请求未被 413 状态码拒绝

Request not being denied with 413 status code

需要拒绝具有任何正文内容的请求(意味着 body 大小 > 0)。我尝试使用 RequestSizeLimit 属性,但它似乎无法正常工作。

代码:

    [HttpPost]
    [RequestSizeLimit(0)]
    public IActionResult Test()
    {

        return Ok();
    }

我正在使用 Postman 进行测试。提供 "qwerty" 作为 POST 请求正文的值。这是 Kestrel 日志的样子:

info: Microsoft.AspNetCore.Server.Kestrel[17] Connection id "0HLN06I1687S4" bad request data: "Request body too large." Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException: Request body too large. at Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException.Throw(RequestRejectionReason reason) at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Http1MessageBody.ForContentLength.OnReadStarting() at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.MessageBody.TryStart() at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.MessageBody.ConsumeAsync() at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication 1 application) at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequestsAsync[TContext](IHttpApplication 1 application)

尽管如此 - 我仍然看到 200 (OK) 响应。我可以毫无问题地调试该方法。看起来 - 过滤器工作正常 - 但由于某种原因它没有触发异常。预期的行为 - 是 "payload too large" (413) 为请求返回的状态,并且未触发方法中的代码执行。

任何想法或解释 - 为什么我会看到这种行为?

这不是问题的答案,而是我的问题的解决方案。我自己编写了一个按预期工作的操作过滤器的实现。

public class PayloadMaximumSizeFilter : ActionFilterAttribute
{
    private long _maxContentLength;
    private string _message;

    public PayloadMaximumSizeFilter(long maxContentLength)
    {
        this._maxContentLength = maxContentLength;
    }

    public PayloadMaximumSizeFilter(long maxContentLength, string message)
    {
        this._maxContentLength = maxContentLength;
        this._message = message;
    }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        long? contentLength = filterContext.HttpContext.Request.ContentLength;
        if (contentLength.HasValue && contentLength.Value > _maxContentLength)
        {
            filterContext.Result = new JsonResult(filterContext.ModelState)
            {
                Value = _message ?? "Request body too large.",
                StatusCode = 413
            };
        }
    }

}