404未找到 - 使用angularjs使用Web API

I have my controller code:

我有我的控制器代码:

 [HttpGet]
    [ActionName("Email")]
    public HttpResponseMessage GetByEmail(string email)
    {
        Users user = db.Users.Find(email);
        if (user == null)
        {
            throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotFound));
        }
        return Request.CreateResponse(HttpStatusCode.OK, user);
    }
 [Htt