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.Security.Permissions;
  32 using System.Web;
  33
  34 namespace System.Web.Routing
  35 {
  36         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  37         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  38         public abstract class UrlRoutingHandler : IHttpHandler
  39         {
  40                 RouteCollection routes;
  41
  42                 bool IHttpHandler.IsReusable {
  43                         get { return IsReusable; }
  44                 }
  45
  46                 protected virtual bool IsReusable { get { return false; } }
  47
  48                 public RouteCollection RouteCollection {
  49                         get {
  50                                 if (routes == null)
  51                                         routes = RouteTable.Routes;
  52                                 return routes;
  53                         }
  54                         set { routes = value; }
  55                 }
  56
  57                 void IHttpHandler.ProcessRequest (HttpContext context)
  58                 {
  59                         ProcessRequest (context);
  60                 }
  61
  62                 protected virtual void ProcessRequest (HttpContext httpContext)
  63                 {
  64                         ProcessRequest (new HttpContextWrapper (httpContext));
  65                 }
  66
  67                 protected virtual void ProcessRequest (HttpContextBase httpContext)
  68                 {
  69                         if (httpContext == null)
  70                                 throw new ArgumentNullException ("httpContext");
  71
  72                         var rd = RouteCollection.GetRouteData (httpContext);
  73                         if (rd == null)
  74                                 throw new HttpException ("The incoming request does not match any route");
  75                         if (rd.RouteHandler == null)
  76                                 throw new InvalidOperationException ("No  IRouteHandler is assigned to the selected route");
  77
  78                         RequestContext rc = new RequestContext (httpContext, rd);
  79
  80                         var hh = rd.RouteHandler.GetHttpHandler (rc);
  81                         VerifyAndProcessRequest (hh, httpContext);
  82                 }
  83
  84                 protected abstract void VerifyAndProcessRequest (IHttpHandler httpHandler, HttpContextBase httpContext);
  85         }
  86 }