Question

我仅使用一种中间件运行WebAPI，并且添加Content-Length标头时无法设置响应HTTP状态代码。带Content-Length标头的状态码默认为200 OK（与长度无关，为零或非零）。如果我不添加Content-Length标头，则设置状态代码会很好。

我正在使用OnSendingHeaders（）并能够在响应中添加标头并设置响应主体，但是设置状态不起作用。

为什么Content-Length标头会干扰状态码？谢谢！

我将这个问题发布为我创建的其他线程（OWIN Middleware not able to set http status code）的后续内容。创建此新线程以提高可见性。

public class Startup
{
    public void Configuration(IAppBuilder appBuilder)
    {
        appBuilder.Use(typeof(SampleMiddleware));
    }
}

public class SampleMiddleware : OwinMiddleware
{
    private string _responseBody = null;

    public SampleMiddleware(OwinMiddleware next) : base(next)
    {
    }

    public async override Task Invoke(IOwinContext context)
    {
        await ProcessIncomingRequest();

        context.Response.OnSendingHeaders(state =>
        {
            var cntxt = (IOwinContext)state;
            SetResponseMessage(cntxt);
        }, context);
    }

    private void SetResponseMessage(IOwinContext context)
    {
        //Setting status code
        context.Response.StatusCode = 201;

        //Setting headers
        context.Response.Headers.Add("XYZ", new[] { "Value-1" });
        context.Response.Headers.Add("ABC", new[] { "Value-2" });

        //Status code is not getting set and default to 200 OK when I add Content-Length header
        //Without Content-Length header, setting response http status code works
        context.Response.Headers.Add("Content-Length", new[] { string.Format("{0}", _responseBody.Length) });

        //Setting response body
        context.Response.Write(_responseBody);
    }

    private async Task ProcessIncomingRequest()
    {
        // Process request
        //await ProcessingFunc();

        // Set response body
        _responseBody = "Response body based on above processing";
    }
}

OWIN中间件-添加Content-Length标头时未设置响应HTTP状态代码

0 个答案: