{
  "Routes": [
    {
      "DownstreamPathTemplate": "/api/values",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 9001
        }
      ],
      "UpstreamPathTemplate": "/customers",
      "UpstreamHttpMethod": [ "Get" ],
      "RateLimitOptions": {
        //客戶端白名單。名單中的客戶端不會被限流。
        "ClientWhitelist": [],
        //是否啟用限流。
        "EnableRateLimiting": true,
        //限流時間（1s，5m，1h，1d）。在限流時間內(nèi)限制請求數(shù)，需要等PeriodTimespan時間過去了，才能再次發(fā)起請求。
        "Period": "1s",
        //限流時間間隔，限流后多少秒后才可以再次發(fā)起請求。
        "PeriodTimespan": 3,
        //限制請求數(shù)。
        "Limit": 1
      }
    }
  ],
  //全局配置，所有下游服務(wù)都執(zhí)行如下限流配置
  "GlobalConfiguration": {
    "RequestIdKey": "OcRequestId",
    "AdministrationPath": "/administration",
    "RateLimitOptions": {
      //是否禁用X-Rate-Limit和Retry-After標(biāo)頭。
      "DisableRateLimitHeaders": false,
      //限流返回的消息。
      "QuotaExceededMessage": "Customize Tips!"
    }
  }
}

public class Startup
{
    public Startup(IWebHostEnvironment env)
    {
        var builder = new Microsoft.Extensions.Configuration.ConfigurationBuilder();
        builder.SetBasePath(env.ContentRootPath)
                .AddJsonFile("appsettings.json")
                //add configuration.json
                .AddJsonFile("configuration.json", optional: false, reloadOnChange: true)
                .AddEnvironmentVariables();

        Configuration = builder.Build();
    }

    public IConfigurationRoot Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
        //輸出Logging信息；
        services.AddLogging(logging =>
        {
            logging.AddConsole();
            logging.AddDebug();
        });
        //添加Ocelot服務(wù)；
        services.AddOcelot(Configuration);
    }

    public void Configure(IApplicationBuilder app)
    {
        //使用Ocelot；
        app.UseOcelot().Wait();
    }
}

[Route("api/[controller]")]
public class ValuesController : Controller
{
    // GET api/values
    [HttpGet]
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    }
}