Asp.net MVC WebApi Response AOP_se7en3_新浪博客-优快云博客

本文介绍了一个WebApi项目中实现JSON输出加密的方法。通过创建CryptDelegatingHandler类并继承DelegatingHandler，实现了对响应内容的加密处理。该处理依赖于配置项JsonNeedCrypt来决定是否开启加密。

WebApi项目需要在输出Json时对Json进行编码处理。考虑使用MVC 的AOP

查阅文档需要HttpMessageHandle

新建类CryptDelegatingHandler

public class CryptDelegatingHandler:DelegatingHandler
    {
        protected async override Task SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            var response = await base.SendAsync(request, cancellationToken);
            bool jsonNeedCrypt =Convert.ToBoolean(FastFoodMvcApi.Common.ConfigList.GetValueFromConfig("JsonNeedCrypt"));
            if (jsonNeedCrypt)
                response.Content =new StringContent(JsonCrypt.EncryptJsonString(response.Content.ReadAsStringAsync().Result));
            //解密测试
            //Console.Write(JsonCrypt.DecryptJsonString(response.Content.ReadAsStringAsync().Result));
            return response;
        }
    }

加入WebApiConfig中

config.MessageHandlers.Add(new CryptDelegatingHandler());

详细原理转http://www.cnblogs.com/r01cn/archive/2012/12/07/2807059.html