mcs/class/System.Web.Routing/System.Web.Routing/UrlRoutingHandler.cs

   1 //
   2 // UrlRoutingHandler.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2008 Novell Inc. http://novell.com
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30 using System;
  31 using System.Runtime.CompilerServices;
  32 using System.Security.Permissions;
  33 using System.Web;
  34
  35 namespace System.Web.Routing
  36 {
  37 #if NET_4_0
  38         [TypeForwardedFrom ("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
  39 #endif
  40         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  41         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  42         public abstract class UrlRoutingHandler : IHttpHandler
  43         {
  44                 RouteCollection routes;
  45
  46                 bool IHttpHandler.IsReusable {
  47                         get { return IsReusable; }
  48                 }
  49
  50                 protected virtual bool IsReusable { get { return false; } }
  51
  52                 public RouteCollection RouteCollection {
  53                         get {
  54                                 if (routes == null)
  55                                         routes = RouteTable.Routes;
  56                                 return routes;
  57                         }
  58                         set { routes = value; }
  59                 }
  60
  61                 void IHttpHandler.ProcessRequest (HttpContext context)
  62                 {
  63                         ProcessRequest (context);
  64                 }
  65
  66                 protected virtual void ProcessRequest (HttpContext httpContext)
  67                 {
  68                         ProcessRequest (new HttpContextWrapper (httpContext));
  69                 }
  70
  71                 protected virtual void ProcessRequest (HttpContextBase httpContext)
  72                 {
  73                         if (httpContext == null)
  74                                 throw new ArgumentNullException ("httpContext");
  75
  76                         var rd = RouteCollection.GetRouteData (httpContext);
  77                         if (rd == null)
  78                                 throw new HttpException ("The incoming request does not match any route");
  79                         if (rd.RouteHandler == null)
  80                                 throw new InvalidOperationException ("No  IRouteHandler is assigned to the selected route");
  81
  82                         RequestContext rc = new RequestContext (httpContext, rd);
  83
  84                         var hh = rd.RouteHandler.GetHttpHandler (rc);
  85                         VerifyAndProcessRequest (hh, httpContext);
  86                 }
  87
  88                 protected abstract void VerifyAndProcessRequest (IHttpHandler httpHandler, HttpContextBase httpContext);
  89         }
  90 }