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";
- }
- }