本文有改动，参考原文：https://www.cnblogs.com/liek/p/4888201.html

                                      https://www.cnblogs.com/tonykan/p/3963875.html  

功能背景：WebApi 客户端 一个Model 序列化为string类型，想将其加密之后再Post到服务端，在服务端解析出来再处理。

Jil.dll 安装：

然后： 选择项目，输入 Install-Package Jil 回车。

然后创建一个JilFormatter类，代码如下：

using Jil;using OLW.Common.Helpers;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Net.Http.Formatting;using System.Net.Http.Headers;using System.Reflection;using System.Text;using System.Threading.Tasks;using System.Web;using System.Xml.Serialization;namespace WxPayWebApi.Common{    public class JilFormatter : MediaTypeFormatter    {        private readonly Options _jilOptions;        private MethodInfo _method;        public JilFormatter()        {            //要序列化的时间格式            _jilOptions = new Options(dateFormat: DateTimeFormat.ISO8601);            //媒体类型            SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/test"));            //加入 UTF8Encoding 编码            SupportedEncodings.Add(new UTF8Encoding(encoderShouldEmitUTF8Identifier: false, throwOnInvalidBytes: true));            //加入 UnicodeEncoding 编码            SupportedEncodings.Add(new UnicodeEncoding(bigEndian: false, byteOrderMark: true, throwOnInvalidBytes: true));        }        //判断是否反序列化类型        public override bool CanReadType(Type type)        {            if (type == null)            {                throw new ArgumentNullException("type");            }            return true;        }        //判断是否序列化类型        public override bool CanWriteType(Type type)        {            if (type == null)            {                throw new ArgumentNullException("type");            }            return true;        }        //  异步反序列化一个指定类型的对象。        public override Task

 

在这里获取到 客户端传来的字符串 解密处理：

　　 private object DeserializeFromStream(Type type, Stream readStream)         {
                try             {
                    StreamReader sr = new StreamReader(readStream);                 string text = sr.ReadToEnd();                 string s = EncrypAndDecrypHelper.Decrypt(text);                 using (StringReader ssr = new StringReader(s))                 {
                        XmlSerializer xmldes = new XmlSerializer(type);                     return xmldes.Deserialize(ssr);                 }             }             catch             {
                    return null;             }         }

 WebApi配置加： GlobalConfiguration.Configuration.Formatters[0] = new JilFormatter();

public static class WebApiConfig    {        public static void Register(HttpConfiguration config)        {            // Web API 配置和服务            // 将 Web API 配置为仅使用不记名令牌身份验证。            config.SuppressDefaultHostAuthentication();            config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));            //GlobalConfiguration.Configuration.Formatters;            //config.Formatters.Clear();            //config.Formatters.Add(new CustomNamespaceXmlFormatter());            var json = GlobalConfiguration.Configuration.Formatters.JsonFormatter;            Console.WriteLine(json);            json.UseDataContractJsonSerializer = true;            var xml = GlobalConfiguration.Configuration.Formatters.XmlFormatter;            xml.UseXmlSerializer = true;            GlobalConfiguration.Configuration.Formatters[0] = new JilFormatter();            // Web API 路由            config.MapHttpAttributeRoutes();            config.Routes.MapHttpRoute(                name: "DefaultApi",                routeTemplate: "api/{controller}/{id}",                defaults: new { id = RouteParameter.Optional }            );                    }    }