ms/sdclistener/application/src/main/java/org/onap/ccsdk/cds/sdclistener/client/SdcListenerAuthClientInterceptor.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 package org.onap.ccsdk.cds.sdclistener.client;
  17
  18 import io.grpc.CallOptions;
  19 import io.grpc.Channel;
  20 import io.grpc.ClientCall;
  21 import io.grpc.ClientInterceptor;
  22 import io.grpc.ForwardingClientCall;
  23 import io.grpc.Metadata;
  24 import io.grpc.Metadata.Key;
  25 import io.grpc.MethodDescriptor;
  26 import org.springframework.beans.factory.annotation.Value;
  27 import org.springframework.boot.context.properties.ConfigurationProperties;
  28 import org.springframework.stereotype.Component;
  29
  30 /**
  31  * To provide authentication with GRPC server.
  32  */
  33 @ConfigurationProperties("listenerservice")
  34 @Component
  35 public class SdcListenerAuthClientInterceptor implements ClientInterceptor {
  36
  37     @Value("${listenerservice.config.authHeader}")
  38     private String basicAuth;
  39
  40     @Override
  41     public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(MethodDescriptor<ReqT, RespT> methodDescriptor,
  42                                                                CallOptions callOptions, Channel channel) {
  43         Key<String> authHeader = Key.of("Authorization", Metadata.ASCII_STRING_MARSHALLER);
  44         return new ForwardingClientCall.SimpleForwardingClientCall<ReqT, RespT>(
  45             channel.newCall(methodDescriptor, callOptions)) {
  46             @Override
  47             public void start(Listener<RespT> responseListener, Metadata headers) {
  48                 headers.put(authHeader, basicAuth);
  49                 super.start(responseListener, headers);
  50             }
  51         };
  52     }
  53 }