.NET RESTful Web Services入门

　　很早之前看到过RESTful Web Services，并未在意，也没找相关资料进行学习。今天偶尔有一机会，就找了点资料进行研究，发现RESTful真是“简约而不简单”。下面用示例来说明：

1 项目结构

2 REST 服务接口定义

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Web;
namespace Jack_Restful_Service
{

    [ServiceContract(Name = "RestfulService",Namespace="http://www.cnblogs.com/isaboy")]
    public interface IRestDemoServices
    {
        [OperationContract]
        [WebGet(UriTemplate = Routing.GetClientRoute, BodyStyle = WebMessageBodyStyle.Bare)]
        string GetClientNameById(string Id);

        [OperationContract]
        [WebGet(UriTemplate = Routing.AddClientRoute, BodyStyle = WebMessageBodyStyle.Bare)]
        string Add(string a, string b);
        //error
        //string Add(int a, int b);

        [OperationContract]
        [WebGet(UriTemplate = Routing.LoginClientRoute, BodyStyle = WebMessageBodyStyle.Bare)]
        string Login(string uname, string upwd);

        //post 
        [OperationContract]
        [WebInvoke(RequestFormat = WebMessageFormat.Json,
        ResponseFormat = WebMessageFormat.Json,
        BodyStyle = WebMessageBodyStyle.Bare,
        Method = "POST", UriTemplate = "/Client/UpdateUser/{uname}")]
        User UpdateUser(string uname, User newUser);

    }
    //URI路由
    public static class Routing
    {
        public const string GetClientRoute = "/Client/{id}";

        public const string AddClientRoute = "/Client/{a},{b}";
        //{uname}里面的参数名称要和string Login(string uname, string upwd);一致
        public const string LoginClientRoute = "/Client/{uname}__{upwd}";
    }


}

3 REST服务接口实现

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Activation;
namespace Jack_Restful_Service
{

    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single,
        ConcurrencyMode = ConcurrencyMode.Single,
        IncludeExceptionDetailInFaults = true,
        Namespace = "http://www.cnblogs.com/isaboy")]
    [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class RestDemoServices : IRestDemoServices
    {
        //GET
        public string GetClientNameById(string Id)
        {
            string ReturnString = "Your id is: " + Id;

            return ReturnString;
        }

        public string Add(string a, string b)
        {
            int sum = int.Parse(a) + int.Parse(b);
            return sum.ToString();
        }

        public string Login(string uname, string upwd)
        {
            if (uname == "admin" && upwd == "admin")
            {
                return "success";
            }
            else
            {
                return "false";
            }
        }
        //POST
        public User UpdateUser(string uname, User newUser)
        {
            return newUser;
        }
    }

}

4 将服务HOST

 Console.WriteLine("----------Restful Service Start--------------");
 RestDemoServices demoServices = new RestDemoServices();
 WebServiceHost _serviceHost = new WebServiceHost(demoServices, new Uri("http://localhost:8000/RestfulService"));
  _serviceHost.Open();
  Console.WriteLine("----------Restful Service Opened--------------");
  Console.WriteLine("http://localhost:8000/RestfulService/Client/8");
  Console.WriteLine("http://localhost:8000/RestfulService/Client/2,5");
  Console.WriteLine("http://localhost:8000/RestfulService/Client/admin__admin");

5 打开浏览器，即可进行资源访问

另外，我们可以用代码进行测试

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Net;
using System.IO;
namespace PostServiceTest
{
    class Program
    {
        static void Main(string[] args)
        {
            //get
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:8000/RestfulService/Client/8");
            WebResponse response = request.GetResponse();
            string result = new StreamReader(response.GetResponseStream()).ReadToEnd();
            Console.WriteLine(result);

            //post
            string requestData = "{"uname":"admin","upwd":"admin"}";
            byte[] data = Encoding.UTF8.GetBytes(requestData);
            request = (HttpWebRequest)WebRequest.Create("http://localhost:8000/RestfulService/Client/UpdateUser/admin");
            request.Method = "POST";
            request.ContentType = "application/json";
            Stream dataStream = request.GetRequestStream();
            dataStream.Write(data, 0, data.Length);
            dataStream.Close();

            response = request.GetResponse();
            result = new StreamReader(response.GetResponseStream()).ReadToEnd();
            Console.WriteLine(result);
            Console.ReadKey();
        }
    }
}