87 lines
3.7 KiB
C#
87 lines
3.7 KiB
C#
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// This software is part of the Autofac IoC container
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// Copyright © 2011 Autofac Contributors
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// http://autofac.org
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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using System;
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using System.Web.Mvc;
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namespace Autofac.Integration.Mvc
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{
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/// <summary>
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/// Injects services from the container into the ASP.NET MVC invocation pipeline.
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/// This is a Async Controller Action Invoker which can be used for both async and non-async scenarios
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/// </summary>
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/// <remarks>
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/// <para>
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/// Action methods can include parameters that will be resolved from the
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/// container, along with regular parameters.
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/// </para>
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/// </remarks>
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public class ExtensibleActionInvoker : System.Web.Mvc.Async.AsyncControllerActionInvoker
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{
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/// <summary>
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/// Gets the parameter value.
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/// </summary>
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/// <param name="controllerContext">The controller context.</param><param name="parameterDescriptor">The parameter descriptor.</param>
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/// <returns>
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/// The parameter value.
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/// </returns>
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/// <exception cref="System.ArgumentNullException">
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/// Thrown if <paramref name="parameterDescriptor" /> is <see langword="null" />.
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/// </exception>
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protected override object GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor)
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{
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if (parameterDescriptor == null)
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{
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throw new ArgumentNullException("parameterDescriptor");
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}
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// Only resolve parameter values if injection is enabled.
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var context = AutofacDependencyResolver.Current.RequestLifetimeScope;
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var value = context.ResolveOptional(parameterDescriptor.ParameterType);
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if (value == null)
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{
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// Issue #368
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// If injection is enabled and the value can't be resolved, fall back to
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// the default behavior. Or if injection isn't enabled, fall back.
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// Unfortunately we can't do much to pre-determine if model binding will succeed
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// because model binding "knows" about a lot of stuff like arrays, certain generic
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// collection types, type converters, and other stuff that may or may not fail.
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try
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{
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value = base.GetParameterValue(controllerContext, parameterDescriptor);
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}
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catch (MissingMethodException)
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{
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// Don't do anything - this means the default model binder couldn't
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// activate a new instance or figure out some other way to model
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// bind it.
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}
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}
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return value;
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}
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}
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}
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