http2: support ALPNCallback option

PR-URL: #56187Fixes: #55994 Refs: #45190 Reviewed-By: Tim Perry <[email protected]> Reviewed-By: Juan José Arboleda <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>

Author: ZYSzys

lib/internal/http2/core.js

@@ -3136,9 +3136,13 @@ function initializeOptions(options){
 
 functioninitializeTLSOptions(options,servername){
 options=initializeOptions(options);
-options.ALPNProtocols=['h2'];
-if(options.allowHTTP1===true)
-options.ALPNProtocols.push('http/1.1');
+
+if(!options.ALPNCallback){
+options.ALPNProtocols=['h2'];
+if(options.allowHTTP1===true)
+options.ALPNProtocols.push('http/1.1');
+}
+
 if(servername!==undefined&&!options.servername)
 options.servername=servername;
 returnoptions;

test/parallel/test-http2-alpn.js

@@ -0,0 +1,47 @@
+'use strict';
+constcommon=require('../common');
+constfixtures=require('../common/fixtures');
+
+// This test verifies that http2 server support ALPNCallback option.
+
+if(!common.hasCrypto)common.skip('missing crypto');
+
+constassert=require('assert');
+consth2=require('http2');
+consttls=require('tls');
+
+{
+// Server sets two incompatible ALPN options:
+assert.throws(()=>h2.createSecureServer({
+ALPNCallback: ()=>'a',
+ALPNProtocols: ['b','c']
+}),(error)=>error.code==='ERR_TLS_ALPN_CALLBACK_WITH_PROTOCOLS');
+}
+
+{
+constserver=h2.createSecureServer({
+key: fixtures.readKey('rsa_private.pem'),
+cert: fixtures.readKey('rsa_cert.crt'),
+ALPNCallback: ()=>'a',
+});
+
+server.on(
+'secureConnection',
+common.mustCall((socket)=>{
+assert.strictEqual(socket.alpnProtocol,'a');
+socket.end();
+server.close();
+})
+);
+
+server.listen(0,function(){
+constclient=tls.connect({
+port: server.address().port,
+rejectUnauthorized: false,
+ALPNProtocols: ['a'],
+},common.mustCall(()=>{
+assert.strictEqual(client.alpnProtocol,'a');
+client.end();
+}));
+});
+}