http2.createSecureServer - No warnings if no cert/key provided in options

[ghost]

• Version: v9.0.0-pre
• Platform: Linux linuxbox 4.10.0-30-generic fix LICENSE #34~16.04.1-Ubuntu SMP Wed Aug 2 02:13:56 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
• **Subsystem: http2

// Server
const http2 = require('http2');
const hostname = '127.0.0.1';
const port = 3000;

// Create a plain-text HTTP/2 server
const server = http2.createSecureServer();

server.on('stream', (stream, headers) => {
    // stream is a Duplex
    stream.respond({
        'content-type': 'text/html',
        ':status': 200
    });
    stream.end('<h1>Hello World</h1>');
});

server.listen(port, hostname, () => {
    console.log(`Server running at https://${hostname}:${port}/`);
});

./node --expose-http2 http2server.js (node:21866) ExperimentalWarning: The http2 module is an experimental API. Server running at https://127.0.0.1:3000/

https://127.0.0.1:3000/ is unreachable and no warnings in terminal

Note: this behavior is the same with https module

[mscdex]

TLS is technically optional for HTTP2, although most browsers for example only implement HTTP2 with TLS.

As far as https not requiring a key and certificate goes, see this issue.

[jasnell]

This issue is not specific to http/2 in any way and there is already an existing issue that deals with this. Going to go ahead and close this one.