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                                         (handler is IHttpExtendedHandler ? (IHttpHandler) new ReadOnlySessionWrapperExtendedHandler ((IHttpExtendedHandler) handler) : new ReadOnlySessionWrapperHandler (handler)) :\r
  21                                         (handler is IHttpExtendedHandler ? new SessionWrapperExtendedHandler ((IHttpExtendedHandler) handler) : new SessionWrapperHandler (handler));\r
  22                         return handler;\r
  23                 }\r
  24 \r
  25                 #region SessionWrappers\r
  26 \r
  27                 class SessionWrapperHandler : IHttpHandler, IRequiresSessionState, IServiceProvider\r
  28                 {\r
  29                         protected readonly IHttpHandler _handler;\r
  30 \r
  31                         public SessionWrapperHandler (IHttpHandler handler) {\r
  32                                 _handler = handler;\r
  33                         }\r
  34 \r
  35                         public bool IsReusable {\r
  36                                 get { return _handler.IsReusable; }\r
  37                         }\r
  38 \r
  39                         public void ProcessRequest (HttpContext context) {\r
  40                                 _handler.ProcessRequest (context);\r
  41                         }\r
  42 \r
  43                         public object GetService (Type serviceType) {\r
  44                                 return ((IServiceProvider) _handler).GetService (serviceType);\r
  45                         }\r
  46                 }\r
  47 \r
  48                 sealed class ReadOnlySessionWrapperHandler : SessionWrapperHandler, IReadOnlySessionState\r
  49                 {\r
  50                         public ReadOnlySessionWrapperHandler (IHttpHandler handler) : base (handler) { }\r
  51                 }\r
  52 \r
  53                 #endregion\r
  54 \r
  55                 #region ExtendedSessionWrappers\r
  56 \r
  57                 class SessionWrapperExtendedHandler : SessionWrapperHandler, IHttpExtendedHandler\r
  58                 {\r
  59                         public SessionWrapperExtendedHandler (IHttpExtendedHandler handler)\r
  60                                 : base (handler) {\r
  61                         }\r
  62 \r
  63                         public bool IsCompleted {\r
  64                                 get { return ((IHttpExtendedHandler) _handler).IsCompleted; }\r
  65                         }\r
  66                 }\r
  67 \r
  68                 sealed class ReadOnlySessionWrapperExtendedHandler : SessionWrapperExtendedHandler, IReadOnlySessionState\r
  69                 {\r
  70                         public ReadOnlySessionWrapperExtendedHandler (IHttpExtendedHandler handler) : base (handler) { }\r
  71                 }\r
  72 \r
  73                 #endregion\r
  74         }\r
  75 }\r