accept allowHTTP1 for https server option?

[suiboli314]

When trying to run Vite in dev mode with bun runtime + https, I ran into the following error:

Missing ALPN Protocol, expected `h2` to be available.
If this is a HTTP request: The server was not configured with the `allowHTTP1` option or a listener for the `unknownProtocol` event.

As pointed out here: oven-sh/bun#14825 (comment), it looks like Vite currently doesn’t support passing SecureServerOptions from node:http2 as https option

vite/packages/vite/src/node/http.ts

Lines 39 to 43 in 8099582

	/**
	* Enable TLS + HTTP/2.
	* Note: this downgrades to TLS only when the proxy option is also used.
	*/
	https?: HttpsServerOptions

I may be misunderstanding, but it seems this prevent adding allowHTTP1
Is there any known workaround for this at the moment? or is it more a matter of waiting until Bun ships http2 support?

[sapphi-red]

Vite does support passing https options. Vite sets allowHTTP1: true by default.
Setting server.proxy: {} would force Vite to use HTTPS with HTTP1.1. But that's an implementation detail, so it may change in the future.