01 .NET CORE 2.2 使用OCELOT -- 简单使用

　　目前参考两篇文章，已实现基本的ocelot的网关功能。

　　https://www.cnblogs.com/xlxr45/p/11320988.html

　　https://www.jianshu.com/p/c967eda8b04d

　　按照第一篇的操作，ocelot的网关宿主为cmd，因为本想用webapi项目引用ocelot实现网关功能，配置文件有点出入。

　　后来搜索查到第二篇。简单修改下配置，configuration.json 如下

{
  "ReRoutes": [
    {
      "DownstreamPathTemplate": "/api/customers",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 9001
        }
      ],
      "UpstreamPathTemplate": "/customers",
      "UpstreamHttpMethod": [ "Get" ]
    },
    {
      "DownstreamPathTemplate": "/api/customers/{id}",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 9001
        }
      ],
      "UpstreamPathTemplate": "/customers/{id}",
      "UpstreamHttpMethod": [ "Get" ]
    },
    {
      "DownstreamPathTemplate": "/api/products",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 9002
        }
      ],
      "UpstreamPathTemplate": "/api/products",
      "UpstreamHttpMethod": [ "Get" ]
    }
  ]
}

　　修改三个项目的启动宿主为iisexpress、端口等，并在解决方案中设置为多项目启动。

　　VS按F5启动，可以看到同时启动三个项目