mcs/class/System.Web/System.Web/VirtualPath.cs

   1 //
   2 // System.Web.VirtualPath.cs
   3 //
   4 // Authors:
   5 //   Marek Habersack (mhabersack@novell.com)
   6 //
   7 // (C) 2008 Novell, Inc
   8 //
   9
  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 #if NET_2_0
  31 using System.Web.Util;
  32
  33 namespace System.Web
  34 {
  35         internal class VirtualPath : IDisposable
  36         {
  37                 string _absolute;
  38                 string _appRelative;
  39                 string _appRelativeNotRooted;
  40                 string _extension;
  41                 string _directory;
  42                 string _currentRequestDirectory;
  43
  44                 public bool IsAbsolute {
  45                         get;
  46                         private set;
  47                 }
  48
  49                 public bool IsRooted {
  50                         get;
  51                         private set;
  52                 }
  53
  54                 public bool IsAppRelative {
  55                         get;
  56                         private set;
  57                 }
  58
  59                 public string Original {
  60                         get;
  61                         private set;
  62                 }
  63
  64                 public string Absolute {
  65                         get {
  66                                 if (IsAbsolute)
  67                                         return Original;
  68
  69                                 if (_absolute == null) {
  70                                         string original = Original;
  71
  72                                         if (!VirtualPathUtility.IsRooted (original))
  73                                                 _absolute = MakeRooted (original);
  74                                         else
  75                                                 _absolute = original;
  76
  77                                         if (VirtualPathUtility.IsAppRelative (_absolute))
  78                                                 _absolute = VirtualPathUtility.ToAbsolute (_absolute);
  79                                 }
  80
  81                                 return _absolute;
  82                         }
  83                 }
  84
  85                 public string AppRelative {
  86                         get {
  87                                 if (IsAppRelative)
  88                                         return Original;
  89
  90                                 if (_appRelative == null) {
  91                                         string original = Original;
  92
  93                                         if (!VirtualPathUtility.IsRooted (original))
  94                                                 _appRelative = MakeRooted (original);
  95                                         else
  96                                                 _appRelative = original;
  97
  98                                         if (VirtualPathUtility.IsAbsolute (_appRelative))
  99                                                 _appRelative = VirtualPathUtility.ToAppRelative (_appRelative);
 100                                 }
 101
 102                                 return _appRelative;
 103                         }
 104                 }
 105
 106                 public string AppRelativeNotRooted {
 107                         get {
 108                                 if (_appRelativeNotRooted == null)
 109                                         _appRelativeNotRooted = AppRelative.Substring (2);
 110
 111                                 return _appRelativeNotRooted;
 112                         }
 113                 }
 114
 115                 public string Extension {
 116                         get {
 117                                 if (_extension == null)
 118                                         _extension = VirtualPathUtility.GetExtension (Original);
 119
 120                                 return _extension;
 121                         }
 122                 }
 123
 124                 public string Directory {
 125                         get {
 126                                 if (_directory == null)
 127                                         _directory = VirtualPathUtility.GetDirectory (Absolute);
 128
 129                                 return _directory;
 130                         }
 131                 }
 132
 133                 public string CurrentRequestDirectory {
 134                         get {
 135                                 if (_currentRequestDirectory != null)
 136                                         return _currentRequestDirectory;
 137
 138                                 HttpContext ctx = HttpContext.Current;
 139                                 HttpRequest req = ctx != null ? ctx.Request : null;
 140                                 if (req != null)
 141                                         return VirtualPathUtility.GetDirectory (req.CurrentExecutionFilePath);
 142
 143                                 return null;
 144                         }
 145
 146                         set { _currentRequestDirectory = value; }
 147                 }
 148
 149                 public VirtualPath (string vpath)
 150                 {
 151                         Original = vpath;
 152
 153                         IsRooted = VirtualPathUtility.IsRooted (vpath);
 154                         IsAbsolute = VirtualPathUtility.IsAbsolute (vpath);
 155                         IsAppRelative = VirtualPathUtility.IsAppRelative (vpath);
 156                 }
 157
 158                 public VirtualPath (string vpath, string baseVirtualDir)
 159                         : this (vpath)
 160                 {
 161                         CurrentRequestDirectory = baseVirtualDir;
 162                 }
 163
 164                 public bool StartsWith (string s)
 165                 {
 166                         return StrUtils.StartsWith (Original, s);
 167                 }
 168
 169                 // Assumes 'original' is NOT rooted
 170                 string MakeRooted (string original)
 171                 {
 172                         string reqdir = CurrentRequestDirectory;
 173
 174                         if (!String.IsNullOrEmpty (reqdir))
 175                                 return VirtualPathUtility.Combine (reqdir, original);
 176                         else
 177                                 return VirtualPathUtility.Combine (HttpRuntime.AppDomainAppVirtualPath, original);
 178                 }
 179
 180                 public void Dispose ()
 181                 {
 182                         _absolute = null;
 183                         _appRelative = null;
 184                         _appRelativeNotRooted = null;
 185                         _extension = null;
 186                         _directory = null;
 187                 }
 188
 189                 public override string ToString ()
 190                 {
 191                         return Original;
 192                 }
 193
 194                 public static VirtualPath PhysicalToVirtual (string physical_path)
 195                 {
 196                         if (String.IsNullOrEmpty (physical_path))
 197                                 return null;
 198
 199                         string appPhysicalPath = HttpRuntime.AppDomainAppPath;
 200                         if (!StrUtils.StartsWith (physical_path, appPhysicalPath))
 201                                 return null;
 202
 203                         string vp = physical_path.Substring (appPhysicalPath.Length - 1);
 204                         if (vp [0] != '/')
 205                                 return null;
 206
 207                         return new VirtualPath (vp);
 208                 }
 209         }
 210 }
 211 #endif