Question

在基本控制器上使用RedirectPermanent（url）方法时，我在MVC3应用程序中收到此错误。其他StackOverflow答案建议的缓冲输出没有任何效果。

protected void Application_BeginRequest(object sender, EventArgs e)
{
   Context.Response.BufferOutput = true;
}

重定向作为此网站上默认控制器的第一个操作结果触发： http://www.autoquoter.com

我没有任何直接添加标题的代码。既然如此，有没有办法确定添加响应头的内容？

以下是来自webkit网站第一页的调试器的网络日志。

Request URL:http://www.autoquoter.com/
Request Method:GET
Status Code:301 Moved Permanently

Request Headers
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
User-Agent:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/534.57.2 (KHTML, like Gecko) Version/5.1.7 Safari/534.57.2

Response Headers
Cache-Control:no-cache, no-store, must-revalidate
Content-Length:128
Content-Type:text/html; charset=utf-8
Date:Thu, 21 Mar 2013 17:10:38 GMT
Expires:-1
Location:/aq/en/Home
Pragma:no-cache
Server:Microsoft-IIS/6.0
X-AspNet-Version:4.0.30319
X-AspNetMvc-Version:3.0
X-Powered-By:ASP.NET

Answer 1

看起来我已经解决了这个问题。基于主机名的另一个重定向隐藏在NoCacheAttribute过滤器内。这是在OnResultExecuting方法中设置Response对象的属性。

我将方法重命名为OnActionExecuting，以便更快地触发，并用RedirectResult替换手动重定向。如果我已经重定向，我现在也避免更新缓存设置。

在：

 if (currentHost != prefHost && filterContext.HttpContext.Response.StatusCode != 301)
 {
      var Url = filterContext.HttpContext.Request.Url.Scheme + "://" + prefHost + filterContext.HttpContext.Request.Url.PathAndQuery;
      filterContext.HttpContext.Response.StatusCode = 301;
      filterContext.HttpContext.Response.RedirectLocation = Url;
      filterContext.HttpContext.Response.End();
      return;
 }
 filterContext.HttpContext.Response.Cache.SetExpires(DateTime.UtcNow.AddDays(-1)); 
 filterContext.HttpContext.Response.Cache.SetValidUntilExpires(false); 
 filterContext.HttpContext.Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches); 
 filterContext.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache); 
 filterContext.HttpContext.Response.Cache.SetNoStore();

后：

 if (currentHost != prefHost && filterContext.HttpContext.Response.StatusCode != 301)
 {
      var Url = filterContext.HttpContext.Request.Url.Scheme + "://" + prefHost + filterContext.HttpContext.Request.Url.PathAndQuery;
      filterContext.Result = new RedirectResult(Url, true);
      disableCache = false;
 }


    if (disableCache)
    {
        filterContext.HttpContext.Response.Cache.SetExpires(DateTime.UtcNow.AddDays(-1));
        filterContext.HttpContext.Response.Cache.SetValidUntilExpires(false);
        filterContext.HttpContext.Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
        filterContext.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache);
        filterContext.HttpContext.Response.Cache.SetNoStore();
    }
    base.OnActionExecuting(filterContext);

HTTP标头发送MVC3后无法重定向

1 个答案: