[FEAT] implemented noResolve connect option

README.md

@@ -758,7 +758,7 @@ more performant or appropriate.
 The following is the list of connection options and default values.
 
 | Option                  | Default            | Description                                                                                                                                                                                                                                                                                                                                                                              |
-| ----------------------- | ------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+|-------------------------|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | `authenticator`         | none               | Specifies the authenticator function that sets the client credentials.                                                                                                                                                                                                                                                                                                                   |
 | `debug`                 | `false`            | If `true`, the client prints protocol interactions to the console. Useful for debugging.                                                                                                                                                                                                                                                                                                 |
 | `ignoreClusterUpdates`  | `false`            | If `true` the client will ignore any cluster updates provided by the server.                                                                                                                                                                                                                                                                                                             |
@@ -770,6 +770,7 @@ The following is the list of connection options and default values.
 | `noAsyncTraces`         | `false`            | When `true` the client will not add additional context to errors associated with request operations. Setting this option to `true` will greatly improve performance of request/reply and JetStream publishers.                                                                                                                                                                           |
 | `noEcho`                | `false`            | Subscriptions receive messages published by the client. Requires server support (1.2.0). If set to true, and the server does not support the feature, an error with code `NO_ECHO_NOT_SUPPORTED` is emitted, and the connection is aborted. Note that it is possible for this error to be emitted on reconnect when the server reconnects to a server that does not support the feature. |
 | `noRandomize`           | `false`            | If set, the order of user-specified servers is randomized.                                                                                                                                                                                                                                                                                                                               |
+| `noResolve`             |                    | If set to true, will not resolve host names.                                                                                                                                                                                                                                                                                                                                             |
 | `pass`                  |                    | Sets the password for a connection.                                                                                                                                                                                                                                                                                                                                                      |
 | `pedantic`              | `false`            | Turns on strict subject format checks.                                                                                                                                                                                                                                                                                                                                                   |
 | `pingInterval`          | `120000`           | Number of milliseconds between client-sent pings.                                                                                                                                                                                                                                                                                                                                        |

package.json

@@ -42,7 +42,7 @@
     "cjs-jetstream": "deno run --allow-all ./bin/cjs-fix-imports.ts -o jetstream/ ./.deps/nats.deno/jetstream/",
     "cjs": "npm run cjs-nbc && npm run cjs-jetstream",
     "clean": "shx rm -Rf ./lib/* ./nats-base-client ./.deps",
-    "clone-nbc": "shx mkdir -p ./.deps && cd ./.deps && git clone --branch v1.26.0 https://github.com/nats-io/nats.deno.git",
+    "clone-nbc": "shx mkdir -p ./.deps && cd ./.deps && git clone --branch main https://github.com/nats-io/nats.deno.git",
     "fmt": "deno fmt ./src/ ./examples/ ./test/",
     "prepack": "npm run clone-nbc && npm run cjs && npm run check-package && npm run build",
     "ava": "nyc ava --verbose -T 60000",

src/connect.ts

@@ -27,7 +27,7 @@ export function connect(opts: ConnectionOptions = {}): Promise<NatsConnection> {
     factory: (): Transport => {
       return new NodeTransport();
     },
-    dnsResolveFn: nodeResolveHost,
+    dnsResolveFn: opts.noResolve === true ? undefined : nodeResolveHost,
   } as TransportFactory);
   return NatsConnectionImpl.connect(opts);
 }

test/basics.js

@@ -32,6 +32,7 @@ const { deferred, delay, nuid } = require(
 const { Lock } = require("./helpers/lock");
 const { NatsServer } = require("./helpers/launcher");
 const { jetstreamServerConf } = require("./helpers/jsutil.js");
+const {getResolveFn} = require("../nats-base-client/transport");
 
 const u = "demo.nats.io:4222";
 
@@ -796,3 +797,12 @@ test("basics - js fetch on stopped server doesn't close", async (t) => {
   await nc.close();
   await ns.stop();
 });
+
+test("basics - noResolve", async (t) => {
+  const ns = await NatsServer.start();
+  const nc = await connect({port: ns.port, noResolve: true});
+  t.plan(1);
+  t.is(getResolveFn(), undefined);
+  await nc.close();
+  await ns.stop();
+})