Basic Auth credentials are not encoded

[lafrech]

Hi.

We discovered this today. The "try it" feature is broken for credentials using non-ASCII characters.

Server-side, we expect utf-8 credentials. To be fair, there doesn't seem to be a consensus about which encoding to use:

• https://stackoverflow.com/questions/7242316/what-encoding-should-i-use-for-http-basic-authentication
• [Python 3] Basic auth relying on utf-8 encoding by default psf/requests#4564
• user/pwd encoding is assumed (hardcoded) to be utf-8 miguelgrinberg/Flask-HTTPAuth#151

Anyway, here's a link to the very same issue on Swagger-UI that explains things better than I would: swagger-api/swagger-ui#2456. Spoiler: they internalized btoa and used utf-8.

Thanks again for RapiDoc. Our OpenAPI UI of choice. Have a nice day.