same(descriptor1, actual);
}
public void NewBehavior_Select_PrefersExactMatch()
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
HttpMethod = "GET"
};
var descriptor2 = new HandlerMethodDescriptor
{
HttpMethod = "POST"
};
var descriptor3 = new HandlerMethodDescriptor
{
HttpMethod = "HEAD"
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
descriptor3,
},
},
RouteData = new RouteData(),
HttpContext = new DefaultHttpContext
{
Request =
{
Method = "HEAD",
},
},
};
var selector = CreateSelector();
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Same(descriptor3, actual);
}
public async Task CreateExecutor_ForMethodReturningConcreteSubtypeOfIActionResult()
{
// Arrange
var handler = new HandlerMethodDescriptor()
{
MethodInfo = typeof(TestPage).GetMethod(nameof(TestPage.ConcreteActionResult)),
Parameters = new HandlerParameterDescriptor[0],
};
// Act
var executor = ExecutorFactory.CreateExecutor(handler);
// Assert
Assert.NotNull(executor);
var actionResultTask = executor(new TestPage(), null);
var actionResult = await actionResultTask;
Assert.IsType <ViewResult>(actionResult);
}
public async Task CreateExecutor_ForTaskOfIActionResultReturningMethod()
{
// Arrange
var methodInfo = typeof(TestPage).GetMethod(nameof(TestPage.GenericTaskHandler));
var handler = new HandlerMethodDescriptor()
{
MethodInfo = methodInfo,
Parameters = CreateParameters(methodInfo),
};
// Act
var executor = ExecutorFactory.CreateExecutor(handler);
// Assert
Assert.NotNull(executor);
var actionResultTask = executor(new TestPage(), null);
var actionResult = await actionResultTask;
Assert.IsType <EmptyResult>(actionResult);
}
public async Task CreateExecutor_ForActionResultReturningMethod_WithParameters()
{
// Arrange
var methodInfo = typeof(TestPage).GetMethod(nameof(TestPage.ActionResultReturnHandlerWithParameters));
var handler = new HandlerMethodDescriptor()
{
MethodInfo = methodInfo,
Parameters = CreateParameters(methodInfo),
};
// Act
var executor = ExecutorFactory.CreateExecutor(handler);
// Assert
Assert.NotNull(executor);
var actionResultTask = executor(new TestPage(), CreateArguments(methodInfo));
var actionResult = await actionResultTask;
var contentResult = Assert.IsType <ContentResult>(actionResult);
Assert.Equal("Hello 0", contentResult.Content);
}
public void LegacyBehavior_Select_ReturnsNull_WhenNoHandlerMatchesHttpMethod()
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
HttpMethod = "GET"
};
var descriptor2 = new HandlerMethodDescriptor
{
HttpMethod = "POST"
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
},
},
RouteData = new RouteData(),
HttpContext = new DefaultHttpContext
{
Request =
{
Method = "PUT"
},
},
};
var selector = CreateSelector(legacyBehavior: true);
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Null(actual);
}
public void NewBehavior_Select_ReturnsFuzzyMatch_SafeVerbs(string httpMethod)
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
HttpMethod = "GET"
};
var descriptor2 = new HandlerMethodDescriptor
{
HttpMethod = "POST"
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
},
},
RouteData = new RouteData(),
HttpContext = new DefaultHttpContext
{
Request =
{
Method = httpMethod
},
},
};
var selector = CreateSelector();
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Same(descriptor1, actual);
}
public async Task CreateExecutor_ForVoidReturningMethod()
{
// Arrange
var handler = new HandlerMethodDescriptor()
{
MethodInfo = typeof(TestPage).GetMethod(nameof(TestPage.VoidReturningHandler)),
Parameters = new HandlerParameterDescriptor[0],
};
var page = new TestPage();
// Act
var executor = ExecutorFactory.CreateExecutor(handler);
// Assert
Assert.NotNull(executor);
var actionResultTask = executor(page, null);
var actionResult = await actionResultTask;
Assert.Null(actionResult);
Assert.True(page.SideEffects);
}
public void Select_ReturnsHandlerWithMatchingHttpRequestMethod(string httpMethod)
{
// Arrange
var descriptor1 = new HandlerMethodDescriptor
{
HttpMethod = "PUT",
};
var descriptor2 = new HandlerMethodDescriptor
{
HttpMethod = httpMethod,
};
var pageContext = new PageContext
{
ActionDescriptor = new CompiledPageActionDescriptor
{
HandlerMethods = new List <HandlerMethodDescriptor>()
{
descriptor1,
descriptor2,
},
},
RouteData = new RouteData(),
HttpContext = new DefaultHttpContext
{
Request =
{
Method = httpMethod,
},
},
};
var selector = CreateSelector();
// Act
var actual = selector.Select(pageContext);
// Assert
Assert.Same(descriptor2, actual);
}
public HandlerMethodAndMetadata(HandlerMethodDescriptor handler, string httpMethod, string formaction)
{
Handler = handler;
HttpMethod = httpMethod;
Formaction = formaction;
}
private Task Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
{
switch (next)
{
case State.PageBegin:
{
_instance = CreateInstance();
goto case State.PageSelectHandlerBegin;
}
case State.PageSelectHandlerBegin:
{
_cursor.Reset();
_handler = SelectHandler();
goto case State.PageSelectHandlerNext;
}
case State.PageSelectHandlerNext:
var currentSelector = _cursor.GetNextFilter<IPageFilter, IAsyncPageFilter>();
if (currentSelector.FilterAsync != null)
{
if (_handlerSelectedContext == null)
{
_handlerSelectedContext = new PageHandlerSelectedContext(_pageContext, _filters, _instance)
{
HandlerMethod = _handler,
};
}
state = currentSelector.FilterAsync;
goto case State.PageSelectHandlerAsyncBegin;
}
else if (currentSelector.Filter != null)
{
if (_handlerSelectedContext == null)
{
_handlerSelectedContext = new PageHandlerSelectedContext(_pageContext, _filters, _instance)
{
HandlerMethod = _handler,
};
}
state = currentSelector.Filter;
goto case State.PageSelectHandlerSync;
}
else
{
goto case State.PageSelectHandlerEnd;
}
case State.PageSelectHandlerAsyncBegin:
{
Debug.Assert(state != null);
Debug.Assert(_handlerSelectedContext != null);
var filter = (IAsyncPageFilter)state;
var handlerSelectedContext = _handlerSelectedContext;
_diagnosticListener.BeforeOnPageHandlerSelection(handlerSelectedContext, filter);
_logger.BeforeExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IAsyncPageFilter.OnPageHandlerSelectionAsync),
filter);
var task = filter.OnPageHandlerSelectionAsync(handlerSelectedContext);
if (task.Status != TaskStatus.RanToCompletion)
{
next = State.PageSelectHandlerAsyncEnd;
return task;
}
goto case State.PageSelectHandlerAsyncEnd;
}
case State.PageSelectHandlerAsyncEnd:
{
Debug.Assert(state != null);
Debug.Assert(_handlerSelectedContext != null);
var filter = (IAsyncPageFilter)state;
_diagnosticListener.AfterOnPageHandlerSelection(_handlerSelectedContext, filter);
_logger.AfterExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IAsyncPageFilter.OnPageHandlerSelectionAsync),
filter);
goto case State.PageSelectHandlerNext;
}
case State.PageSelectHandlerSync:
{
Debug.Assert(state != null);
Debug.Assert(_handlerSelectedContext != null);
var filter = (IPageFilter)state;
var handlerSelectedContext = _handlerSelectedContext;
_diagnosticListener.BeforeOnPageHandlerSelected(handlerSelectedContext, filter);
_logger.BeforeExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IPageFilter.OnPageHandlerSelected),
filter);
filter.OnPageHandlerSelected(handlerSelectedContext);
_diagnosticListener.AfterOnPageHandlerSelected(handlerSelectedContext, filter);
goto case State.PageSelectHandlerNext;
}
case State.PageSelectHandlerEnd:
{
if (_handlerSelectedContext != null)
{
_handler = _handlerSelectedContext.HandlerMethod;
}
_arguments = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
_cursor.Reset();
var task = BindArgumentsAsync();
if (task.Status != TaskStatus.RanToCompletion)
{
next = State.PageNext;
return task;
}
goto case State.PageNext;
}
case State.PageNext:
{
var current = _cursor.GetNextFilter<IPageFilter, IAsyncPageFilter>();
if (current.FilterAsync != null)
{
if (_handlerExecutingContext == null)
{
_handlerExecutingContext = new PageHandlerExecutingContext(_pageContext, _filters, _handler, _arguments, _instance);
}
state = current.FilterAsync;
goto case State.PageAsyncBegin;
}
else if (current.Filter != null)
{
if (_handlerExecutingContext == null)
{
_handlerExecutingContext = new PageHandlerExecutingContext(_pageContext, _filters, _handler, _arguments, _instance);
}
state = current.Filter;
goto case State.PageSyncBegin;
}
else
{
goto case State.PageInside;
}
}
case State.PageAsyncBegin:
{
Debug.Assert(state != null);
Debug.Assert(_handlerExecutingContext != null);
var filter = (IAsyncPageFilter)state;
var handlerExecutingContext = _handlerExecutingContext;
_diagnosticListener.BeforeOnPageHandlerExecution(handlerExecutingContext, filter);
_logger.BeforeExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IAsyncPageFilter.OnPageHandlerExecutionAsync),
filter);
var task = filter.OnPageHandlerExecutionAsync(handlerExecutingContext, InvokeNextPageFilterAwaitedAsync);
if (task.Status != TaskStatus.RanToCompletion)
{
next = State.PageAsyncEnd;
return task;
}
goto case State.PageAsyncEnd;
}
case State.PageAsyncEnd:
{
Debug.Assert(state != null);
Debug.Assert(_handlerExecutingContext != null);
var filter = (IAsyncPageFilter)state;
if (_handlerExecutedContext == null)
{
// If we get here then the filter didn't call 'next' indicating a short circuit.
_logger.PageFilterShortCircuited(filter);
_handlerExecutedContext = new PageHandlerExecutedContext(
_pageContext,
_filters,
_handler,
_instance)
{
Canceled = true,
Result = _handlerExecutingContext.Result,
};
}
_diagnosticListener.AfterOnPageHandlerExecution(_handlerExecutedContext, filter);
_logger.AfterExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IAsyncPageFilter.OnPageHandlerExecutionAsync),
filter);
goto case State.PageEnd;
}
case State.PageSyncBegin:
{
Debug.Assert(state != null);
Debug.Assert(_handlerExecutingContext != null);
var filter = (IPageFilter)state;
var handlerExecutingContext = _handlerExecutingContext;
_diagnosticListener.BeforeOnPageHandlerExecuting(handlerExecutingContext, filter);
_logger.BeforeExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IPageFilter.OnPageHandlerExecuting),
filter);
filter.OnPageHandlerExecuting(handlerExecutingContext);
_diagnosticListener.AfterOnPageHandlerExecuting(handlerExecutingContext, filter);
_logger.AfterExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IPageFilter.OnPageHandlerExecuting),
filter);
if (handlerExecutingContext.Result != null)
{
// Short-circuited by setting a result.
_logger.PageFilterShortCircuited(filter);
_handlerExecutedContext = new PageHandlerExecutedContext(
_pageContext,
_filters,
_handler,
_instance)
{
Canceled = true,
Result = _handlerExecutingContext.Result,
};
goto case State.PageEnd;
}
var task = InvokeNextPageFilterAsync();
if (task.Status != TaskStatus.RanToCompletion)
{
next = State.PageSyncEnd;
return task;
}
goto case State.PageSyncEnd;
}
case State.PageSyncEnd:
{
Debug.Assert(state != null);
Debug.Assert(_handlerExecutingContext != null);
Debug.Assert(_handlerExecutedContext != null);
var filter = (IPageFilter)state;
var handlerExecutedContext = _handlerExecutedContext;
_diagnosticListener.BeforeOnPageHandlerExecuted(handlerExecutedContext, filter);
_logger.BeforeExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IPageFilter.OnPageHandlerExecuted),
filter);
filter.OnPageHandlerExecuted(handlerExecutedContext);
_diagnosticListener.AfterOnPageHandlerExecuted(handlerExecutedContext, filter);
_logger.AfterExecutingMethodOnFilter(
PageLoggerExtensions.PageFilter,
nameof(IPageFilter.OnPageHandlerExecuted),
filter);
goto case State.PageEnd;
}
case State.PageInside:
{
var task = InvokeHandlerMethodAsync();
if (task.Status != TaskStatus.RanToCompletion)
{
next = State.PageEnd;
return task;
}
goto case State.PageEnd;
}
case State.PageEnd:
{
if (scope == Scope.Page)
{
if (_handlerExecutedContext == null)
{
_handlerExecutedContext = new PageHandlerExecutedContext(_pageContext, _filters, _handler, _instance)
{
Result = _result,
};
}
isCompleted = true;
return Task.CompletedTask;
}
var handlerExecutedContext = _handlerExecutedContext;
Rethrow(handlerExecutedContext);
if (handlerExecutedContext != null)
{
_result = handlerExecutedContext.Result;
}
isCompleted = true;
return Task.CompletedTask;
}
default:
throw new InvalidOperationException();
}
}
public static PageHandlerBinderDelegate CreateHandlerBinder(
ParameterBinder parameterBinder,
IModelMetadataProvider modelMetadataProvider,
IModelBinderFactory modelBinderFactory,
CompiledPageActionDescriptor actionDescriptor,
HandlerMethodDescriptor handler,
MvcOptions mvcOptions)
{
if (handler.Parameters == null || handler.Parameters.Count == 0)
{
return(NullHandlerBinder);
}
var handlerType = actionDescriptor.HandlerTypeInfo.AsType();
var parameterBindingInfo = new BinderItem[handler.Parameters.Count];
for (var i = 0; i < parameterBindingInfo.Length; i++)
{
var parameter = handler.Parameters[i];
ModelMetadata metadata;
if (modelMetadataProvider is ModelMetadataProvider modelMetadataProviderBase)
{
// The default model metadata provider derives from ModelMetadataProvider
// and can therefore supply information about attributes applied to parameters.
metadata = modelMetadataProviderBase.GetMetadataForParameter(parameter.ParameterInfo);
}
else
{
// For backward compatibility, if there's a custom model metadata provider that
// only implements the older IModelMetadataProvider interface, access the more
// limited metadata information it supplies. In this scenario, validation attributes
// are not supported on parameters.
metadata = modelMetadataProvider.GetMetadataForType(parameter.ParameterType);
}
var binder = modelBinderFactory.CreateBinder(new ModelBinderFactoryContext
{
BindingInfo = parameter.BindingInfo,
Metadata = metadata,
CacheToken = parameter,
});
parameterBindingInfo[i] = new BinderItem(binder, metadata);
}
return(Bind);
async Task Bind(PageContext pageContext, IDictionary <string, object?> arguments)
{
var(success, valueProvider) = await CompositeValueProvider.TryCreateAsync(pageContext, pageContext.ValueProviderFactories);
if (!success)
{
return;
}
for (var i = 0; i < parameterBindingInfo.Length; i++)
{
var parameter = handler.Parameters[i];
var bindingInfo = parameterBindingInfo[i];
var modelMetadata = bindingInfo.ModelMetadata;
if (!modelMetadata.IsBindingAllowed)
{
continue;
}
var result = await parameterBinder.BindModelAsync(
pageContext,
bindingInfo.ModelBinder,
valueProvider !,
parameter,
modelMetadata,
value : null,
container : null); // Parameters do not have containers.
if (result.IsModelSet)
{
arguments[parameter.Name] = result.Model;
}
}
}
}
public static HandlerMethodDescriptorDebugObject GetDebugObject(this HandlerMethodDescriptor handlerMethodDescriptor) => new HandlerMethodDescriptorDebugObject(handlerMethodDescriptor);