UrlIdentityPermission 类
为代码源自的 URL 定义标识权限。无法继承此类。
**命名空间:**System.Security.Permissions
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public NotInheritable Class UrlIdentityPermission
Inherits CodeAccessPermission
用法
Dim instance As UrlIdentityPermission
[SerializableAttribute]
[ComVisibleAttribute(true)]
public sealed class UrlIdentityPermission : CodeAccessPermission
[SerializableAttribute]
[ComVisibleAttribute(true)]
public ref class UrlIdentityPermission sealed : public CodeAccessPermission
/** @attribute SerializableAttribute() */
/** @attribute ComVisibleAttribute(true) */
public final class UrlIdentityPermission extends CodeAccessPermission
SerializableAttribute
ComVisibleAttribute(true)
public final class UrlIdentityPermission extends CodeAccessPermission
备注
考虑完整的 URL，包括协议（HTTP、HTTPS、FTP）和文件。例如，https://www.fourthcoffee.com/process/grind.htm 就是一个完整的 URL。
URL 既可以精确匹配，也可在最后一个位置使用通配符来匹配，例如：https://www.fourthcoffee.com/process/*。URL 还可以在点分隔符处包含通配符（“*”）前缀。例如，URL 名称字符串 https://www.fourthcoffee.com/process/grind.htm/ 就是 http://*.fourthcoffee.com/process/grind.htm/ 和 http://*.com/process/grind.htm/ 的一个子集。
警告
UrlIdentityPermission 将授予文件所有路径的权限，包括 URL 和 IP 地址。若要 Deny 对文件的访问，则必须 Deny 该文件所有可能的路径。例如，如果 https://www.fourthcoffee.com/process/grind.htm 位于 IP 地址 192.168.238.241，若要 Deny 对 https://www.fourthcoffee.com/process/grind.htm 的访问，则必须 Deny https://www.fourthcoffee.com/process/grind.htm、192.168.238.241/grind.htm 和其他任何可以用来访问该代码的路径。不幸的是，存在大量可以表达 URL 路径的方法，因此很难只通过使用 Deny 来阻止所有的路径。处理多路径的一个更好的方法是结合使用 PermitOnly 和 Deny。可以使用 PermitOnly 来标识您可以提供访问的 URL 的有限集合，然后使用 Deny 从集合中显式选择要拒绝访问的地址。有关此主题以及结合使用 PermitOnly 和 Deny 的更多信息，请参见 使用 Deny 方法 主题中的 Canonicalization Problems Using Deny。
提示
在 .NET Framework 1.0 和 1.1 版中，标识权限不能具有 Unrestricted 权限状态值。在 .NET Framework 2.0 版中，标识权限可以具有任何权限状态值。这意味着在 2.0 版本中，标识权限与实现 IUnrestrictedPermission 接口的权限具有相同的行为。有关使用 1.1 版 CAS 策略执行 2.0 版应用程序的信息，请参见 <legacyV1CASPolicy> 元素。
示例
下面的示例演示 UrlIdentityPermission 方法的行为。此示例的最佳用途是查看方法的结果，而不是显示如何使用这些方法。
Imports System
Imports System.Security
Imports System.Security.Permissions
Imports Microsoft.VisualBasic
<Assembly: CLSCompliant(True)>
Public Class UrlIdentityPermissionDemo
Private Function IsSubsetOfDemo() As Boolean
Dim returnValue As Boolean = True
Dim url1 As String = ""
Dim url2 As String = ""
Dim urlIdPerm1, urlIdPerm2 As UrlIdentityPermission
Dim urlGen1 As New UrlGenerator()
Dim urlGen2 As New UrlGenerator()
urlGen1.ResetIndex()
While urlGen1.CreateUrl(url1)
urlIdPerm1 = New UrlIdentityPermission(url1)
urlGen2.ResetIndex()
Console.WriteLine("********************************************************\n")
While urlGen2.CreateUrl(url2)
urlIdPerm2 = New UrlIdentityPermission(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 As String = ""
Dim 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(url1)
urlIdPerm1 = New UrlIdentityPermission(url1)
Console.WriteLine("**********************************************************" & ControlChars.Lf)
urlGen2.ResetIndex()
While urlGen2.CreateUrl(url2)
Try
urlIdPerm2 = New UrlIdentityPermission(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)
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
'Expected exception.
Console.WriteLine("An exception was thrown for union :" & e.ToString())
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 As String = ""
Dim url2 As String = ""
Dim urlIdPerm1, urlIdPerm2, urlIdPerm3 As UrlIdentityPermission
Dim urlGen1 As New UrlGenerator()
Dim urlGen2 As New UrlGenerator()
urlGen1.ResetIndex()
While urlGen1.CreateUrl(url1)
urlIdPerm1 = New UrlIdentityPermission(url1)
Console.WriteLine("**********************************************************" & ControlChars.Lf)
urlGen2.ResetIndex()
Console.WriteLine("********************************************************\n")
While urlGen2.CreateUrl(url2)
urlIdPerm2 = New UrlIdentityPermission(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)
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 url2 As String = ""
Dim urlIdPerm1, urlIdPerm2 As UrlIdentityPermission
Dim urlGen1 As New UrlGenerator()
Dim urlGen2 As New UrlGenerator()
urlGen1.ResetIndex()
While urlGen1.CreateUrl(url1)
urlIdPerm1 = New UrlIdentityPermission(url1)
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(url1)
urlIdPerm1 = New UrlIdentityPermission(url1)
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() = {"https://www.fourthcoffee.com/process/grind.htm", "https://www.fourthcoffee.com/process/*", "https://www.fourthcoffee.com/*", "https://www.fourthcoffee.com/process/*", "https://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 url As String) As Boolean
If urlIndex = myUrl.Length Then
url = ""
urlIndex &= 1
Return True
End If
If urlIndex > myUrl.Length Then
url = ""
Return False
End If
url = myUrl(urlIndex)
urlIndex = urlIndex + 1
Return True
End Function 'CreateUrl
' End of UrlGenerator.
using System;
using System.Security;
using System.Security.Permissions;
public class UrlIdentityPermissionDemo
{
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 url1))
{
urlIdPerm1 = new UrlIdentityPermission(url1);
Console.WriteLine("********************************************************\n");
while (urlGen2.CreateUrl(out url2))
{
urlIdPerm2 = new UrlIdentityPermission(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 url1))
{
urlIdPerm1 = new UrlIdentityPermission(url1);
Console.WriteLine("**********************************************************\n");
urlGen2.ResetIndex();
while (urlGen2.CreateUrl(out url2))
{
try
{
urlIdPerm2 = new UrlIdentityPermission(url2);
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)
{ //Expected exception.
Console.WriteLine("An exception was thrown for union :" + e.Message);
}
}
}
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 url1))
{
urlIdPerm1 = new UrlIdentityPermission(url1);
Console.WriteLine("**********************************************************\n");
urlGen2.ResetIndex();
Console.WriteLine("********************************************************\n");
while (urlGen2.CreateUrl(out url2))
{
urlIdPerm2 = new UrlIdentityPermission(url2);
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 url1))
{
urlIdPerm1 = new UrlIdentityPermission(url1);
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 url1))
{
urlIdPerm1 = new UrlIdentityPermission(url1);
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 =
{
"https://www.fourthcoffee.com/process/grind.htm","https://www.fourthcoffee.com/process/*",
"https://www.fourthcoffee.com/*","https://www.fourthcoffee.com/process/*","https://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 string url)
{
if (urlIndex == myUrl.Length)
{
url = "";
urlIndex++;
return true;
}
if (urlIndex > myUrl.Length)
{
url = "";
return false;
}
url = myUrl[urlIndex++];
return true;
}
} // End of UrlGenerator.
// This sample demonstrates the IsSubsetOf, Union, Intersect,
// Copy, ToXml and FromXml methods
// of the UrlIdentityPermission class.
import System.*;
import System.Security.*;
import System.Security.Permissions.*;
/** @assembly CLSCompliant(true)
*/
public class UrlIdentityPermissionDemo
{
// IsSubsetOf determines whether the current permission is a
// subset of the specified permission.
private boolean IsSubsetOfDemo()
{
boolean returnValue = true;
String url1[] = new String[1];
String url2[] = new String[1];
UrlIdentityPermission urlIdPerm1[] = new UrlIdentityPermission[1];
UrlIdentityPermission urlIdPerm2[] = new UrlIdentityPermission[1];
UrlGenerator urlGen1 = new UrlGenerator();
UrlGenerator urlGen2 = new UrlGenerator();
urlGen1.ResetIndex();
while (urlGen1.CreateUrl(urlIdPerm1, url1)) {
if (urlIdPerm1 == null) {
continue;
}
urlGen2.ResetIndex();
Console.WriteLine("******************************************"
+ "**************\n");
while (urlGen2.CreateUrl(urlIdPerm2, url2)) {
System.String firstPermission = (url1[0].Equals("")
|| url1[0] == null) ? "null" : url1[0];
System.String secondPermission = (url2[0].Equals("")
|| url2[0] == null) ? "null" : url2[0];
if (urlIdPerm2 == null) {
continue;
}
try {
if (urlIdPerm1[0].IsSubsetOf(urlIdPerm2[0])) {
Console.WriteLine((firstPermission
+ "\n is a subset of " + secondPermission + "\n"));
}
else {
Console.WriteLine((firstPermission
+ "\n is not a subset of " + secondPermission
+ "\n"));
}
}
catch (System.Exception e) {
Console.WriteLine(("An exception was thrown for subset :"
+ url1 == "") ? "null." : (url1 + "\n"
+ url2 == "") ? "null." : url2 + "\n" + e);
}
}
}
return returnValue;
} //IsSubsetOfDemo
// Union creates a new permission that is the union
// of the current permission and
// the specified permission.
private boolean UnionDemo()
{
boolean returnValue = true;
String url1[] = new String[1];
String url2[] = new String[1];
UrlIdentityPermission urlIdPerm1[] = new UrlIdentityPermission[1];
UrlIdentityPermission urlIdPerm2[] = new UrlIdentityPermission[1];
IPermission urlIdPerm3;
UrlGenerator urlGen1 = new UrlGenerator();
UrlGenerator urlGen2 = new UrlGenerator();
urlGen1.ResetIndex();
while (urlGen1.CreateUrl(urlIdPerm1, url1)) {
if (urlIdPerm1 == null) {
continue;
}
Console.WriteLine("******************************************"
+ "****************\n");
urlGen2.ResetIndex();
while (urlGen2.CreateUrl(urlIdPerm2, url2)) {
try {
if (urlIdPerm2 == null) {
continue;
}
String firstPermission = (url1[0] == ""
|| url1[0] == null) ? "null" : url1[0];
String secondPermission = (url2[0] == ""
|| url2[0] == null) ? "null" : url2[0];
urlIdPerm3 = ((UrlIdentityPermission)(urlIdPerm1[0].
Union(urlIdPerm2[0])));
urlIdPerm3 = urlIdPerm1[0].Union(urlIdPerm2[0]);
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)).
get_Url().ToString()));
}
}
catch (System.Exception e) {
Console.WriteLine(("An exception was thrown for union :"
+ e));
returnValue = false;
}
}
}
return returnValue;
} //UnionDemo
// Intersect creates and returns a new permission that is
// the intersection of the
// current permission and the permission specified.
private boolean IntersectDemo()
{
boolean returnValue = true;
String url1[] = new String[1];
String url2[] = new String[1];
UrlIdentityPermission urlIdPerm1[] = new UrlIdentityPermission[1];
UrlIdentityPermission urlIdPerm2[] = new UrlIdentityPermission[1];
UrlIdentityPermission urlIdPerm3[] = new UrlIdentityPermission[1];
UrlGenerator urlGen1 = new UrlGenerator();
UrlGenerator urlGen2 = new UrlGenerator();
urlGen1.ResetIndex();
while (urlGen1.CreateUrl(urlIdPerm1, url1)) {
if (urlIdPerm1 == null) {
continue;
}
Console.WriteLine("***************************************"
+ "*******************\n");
urlGen2.ResetIndex();
Console.WriteLine("****************************************"
+ "****************\n");
while (urlGen2.CreateUrl(urlIdPerm2, url2)) {
if (urlIdPerm2 == null) {
continue;
}
String firstPermission = (url1[0] == ""
|| url1[0] == null) ? "null" : url1[0];
String secondPermission = (url2[0] == ""
|| url2[0] == null) ? "null" : url2[0];
try {
urlIdPerm3[0] = ((UrlIdentityPermission)(urlIdPerm1[0].
Intersect(urlIdPerm2[0])));
if (urlIdPerm3[0] != null && urlIdPerm3[0].
get_Url() != null) {
Console.WriteLine(("The intersection of "
+ firstPermission + " and \n\t" + secondPermission
+ " = \n\t"
+ ((UrlIdentityPermission)(urlIdPerm3[0])).
get_Url().ToString()));
}
else {
Console.WriteLine(("The intersection of "
+ firstPermission + " and \n\t"
+ secondPermission + " is nu //IntersectDemoll. "));
}
}
catch (System.Exception e) {
Console.WriteLine(("An exception was thrown "
+ "for the intersection : " + e));
returnValue = false;
}
}
}
return returnValue;
} //IntersectDemo
//Copy creates and returns an identical copy of the current permission.
private boolean CopyDemo()
{
boolean returnValue = true;
String url1[] = new String[1];
UrlIdentityPermission urlIdPerm1[] = new UrlIdentityPermission[1];
UrlIdentityPermission urlIdPerm2[] = new UrlIdentityPermission[1];
UrlGenerator urlGen1 = new UrlGenerator();
UrlGenerator urlGen2 = new UrlGenerator();
urlGen1.ResetIndex();
while (urlGen1.CreateUrl(urlIdPerm1, url1)) {
if (urlIdPerm1 == null) {
continue;
}
urlGen2.ResetIndex();
Console.WriteLine("**********************************************"
+ "**********\n");
try {
urlIdPerm2[0] = ((UrlIdentityPermission)(urlIdPerm1[0].Copy()));
if (urlIdPerm2 != null) {
Console.WriteLine(("Result of copy = " + urlIdPerm2[0].
ToString() + "\n"));
}
else {
Console.WriteLine("Result of copy is null. \n");
}
}
catch (System.Exception e) {
{
if (url1[0].Equals("")) {
Console.WriteLine("The target UrlIdentityPermission"
+ " is empty; copy failed.");
}
else {
Console.WriteLine(e);
}
}
continue;
}
}
return returnValue;
} //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 boolean ToFromXmlDemo()
{
boolean returnValue = true;
String url1[] = new String[1];
UrlIdentityPermission urlIdPerm1[] = new UrlIdentityPermission[1];
UrlIdentityPermission urlIdPerm2[] = new UrlIdentityPermission[1];
UrlGenerator urlGen1 = new UrlGenerator();
UrlGenerator urlGen2 = new UrlGenerator();
urlGen1.ResetIndex();
while (urlGen1.CreateUrl(urlIdPerm1, url1)) {
if (urlIdPerm1 == null) {
continue;
}
Console.WriteLine("********************************************"
+ "************\n");
urlGen2.ResetIndex();
try {
urlIdPerm2[0] = new UrlIdentityPermission(PermissionState.None);
urlIdPerm2[0].FromXml(urlIdPerm1[0].ToXml());
Console.WriteLine(("Result of ToFromXml = "
+ urlIdPerm2[0].ToString() + "\n"));
}
catch (System.Exception e) {
Console.WriteLine(("ToFromXml failed :"
+ urlIdPerm1.ToString() + e));
continue;
}
}
return returnValue;
} //ToFromXmlDemo
// Invoke all demos.
public boolean runDemo()
{
boolean ret = true;
boolean retTmp;
// Call IsSubsetOf demo.
retTmp = IsSubsetOfDemo();
if (retTmp) {
Console.get_Out().WriteLine("IsSubset demo completed "
+ "successfully.");
}
else {
Console.get_Out().WriteLine("IsSubset demo failed.");
}
ret = retTmp && ret;
// Call Union demo.
retTmp = UnionDemo();
if (retTmp) {
Console.get_Out().WriteLine("Union demo completed successfully.");
}
else {
Console.get_Out().WriteLine("Union demo failed.");
}
ret = retTmp && ret;
// Call Intersect demo.
retTmp = IntersectDemo();
if (retTmp) {
Console.get_Out().WriteLine("Intersect demo completed "
+ "successfully.");
}
else {
Console.get_Out().WriteLine("Intersect demo failed.");
}
ret = retTmp && ret;
// Call Copy demo.
retTmp = CopyDemo();
if (retTmp) {
Console.get_Out().WriteLine("Copy demo completed successfully.");
}
else {
Console.get_Out().WriteLine("Copy demo failed.");
}
ret = retTmp && ret;
// Call ToFromXml demo.
retTmp = ToFromXmlDemo();
if (retTmp) {
Console.get_Out().WriteLine("ToFromXml demo "
+ "completed successfully.");
}
else {
Console.get_Out().WriteLine("ToFromXml demo failed.");
}
ret = retTmp && ret;
return ret;
} //runDemo
// Test harness.
public static void main(String[] args)
{
try {
UrlIdentityPermissionDemo democase = new
UrlIdentityPermissionDemo();
boolean ret = democase.runDemo();
if (ret) {
Console.get_Out().WriteLine("UrlIdentity demo completed"
+ " successfully.");
Console.get_Out().WriteLine("Press the Enter key to exit.");
String consoleInput = Console.ReadLine();
Environment.set_ExitCode(100);
}
else {
Console.get_Out().WriteLine("UrlIdentity demo failed.");
Console.get_Out().WriteLine("Press the Enter key to exit.");
String consoleInput = Console.ReadLine();
Environment.set_ExitCode(101);
}
}
catch (System.Exception e) {
Console.get_Out().WriteLine("UrlIdentity demo failed.");
Console.WriteLine(e.ToString());
Console.get_Out().WriteLine("Press the Enter key to exit.");
String consoleInput = Console.ReadLine();
Environment.set_ExitCode(101);
}
} //main
} //UrlIdentityPermissionDemo
// This class generates UrlIdentityPermission objects.
class UrlGenerator
{
private String myUrl[] = {
"https://www.fourthcoffee.com/process/grind.htm",
"https://www.fourthcoffee.com/process/*",
"https://www.fourthcoffee.com/*",
"https://www.fourthcoffee.com/process/*",
"https://www.contoso.com/math.asmx"};
private int urlIndex = 0;
public UrlGenerator()
{
ResetIndex();
} //UrlGenerator
public void ResetIndex()
{
urlIndex = 0;
} //ResetIndex
// CreateUrl creates a UrlIdentityPermission.
public boolean CreateUrl(UrlIdentityPermission urlPerm[], String url[])
{
UrlIdentityPermission urlP = null;
if (urlIndex == myUrl.length) {
urlPerm[0] = new UrlIdentityPermission(PermissionState.None);
url[0] = "";
urlIndex++;
return true;
}
if (urlIndex > myUrl.length) {
urlPerm = null;
url[0] = "";
return false;
}
url[0] = myUrl[urlIndex++];
try {
urlP = new UrlIdentityPermission(url[0]);
urlPerm[0] = urlP;
return true;
}
catch (System.Exception e) {
Console.WriteLine(("Cannot create UrlIdentityPermission : "
+ url + " " + e));
urlPerm[0] = new UrlIdentityPermission(PermissionState.None);
url[0] = "";
return true;
}
} //CreateUrl
} //UrlGenerator
继承层次结构
System.Object
System.Security.CodeAccessPermission
System.Security.Permissions.UrlIdentityPermission
线程安全
此类型的任何公共静态（Visual Basic 中的 Shared）成员都是线程安全的，但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 2000 SP4、Windows Millennium Edition、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
请参见
参考
UrlIdentityPermission 成员
System.Security.Permissions 命名空间
UrlIdentityPermissionAttribute
Url
UrlMembershipCondition