Improve Listener resource log formatting

Author: murgatroid99

packages/grpc-js-xds/src/xds-client.ts

@@ -250,7 +250,7 @@ class AdsResponseParser {
     if (!decodeResult.value) {
       return;
     }
-    this.adsCallState.client.trace('Parsed resource of type ' + this.result.type.getTypeUrl() + ': ' + JSON.stringify(decodeResult.value, undefined, 2));
+    this.adsCallState.client.trace('Parsed resource of type ' + this.result.type.getTypeUrl() + ': ' + JSON.stringify(decodeResult.value, (key, value) => (value && value.type === 'Buffer' && Array.isArray(value.data)) ? (value.data as Number[]).map(n => n.toString(16)).join('') : value, 2));
     this.result.haveValidResources = true;
     if (this.result.type.resourcesEqual(resourceState.cachedResource, decodeResult.value)) {
       return;

packages/grpc-js-xds/src/xds-resource-type/listener-resource-type.ts

@@ -106,7 +106,7 @@ export class ListenerResourceType extends XdsResourceType {
       );
     }
     const message = decodeSingleResource(LDS_TYPE_URL, resource.value);
-    trace('Decoded raw resource of type ' + LDS_TYPE_URL + ': ' + JSON.stringify(message, undefined, 2));
+    trace('Decoded raw resource of type ' + LDS_TYPE_URL + ': ' + JSON.stringify(message, (key, value) => (value && value.type === 'Buffer' && Array.isArray(value.data)) ? (value.data as Number[]).map(n => n.toString(16)).join('') : value, 2));
     const validatedMessage = this.validateResource(message);
     if (validatedMessage) {
       return {