feat: support node 18 (#8447)

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       matrix:
         # Include all major maintenance + active LTS + current Node.js versions.
         # https://github.com/nodejs/Release#release-schedule
-        node: [14, 16]
+        node: [14, 16, 18]
     steps:
       - name: Checkout
         uses: actions/checkout@v3

src/node/NodeWebSocketTransport.ts

@@ -16,9 +16,21 @@
 import NodeWebSocket from 'ws';
 import { ConnectionTransport } from '../common/ConnectionTransport.js';
 import { packageVersion } from '../generated/version.js';
+import { promises as dns } from 'dns';
 
 export class NodeWebSocketTransport implements ConnectionTransport {
-  static create(url: string): Promise<NodeWebSocketTransport> {
+  static async create(urlString: string): Promise<NodeWebSocketTransport> {
+    // TODO(jrandolf): Starting in Node 17, IPv6 is favoured over IPv4 due to a change
+    // in a default option:
+    // - https://github.com/nodejs/node/issues/40537,
+    // Due to this, we parse and resolve the hostname manually with the previous
+    // behavior according to:
+    // - https://nodejs.org/api/dns.html#dnslookuphostname-options-callback
+    // because of https://bugzilla.mozilla.org/show_bug.cgi?id=1769994.
+    const url = new URL(urlString);
+    const { address } = await dns.lookup(url.hostname, { verbatim: false });
+    url.hostname = address;
+
     return new Promise((resolve, reject) => {
       const ws = new NodeWebSocket(url, [], {
         followRedirects: true,