50 lines
2.0 KiB
C#
50 lines
2.0 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System.Linq;
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using Microsoft.AspNet.Mvc;
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using Microsoft.AspNet.Mvc.Filters;
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using Microsoft.AspNet.Mvc.ModelBinding;
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namespace FormatterWebSite
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{
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public class ValidateBodyParameterAttribute : ActionFilterAttribute
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{
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public override void OnActionExecuting(ActionExecutingContext context)
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{
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if (!context.ModelState.IsValid)
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{
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var bodyParameter = context.ActionDescriptor
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.Parameters
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.FirstOrDefault(parameter => IsBodyBindingSource(
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parameter.BindingInfo?.BindingSource));
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if (bodyParameter != null)
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{
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// Body model binder normally reports errors for parameters using the empty name.
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var parameterBindingErrors = context.ModelState[bodyParameter.Name]?.Errors ??
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context.ModelState[string.Empty]?.Errors;
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if (parameterBindingErrors != null && parameterBindingErrors.Count != 0)
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{
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var errorInfo = new ErrorInfo
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{
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ActionName = context.ActionDescriptor.Name,
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ParameterName = bodyParameter.Name,
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Errors = parameterBindingErrors.Select(x => x.ErrorMessage).ToList(),
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Source = "filter"
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};
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context.Result = new ObjectResult(errorInfo);
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}
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}
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}
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base.OnActionExecuting(context);
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}
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private bool IsBodyBindingSource(BindingSource bindingSource)
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{
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return bindingSource?.CanAcceptDataFrom(BindingSource.Body) ?? false;
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}
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}
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}
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