如何在 CreatedAtRoute 位置标头上添加网关基本路径 - URL 重写答案

【问题标题】：How add Gateway base path on CreatedAtRoute Location Header - URL Rewrite如何在 CreatedAtRoute 位置标头上添加网关基本路径 - URL 重写
【发布时间】：2020-01-31 20:29:03
【问题描述】：

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" ]
    }
}

我有以下控制器

[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 标头为 {domain}/serviceName/api/v1/Name/{id}，但它返回的是 {domain}/api/v1/Name/{id}。

请问有人知道如何使用 CreatedAtRoute 重写 URL 吗？

【问题讨论】：

标签： c# .net-core url-rewriting url-routing ocelot

【解决方案1】：

我通过阅读 Ocelot 文档here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"
  } 
}

更多关于不同环境设置BaseUrl的信息，请查看here。

【讨论】：