public class BaseApiController : ApiController
    {
        public class ViewModel
        {
            public string Content { get; set; }
            public object JsonObject { get; set; }
            public bool Success = true;
        }

        protected bool IsView;
        private const string ViewQuerystring = "?v";
        public ViewModel ResultModel;
        private const string CheckToken = "CheckToken";
        private const string Token = "49BBD022-CDBF-4F94-80E4-5BCACB1192EC";
        private bool _checkStatus;

        public override Task<HttpResponseMessage> ExecuteAsync(HttpControllerContext controllerContext, CancellationToken cancellationToken)
        {
            //驗證token
            if (controllerContext.Request.Headers != null && controllerContext.Request.Headers.Contains(CheckToken))
            {
                var requestToken = controllerContext.Request.Headers.GetValues(CheckToken).FirstOrDefault();
                if (requestToken != null && requestToken.Equals(Token))
                {
                    this._checkStatus = true;
                }
            }

            if (!_checkStatus)
            {
                var checkResult = new Task<HttpResponseMessage>(() => new HttpResponseMessage
                {
                    Content = new StringContent("非法訪問，缺少token", Encoding.UTF8, "text/plain")
                }, cancellationToken);

                checkResult.Start();
                return checkResult;
            }

            if (controllerContext.Request.RequestUri.Query.Equals(ViewQuerystring))
                this.IsView = true;

            base.ExecuteAsync(controllerContext, cancellationToken);

            //text模式
            if (this.IsView)
            {
                var textResult = new Task<HttpResponseMessage>(() => new HttpResponseMessage
                {
                    Content = new StringContent(this.ResultModel.Content, Encoding.UTF8, "text/plain")
                }, cancellationToken);

                textResult.Start();
                return textResult;
            }

            //json模式
            var resultData = new Result<object>
            {
                Data = this.ResultModel.JsonObject,
                Type = this.ResultModel.Success ? ResultType.Successfully : ResultType.Failure
            };

            var jsonResult = new Task<HttpResponseMessage>(() => new HttpResponseMessage
            {
                Content = new ObjectContent(typeof(Result), resultData, new JsonMediaTypeFormatter(), "application/json")
            }, cancellationToken);

            jsonResult.Start();

            return jsonResult;
        }
    }