Question

onFormSubmit = (term) => { this.props.fetchList(term); this.props.defaultVideo(term); this.props.history.push('/'); };导致以下错误格式：

ValidationAttribute

我想为未处理的异常编写一个自定义错误处理程序。 asp.net core mvc是否提供我可以重复使用的标准错误响应格式？

Answer 1

从2.1版开始，ASP.NET Core MVC附带了一个ProblemDetails类，可以使用或扩展该类以提供应用程序中的常见错误响应格式。它是根据RFC7808建模的。问题中发布的错误json是从ValidationProblemDetails扩展的ProblemDetails的实例。

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

namespace Microsoft.AspNetCore.Mvc
{
    /// <summary>
    /// A machine-readable format for specifying errors in HTTP API responses based on https://tools.ietf.org/html/rfc7807.
    /// </summary>
    public class ProblemDetails
    {
        /// <summary>
        /// A URI reference [RFC3986] that identifies the problem type. This specification encourages that, when
        /// dereferenced, it provide human-readable documentation for the problem type
        /// (e.g., using HTML [W3C.REC-html5-20141028]).  When this member is not present, its value is assumed to be
        /// "about:blank".
        /// </summary>
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, PropertyName = "type")]
        public string Type { get; set; }

        /// <summary>
        /// A short, human-readable summary of the problem type.It SHOULD NOT change from occurrence to occurrence
        /// of the problem, except for purposes of localization(e.g., using proactive content negotiation;
        /// see[RFC7231], Section 3.4).
        /// </summary>
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, PropertyName = "title")]
        public string Title { get; set; }

        /// <summary>
        /// The HTTP status code([RFC7231], Section 6) generated by the origin server for this occurrence of the problem.
        /// </summary>
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, PropertyName = "status")]
        public int? Status { get; set; }

        /// <summary>
        /// A human-readable explanation specific to this occurrence of the problem.
        /// </summary>
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, PropertyName = "detail")]
        public string Detail { get; set; }

        /// <summary>
        /// A URI reference that identifies the specific occurrence of the problem.It may or may not yield further information if dereferenced.
        /// </summary>
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore, PropertyName = "instance")]
        public string Instance { get; set; }

        /// <summary>
        /// Gets the <see cref="IDictionary{TKey, TValue}"/> for extension members.
        /// <para>
        /// Problem type definitions MAY extend the problem details object with additional members. Extension members appear in the same namespace as
        /// other members of a problem type.
        /// </para>
        /// </summary>
        /// <remarks>
        /// The round-tripping behavior for <see cref="Extensions"/> is determined by the implementation of the Input \ Output formatters.
        /// In particular, complex types or collection types may not round-trip to the original type when using the built-in JSON or XML formatters.
        /// </remarks>
        [JsonExtensionData]
        public IDictionary<string, object> Extensions { get; } = new Dictionary<string, object>(StringComparer.Ordinal);
    }
}

Answer 2

您所说的只是从ModelState进行的序列化，当控制器应用了[ApiController]属性并且ModelState.IsValid为false时，序列化将自动完成。您可以通过指定自定义InvalidModelStateResponseFactory来替换或更改此行为：

services.Configure<ApiBehaviorOptions>(options =>
{
    options.InvalidModelStateResponseFactory = actionContext => 
    {
        // build the response object you want

        return new BadRequestObjectResult(myErrorResponseObject);
    }
});

或者，您可以完全抑制此自动400响应，并根据需要进行处理：直接在您的操作，自定义操作过滤器等中

services.Configure<ApiBehaviorOptions>(options =>
{
    options.SuppressModelStateInvalidFilter = true;
});

ASP.NET Core MVC是否提供标准的错误响应格式？

2 个答案: