Aspnet Core 对 Resetful API版本的支持

在实际项目过程中API往往会收到迭代的影响，同时具备多个版本，因此resetful接口的版本话是非常重要的。

其实官方就提供了很好的支持，微软爸爸在nuget提供了Microsoft.AspNetCore.Mvc.Versioning 2.3.0

该包还具有很多其他的功能，具体细节请移步官方的github

废话不多，直接上步骤

1. Nuget安装 Microsoft.AspNetCore.Mvc.Versioning.
2. 在startup.cs中做如下配置
   

   public void ConfigureServices(IServiceCollection services)
           {
               services.AddMvc();
               services.AddApiVersioning(o => o.ApiVersionReader = new HeaderApiVersionReader("api-version"));
           }
   

   　　

3. 加入Controller内的配置

   using Microsoft.AspNetCore.Mvc.Versioning;
   namespace Product.CommandService.Controllers.Product.V1
   {
     [ApiVersion("1.0")]
     [Produces("application/json")]
     [Route("api/Product")]
     public class ProductController : Controller
     {
     }
   }
   
   namespace Product.CommandService.Controllers.Product.V2
   {
     [ApiVersion("2.0")]
     [Produces("application/json")]
     [Route("api/Product")]
     public class ProductController : Controller
     {
     }
   }
   

   　　

4. 如果你不希望有些接口使用API Version
   
   

   [ApiVersionNeutral]
   [Route("api/optout")]
   public class OptOutControler : Controller
   {
       [HttpGet]
       public string Get() => HttpContext.GetRequestedApiVersion().ToString();
   }
   

   　　

   
   
5. 之后客户端访问的时候都需要在头部加入api-version,如nodejs实例代码
   

   var http = require("http");
   
   var options = {
     "method": "GET",
     "hostname": [
       "localhost"
     ],
     "port": "5000",
     "path": [
       "ioc",
       "showmodule"
     ],
     "headers": {
       "api-version": "1.0",
       "Cache-Control": "no-cache",
       "Postman-Token": "2286a575-559d-4789-8056-eb26223f6fa4"
     }
   };
   
   var req = http.request(options, function (res) {
     var chunks = [];
   
     res.on("data", function (chunk) {
       chunks.push(chunk);
     });
   
     res.on("end", function () {
       var body = Buffer.concat(chunks);
       console.log(body.toString());
     });
   });
   
   req.end();