学习json-rpc

最近做一个和SmartHome相关的项目，文档不全不说，连个像样的Demo都没，痛苦！！当然，这是题外话。今天来说说项目中主要用到的通讯协议：json-rpc，简单地说，它是以json格式进行的远程调用，是一种比xml-rpc更lightweight的协议，具体的介绍可参考json-rpc官网和Wiki。这里参考了Jayrock: JSON and JSON-RPC for .NET 也使用Jayrock来说说json-rpc的应用。

1.准备工作

首先，添加引用，先通过Nuget获取Json.net，然后引用Jayrock.dll和Jayrock.Json.dll

建立一些Model，这个根据实际情况来创建。我这里服务器用户登录需要的json的格式，例如：

{"method":"Login","params":{"username":"test2014","password":"test2014"}}

我们这里创建这么几个实体：

#region Login

    public class LoginModel

    {

        public string method { get; set; }

        public LoginParams _params { get; set; }

    }

    public class LoginParams

    {

        public string username { get; set; }

        public string password { get; set; }

    }

    public class LoginReturnModel

    {

        public string result { get; set; }

        public string info { get; set; }

    }

    #endregion

    #region GetDeviceInfo

    public class GetDeviceInfoModel

    {

        public string method { get; set; }

        public GetDeviceInfoParams _params { get; set; }

    }

    public class GetDeviceInfoParams

    {

    }

    public class GetDeviceInfoReturnModel

    {

        public string result { get; set; }

        public GetDiveInfoReturnInfo[] info { get; set; }

    }

    public class GetDiveInfoReturnInfo

    {

        public string deviceid { get; set; }

        public string deviceno { get; set; }

        public string identify { get; set; }

        public string lable { get; set; }

    }

    #endregion

2.准备页面和处理程序

创建HtmlPage1.html页面：

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title></title>

    <script src="js/json.js"></script>

    <script type="text/javascript" src="Handler.ashx?proxy"></script>

    <script type="text/javascript">

        window.onload = function () {

            var s = new Handler();

            s.Login('test2014@99guard.com', 'test2014');

            alert(s.GetDeviceInfo());

        }

    </script>

</head>

<body>

</body>

</html>

创建Handler.ashx：

using Jayrock.JsonRpc;

using Jayrock.JsonRpc.Web;

using Newtonsoft.Json;

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Net;

using System.Text;

using System.Web;

namespace JsonRpcTest3

{

    /// <summary>

    /// Handler 的摘要说明

    /// </summary>

    public class Handler : JsonRpcHandler

    {

        string requestUri;

        string requestMethod;

        string contentType;

        public Handler()

        {

            requestUri = "http://u.99guard.com:8080/homehand_spring_6/ziga8/usss.do";

            requestMethod = "POST";

            contentType = "application/json-rpc";

        }

        [JsonRpcMethod(Name="Login")]

        public bool Login(string username, string password)

        {

            string result;

            LoginParams lp = new LoginParams();

            lp.username = username;

            lp.password = password;

            LoginModel lm = new LoginModel();

            lm.method = "Login";

            lm._params = lp;

            string jsonData = JsonConvert.SerializeObject(lm).Replace("_params", "params");

            byte[] bytes = Encoding.UTF8.GetBytes(jsonData+" ");

            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(requestUri);

            request.Method = requestMethod;

            request.ContentType = contentType;

            request.ContentLength = bytes.Length;

            Stream requestStream = request.GetRequestStream();

            requestStream.Write(bytes, , bytes.Length);

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            using (Stream s = response.GetResponseStream())

            {

                using (StreamReader sr = new StreamReader(s,Encoding.UTF8))

                {

                    result = sr.ReadToEnd();

                }

            }

            LoginReturnModel lrm = JsonConvert.DeserializeObject<LoginReturnModel>(result);

            bool status = lrm.result == "" ? true : false;

            if (status)

            {

                StoreSession(response.Headers["Set-Cookie"]);

            }

            return status;

        }

        [JsonRpcMethod(Name = "GetDeviceInfo")]

        public string GetDeviceInfo()

        {

            string sessonId = File.ReadAllText(@"d:\1.txt");

            string result;

            GetDeviceInfoModel model = new GetDeviceInfoModel();

            model.method = "GetDeviceInfo";

            model._params = new GetDeviceInfoParams();

            string jsonData = JsonConvert.SerializeObject(model).Replace("_params", "params");

            byte[] bytes = Encoding.UTF8.GetBytes(jsonData + " ");

            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(requestUri);

            request.Method = requestMethod;

            request.ContentType = contentType;

            request.ContentLength = bytes.Length;

            request.Headers.Add("Cookie", sessonId);

            Stream requestStream = request.GetRequestStream();

            requestStream.Write(bytes, , bytes.Length);

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            using (Stream s = response.GetResponseStream())

            {

                using (StreamReader sr = new StreamReader(s, Encoding.UTF8))

                {

                    result = sr.ReadToEnd();

                }

            }

            GetDeviceInfoReturnModel returnModel = JsonConvert.DeserializeObject<GetDeviceInfoReturnModel>(result);

            return JsonConvert.SerializeObject(returnModel);

        }

        public void StoreSession(string session)

        {

            if (!string.IsNullOrEmpty(session))

            {

                File.WriteAllText(@"d:\1.txt", session);

            }

        }

    }

}

运行结果：

学习json-rpc

1.准备工作

2.准备页面和处理程序

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