ms/cds-sdc-listener/application/src/main/java/org/onap/ccsdk/cds/cdssdclistener/client/CdsSdcListenerAuthClientInterceptor.java

   1 /*
   2  * Copyright © 2019 Bell Canada
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.onap.ccsdk.cds.cdssdclistener.client;
  18
  19 import io.grpc.CallOptions;
  20 import io.grpc.Channel;
  21 import io.grpc.ClientCall;
  22 import io.grpc.ClientInterceptor;
  23 import io.grpc.ForwardingClientCall;
  24 import io.grpc.Metadata;
  25 import io.grpc.Metadata.Key;
  26 import io.grpc.MethodDescriptor;
  27 import org.springframework.beans.factory.annotation.Value;
  28 import org.springframework.boot.context.properties.ConfigurationProperties;
  29 import org.springframework.stereotype.Component;
  30
  31 /**
  32  * To provide authentication with GRPC server.
  33  */
  34 @ConfigurationProperties("listenerservice")
  35 @Component
  36 public class CdsSdcListenerAuthClientInterceptor implements ClientInterceptor {
  37
  38     @Value("${listenerservice.config.authHeader}")
  39     private String basicAuth;
  40
  41     @Override
  42     public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(MethodDescriptor<ReqT, RespT> methodDescriptor,
  43                                                                CallOptions callOptions, Channel channel) {
  44         Key<String> authHeader = Key.of("Authorization", Metadata.ASCII_STRING_MARSHALLER);
  45         return new ForwardingClientCall.SimpleForwardingClientCall<ReqT, RespT>(
  46             channel.newCall(methodDescriptor, callOptions)) {
  47             @Override
  48             public void start(Listener<RespT> responseListener, Metadata headers) {
  49                 headers.put(authHeader, basicAuth);
  50                 super.start(responseListener, headers);
  51             }
  52         };
  53     }
  54 }