Ocelot路由配置路径冲突

Question

你会如何设置重新路由遵循两组相似的路由到不同的机器。请指教

Problem/Question: 冲突情况在 /customers/1 和 /customers/1/products 之间，每个人都去不同的机器。

- 机器名：customer

GET /customers
GET /customers/1
POST /customers
PUT /customers1
DELETE /customers/1

- 机器名：customerproduct

GET /customers/1/products
PUT /customers/1/products

ocelot.json

 {
  "ReRoutes": [

    {  
      "DownstreamPathTemplate": "/customers/{id}", 
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "customer",
          "Port": 80
        }
      ],
      "UpstreamPathTemplate": "/customers/{id}",
      "UpstreamHttpMethod": [ "Get", "Post", "Put", "Delete" ]
    },

    {
      "DownstreamPathTemplate": "/customers/{id}/products",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "customerproduct",
          "Port": 80
        }
      ],
      "UpstreamPathTemplate": "/customers/{id}/products",
      "UpstreamHttpMethod": [ "Get", "Put" ]
    }

  ],

  "GlobalConfiguration": {
    "BaseUrl": "http://localhost:80"
  }

}

Answer 1

只是在评论中根据OP自己的解决方案添加一个答案。

这不起作用的原因是评估顺序。 Ocelot 将按照指定的顺序评估路径，除非在路由上指定了 priority 属性（参见文档 https://ocelot.readthedocs.io/en/latest/features/routing.html#priority）

因此在以下路由配置中：

{
   "ReRoutes":[
      {
         "UpstreamPathTemplate":"/customers/{id}", // <-- will be evaluated first
         ...
      },
      {
         "UpstreamPathTemplate":"/customers/{id}/products",
         ...
      },
      ...
   ],
   ...
}

将评估第一条路径，即使上游调用指定了 /products 子路径，Ocelot 也会匹配该路径。

要解决此问题，要么更改顺序，以便首先评估更具体的路径：

{
   "ReRoutes":[
      {
         "UpstreamPathTemplate":"/customers/{id}/products", // <-- will be evaluated first
         ...
      },
      {
         "UpstreamPathTemplate":"/customers/{id}",
         ...
      },
      ...
   ],
   ...
}

或使用优先级属性，优先级用于指示所需的评估顺序：

{
   "ReRoutes":[
      {
         "UpstreamPathTemplate":"/customers/{id}",
         "Priority": 0, 
         ...
      },
      {
         "UpstreamPathTemplate":"/customers/{id}/products", // <-- will be evaluated first
         "Priority": 1, 
         ...
      },
      ...
   ],
   ...
}