webapi路由

ShopController.cs

public class ShopController : ApiControllerBase
    {
        [Route("api/v1/shop/watermark")]
        [HttpPost]
        public ApiResult watermark(dynamic value)
        {
            // watermark/shopname.txt
            ApiResult parseParam = Parse<WatermarkParam>(value);
            if (!string.IsNullOrEmpty(parseParam.error))
                return parseParam;
            var request_id = parseParam.request_id;

            try
            {
                var param = (WatermarkParam)parseParam.response;
                string fileName=GetUploadPath($@"watermark\{param.watermarkfilename}");
                FileHelper.CheckDirectory(fileName);
                //var bitmap = ImageTool.Base64StringToImage(param.watermarkbase64);
                //ImageTool.WriteImage(bitmap, fileName);
                byte[] buffer=Convert.FromBase64String(param.watermarkbase64);
                ImageTool.WriteFile(buffer, fileName);
                var ack1 = ApiResult.New("", "", request_id, "");
                return ack1;
            }
            catch (Exception ex)
            {
                return ApiResult.New("error", ex.ToString(), request_id, "");
            }

        }

        class WatermarkParam : ApiParamBase
        {
            public string watermarkfilename;
            public string watermarkbase64;
        }
    }

ApiControllerBase.cs

    public class ApiControllerBase : ApiController
    {
        public const string SecretKey = "1z56'uTU;L.XWtPrkYfn>CRJ2BAV7<$dy!Go=:h+j*cNl~@}{,";
        public ApiResult Parse<T>(object value) where T : ApiParamBase, new()
        {
            try
            {
                var json = JsonConvert.SerializeObject(value);
                T param = Newtonsoft.Json.JsonConvert.DeserializeObject<T>(json);
                string sign = EncryptTool.md5($"{param.timestamp}{SecretKey}");
                if (sign != param.sign)
                {
                    return ApiResult.New("sign_error", "sign_error", ApiResult.NewGuid(), "");
                }
                return ApiResult.New("", "", ApiResult.NewGuid(), param);
            }
            catch (Exception ex)
            {
                return ApiResult.New("param_error", "param_error", ApiResult.NewGuid(), "");
            }

        }

        public string ToJson(object obj)
        {
            string json = JsonConvert.SerializeObject(obj);
            return json;
        }

        public string GetUploadPath(string path)
        {
            var savepath = System.Configuration.ConfigurationManager.AppSettings["savepath"];
            var fileName = Path.Combine(savepath, path);
            return fileName;
        }
    }

ApiParamBase.cs

    public class ApiParamBase
    {
        public ulong timestamp;
        public string sign;
    }

ApiResult.cs

public class ApiResult
    {
        public static string NewGuid()
        {
            return Guid.NewGuid().ToString();
        }
        public static ApiResult New(string error, string message, string request_id, object response)
        {
            var ret = new ApiResult(error, message, request_id, response);
            return ret;
        }

        public ApiResult(string error, string message, string request_id, object response)
        {
            this.error = error;
            this.message = message;
            this.request_id = request_id;
            this.response = response;
        }

        /// <summary>
        /// 对应错误编码
        /// </summary>
        public string error { get; set; }
        /// <summary>
        /// 错误详细信息
        /// </summary>
        public string message { get; set; }
        /// <summary>
        /// 请求ID，用GUID去掉-表示
        /// </summary>
        public string request_id { get; set; }

        /// <summary>
        /// 响应内容
        /// </summary>
        public object response { get; set; }



    }

参考：

http://www.wisestudy.cn/article/webapi_post_put_delete.html

https://zhuanlan.zhihu.com/p/31279568?utm_id=0

https://blog.csdn.net/u013934107/article/details/136104537

https://blog.csdn.net/zgscwxd/article/details/133823295

https://blog.csdn.net/m0_46635910/article/details/128322556

https://blog.csdn.net/qq_43544461/article/details/130762168

https://www.cnblogs.com/landeanfen/p/5337072.html#_label1_0