Unable to use set dynamic base-path (i.e. when using a reverse proxy)

[ramondeklein]

The pre-v5.0.0 versions os Swashbuckle.AspNetCore allowed to set the base-path dynamically using a preserialize filter. This allowed to generate the proper paths behind a reverse-proxy, by doing this:

app.UseSwagger(options =>
{
    options.PreSerializeFilters.Add((doc, request) => doc.BasePath = request.Headers["X-Forwarded-Path"]);
});

From v5.0.0 the filter gets an OpenApiDocument instead of a SwaggerDocument and it doesn't have a base-path property. Is there an alternative to enable this functionality?

I have a variable prefix, because my reverse-proxy that allows to access a variety of devices. When accessing the device directly, I can access my API via /api/v1/..., but when using the reverse-proxy I have /device//api/v1/.... I would also like to access the Swagger UI via /device//swagger.

[domaindrivendev]

In Swagger/OpenAPI v3 the structure of the doc has changed a bit. The path has moved into the servers property. Take a look a the following readme section for some inspiration:

https://github.com/domaindrivendev/Swashbuckle.AspNetCore#modify-swagger-with-request-context

[ramondeklein]

That was exactly what I was looking for. Thanks for your support!