1. Interface

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace MyServiceInterface
{
[ServiceContract]
public interface IService1
{
[OperationContract]
int Add(int Number1, int Number2);
[OperationContract]
int Sub(int Number1, int Number2);
[OperationContract]
int Mul(int Number1, int Number2);
[OperationContract]
int Div(int Number1, int Number2);
}

[ServiceContract]
public interface IService2
{

    [OperationContract]
    [WebGet(UriTemplate = "/Add/{Number1}/{Number2}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
    int AddRest(string Number1, string Number2);


    [OperationContract]
    [WebGet(UriTemplate = "/Sub/{Number1}/{Number2}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
    int SubRest(string Number1, string Number2);


    [OperationContract]
    [WebGet(UriTemplate = "/Mul/{Number1}/{Number2}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
    int MulRest(string Number1, string Number2);

    [OperationContract]
    [WebGet(UriTemplate = "/Div/{Number1}/{Number2}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
    int DivRest(string Number1, string Number2);

}

}

2. Class
   using System;
   using System.Collections.Generic;
   using System.Linq;
   using System.Runtime.Serialization;
   using System.ServiceModel;
   using System.Text;

using MyServiceInterface;

namespace WebApplicationWCF
{
public class Service1 : IService1, IService2
{

    public int Add(int Number1, int Number2)
    {
        return Number1 + Number2;
    }

    public int Sub(int Number1, int Number2)
    {
        return Number1 - Number2;
    }

    public int Mul(int Number1, int Number2)
    {
        return Number1 * Number2;
    }

    public int Div(int Number1, int Number2)
    {
        return Number1 / Number2;
    }

    public int AddRest(string Number1, string Number2)
    {
        int num1 = Convert.ToInt32(Number1);
        int num2 = Convert.ToInt32(Number2);
        return num1 + num2;
    }

    public int SubRest(string Number1, string Number2)
    {
        int num1 = Convert.ToInt32(Number1);
        int num2 = Convert.ToInt32(Number2);
        return num1 - num2;
    }

    public int MulRest(string Number1, string Number2)
    {
        int num1 = Convert.ToInt32(Number1);
        int num2 = Convert.ToInt32(Number2);
        return num1 * num2;
    }

    public int DivRest(string Number1, string Number2)
    {
        int num1 = Convert.ToInt32(Number1);
        int num2 = Convert.ToInt32(Number2);
        return num1 / num2;
    }
}

}

Server

3. Web.config

   <system.serviceModel>
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

       <endpoint name ="RESTEndPoint"
                 contract ="MyServiceInterface.IService2"
                 binding ="webHttpBinding"
                 address ="rest"
                 behaviorConfiguration ="restbehavior"/>
   
       <endpoint contract="IMetadataExchange"
                 binding="mexHttpBinding"
                 address="mex" />
     </service>
   </services>

   </system.serviceModel>

   <system.webServer>
   

   <!--
       To browse web app root directory during debugging, set the value below to true.
       Set to false before deployment to avoid disclosing web app folder information.
     -->
   <directoryBrowse enabled="true"/>

   </system.webServer>
   

Client

1. http://localhost:8000/Service1.svc/Rest/add/7/2

2. fiddler

GET http://localhost:8000/Service1.svc/Rest/add/7/2 HTTP/1.1
Host: localhost:8000
Connection: keep-alive
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Whale/1.4.64.6 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: ko-KR,ko;q=0.9,en-US;q=0.8,en;q=0.7

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