如何在 CreatedAtRoute 位置添加网关基本路径 Header - URL 重写

Question

我有一个 Ocelot 网关配置如下：

{
  "ReRoutes": [
    {
      "DownstreamPathTemplate": "/api/{version}/{everything}",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 3010
        }
      ],
      "UpstreamPathTemplate": "/serviceName/api/{version}/{everything}",
      "UpstreamHttpMethod": [ "POST", "PATCH", "PUT", "GET", "DELETE" ]
    }
}

我有以下 controller

[Produces("application/json")]
[Route("api/v1/[controller]")]
[ApiController]
public class NameController : ControllerBase
{
    [HttpPost()]
    public async Task<IActionResult> Create([FromForm]Request request, CancellationToken cancellationToken)
    {
        // create something..

        return CreatedAtRoute("Get", new { id }, string.Empty);
    }

    [HttpGet("{id}", Name = "Get")]
    public async Task<IActionResult> Get([FromRoute] string id, CancellationToken cancellationToken)
    {
        // return something
    }
}

我希望我的 Location header 是{domain}/serviceName/api/v1/Name/{id} ，但是它返回{domain}/api/v1/Name/{id} 。

任何人都知道如何使用 CreatedAtRoute 进行 URL 重写，好吗？

Answer 1

我通过阅读此处的 Ocelot 文档找到了解决方案。

基本上你需要添加 Header 转换：

{
  "ReRoutes": [
    {
      "DownstreamHeaderTransform": {
      "Location": "{DownstreamBaseUrl}, {BaseUrl}/serviceName"
      },
      "HttpHandlerOptions": {
        "AllowAutoRedirect": false
      },
      "DownstreamPathTemplate": "/api/{version}/{everything}",
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "localhost",
          "Port": 3010
        }
      ],
      "UpstreamPathTemplate": "/serviceName/api/{version}/{everything}",
      "UpstreamHttpMethod": [ "POST", "PATCH", "PUT", "GET", "DELETE" ]
    }
  ],
  "GlobalConfiguration": {
    "BaseUrl": "https://api.mybusiness.com"
  } 
}

有关为不同环境设置 BaseUrl 的更多信息，请参见此处。