mcs/class/System.Net/System.Net.Policy/BaseDomainPolicy.cs

   1 //
   2 // BaseDomainPolicy.cs
   3 //
   4 // Authors:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //      Moonlight List (moonlight-list@lists.ximian.com)
   7 //
   8 // Copyright (C) 2009-2010 Novell, Inc.  http://www.novell.com
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 #if MOBILE
  31
  32 using System;
  33 using System.Collections.Generic;
  34 using System.IO;
  35 using System.Linq;
  36
  37 // Base class for shared stuff between the Silverlight and Flash policies
  38 // e.g. Headers and Domain comparison
  39
  40 namespace System.Net.Policy {
  41
  42         abstract class BaseDomainPolicy : ICrossDomainPolicy {
  43
  44                 static string root;
  45                 static Uri app;
  46 #if !TEST
  47                 static BaseDomainPolicy ()
  48                 {
  49                         ApplicationUri = new Uri (AppDomain.CurrentDomain.GetData ("xap_uri") as string);
  50                 }
  51 #endif
  52                 static public Uri ApplicationUri {
  53                         get { return app; }
  54                         set {
  55                                 app = value;
  56                                 root = null;
  57                         }
  58                 }
  59
  60                 static public string ApplicationRoot {
  61                         get {
  62                                 if (root == null)
  63                                         root = CrossDomainPolicyManager.GetRoot (ApplicationUri);
  64                                 return root;
  65                         }
  66                 }
  67
  68                 public class Headers {
  69
  70                         sealed class PrefixComparer : IEqualityComparer<string> {
  71
  72                                 public bool Equals (string x, string y)
  73                                 {
  74                                         int check_length = x.Length - 1;
  75                                         if ((x.Length > 0) && (x [check_length] == '*'))
  76                                                 return (String.Compare (x, 0, y, 0, check_length, StringComparison.OrdinalIgnoreCase) == 0);
  77
  78                                         return (String.Compare (x, y, StringComparison.OrdinalIgnoreCase) == 0);
  79                                 }
  80
  81                                 public int GetHashCode (string obj)
  82                                 {
  83                                         return (obj == null) ? 0 : obj.GetHashCode ();
  84                                 }
  85                         }
  86
  87                         static PrefixComparer pc = new PrefixComparer ();
  88
  89                         private List<string> list;
  90
  91                         public Headers ()
  92                         {
  93                         }
  94
  95                         public bool AllowAllHeaders { get; private set; }
  96
  97                         public bool IsAllowed (string[] headers)
  98                         {
  99                                 if (AllowAllHeaders)
 100                                         return true;
 101
 102                                 if (headers == null || headers.Length == 0)
 103                                         return true;
 104
 105                                 return headers.All (s => list.Contains (s, pc));
 106                         }
 107
 108                         public void SetHeaders (string raw)
 109                         {
 110                                 if (raw == "*") {
 111                                         AllowAllHeaders = true;
 112                                         list = null;
 113                                 } else if (raw != null) {
 114                                         string [] headers = raw.Split (',');
 115                                         list = new List<string> (headers.Length + 1);
 116                                         list.Add ("Content-Type");
 117                                         for (int i = 0; i < headers.Length; i++) {
 118                                                 string s = headers [i].Trim ();
 119                                                 if (!String.IsNullOrEmpty (s))
 120                                                         list.Add (s);
 121                                         }
 122                                 } else {
 123                                         // without a specified 'http-request-headers' no header, expect Content-Type, is allowed
 124                                         AllowAllHeaders = false;
 125                                         list = new List<string> (1);
 126                                         list.Add ("Content-Type");
 127                                 }
 128                         }
 129                 }
 130
 131                 abstract public bool IsAllowed (WebRequest request);
 132
 133                 public Exception Exception {
 134                         get; internal set;
 135                 }
 136         }
 137 }
 138
 139 #endif
 140