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

   1 //
   2 // UrlRoutingModule.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.Threading;
  34 using System.Web;
  35
  36 namespace System.Web.Routing
  37 {
  38 #if NET_4_0
  39         [TypeForwardedFrom ("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
  40 #endif
  41         [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  42         [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  43         public class UrlRoutingModule : IHttpModule
  44         {
  45                 RouteCollection routes;
  46                 object module_identity_key = new object ();
  47                 object original_path_key = new object ();
  48
  49                 public RouteCollection RouteCollection {
  50                         get {
  51                                 if (routes == null)
  52                                         routes = RouteTable.Routes;
  53                                 return routes;
  54                         }
  55                         set { routes = value; }
  56                 }
  57
  58                 protected virtual void Dispose ()
  59                 {
  60                 }
  61
  62                 void IHttpModule.Dispose ()
  63                 {
  64                         Dispose ();
  65                 }
  66
  67                 void IHttpModule.Init (HttpApplication application)
  68                 {
  69                         Init (application);
  70                 }
  71
  72                 protected virtual void Init (HttpApplication application)
  73                 {
  74                         application.PostMapRequestHandler += PostMapRequestHandler;
  75                         application.PostResolveRequestCache += PostResolveRequestCache;
  76                 }
  77
  78                 void PostMapRequestHandler (object o, EventArgs e)
  79                 {
  80                         var app = (HttpApplication) o;
  81                         PostMapRequestHandler (new HttpContextWrapper (app.Context));
  82                 }
  83
  84                 void PostResolveRequestCache (object o, EventArgs e)
  85                 {
  86                         var app = (HttpApplication) o;
  87                         PostResolveRequestCache (new HttpContextWrapper (app.Context));
  88                 }
  89 #if NET_4_0
  90                 [Obsolete]
  91 #endif
  92                 public virtual void PostMapRequestHandler (HttpContextBase context)
  93                 {
  94 #if !NET_4_0
  95                         if (context == null)
  96                                 throw new ArgumentNullException ("context");
  97
  98                         // FIXME: find out what it actually does.
  99                         IHttpHandler h = (IHttpHandler) context.Items [module_identity_key];
 100                         if (h != null)
 101                                 context.Handler = h;
 102
 103                         string original_path = context.Items [original_path_key] as string;
 104                         if (!String.IsNullOrEmpty (original_path))
 105                                 context.RewritePath (original_path);
 106 #endif
 107                 }
 108
 109                 [MonoTODO]
 110                 public virtual void PostResolveRequestCache (HttpContextBase context)
 111                 {
 112                         if (context == null)
 113                                 throw new ArgumentNullException ("context");
 114
 115                         var rd = RouteCollection.GetRouteData (context);
 116                         if (rd == null)
 117                                 return; // do nothing
 118
 119                         if (rd.RouteHandler == null)
 120                                 throw new InvalidOperationException ("No  IRouteHandler is assigned to the selected route");
 121
 122                         if (rd.RouteHandler is StopRoutingHandler)
 123                                 return; //stop further processing
 124
 125                         var rc = new RequestContext (context, rd);
 126
 127                         IHttpHandler http = rd.RouteHandler.GetHttpHandler (rc);
 128                         if (http == null)
 129                                 throw new InvalidOperationException ("The mapped IRouteHandler did not return an IHttpHandler");
 130 #if NET_4_0
 131                         context.Request.RequestContext = rc;
 132                         context.RemapHandler (http);
 133 #else
 134                         // note: It does not resolve paths using GetVirtualPath():
 135                         //var vpd = RouteCollection.GetVirtualPath (rc, rd.Values);
 136                         //context.RewritePath (vpd.VirtualPath);
 137
 138                         context.Items [original_path_key] = context.Request.Path;
 139
 140                         // default handler (forbidden in MVC/DynamicData projects)
 141                         context.RewritePath ("~/UrlRouting.axd");
 142
 143                         context.Items [module_identity_key] = http;
 144 #endif
 145                 }
 146         }
 147 }