相关疑难解决方法(0)

请有人知道如何在asp.net Web API 2.1中跟随三个模块一起工作

• Owin中间件
• HttpMessageHandler(或DelegatingHandler)
• 的ExceptionHandler

我所试图做的是开发和Web API,它将会提供恒定的格式JSON数据,意味着如果实际数据

{"Id":1,"UserName":"abc","Email":"abc@xyz.com"}

然后我喜欢把json作为

{__d:{"Id":1,"UserName":"abc","Email":"abc@xyz.com"}, code:200, somekey: "somevalue"}

为此,我尝试使用自定义ActionFilterAttribute但我觉得(仍未确认)在代码遇到异常的情况下,这无法提供类似的格式化数据

请建议我最好的方向.

这是我的自定义属性的简短代码片段.另外建议我是自定义属性是有益的

[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = false)]
public class ResponseNormalizationAttribute : ActionFilterAttribute
{
    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {
            base.OnActionExecuted(actionExecutedContext);
            var response = actionExecutedContext.Response;
            object contentValue;
            if (response.TryGetContentValue(out contentValue))
            {
                var nval = new { data=contentValue, status = 200 };


                var newResponse = new HttpResponseMessage { Content = new ObjectContent(nval.GetType(), nval, new JsonMediaTypeFormatter()) };
                newResponse.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json"); …

我需要ModelState在Asp.net Core 2.1中间件中进行访问，但这仅可从访问Controller。

例如，我有ResponseFormatterMiddleware一个中间件，在这个中间件中，我需要忽略ModelState错误，并在“响应消息”中显示错误：

public class ResponseFormatterMiddleware
{
    private readonly RequestDelegate _next;
    private readonly ILogger<ResponseFormatterMiddleware> _logger;
    public ResponseFormatterMiddleware(RequestDelegate next, ILoggerFactory loggerFactory)
    {
        _next = next ?? throw new ArgumentNullException(nameof(next));
        _logger = loggerFactory?.CreateLogger<ResponseFormatterMiddleware>() ?? throw new ArgumentNullException(nameof(loggerFactory));
    }

    public async Task Invoke(HttpContext context)
    {
        var originBody = context.Response.Body;

        using (var responseBody = new MemoryStream())
        {
            context.Response.Body = responseBody;
            // Process inner middlewares and return result.
            await _next(context);

            responseBody.Seek(0, SeekOrigin.Begin);
            using (var streamReader = …