Application_BeginRequest用法

Question

我們正在嘗試ASP.NET MVC項目中的一些登錄操作。我們的目標是：「如果用戶的IP是不是從我們的內部網，他/她重定向到登錄頁面。否則，只要到我們的索引頁面，我們寫了一些代碼，但我們是在一個循環中

GLOBAL。。 ASAX

protected void Application_BeginRequest(object sender, EventArgs e) 
    { 
     var request = ((System.Web.HttpApplication) sender).Request; 

     string ip1 = request.UserHostAddress; 
     string shortLocalIP; 
     if (ip1 != null && ip1.Contains(".")) 
     { 
      string[] ipValues = ip1.Split('.'); 
      shortLocalIP = ipValues[0] +"."+ipValues[1]; 
     } 
     else 
     { 
      shortLocalIP = "192.168"; 
     } 

     //var ip2 = request.ServerVariables["LOCAL_ADDR"]; 
     //var ip3 = request.ServerVariables["SERVER_ADDR"]; 

     if (shortLocalIP != LOCALIP) 
     { 
      if ("/Login/User".Equals(request.RawUrl, StringComparison.InvariantCultureIgnoreCase)) 
      {     
        return;         
      } 

      Response.Clear();    
      Response.Redirect("/Login/User");    
      Response.End();  
     } 
    } 

登錄控制器

public class LoginController : Controller 
{ 
    // GET: Login 
    public ActionResult User() 
    {   
     return View(); 
    } 

    public ActionResult checkAuthentication(FormCollection collection) 
    { 
     bool isAuthenticated = new LdapServiceManager().isAuthenticated(collection); 
     if (isAuthenticated) 
     { 
      Response.Redirect("Home/Index"); 
     } 
     else 
     { 
      Response.Redirect("/Login/User"); 
     } 
     return null; 
    } 
} 

LOGIN CSHTML

<form class="login-form" action="/Login/checkAuthentication" method="post" novalidate="novalidate"> 

當我們按下某個按鈕或其他東西時，Application_BeginRequest會每次觸發。但是我們只是在開始時才需要這些操作。謝謝...

我們應該在GLOBAL.ASAX中使用SESSION START嗎？

Answer 1

您可以使用ActionFilter這一點。創建自定義過濾器類，像這樣 -

public class IntranetAction : ActionFilterAttribute 
{ 
    public override void OnActionExecuting(ActionExecutingContext filterContext) 
    { 
     bool isIPAddressValid = false;//TODO: Check the IP validity here 
     if (isIPAddressValid) 
     { 
      filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary(new 
      { 
       controller = "Account", //TODO - Edit as per you controller 
       action = "Login"  //and Action 
      })); 
     } 

     base.OnActionExecuting(filterContext); 
    } 
} 

，簡單地用它在你的控制器ActionMethod像這樣的例子 -

[IntranetAction] 
    public ActionResult Index() 
    { 
     return View(); 
    } 

Suugest要經過好文章開始使用定製過濾器 - http://www.asp.net/mvc/overview/older-versions-1/controllers-and-routing/understanding-action-filters-cs

Answer 2

Application_BeginRequest將在每次向服務器發出的請求中調用。如果您只想在某些動作上執行某些邏輯，請使用ActionFilters

Answer 3

您可以使用ActionFilter for MVC。這是操作的示例代碼。

public class IpControlAttribute : ActionFilterAttribute { 
    private const string LOCALIP = ""; 

    public override void OnActionExecuting(ActionExecutingContext filterContext) { 
     var request = filterContext.RequestContext.HttpContext.Request; 

     string ip1 = request.UserHostAddress; 
     string shortLocalIP; 
     if (ip1 != null && ip1.Contains(".")) { 
      string[] ipValues = ip1.Split('.'); 
      shortLocalIP = ipValues[0] + "." + ipValues[1]; 
     } else { 
      shortLocalIP = "192.168"; 
     } 

     //var ip2 = request.ServerVariables["LOCAL_ADDR"]; 
     //var ip3 = request.ServerVariables["SERVER_ADDR"]; 

     if (shortLocalIP != LOCALIP) { 
      if ("/Login/User".Equals(request.RawUrl, StringComparison.InvariantCultureIgnoreCase)) { 
       return; 
      } 

      filterContext.Result = new RedirectResult("/Account/Login"); 
     } 
    } 
} 

然後，您需要將其添加爲全局篩選器在FilterConfig.cs

filters.Add(new IpCheckAttribute());