Swagger UI is sending request as `http` instead of `https` after upgrading `Swashbuckle.AspNetCore` nuget package to 5.6.0

Hi,

I’m experiencing this issue after I upgraded the Swashbuckle.AspNetCore nuget package to 5.6.0 from 5.5.0. Swagger UI seems to be sending the request over http protocol instead of https, although the swagger page itself is hosted on https.

It throws TypeError: Failed to fetch.

The difference that I noticed on swagger page before and after upgrading the package is as below:

Before:

After:

Before upgrading the package, it didn’t have the servers array in the response which, I believe, might be related to the change that was released in 5.6.0:

Better support for reverse proxy environments, incl. assigning servers metadata based on the presence of common reverse proxy headers

Also, notice that the server url has the http scheme instead of https. Please let me know if there is any other information needed.

[alexrosenfeld10]

I just added a

                options.PreSerializeFilters.Add((document, request) =>
                {
                    var scheme = request.Host.Host.StartsWith("localhost", StringComparison.OrdinalIgnoreCase)
                        ? "http"
                        : "https";
                    document.Servers = new[]
                    {
                        new OpenApiServer
                        {
                            Url = $"{scheme}://{request.Host}"
                        }
                    };
                });

to get around the issue

[cookiem3r]

Encountered the same issue on v6.2.1