Using nginx https may cause some ExternalAuthentication issues, as if the middleware order is incorrect， V4.8

[ahjszll]

I am using nginx's HTTPS proxy 127.0.0.1:5000，HostingDonfig.UseProxy is configured correctly，I used ExternalAuth Facebook，
But

When the login box on Facebook returns, it prompts Can't load URL: The domain of this URL isn't included in the app's domains. To be able to load this URL, add all domains and subdomains of your app to the App Domains field in your app settings。

I tracked the source code of Facebook Handler，
https://github.com/dotnet/aspnetcore/blob/main/src/Security/Authentication/Facebook/src/FacebookHandler.cs

`
protected override async Task ExchangeCodeAsync(OAuthCodeExchangeContext context)
{
var logger = EngineContext.Current.Resolve<Nop.Services.Logging.ILogger>();
logger.Warning("ExchangeCodeAsync");
var tokenRequestParameters = new Dictionary<string, string>()
{
{ "client_id", Options.ClientId },
{ "redirect_uri", context.RedirectUri },
{ "client_secret", Options.ClientSecret },
{ "code", context.Code }
};
//tokenRequestParameters["redirect_uri"] = tokenRequestParameters["redirect_uri"].Replace("http", "https");
logger.Warning("tokenRequestParameters:" + tokenRequestParameters["redirect_uri"]);

}
`
Among them, tokenRequestParameters ["relocat_uri"] is http:///signin-Facebook, which should actually be https:///// signin-facebook，
So I temporarily modified the source code and added a method of replacing HTTP with HTTPS

Continuing to track this issue, I found that the authentication middleware occurred earlier than UseForwardedHeaders

So I tried using "UseAuthorization" after "UseForwardedHeaders" and found that it could also solve the above problem

I haven't found any more clues and I'm not sure when 'UseAuthorization' was called“

[exileDev]

Hi! I just tested the Facebook authentication plugin in Nginx, and it works fine.

[ahjszll]

Hi! I just tested the Facebook authentication plugin in Nginx, and it works fine.

thanks ,There seems to be an issue with my code, I will continue to investigate further