在我的ASP.NET MVC控制器中，我有一个需要HttpRequest对象的方法。我有权访问的是HttpRequestBase对象。
无论如何我可以以某种方式转换这个？
我能做什么/应该做什么？
答案 0 :(得分：62)
你应该总是在你的应用程序中使用HttpRequestBase和HttpResponseBase作为与不可能测试的具体版本相关的（没有typemock或其他魔法）。
只需使用HttpRequestWrapper类进行转换，如下所示。
var httpRequestBase = new HttpRequestWrapper(Context.Request);
答案 1 :(得分：46)
这是你的方法，所以你可以重写它以取HttpRequestBase吗？如果没有，您可以始终从HttpRequest获取当前HttpContext.Current.HttpRequest以继续传递。但是，我经常在ASP.NET: Removing System.Web Dependencies中提到的类中包装对HttpContext的访问，以获得更好的单元测试支持。
答案 2 :(得分：27)
你可以使用
System.Web.HttpContext.Current.Request
这里的关键是你需要完整的命名空间才能获得“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的话，那就去吧！
（编辑：我看到Kevin Hakanson已经给出了这个答案......所以希望我的回复能帮助那些只是阅读答案而不是评论的人。）:)）
答案 3 :(得分：9)
尝试使用HttpRequestBase使用/创建HttpRequestWrapper。
答案 4 :(得分：7)
要在ASP.NET MVC4 .NET 4.5中获取HttpRequest，您可以执行以下操作：
this.HttpContext.ApplicationInstance.Context.Request
答案 5 :(得分：4)
通常，当您需要在控制器操作中访问HttpContext属性时，您可以更好地设计。
例如，如果您需要访问当前用户，请为您的操作方法提供类型为IPrincipal的参数，您可以使用Attribute填充该参数并在测试时按照您的意愿进行模拟。有关方法的小例子，请参阅this blog post，特别是第7点。
答案 6 :(得分：2)
无法在这些类型之间进行转换。
我们有类似的案例。我们重写了我们的类/ 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）。通过自制模拟，它们更容易处理。
我很抱歉你做不到。
答案 7 :(得分：2)
这是一个接受请求的ASP.Net MVC 3.0 AsyncController，将入站HttpRequestBase MVC对象转换为System.Web.HttpWebRequest。然后它以异步方式发送请求。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，我猜你只对BuildWebRequest（）函数感兴趣。但是，它演示了如何在整个管道中移动 - 从BaseRequest转换为＆gt;请求然后回复＆gt; BaseResponse。我认为分享两者都很有用。
通过这些类，您可以拥有一个充当Web代理的MVC服务器。
希望这有帮助！
<强>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);
}
}
这是繁重的代理类：
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();
}
}
}
}
答案 8 :(得分：1)
就像凯文说的那样。
我正在使用静态方法来检索HttpContext.Current.Request，因此在需要时总是有一个HttpRequest对象。
public static HttpRequest GetRequest()
{
return HttpContext.Current.Request;
}
if (AcessoModel.UsuarioLogado(Helper.GetRequest()))
bool bUserLogado = ProjectNamespace.Models.AcessoModel.UsuarioLogado(
ProjectNamespace.Models.Helper.GetRequest()
);
if (bUserLogado == false) { Response.Redirect("/"); }
public static bool UsuarioLogado(HttpRequest Request)