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 using System;
  13 using System.IO;
  14 using System.Collections;
  15 using System.Web.Caching;
  16
  17 namespace System.Web.SessionState
  18 {
  19         class SessionInProcHandler : ISessionHandler
  20         {
  21                 SessionConfig config;
  22                 CacheItemRemovedCallback removedCB;
  23
  24                 public void Dispose () { }
  25
  26                 public void Init (SessionStateModule module, HttpApplication context, SessionConfig config)
  27                 {
  28                         removedCB = new CacheItemRemovedCallback (module.OnSessionRemoved);
  29                         this.config = config;
  30                 }
  31
  32                 public void UpdateHandler (HttpContext context, SessionStateModule module) { }
  33
  34                 public HttpSessionState UpdateContext (HttpContext context, SessionStateModule module,
  35                                                         bool required, bool read_only, ref bool isNew)
  36                 {
  37                         if (!required)
  38                                 return null;
  39
  40                         Cache cache = HttpRuntime.Cache;
  41                         HttpSessionState state = null;
  42                         string id = SessionId.Lookup (context.Request, config.CookieLess);
  43
  44                         if (id != null) {
  45                                 state = (HttpSessionState) cache ["@@@InProc@" + id];
  46                                 if (state != null)
  47                                         return state;
  48                         }
  49
  50                         // Create a new session.
  51                         string sessionID = SessionId.Create (module.Rng);
  52                         state = new HttpSessionState (sessionID, // unique identifier
  53                                                 new SessionDictionary(), // dictionary
  54                                                 HttpApplicationFactory.ApplicationState.SessionObjects,
  55                                                 config.Timeout, //lifetime before death.
  56                                                 true, //new session
  57                                                 false, // is cookieless
  58                                                 SessionStateMode.InProc,
  59                                                 read_only); //readonly
  60
  61                         TimeSpan timeout = new TimeSpan (0, config.Timeout, 0);
  62                         cache.Insert ("@@@InProc@" + sessionID, state, null, DateTime.Now + timeout,
  63                                         timeout, CacheItemPriority.AboveNormal, removedCB);
  64
  65                         isNew = true;
  66                         return state;
  67                 }
  68         }
  69 }
  70