Microsoft.OpenApi.Models.OpenApiDocument.SerializeAsV2 无效 URI：无法确定 URI 的格式

Question

我正在将我的 API 从 .netcore 2.1 升级到 3.1

API 使用SwagerUI 和Autorest 生成客户端。

从this question about Autorest发现需要用到：

app.UseSwagger(c =>
{
    c.SerializeAsV2 = true;
});

但是，用户界面给出：

Fetch error
Internal Server Error v1/swagger.json

JSON 是：

{
  "StatusCode": 500,
  "ErrorMessage": "Internal server error: Invalid URI: The format of the URI could not be determined. nStack:
    at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
    at Microsoft.OpenApi.Models.OpenApiDocument.WriteHostInfoV2(IOpenApiWriter writer, IList`1 servers)
    at Microsoft.OpenApi.Models.OpenApiDocument.SerializeAsV2(IOpenApiWriter writer)
    at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.RespondWithSwaggerJson(HttpResponse response, OpenApiDocument swagger)
    at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
    at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)",
  "SystemMessage": "Invalid URI: The format of the URI could not be determined."
}

[更新]

我发现提到它here：

c.PreSerializeFilters.Add((swaggerDoc, httpReq) =>
{
    swaggerDoc.Servers = new List<OpenApiServer> { new OpenApiServer { Url = $"{httpReq.Scheme}://{httpReq.Host.Value}{pathPrefix}" } };
});

现在 JSON 显示：

{
  "StatusCode": 500,
  "ErrorMessage": "Internal server error: Invalid URI: Invalid port specified. Stack:
    at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
    at Microsoft.OpenApi.Models.OpenApiDocument.WriteHostInfoV2(IOpenApiWriter writer, IList`1 servers)
    at Microsoft.OpenApi.Models.OpenApiDocument.SerializeAsV2(IOpenApiWriter writer)
    at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.RespondWithSwaggerJson(HttpResponse response, OpenApiDocument swagger)
    at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
    at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)",
  "SystemMessage": "Invalid URI: Invalid port specified."
}

Answer 1

以下工作

        var basePath = "/v1";
        app.UseSwagger(c =>
        {
            c.RouteTemplate = "swagger/{documentName}/swagger.json";
            c.SerializeAsV2 = true;
            c.PreSerializeFilters.Add((swaggerDoc, httpReq) =>
            {
                swaggerDoc.Servers = new List<OpenApiServer> { new OpenApiServer { Url = $"{httpReq.Scheme}://{httpReq.Host.Value}{basePath}" } };
            });

        });