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The Labs \ Source Viewer \ SSCLI \ System.Security.Policy \ Site

SSCLI
  1. // ==++==
  2. //
  3. //
  4. // Copyright (c) 2006 Microsoft Corporation. All rights reserved.
  5. //
  6. // The use and distribution terms for this software are contained in the file
  7. // named license.txt, which can be found in the root of this distribution.
  8. // By using this software in any fashion, you are agreeing to be bound by the
  9. // terms of this license.
  10. //
  11. // You must not remove this notice, or any other, from this software.
  12. //
  13. //
  14. // ==--==
  16. //
  17. // Site.cs
  18. //
  19. // Site is an IIdentity representing internet sites.
  20. //
  22. namespace System.Security.Policy
  23. {
  24.     using System.Security.Util;
  25.     using System.Globalization;
  26.     using SiteIdentityPermission = System.Security.Permissions.SiteIdentityPermission;
  27.    
  28.     [Serializable()]
  29.     [System.Runtime.InteropServices.ComVisible(true)]
  30.     public sealed class Site : IIdentityPermissionFactory, IBuiltInEvidence
  31.     {
  32.         private SiteString m_name;
  33.        
  34.         internal Site()
  35.         {
  36.             m_name = null;
  37.         }
  38.        
  39.         public Site(string name)
  40.         {
  41.             if (name == null)
  42.                 throw new ArgumentNullException("name");
  43.            
  44.             m_name = new SiteString(name);
  45.         }
  46.        
  47.         internal Site(byte[] id, string name)
  48.         {
  49.             m_name = ParseSiteFromUrl(name);
  50.         }
  51.        
  52.         public static Site CreateFromUrl(string url)
  53.         {
  54.             Site site = new Site();
  55.            
  56.             site.m_name = ParseSiteFromUrl(url);
  57.            
  58.             return site;
  59.         }
  60.        
  61.         private static SiteString ParseSiteFromUrl(string name)
  62.         {
  63.             URLString urlString = new URLString(name);
  64.            
  65.             if (String.Compare(urlString.Scheme, "file", StringComparison.OrdinalIgnoreCase) == 0)
  66.                 throw new ArgumentException(Environment.GetResourceString("Argument_InvalidSite"));
  67.            
  68.             return new SiteString(new URLString(name).Host);
  69.         }
  70.        
  71.         public string Name {
  72.             get {
  73.                 if (m_name != null)
  74.                     return m_name.ToString();
  75.                 else
  76.                     return null;
  77.             }
  78.         }
  79.        
  80.         internal SiteString GetSiteString()
  81.         {
  82.             return m_name;
  83.         }
  84.        
  85.         public IPermission CreateIdentityPermission(Evidence evidence)
  86.         {
  87.             return new SiteIdentityPermission(Name);
  88.         }
  89.        
  90.         public override bool Equals(object o)
  91.         {
  92.             if (o is Site) {
  93.                 Site s = (Site)o;
  94.                 if (Name == null)
  95.                     return (s.Name == null);
  96.                
  97.                 return String.Compare(Name, s.Name, StringComparison.OrdinalIgnoreCase) == 0;
  98.             }
  99.            
  100.             return false;
  101.         }
  102.        
  103.         public override int GetHashCode()
  104.         {
  105.             string name = this.Name;
  106.            
  107.             if (name == null)
  108.                 return 0;
  109.             else
  110.                 return name.GetHashCode();
  111.         }
  112.        
  113.         public object Copy()
  114.         {
  115.             return new Site(this.Name);
  116.         }
  117.        
  118.         internal SecurityElement ToXml()
  119.         {
  120.             SecurityElement elem = new SecurityElement("System.Security.Policy.Site");
  121.             // If you hit this assert then most likely you are trying to change the name of this class.
  122.             // This is ok as long as you change the hard coded string above and change the assert below.
  123.             BCLDebug.Assert(this.GetType().FullName.Equals("System.Security.Policy.Site"), "Class name changed!");
  124.            
  125.             elem.AddAttribute("version", "1");
  126.            
  127.             if (m_name != null)
  128.                 elem.AddChild(new SecurityElement("Name", m_name.ToString()));
  129.            
  130.             return elem;
  131.         }
  132.        
  133.         /// <internalonly/>
  134.         int IBuiltInEvidence.OutputToBuffer(char[] buffer, int position, bool verbose)
  135.         {
  136.             buffer[position++] = BuiltInEvidenceHelper.idSite;
  137.             string name = this.Name;
  138.             int length = name.Length;
  139.            
  140.             if (verbose) {
  141.                 BuiltInEvidenceHelper.CopyIntToCharArray(length, buffer, position);
  142.                 position += 2;
  143.             }
  144.             name.CopyTo(0, buffer, position, length);
  145.             return length + position;
  146.         }
  147.        
  148.         /// <internalonly/>
  149.         int IBuiltInEvidence.GetRequiredSize(bool verbose)
  150.         {
  151.             if (verbose)
  152.                 return this.Name.Length + 3;
  153.             else
  154.                 return this.Name.Length + 1;
  155.         }
  156.        
  157.         /// <internalonly/>
  158.         int IBuiltInEvidence.InitFromBuffer(char[] buffer, int position)
  159.         {
  160.             int length = BuiltInEvidenceHelper.GetIntFromCharArray(buffer, position);
  161.             position += 2;
  162.            
  163.             m_name = new SiteString(new string(buffer, position, length));
  164.            
  165.             return position + length;
  166.         }
  167.        
  168.         public override string ToString()
  169.         {
  170.             return ToXml().ToString();
  171.         }
  172.        
  173.         // INormalizeForIsolatedStorage is not implemented for startup perf
  174.         // equivalent to INormalizeForIsolatedStorage.Normalize()
  175.         internal object Normalize()
  176.         {
  177.             return m_name.ToString().ToUpper(CultureInfo.InvariantCulture);
  178.         }
  179.     }
  180. }

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