希望 REST 服务上的 PrincipalPermission SecurityException 到 return 403，而不是 400 错误请求

Question

我有一个用 PrincipalPermission 要求装饰的 RESTful (WCF) 服务。如果用户不担任该角色，我希望得到 403 FORBIDDEN 响应，而是得到 400 BAD REQUEST。经过反思，这是有道理的——当委托人不担任该角色时，需求会触发 SecurityException；这与通过 web.config.

中的 <authorization> 标记授予访问权限不同

但是，400 BAD REQUEST 没有意义...请求没有格式错误，我只是无权拨打电话。 400 响应意味着我可以修复请求并重试，但永远不会成功。

我如何拦截或映射 SecurityException 到更合适的响应（最好是 403 FORBIDDEN）？

修饰方法：

[PrincipalPermission(SecurityAction.Demand, Role = "FST")]
public string TestNoPermissions(string NetworkId) {
    return "Call succeeded";
}

回复：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <title>Request Error</title>
    <style>BODY { color: #000000; ...;}</style>
  </head>
  <body>
    <div id="content">
      <p class="heading1">Request Error</p>
      <p>The server encountered an error processing the request. The exception message is 'Access is denied.'. See server logs for more details. The exception stack trace is: </p>
      <p>   at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]&amp; outputs)
            at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc&amp; rpc)
            at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&amp; rpc)
            at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc&amp; rpc)
            at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)</p>
    </div>
  </body>
</html>

Answer 1

您可以使用状态代码实施 IErrorHandler to intercept the SecurityException. and then provide a WebFaultException。

public void ProvideFault(Exception error, MessageVersion version, ref Message fault)
{
    if (error is SecurityException)
    {
        var faultEx = new WebFaultException<string>("Forbidden", HttpStatusCode.Forbidden)

        fault = Message.CreateMessage(version, faultEx.CreateMessageFault(), null);
    }
}

请注意，这是未经测试的——安全异常有一个在框架/管道中迷失的坏习惯，但这个想法对于评论来说有点长。

通常您会添加带有行为的自定义 IErrorHandler，该行为可以在您的 DI 代码或配置中进行配置。

public class ErrorHandlerBehavior : IServiceBehavior
{
    public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
    {
        // not implemented
    }

    public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
        foreach (var dispatcherBase in serviceHostBase.ChannelDispatchers)
        {
            var dispatcher = dispatcherBase as ChannelDispatcher;

            if (dispatcher != null)
                dispatcher.ErrorHandlers.Add(new MyCustomErrorHandler());
        }
    }

    public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
        // not implemented
    }
}

希望 REST 服务上的 PrincipalPermission SecurityException 到 return 403，而不是 400 错误请求

Want a PrincipalPermission SecurityException on REST service to return 403, not 400 Bad Request

c#

rest

principalpermission