使用c#Web Api 2,我有抛出InvalidOperationException的代码.返回状态代码302时,如何使用HandleException批注为重定向提供位置？
[HandleException(typeof(InvalidOperationException),HttpStatusCode.Found,ResponseContent = "Custom message 12")]
public IHttpActionResult GetHandleException(int num)
{
switch (num)
{
case 12: throw new InvalidOperationException("DONT SHOW invalid operation exception");
default: throw new Exception("base exception");
}
}
编辑：
对不起,我有点急忙问这个问题.上面的类使用HandleExceptionAttribute类,该类继承自ExceptionFilterAttribute.当我试图调试他们的单元测试时,我没有意识到这一点.单元测试中不会出现此问题,但使用需要重定向URL的Visual Studio .webtest会出现此问题.从ExceptionFilterAttribute继承的类未提供允许提供重定向URL的参数.对不起,问题不完整,谢谢你花时间回答.
/// <summary>
/// This attribute will handle exceptions thrown by an action method in a consistent way
/// by mapping an exception type to the desired HTTP status code in the response.
/// It may be applied multiple times to the same method.
/// </summary>
[AttributeUsage(AttributeTargets.Method,Inherited = false,AllowMultiple = true)]
public sealed class HandleExceptionAttribute : ExceptionFilterAttribute
{
解决方法
编辑：感谢您更新了问题.虽然我仍然不确定你为什么要在这个WebApi方法中重定向.希望这个答案可以提供帮助.
我将处理HandleExceptionAttribute中的所有异常逻辑.您甚至可以使用您正在寻找的302代码从那里重定向.你的HandleExceptionAttribute看起来像这样(我已经包含了3种基于异常返回结果的方法)：
public sealed class HandleExceptionAttribute : ExceptionFilterAttribute
{
public override void OnException(HttpActionExecutedContext context)
{
//TODO: we can handle all types of exceptions here. Out of memory,divide by zero,etc etc.
if (context.Exception is InvalidOperationException)
{
var httpResponseMessage = context.Request.CreateResponse(HttpStatusCode.Redirect);
httpResponseMessage.Headers.Location = new Uri("http://www.YourRedirectUrl");
throw new HttpResponseException(httpResponseMessage);
}
if (context.Exception is UnauthorizedAccessException)
{
context.Response = context.Request.CreateErrorResponse(HttpStatusCode.Unauthorized,context.Exception.Message);
return;
}
if (context.Exception is TimeoutException)
{
throw new HttpResponseException(context.Request.CreateResponse(HttpStatusCode.RequestTimeout,context.Exception.Message));
}
context.Response = context.Request.CreateErrorResponse(HttpStatusCode.InternalServerError,"Unable to process your request.");
}
}
但是,如果您真的想按照您的要求完成它,可以在GetHandleException方法中添加第二个参数.这将接收消息字符串(或URL),然后在HandleExceptionAttribute中将重定向url添加到参数(ActionArguements)：
public IHttpActionResult GetHandleException(int num,string message = "")
{
switch (num)
{
case 12: return Redirect(message); //message string would be your url
default: throw new Exception("base exception");
}
}
然后你的HandleExceptionAttribute看起来像这样：
public sealed class HandleExceptionAttribute : ExceptionFilterAttribute
{
public override void OnException(HttpActionExecutedContext context)
{
context.ActionContext.ActionArguments["message"] = "your redirect URL";
}
}
