WebAPI 过滤器拦截处理以及异常捕获

对action进行拦截处理

 public class UserAuthorizeAttribute : ActionFilterAttribute
    {
        /// <summary>
        /// CC调用的Token
        /// </summary>
        //private static readonly string CCToken = ConfigurationManager.AppSettings["CCToken"].ToString();

        /// <summary>
        /// WebApi请求监听
        /// </summary>
        /// <param name="actionContext"></param>
        public override void OnActionExecuting(HttpActionContext oHttpActionContext)
        {
            string actionName = oHttpActionContext.ControllerContext.RouteData.Values["action"].ToString();
            if (actionName == "Login" || actionName == "PostSendSMS")
            {
                return;
            }
            HttpContextBase oHttpContextBase = (HttpContextBase)oHttpActionContext.Request.Properties["MS_HttpContext"]; //获取传统context     

            string sToken = oHttpContextBase.Request.Form["Token"]; //先从post里面查

            if (string.IsNullOrEmpty(sToken))
                sToken = oHttpContextBase.Request.QueryString["Token"]; //再从get里面查

            //1.验证Token
            if (string.IsNullOrEmpty(sToken))
            {
                HttpResponseMessage oHttpResponseMessage = new HttpResponseMessage();
                oHttpResponseMessage.Content = new StringContent("{‘Flag‘:false,‘Message‘:‘Token为空‘,‘ResultObj‘:null,‘Code‘:‘9101‘}", Encoding.UTF8, "application/json");

                throw new HttpResponseException(oHttpResponseMessage);
            }
            string CCToken = ConfigurationManager.AppSettings["CCToken"].ToString();
            if (sToken == CCToken)
            {
                return;
            }
            LoginInfoBiz loginBiz = new LoginInfoBiz();
            E_LoginInfo value = loginBiz.GetToken(sToken);
            if (value == null)
            {
                HttpResponseMessage oHttpResponseMessage = new HttpResponseMessage();
                oHttpResponseMessage.Content = new StringContent("{‘Flag‘:false,‘Message‘:‘Token失效‘,‘ResultObj‘:null,‘Code‘:‘9101‘}", Encoding.UTF8, "application/json");

                throw new HttpResponseException(oHttpResponseMessage);
            }
            oHttpActionContext.ControllerContext.Request.Properties.Add("ITCode", value.EngCode);

        }

    }

ajax调用的时候在error中进行异常捕获，就会获取拦截器里抛出的异常信息

  function ApiTest() {
            $("#result").html("");
            $.ajax({
                type: $("#type").val(),
                dataType: "json",
                url: $("#url").val(),
                data: eval("(" + $("#data").val() + ")"),
                success: function (results) {
                    if (typeof results == "object") {
                        $("#result").html(JSON.stringify(results));
                    }
                    else {
                        var resultObj = JSON.parse(results);
                        $("#result").html(results);
                    }
                    //使用时，需要转换为Json对象

                },
                error: function (XMLHttpRequest, textStatus, errorThrown) {
                    alert(XMLHttpRequest.responseText);
                }
            });
        }