Feature support oauth2 for node client (#190)

* The cpp client already supports oauth2 authentication, and some users want to support this feature in the node js client as well, so enable it in the node js client

index.d.ts

@@ -20,7 +20,7 @@
 
 export interface ClientConfig {
   serviceUrl: string;
-  authentication?: AuthenticationTls | AuthenticationAthenz | AuthenticationToken;
+  authentication?: AuthenticationTls | AuthenticationAthenz | AuthenticationToken | AuthenticationOauth2;
   operationTimeoutSeconds?: number;
   ioThreads?: number;
   messageListenerThreads?: number;
@@ -175,6 +175,18 @@ export class AuthenticationToken {
   constructor(params: { token: string });
 }
 
+export class AuthenticationOauth2 {
+  constructor(params: {
+    type: string;
+    issuer_url: string;
+    client_id?: string;
+    client_secret?: string;
+    private_key?: string;
+    audience?: string;
+    scope?: string;
+  });
+}
+
 export enum LogLevel {
   DEBUG = 0,
   INFO = 1,

index.js

@@ -21,6 +21,7 @@ const PulsarBinding = require('bindings')('Pulsar');
 const AuthenticationTls = require('./src/AuthenticationTls.js');
 const AuthenticationAthenz = require('./src/AuthenticationAthenz.js');
 const AuthenticationToken = require('./src/AuthenticationToken.js');
+const AuthenticationOauth2 = require('./src/AuthenticationOauth2.js');
 
 const LogLevel = {
   DEBUG: 0,
@@ -36,6 +37,7 @@ const Pulsar = {
   AuthenticationTls,
   AuthenticationAthenz,
   AuthenticationToken,
+  AuthenticationOauth2,
   LogLevel,
 };
 

src/Authentication.cc

@@ -80,6 +80,13 @@ Authentication::Authentication(const Napi::CallbackInfo &info)
       return;
     }
     this->cAuthentication = pulsar_authentication_athenz_create(info[1].ToString().Utf8Value().c_str());
+  } else if (authMethod == "oauth2") {
+    if (info.Length() < 2 || !info[1].IsString()) {
+      Napi::Error::New(env, "Authentication parameter must be a JSON string for oauth2")
+          .ThrowAsJavaScriptException();
+      return;
+    }
+    this->cAuthentication = pulsar_authentication_oauth2_create(info[1].ToString().Utf8Value().c_str());
   } else {
     Napi::Error::New(env, "Unsupported authentication method").ThrowAsJavaScriptException();
     return;

src/AuthenticationOauth2.js

@@ -0,0 +1,28 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+const PulsarBinding = require('bindings')('Pulsar');
+
+class AuthenticationOauth2 {
+  constructor(params) {
+    const paramsStr = (typeof params === 'object') ? JSON.stringify(params) : params;
+    this.binding = new PulsarBinding.Authentication('oauth2', paramsStr);
+  }
+}
+
+module.exports = AuthenticationOauth2;

tstest.ts

@@ -39,6 +39,23 @@ import Pulsar = require('./index');
     tokenExpirationTime: '3600',
   });
 
+  const authOauth2PrivateKey: Pulsar.AuthenticationOauth2 = new Pulsar.AuthenticationOauth2({
+    type: "client_credentials",
+    issuer_url: "issuer-url",
+    private_key: "credentials-file-path",
+    audience: "audience",
+    scope: "your-scope",
+  });
+
+  const authOauth2ClientId: Pulsar.AuthenticationOauth2 = new Pulsar.AuthenticationOauth2({
+    type: "client_credentials",
+    issuer_url: "issuer-url",
+    client_id: "client-id",
+    client_secret: "client-secret",
+    audience: "audience",
+    scope: "scope"
+  });
+
   const authToken: Pulsar.AuthenticationToken = new Pulsar.AuthenticationToken({
     token: 'foobar',
   });