c#：使用Owin创建WebAPI

Owin简介

open web Interface for doNet,在doNet Web服务器和doNet Web应用之间定义了一套标准的接口，其目的是为了实现服务器和应用之间的解耦，不再依赖于Windows和IIS

一、Owin使用

1.创建控制台项目
2.NuGet添加Microsoft.AspNet.WebApi.Owin和Microsoft.Aspnet.WebApi.OwinSelfHost
3.添加Startup类

1.1、Startup

Startup是OWIN约定的，用于对OWIN做相关配置，代码如下：

using Owin;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web.Http;

namespace OwinTest{
    public class Startup{
        public void Configuration(IAppBuilder appBuilder){
            //创建Web API 的配置
            var config = new HttpConfiguration();
            //启动标记路由
            config.MapHttpAttributeRoutes();
            config.Routes.MapHttpRoute(
                name:"DefaultApi",
                routeTemplate:"api/{controller}/{id}"
            );
            //将路有配置附加到appBuilder
            appBuilder.UseWebApi(config);
        }
    }
}

1.2、Controllers类

新建一个queryController类，代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web.Http;

namespace OwinTest{
    public class queryController:ApiController{
        //get api
        public string Get(string id)
        {
            return id;
        }
        // POST api
         public string Post([FromBody] string value)
        {
            return value;
        }
        // PUT api
        public void Put(int id, string value)
        {
        }
        // DELETE api
        public void Delete(int id)
        {
        }
    }
}

自建一个PersonController类，代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Http;

namespance OwinTest{
    public class PersonController:ApiController{
        Person[] personList = new Person[] {
            new Person { Id= 1,Age = 2,Name="DANNY"},
            new Person { Id = 2,Age = 3,Name = "Danny123"},
            new Person { Id =3,Age = 4,Name = "dANNY456"}
        };
        
        [HttpGet]
        [Route("api/person/getAll")]
        public List<Person> GetListAll(){
            return personList.toList();
        }
        
        public List<Person> Get(string id){
            return personList.toList();
        }
    }
}

1.3、启动WebAPI服务

Program代码如下,启动项目：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Http;

class Program
    {
        static void Main(string[] args)
        {
            string baseAddress = "http://localhost:9000/";
            using (Microsoft.Owin.Hosting.WebApp.Start<Startup>(url: baseAddress))
            {
                HttpClient client = new HttpClient();
                Console.WriteLine(baseAddress);
                Console.ReadLine();
            }
        }
    }

二、PostMan接口测试

2.1、自定义Route

调用PersonController的GetListAll方法

Get http://localhost:9000/api/person/getAll

调用PersonController的Get方法(其中ok只是参数)

Get http://localhost:9000/api/Person/ok

调用queryController的Get方法

Get http://localhost:9000/api/query/abc

调用queryController的Post方法

Post http://localhost:9000/api/query
以下分别是string和Pserson的参数传入：

string

stringdemo

Person

{
    "Id":1,
    "Name":"Danny",
    "Age":18
}

public class Person{
    public int Id{set;get;}
    public string Name{get;set;}
    public int Aget{set;get;}
}

三、参考

https://www.cnblogs.com/xishuai/p/aspnet_mvc_web_api_httpclient_json_frombody_post.html
http://www.cnblogs.com/dudu/archive/2012/05/11/asp_net_webapi_httpclient.html
https://www.cnblogs.com/webenh/p/8979510.html