UrlIdentityPermission Class
Defines the identity permission for the URL from which the code originates. This class cannot be inherited.
For a list of all members of this type, see UrlIdentityPermission Members.
System.Object
System.Security.CodeAccessPermission
System.Security.Permissions.UrlIdentityPermission
[Visual Basic] <Serializable> NotInheritable Public Class UrlIdentityPermission Inherits CodeAccessPermission [C#] [Serializable] public sealed class UrlIdentityPermission : CodeAccessPermission [C++] [Serializable] public __gc __sealed class UrlIdentityPermission : public CodeAccessPermission [JScript] public Serializable class UrlIdentityPermission extends CodeAccessPermission
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Remarks
The complete URL is considered, including the protocol (HTTP, HTTPS, FTP) and the file. For example, http://www.fourthcoffee.com/process/grind.htm is a complete URL.
URLs can be matched exactly or by a wildcard in the final position, for example: http://www.fourthcoffee.com/process/*.
CAUTION UrlIdentityPermission grants permission for all paths to the file, including both the URL and the IP address. To Deny access to the file, you must Deny all possible paths to the file. For example, if http://www.fourthcoffee.com/process/grind.htm is located at IP address 192.168.238.241, to Deny access to http://www.fourthcoffee.com/process/grind.htm, you must Deny http://www.fourthcoffee.com/process/grind.htm, 192.168.238.241/grind.htm and any other path that you can use to access the code. Unfortunately, there are a myriad of ways URL paths can be phrased, so it is extremely difficult to block all paths through the use of Deny alone. A better technique to deal with multiple paths is to use a combination of PermitOnly and Deny. PermitOnly allows you to identify a finite set of URLs that you can provide access to, and then Deny allows you to explicitly select addresses from that set that you want to deny access to. For more information on this subject and the use of PermitOnly with Deny, see Canonicalization Problems Using Deny in the Deny topic.
Example
[Visual Basic] ' This sample demonstrates the IsSubsetOf, Union, Intersect, Copy, ToXml and FromXml methods ' of the UrlIdentityPermission class. Imports System Imports System.Security Imports System.Security.Permissions Imports Microsoft.VisualBasic <Assembly: CLSCompliant(True)> Public Class UrlIdentityPermissionDemo ' IsSubsetOf determines whether the current permission is a subset of the specified permission. Private Function IsSubsetOfDemo() As Boolean Dim returnValue As Boolean = True Dim url1, url2 As String Dim urlIdPerm1, urlIdPerm2 As UrlIdentityPermission Dim urlGen1 As New UrlGenerator() Dim urlGen2 As New UrlGenerator() urlGen1.ResetIndex() While urlGen1.CreateUrl(urlIdPerm1, url1) If urlIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If urlGen2.ResetIndex() Console.WriteLine("********************************************************\n") While urlGen2.CreateUrl(urlIdPerm2, url2) Dim firstPermission As String = IIf(url1 = "" Or url1 Is Nothing, "null", url1) Dim secondPermission As String = IIf(url2 = "" Or url2 Is Nothing, "null", url2) If urlIdPerm2 Is Nothing Then GoTo ContinueWhile2 End If Try If urlIdPerm1.IsSubsetOf(urlIdPerm2) Then Console.WriteLine(firstPermission & ControlChars.Lf & " is a subset of " & secondPermission & ControlChars.Lf) Else Console.WriteLine(firstPermission & ControlChars.Lf & " is not a subset of " & secondPermission & ControlChars.Lf) End If Catch e As Exception Console.WriteLine(IIf("An exception was thrown for subset :" & url1 = "", "null.", IIf(url1 & ControlChars.Lf & url2 = "", "null.", url2 & ControlChars.Lf & e.ToString()))) End Try ContinueWhile2: End While ContinueWhile1: End While Return returnValue End Function 'IsSubsetOfDemo ' Union creates a new permission that is the union of the current permission and ' the specified permission. Private Function UnionDemo() As Boolean Dim returnValue As Boolean = True Dim url1, url2 As String Dim urlIdPerm1, urlIdPerm2 As UrlIdentityPermission Dim urlIdPerm3 As IPermission Dim urlGen1 As New UrlGenerator() Dim urlGen2 As New UrlGenerator() urlGen1.ResetIndex() While urlGen1.CreateUrl(urlIdPerm1, url1) If urlIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If Console.WriteLine("**********************************************************" & ControlChars.Lf) urlGen2.ResetIndex() While urlGen2.CreateUrl(urlIdPerm2, url2) Try If urlIdPerm2 Is Nothing Then GoTo ContinueWhile2 End If Dim firstPermission As String = IIf(url1 = "" Or url1 Is Nothing, "null", url1) Dim secondPermission As String = IIf(url2 = "" Or url2 Is Nothing, "null", url2) urlIdPerm3 = CType(urlIdPerm1.Union(urlIdPerm2), UrlIdentityPermission) urlIdPerm3 = urlIdPerm1.Union(urlIdPerm2) If urlIdPerm3 Is Nothing Then Console.WriteLine("The union of " & firstPermission & " and " & ControlChars.Lf & ControlChars.Tab & secondPermission & " is null.") Else Console.WriteLine("The union of " & firstPermission & " and " & ControlChars.Lf & ControlChars.Tab & secondPermission & " = " & ControlChars.Lf & ControlChars.Tab & CType(urlIdPerm3, UrlIdentityPermission).Url.ToString()) End If Catch e As Exception Console.WriteLine("An exception was thrown for union :" & e.ToString()) returnValue = False End Try ContinueWhile2: End While ContinueWhile1: End While Return returnValue End Function 'UnionDemo ' Intersect creates and returns a new permission that is the intersection of the ' current permission and the permission specified. Private Function IntersectDemo() As Boolean Dim returnValue As Boolean = True Dim url1, url2 As String Dim urlIdPerm1, urlIdPerm2, urlIdPerm3 As UrlIdentityPermission Dim urlGen1 As New UrlGenerator() Dim urlGen2 As New UrlGenerator() urlGen1.ResetIndex() While urlGen1.CreateUrl(urlIdPerm1, url1) If urlIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If Console.WriteLine("**********************************************************" & ControlChars.Lf) urlGen2.ResetIndex() Console.WriteLine("********************************************************\n") While urlGen2.CreateUrl(urlIdPerm2, url2) If urlIdPerm2 Is Nothing Then GoTo ContinueWhile2 End If Dim firstPermission As String = IIf(url1 = "" Or url1 Is Nothing, "null", url1) Dim secondPermission As String = IIf(url2 = "" Or url2 Is Nothing, "null", url2) Try urlIdPerm3 = CType(urlIdPerm1.Intersect(urlIdPerm2), UrlIdentityPermission) If Not (urlIdPerm3 Is Nothing) AndAlso Not (urlIdPerm3.Url Is Nothing) Then Console.WriteLine("The intersection of " & firstPermission & " and " & ControlChars.Lf & ControlChars.Tab & secondPermission & " = " & ControlChars.Lf & ControlChars.Tab & CType(urlIdPerm3, UrlIdentityPermission).Url.ToString()) Else Console.WriteLine("The intersection of " & firstPermission & " and " & ControlChars.Lf & ControlChars.Tab & secondPermission & " is null. ") End If Catch e As Exception Console.WriteLine("An exception was thrown for the intersection : " & e.ToString()) returnValue = False End Try ContinueWhile2: End While ContinueWhile1: End While Return returnValue End Function 'IntersectDemo 'Copy creates and returns an identical copy of the current permission. Private Function CopyDemo() As Boolean Dim returnValue As Boolean = True Dim url1 As String Dim urlIdPerm1, urlIdPerm2 As UrlIdentityPermission Dim urlGen1 As New UrlGenerator() Dim urlGen2 As New UrlGenerator() urlGen1.ResetIndex() While urlGen1.CreateUrl(urlIdPerm1, url1) If urlIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If urlGen2.ResetIndex() Console.WriteLine("********************************************************\n") Try urlIdPerm2 = CType(urlIdPerm1.Copy(), UrlIdentityPermission) If Not (urlIdPerm2 Is Nothing) Then Console.WriteLine("Result of copy = " & urlIdPerm2.ToString() & ControlChars.Lf) Else Console.WriteLine("Result of copy is null. " & ControlChars.Lf) End If Catch e As Exception If (True.ToString()) Then If url1 = "" Then Console.WriteLine("The target UrlIdentityPermission is empty; copy failed.") Else Console.WriteLine(e.ToString()) End If End If GoTo ContinueWhile1 End Try ContinueWhile1: End While Return returnValue End Function 'CopyDemo ' ToXml creates an XML encoding of the permission and its current state; FromXml ' reconstructs a permission with the specified state from the XML encoding. Private Function ToFromXmlDemo() As Boolean Dim returnValue As Boolean = True Dim url1 As String Dim urlIdPerm1, urlIdPerm2 As UrlIdentityPermission Dim urlGen1 As New UrlGenerator() Dim urlGen2 As New UrlGenerator() urlGen1.ResetIndex() While urlGen1.CreateUrl(urlIdPerm1, url1) If urlIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If Console.WriteLine("********************************************************\n") urlGen2.ResetIndex() Try urlIdPerm2 = New UrlIdentityPermission(PermissionState.None) urlIdPerm2.FromXml(urlIdPerm1.ToXml()) Console.WriteLine("Result of ToFromXml = " & urlIdPerm2.ToString()) Catch e As Exception Console.WriteLine("ToFromXml failed :" & urlIdPerm1.ToString() & e.ToString()) GoTo ContinueWhile1 End Try ContinueWhile1: End While Return returnValue End Function 'ToFromXmlDemo ' Invoke all demos. Public Function runDemo() As Boolean Dim ret As Boolean = True Dim retTmp As Boolean ' Call IsSubsetOf demo. retTmp = IsSubsetOfDemo() If retTmp Then Console.Out.WriteLine("IsSubset demo completed successfully.") Else Console.Out.WriteLine("IsSubset demo failed.") End If ret = retTmp AndAlso ret ' Call Union demo. retTmp = UnionDemo() If retTmp Then Console.Out.WriteLine("Union demo completed successfully.") Else Console.Out.WriteLine("Union demo failed.") End If ret = retTmp AndAlso ret ' Call Intersect demo. retTmp = IntersectDemo() If retTmp Then Console.Out.WriteLine("Intersect demo completed successfully.") Else Console.Out.WriteLine("Intersect demo failed.") End If ret = retTmp AndAlso ret ' Call Copy demo. retTmp = CopyDemo() If retTmp Then Console.Out.WriteLine("Copy demo completed successfully.") Else Console.Out.WriteLine("Copy demo failed.") End If ret = retTmp AndAlso ret ' Call ToFromXml demo. retTmp = ToFromXmlDemo() If retTmp Then Console.Out.WriteLine("ToFromXml demo completed successfully.") Else Console.Out.WriteLine("ToFromXml demo failed.") End If ret = retTmp AndAlso ret Return ret End Function 'runDemo ' Test harness. Public Overloads Shared Sub Main(ByVal args() As [String]) Try Dim democase As New UrlIdentityPermissionDemo() Dim ret As Boolean = democase.runDemo() If ret Then Console.Out.WriteLine("UrlIdentity demo completed successfully.") Console.Out.WriteLine("Press the Enter key to exit.") Dim consoleInput As String = Console.ReadLine() System.Environment.ExitCode = 100 Else Console.Out.WriteLine("UrlIdentity demo failed.") Console.Out.WriteLine("Press the Enter key to exit.") Dim consoleInput As String = Console.ReadLine() System.Environment.ExitCode = 101 End If Catch e As Exception Console.Out.WriteLine("UrlIdentity demo failed.") Console.WriteLine(e.ToString()) Console.Out.WriteLine("Press the Enter key to exit.") Dim consoleInput As String = Console.ReadLine() System.Environment.ExitCode = 101 End Try End Sub 'Main End Class 'UrlIdentityPermissionDemo ' This class generates UrlIdentityPermission objects. Friend Class UrlGenerator Private myUrl As String() = {"http://www.fourthcoffee.com/process/grind.htm", "http://www.fourthcoffee.com/process/*", "http://www.fourthcoffee.com/*", "http://www.fourthcoffee.com/process/*", "http://www.contoso.com/math.asmx"} Private urlIndex As Integer = 0 Public Sub New() ResetIndex() End Sub 'New Public Sub ResetIndex() urlIndex = 0 End Sub 'ResetIndex ' CreateUrl creates a UrlIdentityPermission. Public Function CreateUrl(ByRef urlPerm As UrlIdentityPermission, ByRef url As String) As Boolean If urlIndex = myUrl.Length Then urlPerm = New UrlIdentityPermission(PermissionState.None) url = "" urlIndex &= 1 Return True End If If urlIndex > myUrl.Length Then urlPerm = Nothing url = "" Return False End If url = myUrl(urlIndex) urlIndex = urlIndex + 1 Try urlPerm = New UrlIdentityPermission(url) Return True Catch e As Exception Console.WriteLine("Cannot create UrlIdentityPermission : " & url & " " & e.ToString()) urlPerm = New UrlIdentityPermission(PermissionState.None) url = "" Return True End Try End Function 'CreateUrl ' End of UrlGenerator. [C#] // This sample demonstrates the IsSubsetOf, Union, Intersect, Copy, ToXml and FromXml methods // of the UrlIdentityPermission class. using System; using System.Security; using System.Security.Permissions; [assembly:CLSCompliant(true)] public class UrlIdentityPermissionDemo { // IsSubsetOf determines whether the current permission is a subset of the specified permission. private bool IsSubsetOfDemo() { bool returnValue = true; string url1,url2; UrlIdentityPermission urlIdPerm1,urlIdPerm2; UrlGenerator urlGen1 = new UrlGenerator(); UrlGenerator urlGen2 = new UrlGenerator(); urlGen1.ResetIndex(); while(urlGen1.CreateUrl(out urlIdPerm1, out url1)) { if(urlIdPerm1 == null) continue; urlGen2.ResetIndex(); Console.WriteLine("********************************************************\n"); while(urlGen2.CreateUrl(out urlIdPerm2, out url2)) { string firstPermission = url1 == "" | url1 == null ? "null" : url1 ; string secondPermission = url2 == "" | url2 == null ? "null" : url2; if(urlIdPerm2 == null) continue; try { if (urlIdPerm1.IsSubsetOf(urlIdPerm2)) { Console.WriteLine(firstPermission +"\n is a subset of " + secondPermission + "\n"); } else { Console.WriteLine(firstPermission +"\n is not a subset of " + secondPermission + "\n"); } } catch(Exception e) { Console.WriteLine("An exception was thrown for subset :" + url1 == "" ? "null." : url1 + "\n" + url2 == "" ? "null." : url2 +"\n" + e); } } } return returnValue; } // Union creates a new permission that is the union of the current permission and // the specified permission. private bool UnionDemo() { bool returnValue = true; string url1,url2; UrlIdentityPermission urlIdPerm1,urlIdPerm2; IPermission urlIdPerm3; UrlGenerator urlGen1 = new UrlGenerator(); UrlGenerator urlGen2 = new UrlGenerator(); urlGen1.ResetIndex(); while(urlGen1.CreateUrl(out urlIdPerm1, out url1)) { if(urlIdPerm1 == null) continue; Console.WriteLine("**********************************************************\n"); urlGen2.ResetIndex(); while(urlGen2.CreateUrl(out urlIdPerm2, out url2)) { try { if(urlIdPerm2 == null) continue; string firstPermission = url1 == "" | url1 == null ? "null" : url1 ; string secondPermission = url2 == "" | url2 == null ? "null" : url2; urlIdPerm3 = (UrlIdentityPermission)urlIdPerm1.Union(urlIdPerm2); urlIdPerm3 = urlIdPerm1.Union(urlIdPerm2); if(urlIdPerm3 == null) { Console.WriteLine("The union of " + firstPermission + " and \n\t" + secondPermission + " is null."); } else { Console.WriteLine("The union of " + firstPermission + " and \n\t" + secondPermission + " = \n\t" + ((UrlIdentityPermission)urlIdPerm3).Url.ToString()); } } catch(Exception e) { Console.WriteLine("An exception was thrown for union :" + e); returnValue=false; } } } return returnValue; } // Intersect creates and returns a new permission that is the intersection of the // current permission and the permission specified. private bool IntersectDemo() { bool returnValue = true; string url1,url2; UrlIdentityPermission urlIdPerm1,urlIdPerm2,urlIdPerm3; UrlGenerator urlGen1 = new UrlGenerator(); UrlGenerator urlGen2 = new UrlGenerator(); urlGen1.ResetIndex(); while(urlGen1.CreateUrl(out urlIdPerm1, out url1)) { if(urlIdPerm1 == null) continue; Console.WriteLine("**********************************************************\n"); urlGen2.ResetIndex(); Console.WriteLine("********************************************************\n"); while(urlGen2.CreateUrl(out urlIdPerm2, out url2)) { if(urlIdPerm2 == null) continue; string firstPermission = url1 == "" | url1 == null ? "null" : url1 ; string secondPermission = url2 == "" | url2 == null ? "null" : url2; try { urlIdPerm3 = (UrlIdentityPermission)urlIdPerm1.Intersect(urlIdPerm2); if (urlIdPerm3 != null && urlIdPerm3.Url != null) { Console.WriteLine("The intersection of " + firstPermission + " and \n\t" + secondPermission + " = \n\t" + ((UrlIdentityPermission)urlIdPerm3).Url.ToString()); } else { Console.WriteLine("The intersection of " + firstPermission + " and \n\t" + secondPermission + " is null. "); } } catch(Exception e) { Console.WriteLine("An exception was thrown for the intersection : " + e); returnValue=false; } } } return returnValue; } //Copy creates and returns an identical copy of the current permission. private bool CopyDemo() { bool returnValue = true; string url1; UrlIdentityPermission urlIdPerm1,urlIdPerm2; UrlGenerator urlGen1 = new UrlGenerator(); UrlGenerator urlGen2 = new UrlGenerator(); urlGen1.ResetIndex(); while(urlGen1.CreateUrl(out urlIdPerm1, out url1)) { if(urlIdPerm1 == null ) continue; urlGen2.ResetIndex(); Console.WriteLine("********************************************************\n"); try { urlIdPerm2 = (UrlIdentityPermission)urlIdPerm1.Copy(); if (urlIdPerm2 != null) { Console.WriteLine("Result of copy = " + urlIdPerm2.ToString() + "\n"); } else { Console.WriteLine("Result of copy is null. \n"); } } catch(Exception e) { { if (url1 == "") { Console.WriteLine( "The target UrlIdentityPermission is empty; copy failed."); } else Console.WriteLine( e); } continue; } } return returnValue; } // ToXml creates an XML encoding of the permission and its current state; FromXml // reconstructs a permission with the specified state from the XML encoding. private bool ToFromXmlDemo() { bool returnValue = true; string url1; UrlIdentityPermission urlIdPerm1,urlIdPerm2; UrlGenerator urlGen1 = new UrlGenerator(); UrlGenerator urlGen2 = new UrlGenerator(); urlGen1.ResetIndex(); while(urlGen1.CreateUrl(out urlIdPerm1, out url1)) { if(urlIdPerm1 == null) continue; Console.WriteLine("********************************************************\n"); urlGen2.ResetIndex(); try { urlIdPerm2= new UrlIdentityPermission(PermissionState.None); urlIdPerm2.FromXml(urlIdPerm1.ToXml()); Console.WriteLine("Result of ToFromXml = " +urlIdPerm2.ToString() + "\n"); } catch(Exception e) { Console.WriteLine("ToFromXml failed :" + urlIdPerm1.ToString() + e); continue; } } return returnValue; } // Invoke all demos. public bool runDemo() { bool ret=true; bool retTmp; // Call IsSubsetOf demo. retTmp= IsSubsetOfDemo(); if(retTmp) Console.Out.WriteLine("IsSubset demo completed successfully."); else Console.Out.WriteLine("IsSubset demo failed."); ret=retTmp && ret; // Call Union demo. retTmp= UnionDemo(); if(retTmp) Console.Out.WriteLine("Union demo completed successfully."); else Console.Out.WriteLine("Union demo failed."); ret=retTmp && ret; // Call Intersect demo. retTmp= IntersectDemo(); if(retTmp) Console.Out.WriteLine("Intersect demo completed successfully."); else Console.Out.WriteLine("Intersect demo failed."); ret=retTmp && ret; // Call Copy demo. retTmp= CopyDemo(); if(retTmp) Console.Out.WriteLine("Copy demo completed successfully."); else Console.Out.WriteLine("Copy demo failed."); ret=retTmp && ret; // Call ToFromXml demo. retTmp= ToFromXmlDemo(); if(retTmp)Console.Out.WriteLine("ToFromXml demo completed successfully."); else Console.Out.WriteLine("ToFromXml demo failed."); ret=retTmp && ret; return ( ret ); } // Test harness. public static void Main(String[] args) { try { UrlIdentityPermissionDemo democase = new UrlIdentityPermissionDemo(); bool ret = democase.runDemo(); if (ret) { Console.Out.WriteLine("UrlIdentity demo completed successfully."); Console.Out.WriteLine("Press the Enter key to exit."); string consoleInput = Console.ReadLine(); System.Environment.ExitCode = 100; } else { Console.Out.WriteLine("UrlIdentity demo failed."); Console.Out.WriteLine("Press the Enter key to exit."); string consoleInput = Console.ReadLine(); System.Environment.ExitCode = 101; } } catch(Exception e) { Console.Out.WriteLine("UrlIdentity demo failed."); Console.WriteLine(e.ToString()); Console.Out.WriteLine("Press the Enter key to exit."); string consoleInput = Console.ReadLine(); System.Environment.ExitCode = 101; } } } // This class generates UrlIdentityPermission objects. internal class UrlGenerator { private string[] myUrl = {"http://www.fourthcoffee.com/process/grind.htm","http://www.fourthcoffee.com/process/*", "http://www.fourthcoffee.com/*","http://www.fourthcoffee.com/process/*","http://www.contoso.com/math.asmx"}; private int urlIndex = 0; public UrlGenerator() { ResetIndex(); } public void ResetIndex() { urlIndex = 0; } // CreateUrl creates a UrlIdentityPermission. public bool CreateUrl(out UrlIdentityPermission urlPerm, out string url) { if(urlIndex == myUrl.Length) { urlPerm = new UrlIdentityPermission(PermissionState.None); url=""; urlIndex++; return true; } if(urlIndex > myUrl.Length) { urlPerm = null; url = ""; return false; } url = myUrl[urlIndex++]; try { urlPerm = new UrlIdentityPermission(url); return true; } catch(Exception e) { Console.WriteLine("Cannot create UrlIdentityPermission : " + url +" "+e); urlPerm = new UrlIdentityPermission(PermissionState.None); url=""; return true; } } } // End of UrlGenerator. [C++] // This sample demonstrates the IsSubsetOf, Union, Intersect, Copy, ToXml and FromXml methods // of the UrlIdentityPermission class. #using <mscorlib.dll> using namespace System; using namespace System::Security; using namespace System::Security::Permissions; using namespace System::Runtime::InteropServices; [assembly:CLSCompliant(true)]; // This class generates UrlIdentityPermission objects. private __gc class UrlGenerator { private: String* myUrl[]; private: int urlIndex; public: UrlGenerator() { String* temp0 [] = { S"http://www.fourthcoffee.com/process/grind.htm", S"http://www.fourthcoffee.com/process/*", S"http://www.fourthcoffee.com/*", S"http://www.fourthcoffee.com/process/*", S"http://www.contoso.com/math.asmx" }; myUrl = temp0; ResetIndex(); } public: void ResetIndex() { urlIndex = 0; } // CreateUrl creates a UrlIdentityPermission. public: bool CreateUrl([Out] UrlIdentityPermission** urlPerm, [Out] String** url) { if (urlIndex == myUrl->Length) { *urlPerm = new UrlIdentityPermission(PermissionState::None); *url=S""; urlIndex++; return true; } if (urlIndex > myUrl->Length) { *urlPerm = 0; *url = S""; return false; } *url = myUrl[urlIndex++]; try { *urlPerm = new UrlIdentityPermission(*url); return true; } catch (Exception* e) { Console::WriteLine(S"Cannot create UrlIdentityPermission : {0} {1}", *url, e); *urlPerm = new UrlIdentityPermission(PermissionState::None); *url=S""; return false; } } }; // End of UrlGenerator. public __gc class UrlIdentityPermissionDemo { // IsSubsetOf determines whether the current permission is a subset of the specified permission. private: bool IsSubsetOfDemo() { bool returnValue = true; String* url1, *url2; UrlIdentityPermission* urlIdPerm1, *urlIdPerm2; UrlGenerator* urlGen1 = new UrlGenerator(); UrlGenerator* urlGen2 = new UrlGenerator(); urlGen1->ResetIndex(); while(urlGen1->CreateUrl(&urlIdPerm1, &url1)) { if (urlIdPerm1 == 0) continue; urlGen2->ResetIndex(); Console::WriteLine(S"********************************************************\n"); while(urlGen2->CreateUrl(&urlIdPerm2, &url2)) { String* firstPermission = url1->Equals(S"") || url1 == 0 ? S"null" : url1 ; String* secondPermission = url2->Equals(S"") || url2 == 0 ? S"null" : url2; if (urlIdPerm2 == 0) continue; try { if (urlIdPerm1->IsSubsetOf(urlIdPerm2)) { Console::WriteLine(S"{0}\n is a subset of {1}\n", firstPermission, secondPermission); } else { Console::WriteLine(S"{0}\n is not a subset of {1}\n", firstPermission, secondPermission); } } catch (Exception* e) { Console::WriteLine(S"An exception was thrown for subset : {0}\n{1}\n{2}", url1->Equals(S"") ? S"0." : url1, url2->Equals(S"") ? S"0." : url2, e); } } } return returnValue; } // Union creates a new permission that is the union of the current permission and // the specified permission. private: bool UnionDemo() { bool returnValue = true; String* url1, *url2; UrlIdentityPermission* urlIdPerm1, *urlIdPerm2; IPermission* urlIdPerm3; UrlGenerator* urlGen1 = new UrlGenerator(); UrlGenerator* urlGen2 = new UrlGenerator(); urlGen1->ResetIndex(); while(urlGen1->CreateUrl(&urlIdPerm1, &url1)) { if (urlIdPerm1 == 0) continue; Console::WriteLine(S"**********************************************************\n"); urlGen2->ResetIndex(); while(urlGen2->CreateUrl(&urlIdPerm2, &url2)) { try { if (urlIdPerm2 == 0) continue; String* firstPermission = url1->Equals(S"") || url1 == 0 ? S"null" : url1 ; String* secondPermission = url2->Equals(S"") || url2 == 0 ? S"null" : url2; urlIdPerm3 = dynamic_cast<UrlIdentityPermission*>(urlIdPerm1->Union(urlIdPerm2)); urlIdPerm3 = urlIdPerm1->Union(urlIdPerm2); if (urlIdPerm3 == 0) { Console::WriteLine(S"The union of {0} and \n\t{1} is null.", firstPermission, secondPermission); } else { Console::WriteLine(S"The union of {0} and \n\t{1} = \n\t{2}", firstPermission, secondPermission, (dynamic_cast<UrlIdentityPermission*>(urlIdPerm3))->Url); } } catch (Exception* e) { Console::WriteLine(S"An exception was thrown for union : {0}", e); returnValue=false; } } } return returnValue; } // Intersect creates and returns a new permission that is the intersection of the // current permission and the permission specified. private: bool IntersectDemo() { bool returnValue = true; String* url1, *url2; UrlIdentityPermission* urlIdPerm1, *urlIdPerm2, *urlIdPerm3; UrlGenerator* urlGen1 = new UrlGenerator(); UrlGenerator* urlGen2 = new UrlGenerator(); urlGen1->ResetIndex(); while(urlGen1->CreateUrl(&urlIdPerm1, &url1)) { if (urlIdPerm1 == 0) continue; Console::WriteLine(S"**********************************************************\n"); urlGen2->ResetIndex(); Console::WriteLine(S"********************************************************\n"); while(urlGen2->CreateUrl(&urlIdPerm2, &url2)) { if (urlIdPerm2 == 0) continue; String* firstPermission = url1->Equals(S"") || url1 == 0 ? S"null" : url1 ; String* secondPermission = url2->Equals(S"") || url2 == 0 ? S"null" : url2; try { urlIdPerm3 = dynamic_cast<UrlIdentityPermission*>(urlIdPerm1->Intersect(urlIdPerm2)); if (urlIdPerm3 != 0 && urlIdPerm3->Url != 0) { Console::WriteLine(S"The intersection of {0} and \n\t{1} = \n\t{2}", firstPermission, secondPermission, (dynamic_cast<UrlIdentityPermission*>(urlIdPerm3))->Url); } else { Console::WriteLine(S"The intersection of {0} and \n\t{1} is null. ", firstPermission, secondPermission); } } catch (Exception* e) { Console::WriteLine(S"An exception was thrown for the intersection : {0}", e); returnValue=false; } } } return returnValue; } //Copy creates and returns an identical copy of the current permission. private: bool CopyDemo() { bool returnValue = true; String* url1; UrlIdentityPermission* urlIdPerm1, *urlIdPerm2; UrlGenerator* urlGen1 = new UrlGenerator(); UrlGenerator* urlGen2 = new UrlGenerator(); urlGen1->ResetIndex(); while(urlGen1->CreateUrl(&urlIdPerm1, &url1)) { if (urlIdPerm1 == 0) continue; urlGen2->ResetIndex(); Console::WriteLine(S"********************************************************\n"); try { urlIdPerm2 = dynamic_cast<UrlIdentityPermission*>(urlIdPerm1->Copy()); if (urlIdPerm2 != 0) { Console::WriteLine(S"Result of copy = {0}\n", urlIdPerm2); } else { Console::WriteLine(S"Result of copy is null. \n"); } } catch (Exception* e) { { if (url1->Equals(S"")) { Console::WriteLine(S"The target UrlIdentityPermission is empty; copy failed."); } else Console::WriteLine(e); } continue; } } return returnValue; } // ToXml creates an XML encoding of the permission and its current state; FromXml // reconstructs a permission with the specified state from the XML encoding. private: bool ToFromXmlDemo() { bool returnValue = true; String* url1; UrlIdentityPermission* urlIdPerm1, *urlIdPerm2; UrlGenerator* urlGen1 = new UrlGenerator(); UrlGenerator* urlGen2 = new UrlGenerator(); urlGen1->ResetIndex(); while(urlGen1->CreateUrl(&urlIdPerm1, &url1)) { if (urlIdPerm1 == 0) continue; Console::WriteLine(S"********************************************************\n"); urlGen2->ResetIndex(); try { urlIdPerm2 = new UrlIdentityPermission(PermissionState::None); urlIdPerm2->FromXml(urlIdPerm1->ToXml()); Console::WriteLine(S"Result of ToFromXml = {0}\n", urlIdPerm2); } catch (Exception* e) { Console::WriteLine(S"ToFromXml failed : {0}{1}", urlIdPerm1, e); continue; } } return returnValue; } // Invoke all demos. public: bool runDemo() { bool ret=true; bool retTmp; // Call IsSubsetOf demo. retTmp= IsSubsetOfDemo(); if (retTmp) Console::WriteLine(S"IsSubset demo completed successfully."); else Console::WriteLine(S"IsSubset demo failed."); ret=retTmp && ret; // Call Union demo. retTmp= UnionDemo(); if (retTmp) Console::WriteLine(S"Union demo completed successfully."); else Console::WriteLine(S"Union demo failed."); ret=retTmp && ret; // Call Intersect demo. retTmp= IntersectDemo(); if (retTmp) Console::WriteLine(S"Intersect demo completed successfully."); else Console::WriteLine(S"Intersect demo failed."); ret=retTmp && ret; // Call Copy demo. retTmp= CopyDemo(); if (retTmp) Console::WriteLine(S"Copy demo completed successfully."); else Console::WriteLine(S"Copy demo failed."); ret=retTmp && ret; // Call ToFromXml demo. retTmp= ToFromXmlDemo(); if (retTmp) Console::WriteLine(S"ToFromXml demo completed successfully."); else Console::WriteLine(S"ToFromXml demo failed."); ret=retTmp && ret; return (ret); } }; // Test harness. int main() { try { UrlIdentityPermissionDemo* democase = new UrlIdentityPermissionDemo(); bool ret = democase->runDemo(); if (ret) { Console::WriteLine(S"UrlIdentity demo completed successfully."); Console::WriteLine(S"Press the Enter key to exit."); Console::ReadLine(); System::Environment::ExitCode = 100; } else { Console::WriteLine(S"UrlIdentity demo failed."); Console::WriteLine(S"Press the Enter key to exit."); Console::ReadLine(); System::Environment::ExitCode = 101; } } catch (Exception* e) { Console::WriteLine(S"UrlIdentity demo failed."); Console::WriteLine(e); Console::WriteLine(S"Press the Enter key to exit."); Console::ReadLine(); System::Environment::ExitCode = 101; } }
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Requirements
Namespace: System.Security.Permissions
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
Assembly: Mscorlib (in Mscorlib.dll)
See Also
UrlIdentityPermission Members | System.Security.Permissions Namespace | Permissions | Requesting Permissions | UrlIdentityPermissionAttribute | Url | UrlMembershipCondition