WebPermission Classe

Definição

public ref class WebPermission sealed : System::Security::CodeAccessPermission, System::Security::Permissions::IUnrestrictedPermission

[System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public sealed class WebPermission : System.Security.CodeAccessPermission, System.Security.Permissions.IUnrestrictedPermission

[System.Serializable]
public sealed class WebPermission : System.Security.CodeAccessPermission, System.Security.Permissions.IUnrestrictedPermission

public sealed class WebPermission : System.Security.CodeAccessPermission, System.Security.Permissions.IUnrestrictedPermission

[<System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type WebPermission = class
    inherit CodeAccessPermission
    interface IUnrestrictedPermission

[<System.Serializable>]
type WebPermission = class
    inherit CodeAccessPermission
    interface IUnrestrictedPermission

type WebPermission = class
    inherit CodeAccessPermission
    interface IUnrestrictedPermission

Public NotInheritable Class WebPermission
Inherits CodeAccessPermission
Implements IUnrestrictedPermission

Herança

Object

CodeAccessPermission

WebPermission

Atributos

ObsoleteAttribute SerializableAttribute

Implementações

IUnrestrictedPermission

Exemplos

O exemplo a seguir demonstra como criar uma nova instância do WebPermission usando um Regex. Hosts adicionais são adicionados à lista de conexão e aceita de WebPermission. Por fim, a lista de conexão e aceita é exibida no console.

//  Create a Regex that accepts all URLs containing the host fragment www.contoso.com.
Regex^ myRegex = gcnew Regex( "http://www\\.contoso\\.com/.*" );

// Create a WebPermission that gives permissions to all the hosts containing the same host fragment.
WebPermission^ myWebPermission = gcnew WebPermission( NetworkAccess::Connect,myRegex );

//Add connect privileges for a www.adventure-works.com.
myWebPermission->AddPermission( NetworkAccess::Connect, "http://www.adventure-works.com" );

//Add accept privileges for www.alpineskihouse.com.
myWebPermission->AddPermission( NetworkAccess::Accept, "http://www.alpineskihouse.com/" );

// Check whether all callers higher in the call stack have been granted the permission.
myWebPermission->Demand();

// Get all the URIs with Connect permission.
IEnumerator^ myConnectEnum = myWebPermission->ConnectList;
Console::WriteLine( "\nThe 'URIs' with 'Connect' permission are :\n" );
while ( myConnectEnum->MoveNext() )
{
   Console::WriteLine( "\t{0}", myConnectEnum->Current );
}

// Get all the URIs with Accept permission.   
IEnumerator^ myAcceptEnum = myWebPermission->AcceptList;
Console::WriteLine( "\n\nThe 'URIs' with 'Accept' permission is :\n" );

while ( myAcceptEnum->MoveNext() )
{
   Console::WriteLine( "\t{0}", myAcceptEnum->Current );
}

   //  Create a Regex that accepts all URLs containing the host fragment www.contoso.com.
   Regex myRegex = new Regex(@"http://www\.contoso\.com/.*");

   // Create a WebPermission that gives permissions to all the hosts containing the same host fragment.
   WebPermission myWebPermission = new WebPermission(NetworkAccess.Connect,myRegex);
   
   //Add connect privileges for a www.adventure-works.com.
   myWebPermission.AddPermission(NetworkAccess.Connect,"http://www.adventure-works.com");
   
   //Add accept privileges for www.alpineskihouse.com.
   myWebPermission.AddPermission(NetworkAccess.Accept, "http://www.alpineskihouse.com/");
   
   // Check whether all callers higher in the call stack have been granted the permission.
   myWebPermission.Demand();
   
   // Get all the URIs with Connect permission.
   IEnumerator myConnectEnum = myWebPermission.ConnectList;
   Console.WriteLine("\nThe 'URIs' with 'Connect' permission are :\n");
   while (myConnectEnum.MoveNext())
   {Console.WriteLine("\t" + myConnectEnum.Current);}

   // Get all the URIs with Accept permission.	  
   IEnumerator myAcceptEnum = myWebPermission.AcceptList;
   Console.WriteLine("\n\nThe 'URIs' with 'Accept' permission is :\n");
     
   while (myAcceptEnum.MoveNext())
     {Console.WriteLine("\t" + myAcceptEnum.Current);}

  ' Create a Regex that accepts all the URLs contianing the host fragment www.contoso.com.
  Dim myRegex As New Regex("http://www\.contoso\.com/.*")
    
  ' Create a WebPermission that gives permission to all the hosts containing same host fragment.
  Dim myWebPermission As New WebPermission(NetworkAccess.Connect, myRegex)
  ' Add connect privileges for a www.adventure-works.com.
  myWebPermission.AddPermission(NetworkAccess.Connect, "http://www.adventure-works.com")
  ' Add accept privileges for www.alpineskihouse.com.
  myWebPermission.AddPermission(NetworkAccess.Accept, "http://www.alpineskihouse.com/")
  ' Check whether all callers higher in the call stack have been granted the permission.
  myWebPermission.Demand()
    
  ' Get all the URIs with Connect permission.
  Dim myConnectEnum As IEnumerator = myWebPermission.ConnectList
  Console.WriteLine(ControlChars.NewLine + "The 'URIs' with 'Connect' permission are :" + ControlChars.NewLine)
  While myConnectEnum.MoveNext()
    Console.WriteLine((ControlChars.Tab + myConnectEnum.Current.ToString()))
  End While 
  
  ' Get all the URIs with Accept permission.	  
  Dim myAcceptEnum As IEnumerator = myWebPermission.AcceptList
  Console.WriteLine(ControlChars.NewLine + ControlChars.NewLine + "The 'URIs' with 'Accept' permission is :" + ControlChars.NewLine)

  While myAcceptEnum.MoveNext()
    Console.WriteLine((ControlChars.Tab + myAcceptEnum.Current))
  End While

Comentários

WebPermission fornece um conjunto de métodos e propriedades para controlar o acesso aos recursos da Internet. Você pode usar um WebPermission para fornecer acesso restrito ou irrestrito ao recurso, com base no PermissionState que é definido quando o WebPermission é criado.

Crie uma WebPermission instância chamando seu construtor usando um dos seguintes conjuntos de parâmetros:

• Sem parâmetros. O valor padrão PermissionState é None.

• Um PermissionState. Especifique para Unrestricted permitir que qualquer URI seja usado na classe de destino ou None para permitir o acesso somente a URIs que você especificar por meio do uso do AddPermission método .

• Um NetworkAccess valor e uma cadeia de caracteres de URI. O URI especificado tem permissões concedidas pelo NetworkAccess valor .

• Uma NetworkAccess expressão regular de especificador e URI.

O ConnectList e AcceptList mantêm os URIs aos quais você concedeu permissão de acesso. Para adicionar um URI a qualquer uma dessas listas, use AddPermission. Se você passar Accept como o NetworkAccess parâmetro , o URI será adicionado ao AcceptList. WebPermission permitirá conexões com sua classe de destino com URIs correspondentes ao AcceptList.

Construtores

Propriedades

Métodos

Aplica-se a

Confira também

• CodeAccessPermission
• PermissionState
• NetworkAccess