如何将HttpRequestBase转换为HttpRequest对象？

Question 1

在ASP.NET MVC控制器内部，我有一个需要HttpRequest对象的方法。我只能访问的是一个HttpRequestBase对象。

无论如何，我可以通过某种方式进行转换吗？

我能/应该做什么？

Question 2

是您的方法，因此您可以重新编写它以使用HttpRequestBase？如果没有，你总是可以得到当前HttpRequest的HttpContext.Current.HttpRequest转嫁。但是，我经常将对HttpContext的访问包装在ASP.NET中提到的类中：删除System.Web依赖关系以获得更好的单元测试支持。

Question 3

您应该始终在应用程序中使用HttpRequestBase和HttpResponseBase，而不是无法测试的具体版本（没有typemock或其他魔术）。

只需使用HttpRequestWrapper类进行转换，如下所示。

var httpRequestBase = new HttpRequestWrapper(Context.Request);

Question 4

你可以用

System.Web.HttpContext.Current.Request

这里的关键是您需要完整的名称空间才能进入“正确的” HttpContext。

我知道问这个问题已经有4年了，但是如果这对某人有帮助，那么您来了！

（编辑：我看到Kevin Hakanson已经给出了这个答案...所以希望我的回答将对那些只阅读答案而不是发表评论的人有所帮助。）:)

Question 5

尝试使用HttpRequestBase使用/创建HttpRequestWrapper。

Question 6

要在ASP.NET MVC4 .NET 4.5中获取HttpRequest，可以执行以下操作：

this.HttpContext.ApplicationInstance.Context.Request

Question 7

通常，当您需要HttpContext在控制器操作中访问属性时，可以做一些更好的明智设计。

例如，如果您需要访问当前用户，请为您的操作方法提供一个类型为的参数，并在测试时根据需要IPrincipal使用Attribute和填充该参数。有关此操作的小示例，请参阅此博客文章，特别是第7点。

Question 8

无法在这些类型之间进行转换。

我们有一个类似的案例。我们重写了类/ Web服务方法，以便它们使用HttpContextBase，HttpApplicationStateBase，HttpServerUtilityBase，HttpSessionStateBase ...而不是没有“ Base”后缀的关闭名称类型（HttpContext，... HttpSessionState）。使用自制的模拟，它们要容易得多。

对不起，您不能这样做。

Question 9

这是一个ASP.Net MVC 3.0 AsyncController，它接受请求，将入站HttpRequestBase MVC对象转换为System.Web.HttpWebRequest。然后，它异步发送请求。当响应返回时，它将System.Web.HttpWebResponse转换回MVC HttpResponseBase对象，该对象可以通过MVC控制器返回。

为了明确回答这个问题，我想您只会对BuildWebRequest（）函数感兴趣。但是，它演示了如何遍历整个管道-从BaseRequest> Request然后是Response> BaseResponse转换。我认为共享两者将很有用。

通过这些类，您可以拥有充当Web代理的MVC服务器。

希望这可以帮助！

控制器：

[HandleError]
public class MyProxy : AsyncController
{
    [HttpGet]
    public void RedirectAsync()
    {
        AsyncManager.OutstandingOperations.Increment();

        var hubBroker = new RequestBroker();
        hubBroker.BrokerCompleted += (sender, e) =>
        {
            this.AsyncManager.Parameters["brokered"] = e.Response;
            this.AsyncManager.OutstandingOperations.Decrement();
        };

        hubBroker.BrokerAsync(this.Request, redirectTo);
   }

    public ActionResult RedirectCompleted(HttpWebResponse brokered)
    {
        RequestBroker.BuildControllerResponse(this.Response, brokered);
        return new HttpStatusCodeResult(Response.StatusCode);
    }
}

这是完成繁重工作的代理类：

namespace MyProxy
{
    /// <summary>
    /// Asynchronous operation to proxy or "broker" a request via MVC
    /// </summary>
    internal class RequestBroker
    {
        /*
         * HttpWebRequest is a little protective, and if we do a straight copy of header information we will get ArgumentException for a set of 'restricted' 
         * headers which either can't be set or need to be set on other interfaces. This is a complete list of restricted headers.
         */
        private static readonly string[] RestrictedHeaders = new string[] { "Accept", "Connection", "Content-Length", "Content-Type", "Date", "Expect", "Host", "If-Modified-Since", "Range", "Referer", "Transfer-Encoding", "User-Agent", "Proxy-Connection" };

        internal class BrokerEventArgs : EventArgs
        {
            public DateTime StartTime { get; set; }

            public HttpWebResponse Response { get; set; }
        }

        public delegate void BrokerEventHandler(object sender, BrokerEventArgs e);

        public event BrokerEventHandler BrokerCompleted;

        public void BrokerAsync(HttpRequestBase requestToBroker, string redirectToUrl)
        {
            var httpRequest = BuildWebRequest(requestToBroker, redirectToUrl);

            var brokerTask = new Task(() => this.DoBroker(httpRequest));
            brokerTask.Start();
        }

        private void DoBroker(HttpWebRequest requestToBroker)
        {
            var startTime = DateTime.UtcNow;

            HttpWebResponse response;
            try
            {
                response = requestToBroker.GetResponse() as HttpWebResponse;
            }
            catch (WebException e)
            {
                Trace.TraceError("Broker Fail: " + e.ToString());

                response = e.Response as HttpWebResponse;
            }

            var args = new BrokerEventArgs()
            {
                StartTime = startTime,
                Response = response,
            };

            this.BrokerCompleted(this, args);
        }

        public static void BuildControllerResponse(HttpResponseBase httpResponseBase, HttpWebResponse brokeredResponse)
        {
            if (brokeredResponse == null)
            {
                PerfCounters.ErrorCounter.Increment();

                throw new GriddleException("Failed to broker a response. Refer to logs for details.");
            }

            httpResponseBase.Charset = brokeredResponse.CharacterSet;
            httpResponseBase.ContentType = brokeredResponse.ContentType;

            foreach (Cookie cookie in brokeredResponse.Cookies)
            {
                httpResponseBase.Cookies.Add(CookieToHttpCookie(cookie));
            }

            foreach (var header in brokeredResponse.Headers.AllKeys
                .Where(k => !k.Equals("Transfer-Encoding", StringComparison.InvariantCultureIgnoreCase)))
            {
                httpResponseBase.Headers.Add(header, brokeredResponse.Headers[header]);
            }

            httpResponseBase.StatusCode = (int)brokeredResponse.StatusCode;
            httpResponseBase.StatusDescription = brokeredResponse.StatusDescription;

            BridgeAndCloseStreams(brokeredResponse.GetResponseStream(), httpResponseBase.OutputStream);
        }

        private static HttpWebRequest BuildWebRequest(HttpRequestBase requestToBroker, string redirectToUrl)
        {
            var httpRequest = (HttpWebRequest)WebRequest.Create(redirectToUrl);

            if (requestToBroker.Headers != null)
            {
                foreach (var header in requestToBroker.Headers.AllKeys)
                {
                    if (RestrictedHeaders.Any(h => header.Equals(h, StringComparison.InvariantCultureIgnoreCase)))
                    {
                        continue;
                    }                   

                    httpRequest.Headers.Add(header, requestToBroker.Headers[header]);
                }
            }

            httpRequest.Accept = string.Join(",", requestToBroker.AcceptTypes);
            httpRequest.ContentType = requestToBroker.ContentType;
            httpRequest.Method = requestToBroker.HttpMethod;

            if (requestToBroker.UrlReferrer != null)
            {
                httpRequest.Referer = requestToBroker.UrlReferrer.AbsoluteUri;
            }

            httpRequest.UserAgent = requestToBroker.UserAgent;

            /* This is a performance change which I like.
             * If this is not explicitly set to null, the CLR will do a registry hit for each request to use the default proxy.
             */
            httpRequest.Proxy = null;

            if (requestToBroker.HttpMethod.Equals("POST", StringComparison.InvariantCultureIgnoreCase))
            {
                BridgeAndCloseStreams(requestToBroker.InputStream, httpRequest.GetRequestStream());
            }

            return httpRequest;
        }

        /// <summary>
        /// Convert System.Net.Cookie into System.Web.HttpCookie
        /// </summary>
        private static HttpCookie CookieToHttpCookie(Cookie cookie)
        {
            HttpCookie httpCookie = new HttpCookie(cookie.Name);

            foreach (string value in cookie.Value.Split('&'))
            {
                string[] val = value.Split('=');
                httpCookie.Values.Add(val[0], val[1]);
            }

            httpCookie.Domain = cookie.Domain;
            httpCookie.Expires = cookie.Expires;
            httpCookie.HttpOnly = cookie.HttpOnly;
            httpCookie.Path = cookie.Path;
            httpCookie.Secure = cookie.Secure;

            return httpCookie;
        }

        /// <summary>
        /// Reads from stream into the to stream
        /// </summary>
        private static void BridgeAndCloseStreams(Stream from, Stream to)
        {
            try
            {
                int read;
                do
                {
                    read = from.ReadByte();

                    if (read != -1)
                    {
                        to.WriteByte((byte)read);
                    }
                }
                while (read != -1);
            }
            finally 
            {
                from.Close();
                to.Close();
            }
        }
    }
}

Question 10

就像凯文所说的那样。

我正在使用静态方法来检索HttpContext.Current.Request，因此HttpRequest在需要时总是有一个要使用的对象。

在班级助手中

public static HttpRequest GetRequest()
{
    return HttpContext.Current.Request;
}

在控制器中

if (AcessoModel.UsuarioLogado(Helper.GetRequest()))

在这里看

bool bUserLogado = ProjectNamespace.Models.AcessoModel.UsuarioLogado(
                      ProjectNamespace.Models.Helper.GetRequest()
                   );

if (bUserLogado == false) { Response.Redirect("/"); }

我的方法UsuarioLogado

public static bool UsuarioLogado(HttpRequest Request)