mcs/class/System.Web/System.Web.Security/AnonymousIdentificationModule.cs

   1 //
   2 // System.Web.Security.AnonymousIdentificationModule
   3 //
   4 // Authors:
   5 //      Ben Maurer (bmaurer@users.sourceforge.net)
   6 //      Chris Toshok (toshok@ximian.com)
   7 //
   8 // (C) 2003 Ben Maurer
   9 // Copyright (c) 2005 Novell, Inc (http://www.novell.com)
  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
  31 #if NET_2_0
  32
  33 using System.Web;
  34 using System.Web.Configuration;
  35
  36 namespace System.Web.Security {
  37
  38         public sealed class AnonymousIdentificationModule : IHttpModule {
  39
  40                 public event AnonymousIdentificationEventHandler Creating;
  41
  42                 public static void ClearAnonymousIdentifier ()
  43                 {
  44                         HttpContext c = HttpContext.Current;
  45                         SystemWebSectionGroup g = (SystemWebSectionGroup)WebConfigurationManager.GetSection ("system.web");
  46
  47                         if (!g.AnonymousIdentification.Enabled
  48                             || false /* XXX The user for the current request is anonymous */)
  49                                 throw new NotSupportedException ();
  50                 }
  51
  52                 public void Dispose ()
  53                 {
  54                         app.PostAuthenticateRequest -= OnEnter;
  55                         app = null;
  56                 }
  57
  58                 public void Init (HttpApplication app)
  59                 {
  60                         this.app = app;
  61                         app.PostAuthenticateRequest += OnEnter;
  62                 }
  63
  64                 void OnEnter (object source, EventArgs eventArgs)
  65                 {
  66                         if (!Enabled)
  67                                 return;
  68
  69                         string anonymousID = null;
  70
  71                         if (Creating != null) {
  72                                 AnonymousIdentificationEventArgs e = new AnonymousIdentificationEventArgs (HttpContext.Current);
  73                                 Creating (this, e);
  74
  75                                 anonymousID = e.AnonymousID;
  76                         }
  77
  78                         if (anonymousID == null)
  79                                 anonymousID = Guid.NewGuid().ToString();
  80
  81                         app.Request.AnonymousID = anonymousID;
  82                 }
  83
  84                 public static bool Enabled {
  85                         get {
  86                                 SystemWebSectionGroup g = (SystemWebSectionGroup)WebConfigurationManager.GetSection ("system.web");
  87                                 return g.AnonymousIdentification.Enabled;
  88                         }
  89                 }
  90
  91                 HttpApplication app;
  92         }
  93 }
  94 #endif
  95