1  import { access, readFile } from 'node:fs/promises'
 2  import { createSecureServer } from 'node:http2'
 3  
 4  const exists = async (uri: string): boolean => {
 5  	try {
 6  		await access(uri)
 7  		return true
 8  	} catch {
 9  		return false
10  	}
11  }
12  export const dev = async (response: string): Promise<void> => {
13  	const cert = {
14  		cert: await exists('localhost-cert.pem')
15  			? await readFile('localhost-cert.pem')
16  			: throw new Error("missing cert"),
17  		key: await exists('localhost-privkey.pem')
18  			? await readFile('localhost-privkey.pem')
19  			: throw new Error("missing privkey")
20  	}
21  	const server = createSecureServer(cert)
22  
23  	server.on('error', (e) => console.error(e))
24  	server.on('stream', (stream) => {
25  		stream.respond({
26  			':status': 200,
27  			'content-type': 'text/html; charset=utf-8'
28  		})
29  		stream.end(response)
30  	})
31  
32  	server.listen(8443)
33  }