.NET Framework 4.8 - 返回 OnActionExecuting(HttpActionContext actionContext) 错误 406 的内容

Question

我确实将resp存储在

OnActionExecuted(HttpActionExecutedContext actionExecutedContext)

中的

CacheManagerService

上，但是当我想在

OnActionExecuting(HttpActionContext actionContext)

中使用它时，它将返回http 406或http 500，没有描述。

using System.Net.Http;
using System.Net;
using Newtonsoft.Json;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using System.Web.Http;

namespace ***.Mvc.ActionFilters
{
    public class SampleAttribute : ActionFilterAttribute
    {
        public override async void OnActionExecuting(HttpActionContext actionContext)
        {
            base.OnActionExecuting(actionContext);

            var respCache = GetCache(key);

            if (respCache != null)
            {
                actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.OK, await resp.ReadAsAsync(typeof(object)));
            }
        }

        public override async void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
        {
            base.OnActionExecuted(actionExecutedContext);
            SetCache(key,actionExecutedContext.Response.Content);
        }
    }
}

注意：它确实可以与

Task<someClass>

配合使用，但当我在

Task<IHttpActionResult> ODataController

上使用它时，问题就出现了

有人知道如何解决这个问题吗？

Answer 1

在我朋友的帮助下，我们找到了解决方案。

using System.Net.Http;
using System.Net;
using Newtonsoft.Json;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using System.Web.Http;

namespace ***.Mvc.ActionFilters
{
    public class SampleAttribute : ActionFilterAttribute
    {
        public override async void OnActionExecuting(HttpActionContext actionContext)
        {
            base.OnActionExecuting(actionContext);

            var respCache = GetCache(key);

            if (respCache != null)
            {
                **var resp = (HttpContent)respCache;
                var value = await resp.ReadAsAsync(typeof(object));
                HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
                response.Content = new ObjectContent(value.GetType(), value, GlobalConfiguration.Configuration.Formatters.JsonFormatter);
                actionContext.Response = response;**
            }
        }

        public override async void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
        {
            base.OnActionExecuted(actionExecutedContext);
            SetCache(key,actionExecutedContext.Response.Content);
        }
    }
}