mcs/class/System.Web/System.Web.SessionState/SessionInProcHandler.cs

   1 //
   2 // System.Web.SessionState.SessionInProcHandler
   3 //
   4 // Authors:
   5 //      Stefan Görling (stefan@gorling.se)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //
   8 // (C) 2003 Stefan Görling
   9 // Copyright (c) 2004 Novell, Inc. (http://www.novell.com)
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.IO;
  35 using System.Collections;
  36 using System.Web.Caching;
  37
  38 namespace System.Web.SessionState
  39 {
  40         class SessionInProcHandler : ISessionHandler
  41         {
  42                 SessionConfig config;
  43                 CacheItemRemovedCallback removedCB;
  44
  45                 public void Dispose () { }
  46
  47                 public void Init (SessionStateModule module, HttpApplication context, SessionConfig config)
  48                 {
  49                         removedCB = new CacheItemRemovedCallback (module.OnSessionRemoved);
  50                         this.config = config;
  51                 }
  52
  53                 public void UpdateHandler (HttpContext context, SessionStateModule module) { }
  54
  55                 public HttpSessionState UpdateContext (HttpContext context, SessionStateModule module,
  56                                                         bool required, bool read_only, ref bool isNew)
  57                 {
  58                         if (!required)
  59                                 return null;
  60
  61                         Cache cache = HttpRuntime.Cache;
  62                         HttpSessionState state = null;
  63                         string id = SessionId.Lookup (context.Request, config.CookieLess);
  64
  65                         if (id != null) {
  66                                 state = (HttpSessionState) cache ["@@@InProc@" + id];
  67                                 if (state != null)
  68                                         return state;
  69                         }
  70
  71                         // Create a new session.
  72                         string sessionID = SessionId.Create (module.Rng);
  73                         state = new HttpSessionState (sessionID, // unique identifier
  74                                                 new SessionDictionary(), // dictionary
  75                                                 HttpApplicationFactory.ApplicationState.SessionObjects,
  76                                                 config.Timeout, //lifetime before death.
  77                                                 true, //new session
  78                                                 false, // is cookieless
  79                                                 SessionStateMode.InProc,
  80                                                 read_only); //readonly
  81
  82                         TimeSpan timeout = new TimeSpan (0, config.Timeout, 0);
  83                         cache.Insert ("@@@InProc@" + sessionID, state, null, DateTime.Now + timeout,
  84                                         timeout, CacheItemPriority.AboveNormal, removedCB);
  85
  86                         isNew = true;
  87                         return state;
  88                 }
  89         }
  90 }
  91