每个平台都应该具备异常处理策略,此处异常处理策略只针对用户请求产生的当前线程异常,不包括异步处理时产生的未捕获异常,关于异常处理建议大家可以去看下微软企业库的 Exception Handling Application Block
AbsCommonExceptionFilterAttribute,同信息验证一样,异常也是通过Attrbute来处理
using System.Net; using System.Net.Http; using System.Web.Http.Filters; /// <summary> /// WebAPI异常响应处理 /// </summary> public abstract class AbsCommonExceptionFilterAttribute : ExceptionFilterAttribute { /// <summary> /// Raises the exception event /// </summary> /// <param name="actionExecutedContext">The context for the action.</param> public override void OnException(HttpActionExecutedContext actionExecutedContext) { string exceptionStr = string.Empty; HttpStatusCode statusCode = HttpStatusCode.InternalServerError; if (this.AllowException) {//允许在返回结果中包含异常信息 exceptionStr = this.HandleException(actionExecutedContext, ref statusCode); } //此处可以修正返回值 actionExecutedContext.Response = actionExecutedContext.Request.CreateResponse(statusCode, new StringContent(exceptionStr)); //actionExecutedContext.Response = new HttpResponseMessage(statusCode) { Content = new StringContent(exceptionStr) }; } /// <summary> /// 是否允许返回异常信息,测试环境中应当允许返回异常以辅助测试,正式环境中应禁止返回异常 /// </summary> protected abstract bool AllowException { get; } /// <summary> /// 异常处理策略 /// </summary> /// <param name="actionExecutedContext"></param> /// <param name="ex"></param> /// <returns></returns> protected virtual string HandleException(HttpActionExecutedContext actionExecutedContext, ref HttpStatusCode statusCode) { //此处可以对异常进行分类处理,修正返回的HttpStatusCode //也可以对异常进行封装或者转换,建议采用微软企业库的Exception Handling Application Block //if (actionExecutedContext.Exception is NotImplementedException) //{ // statusCode = HttpStatusCode.NotImplemented; //} return actionExecutedContext.Exception.ToString(); } }
子类例子
public class CommonExceptionFilterAttribute : AbsCommonExceptionFilterAttribute { protected override bool AllowException { get { return true; } } }
注册Attribute,在默认生成的WebApiConfig文件的Register方法中增加如下代码
config.Filters.Add(new CommonExceptionFilterAttribute());
时间: 2024-11-03 12:14:32