src/agent/core/remote/AuthenticationDecorator.ts

/*!
 *
 * 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.
 *
 */

import * as grpc from '@grpc/grpc-js';
import config from '../../../config/AgentConfig';
import ChannelDecorator from './ChannelDecorator';

/** Active authentication header by SW_AGENT_AUTHENTICATION (Java AuthenticationDecorator). */
export default class AuthenticationDecorator implements ChannelDecorator {
  build(): grpc.Interceptor {
    return (options, nextCall) => {
      return new grpc.InterceptingCall(nextCall(options), {
        start: (metadata, listener, next) => {
          if (config.authorization) {
            metadata.set('Authentication', config.authorization);
          }
          next(metadata, listener);
        },
      });
    };
  }
}