mcs/class/Mainsoft.Web/Mainsoft.Web.Hosting/SessionWrapper.cs

   1 using System;\r
   2 using System.Collections.Generic;\r
   3 using System.Text;\r
   4 using System.Web;\r
   5 using System.Web.J2EE;\r
   6 using System.Web.SessionState;\r
   7 \r
   8 namespace Mainsoft.Web.Hosting\r
   9 {\r
  10         public static class SessionWrapper\r
  11         {\r
  12                 static readonly Type IRequiresSessionStateType = typeof (IRequiresSessionState);\r
  13                 static readonly Type IReadOnlySessionStateType = typeof (IReadOnlySessionState);\r
  14 \r
  15                 public static IHttpHandler WrapHandler (IHttpHandler handler) {\r
  16                         Type type = (Type) ((IServiceProvider) handler).GetService (typeof (Type));\r
  17 \r
  18                         if (IRequiresSessionStateType.IsAssignableFrom (type))\r
  19                                 return IReadOnlySessionStateType.IsAssignableFrom (type) ?\r
  20                                         new ReadOnlySessionWrapperHandler (handler) : new SessionWrapperHandler (handler);\r
  21                         return handler;\r
  22                 }\r
  23                 public static IHttpHandler WrapHandler (IHttpExtendedHandler handler) {\r
  24                         Type type = (Type) ((IServiceProvider) handler).GetService (typeof (Type));\r
  25 \r
  26                         if (IRequiresSessionStateType.IsAssignableFrom (type))\r
  27                                 return IReadOnlySessionStateType.IsAssignableFrom (type) ?\r
  28                                         new ReadOnlySessionWrapperExtendedHandler (handler) : new SessionWrapperExtendedHandler (handler);\r
  29                         return handler;\r
  30                 }\r
  31 \r
  32                 #region SessionWrappers\r
  33 \r
  34                 class SessionWrapperHandler : IHttpHandler, IRequiresSessionState, IServiceProvider\r
  35                 {\r
  36                         protected readonly IHttpHandler _handler;\r
  37 \r
  38                         public SessionWrapperHandler (IHttpHandler handler) {\r
  39                                 _handler = handler;\r
  40                         }\r
  41 \r
  42                         public bool IsReusable {\r
  43                                 get { return _handler.IsReusable; }\r
  44                         }\r
  45 \r
  46                         public void ProcessRequest (HttpContext context) {\r
  47                                 _handler.ProcessRequest (context);\r
  48                         }\r
  49 \r
  50                         public object GetService (Type serviceType) {\r
  51                                 return ((IServiceProvider) _handler).GetService (serviceType);\r
  52                         }\r
  53                 }\r
  54 \r
  55                 sealed class ReadOnlySessionWrapperHandler : SessionWrapperHandler, IReadOnlySessionState\r
  56                 {\r
  57                         public ReadOnlySessionWrapperHandler (IHttpHandler handler) : base (handler) { }\r
  58                 }\r
  59 \r
  60                 #endregion\r
  61 \r
  62                 #region ExtendedSessionWrappers\r
  63 \r
  64                 class SessionWrapperExtendedHandler : SessionWrapperHandler, IHttpExtendedHandler\r
  65                 {\r
  66                         public SessionWrapperExtendedHandler (IHttpExtendedHandler handler)\r
  67                                 : base (handler) {\r
  68                         }\r
  69 \r
  70                         public bool IsCompleted {\r
  71                                 get { return ((IHttpExtendedHandler) _handler).IsCompleted; }\r
  72                         }\r
  73                 }\r
  74 \r
  75                 sealed class ReadOnlySessionWrapperExtendedHandler : SessionWrapperExtendedHandler, IReadOnlySessionState\r
  76                 {\r
  77                         public ReadOnlySessionWrapperExtendedHandler (IHttpExtendedHandler handler) : base (handler) { }\r
  78                 }\r
  79 \r
  80                 #endregion\r
  81         }\r
  82 }\r