mcs/class/System.XML/System.Xml/XmlResolver.cs

   1 //\r
   2 // System.Xml.XmlResolver.cs\r
   3 //\r
   4 // Author:\r
   5 //   Jason Diamond (jason@injektilo.org)\r
   6 //   Atsushi Enomoto (atsushi@ximian.com)\r
   7 //\r
   8 // (C) 2001 Jason Diamond  http://injektilo.org/\r
   9 // (C) 2004 Novell Inc.\r
  10 //\r
  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 \r
  33 using System;\r
  34 using System.IO;\r
  35 using System.Net;\r
  36 \r
  37 namespace System.Xml\r
  38 {\r
  39         public abstract class XmlResolver\r
  40         {\r
  41 #if NET_2_0\r
  42                 public virtual XmlNameTable NameTable {\r
  43                         get { return null; }\r
  44                 }\r
  45 #endif\r
  46 \r
  47                 public abstract ICredentials Credentials { set; }\r
  48 \r
  49                 public abstract object GetEntity (\r
  50                         Uri absoluteUri,\r
  51                         string role,\r
  52                         Type type);\r
  53 \r
  54 \r
  55                 public virtual Uri ResolveUri (Uri baseUri, string relativeUri)\r
  56                 {\r
  57                         if (baseUri == null) {\r
  58                                 if (relativeUri == null)\r
  59                                         throw new ArgumentException ("Either baseUri or relativeUri are required.");\r
  60                                 // Don't ignore such case that relativeUri is in fact absolute uri (e.g. ResolveUri (null, "http://foo.com")).\r
  61                                 if (relativeUri.StartsWith ("http:") ||\r
  62                                         relativeUri.StartsWith ("https:") ||\r
  63                                         relativeUri.StartsWith ("file:"))\r
  64                                         return new Uri (relativeUri);\r
  65                                 else\r
  66                                         // extraneous "/a" is required because current Uri stuff \r
  67                                         // seems ignorant of difference between "." and "./". \r
  68                                         // I'd be appleciate if it is fixed with better solution.\r
  69                                         return new Uri (Path.GetFullPath (relativeUri));\r
  70 //                                      return new Uri (new Uri (Path.GetFullPath ("./a")), EscapeRelativeUriBody (relativeUri));\r
  71                         }\r
  72 \r
  73                         if (relativeUri == null)\r
  74                                 return baseUri;\r
  75 \r
  76                         return new Uri (baseUri, EscapeRelativeUriBody (relativeUri));\r
  77                 }\r
  78 \r
  79                 // see also XmlUrlResolver.UnescapeRelativeUriBody().\r
  80                 private string EscapeRelativeUriBody (string src)\r
  81                 {\r
  82                         return src.Replace ("<", "%3C")\r
  83                                 .Replace (">", "%3E")\r
  84                                 .Replace ("#", "%23")\r
  85                                 .Replace ("%", "%25")\r
  86                                 .Replace ("\"", "%22");\r
  87                 }\r
  88         }\r
  89 }\r