一日一技：ASP.NET Core Api網關Ocelot初探

概述

Ocelot面向使用.NET運行微型服務/面向服務的體系結構的人員，這些體系結構需要在系統中具有統一的入口點。特別是我想與IdentityServer參考和承載令牌輕鬆集成。Ocelot是按特定順序排列的一堆中間件。Ocelot將HttpRequest對象操作到由其配置指定的狀態，直到到達請求構建器中間件，在該中間件中它創建一個HttpRequestMessage對象，該對象用於向下遊服務發出請求。發出請求的中間件是Ocelot管道中的最後一件事。它不會調用下一個中間件。有一塊中間件可將HttpResponseMessage映射到HttpResponse對象，然後將其返回給客戶端。基本上，它具有許多其他功能。

代碼實現

1、新建api客戶端1

 

 2、新建api 網關test

 

 3、nuget安裝Ocelot

 

 

 

4、Program文件添加ConfigureAppConfiguration

 

 public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
            .ConfigureAppConfiguration(conf =>
            {
                conf.AddJsonFile("ocelot.json", false, true);
            })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }

5、Startup文件配置

  services.AddOcelot(Configuration);

 

   app.UseOcelot().Wait();

6、網關項目下添加文件ocelot.json

{
  "ReRoutes": [
    {
      "DownstreamPathTemplate": "/api/WeatherForecast/GetList",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 5000
        }
      ],
      "UpstreamPathTemplate": "/GetList",
      "UpstreamHttpMethod": [ "Get" ]
    },

    {
      "DownstreamPathTemplate": "/{everything}",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 5000
        }
      ],
      "UpstreamPathTemplate": "/{everything}",
      "UpstreamHttpMethod": [ "Post" ]
    },
    {
      "DownstreamPathTemplate": "/api/WeatherForecast/GetModel?id={s1}",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 5000
        }
      ],
      "UpstreamPathTemplate": "/GetModel?id={s1}",
      "UpstreamHttpMethod": [ "Get" ]
    }
  ]
}

7、2個項目運行，測試

 

 

代碼地址

https://gitee.com/conanOpenSource_admin/Example/commit/b3b5a6b15a060b46c5ecd2ea31f0d36791cda18c