所以我最近在ExceptionFilter构建了它处理除 Api 错误之外的所有错误。ExceptionFilter如下所示:
public class ExceptionAttribute : IExceptionFilter
{
/// <summary>
/// Handles any exception
/// </summary>
/// <param name="filterContext">The current context</param>
public void OnException(ExceptionContext filterContext)
{
// If our exception has been handled, exit the function
if (filterContext.ExceptionHandled)
return;
// If our exception is not an ApiException
if (!(filterContext.Exception is ApiException))
{
// Set our base status code
var statusCode = (int)HttpStatusCode.InternalServerError;
// If our exception is an http exception
if (filterContext.Exception is HttpException)
{
// Cast our exception as an HttpException
var exception = (HttpException)filterContext.Exception;
// Get our real status code
statusCode = exception.GetHttpCode();
}
// Set our context result
var result = CreateActionResult(filterContext, statusCode);
// Set our handled property to true
filterContext.ExceptionHandled = true;
}
}
/// <summary>
/// Creats an action result from the status code
/// </summary>
/// <param name="filterContext">The current context</param>
/// <param name="statusCode">The status code of the error</param>
/// <returns></returns>
protected virtual ActionResult CreateActionResult(ExceptionContext filterContext, int statusCode)
{
// Create our context
var context = new ControllerContext(filterContext.RequestContext, filterContext.Controller);
var statusCodeName = ((HttpStatusCode)statusCode).ToString();
// Create our route
var controller = (string)filterContext.RouteData.Values["controller"];
var action = (string)filterContext.RouteData.Values["action"];
var model = new HandleErrorInfo(filterContext.Exception, controller, action);
// Create our result
var view = SelectFirstView(context, string.Format("~/Views/Error/{0}.cshtml", statusCodeName), "~/Views/Error/Index.cshtml", statusCodeName);
var result = new ViewResult { ViewName = view, ViewData = new ViewDataDictionary<HandleErrorInfo>(model) };
// Return our result
return result;
}
/// <summary>
/// Gets the first view name that matches the supplied names
/// </summary>
/// <param name="context">The current context</param>
/// <param name="viewNames">A list of view names</param>
/// <returns></returns>
protected string SelectFirstView(ControllerContext context, params string[] viewNames)
{
return viewNames.First(view => ViewExists(context, view));
}
/// <summary>
/// Checks to see if a view exists
/// </summary>
/// <param name="context">The current context</param>
/// <param name="name">The name of the view to check</param>
/// <returns></returns>
protected bool ViewExists(ControllerContext context, string name)
{
var result = ViewEngines.Engines.FindView(context, name, null);
return result.View != null;
}
}
如您所见,如果错误不是ApiException ,那么我将用户路由到错误控制器。ApiException只是我从 MVC 中进行 API 调用时发生的错误。当这些错误发生时,我想将错误作为 JSON 返回给客户端,以便 JavaScript 可以处理它。
我认为不处理错误会这样做,但它会生成一个服务器错误(尽管其中包含 JSON 错误),如下所示:
“/”应用程序中的服务器错误。
{"message":"validateMove 验证失败:\r\n项目已发送,无法移动"}
说明:执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。
异常详细信息: SapphirePlus.Web.ApiException: {"message":"validateMove 验证失败:\r\n项目已发送,无法移动"}
源错误:
第 181 行:如果 (response.StatusCode != HttpStatusCode.OK)
第 182 行:抛出新的 ApiException(result);
所以我的问题是,我可以获取Application_Error方法来获取ARE ApiException的错误并将错误作为 JSON 返回吗?