mcs/class/referencesource/mscorlib/system/security/policy/site.cs

   1 // ==++==
   2 //
   3 //   Copyright (c) Microsoft Corporation.  All rights reserved.
   4 //
   5 // ==--==
   6 // <OWNER>[....]</OWNER>
   7 //
   8
   9 //
  10 //  Site.cs
  11 //
  12 //  Site is an IIdentity representing internet sites.
  13 //
  14
  15 using System;
  16 using System.Diagnostics.Contracts;
  17 using System.Globalization;
  18 using System.Security.Permissions;
  19 using System.Security.Util;
  20
  21 namespace System.Security.Policy
  22 {
  23     [Serializable]
  24     [System.Runtime.InteropServices.ComVisible(true)]
  25     public sealed class Site : EvidenceBase, IIdentityPermissionFactory
  26     {
  27         private SiteString m_name;
  28
  29         public Site(String name)
  30         {
  31             if (name == null)
  32                 throw new ArgumentNullException("name");
  33             Contract.EndContractBlock();
  34
  35             m_name = new SiteString( name );
  36         }
  37
  38         private Site(SiteString name)
  39         {
  40             Contract.Assert(name != null);
  41             m_name = name;
  42         }
  43
  44         public static Site CreateFromUrl( String url )
  45         {
  46             return new Site(ParseSiteFromUrl(url));
  47         }
  48
  49         private static SiteString ParseSiteFromUrl( String name )
  50         {
  51             URLString urlString = new URLString( name );
  52
  53             if (String.Compare( urlString.Scheme, "file", StringComparison.OrdinalIgnoreCase) == 0)
  54                 throw new ArgumentException( Environment.GetResourceString( "Argument_InvalidSite" ) );
  55
  56             return new SiteString( new URLString( name ).Host );
  57         }
  58
  59         public String Name
  60         {
  61             get { return m_name.ToString(); }
  62         }
  63
  64         internal SiteString GetSiteString()
  65         {
  66             return m_name;
  67         }
  68
  69         public IPermission CreateIdentityPermission( Evidence evidence )
  70         {
  71             return new SiteIdentityPermission( Name );
  72         }
  73
  74         public override bool Equals(Object o)
  75         {
  76             Site other = o as Site;
  77             if (other == null)
  78             {
  79                 return false;
  80             }
  81
  82             return String.Equals(Name, other.Name, StringComparison.OrdinalIgnoreCase);
  83         }
  84
  85         public override int GetHashCode()
  86         {
  87             return Name.GetHashCode();
  88         }
  89
  90         public override EvidenceBase Clone()
  91         {
  92             return new Site(m_name);
  93         }
  94
  95         public Object Copy()
  96         {
  97             return Clone();
  98         }
  99
 100 #if FEATURE_CAS_POLICY
 101         internal SecurityElement ToXml()
 102         {
 103             SecurityElement elem = new SecurityElement( "System.Security.Policy.Site" );
 104             // If you hit this assert then most likely you are trying to change the name of this class.
 105             // This is ok as long as you change the hard coded string above and change the assert below.
 106             Contract.Assert( this.GetType().FullName.Equals( "System.Security.Policy.Site" ), "Class name changed!" );
 107
 108             elem.AddAttribute( "version", "1" );
 109
 110             if(m_name != null)
 111                 elem.AddChild( new SecurityElement( "Name", m_name.ToString() ) );
 112
 113             return elem;
 114         }
 115 #endif // FEATURE_CAS_POLICY
 116
 117 #if FEATURE_CAS_POLICY
 118         public override String ToString()
 119         {
 120             return ToXml().ToString();
 121         }
 122 #endif // FEATURE_CAS_POLICY
 123
 124         // INormalizeForIsolatedStorage is not implemented for startup perf
 125         // equivalent to INormalizeForIsolatedStorage.Normalize()
 126         internal Object Normalize()
 127         {
 128             return m_name.ToString().ToUpper(CultureInfo.InvariantCulture);
 129         }
 130     }
 131 }