웹 API .net 코어 3.1에서 문자열 대신 int를 전달할 때 400 잘못된 요청

400의 경우 사용자 지정 응답을 정의하려면 다음을 수행 할 수 있습니다.

핸들러

모델 바인딩 오류를 포착하려면 ApiBehaviorOptions의 InvalidModelStateResponseFactory( 1 )에 대한 처리기를 연결해야합니다 .

필수 델리게이트는 매우 일반적입니다 : Func<ActionContext, IActionResult>. 따라서 먼저이를위한 인터페이스를 생성 해 보겠습니다.

public interface IModelBindingErrorHandler
{
    IActionResult HandleInvalidModelState(ActionContext context);
}

다음은 간단한 핸들러 구현입니다.

public class ModelBindingErrorHandler : IModelBindingErrorHandler
{
    private ICorrelationContextAccessor correlationContextAccessor;
    private ILogger logger;

    public ModelBindingErrorHandler(ICorrelationContextAccessor correlationContextAccessor, ILogger logger)
    {
        this.correlationContextAccessor = correlationContextAccessor;
        this.logger = logger;
    }

    public IActionResult HandleInvalidModelState(ActionContext context)
    {
        string correlationId = correlationContextAccessor.CorrelationContext?.CorrelationId;

        var modelErrors = context.ModelState
            .Where(stateEntry => stateEntry.Value.Errors.Any())
            .Select(stateEntry => new InvalidData
            {
                FieldName = stateEntry.Key,
                Errors = stateEntry.Value.Errors.Select(error => error.ErrorMessage).ToArray()
            });

        logger.LogError("The request contained malformed input.", modelErrors);

        var responseBody = new GlobalErrorModel
        {
            ErrorMessage = "Sorry, the request contains invalid data. Please revise.", 
            ErrorTracingId = correlationId
        };
    
        return new BadRequestObjectResult(responseBody);
    }
}

도우미 클래스

public class GlobalErrorModel
{
    public string ErrorMessage { get; set; }
    public string ErrorTracingId { get; set; }
}

public class InvalidData
{
    public string FieldName { get; set; }
    public string[] Errors { get; set; }

    public override string ToString() => $"{FieldName}: {string.Join("; ", Errors)}";
}

자체 등록

public static class ModelBindingErrorHandlerRegister
{
    /// <summary>
    /// This method should be called after <b>AddControllers();</b> call.
    /// </summary>
    public static IServiceCollection AddModelBinderErrorHandler(this IServiceCollection services)
    {
        return AddModelBinderErrorHandler<ModelBindingErrorHandler>(services);
    }

    /// <summary>
    /// This method can be used to register a custom Model binder's error handler.
    /// </summary>
    /// <typeparam name="TImpl">A custom implementation of <see cref="IModelBindingErrorHandler"/></typeparam>
    public static IServiceCollection AddModelBinderErrorHandler<TImpl>(this IServiceCollection services)
        where TImpl : class, IModelBindingErrorHandler
    {
        services.AddSingleton<IModelBindingErrorHandler, TImpl>();

        var serviceProvider = services.BuildServiceProvider();
        var handler = serviceProvider.GetService<IModelBindingErrorHandler>();
        services.PostConfigure((ApiBehaviorOptions options) =>
            options.InvalidModelStateResponseFactory = handler.HandleInvalidModelState);

        return services;
    }
}

용법

public partial class Startup
{
    private readonly IConfiguration Configuration;

    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddControllers()
            .AddNewtonsoftJson();
        
        //Omited for brevity
        
        services.AddModelBinderErrorHandler();
    }
    
    //Omited for brevity
}