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/*
* Copyright © 2019 Bell Canada
*
* Licensed 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.
*/
package org.onap.ccsdk.cds.sdclistener.client;
import io.grpc.CallOptions;
import io.grpc.Channel;
import io.grpc.ClientCall;
import io.grpc.ClientInterceptor;
import io.grpc.ForwardingClientCall;
import io.grpc.Metadata;
import io.grpc.Metadata.Key;
import io.grpc.MethodDescriptor;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
/**
* To provide authentication with GRPC server.
*/
@ConfigurationProperties("listenerservice")
@Component
public class SdcListenerAuthClientInterceptor implements ClientInterceptor {
@Value("${listenerservice.config.authHeader}")
private String basicAuth;
@Override
public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(MethodDescriptor<ReqT, RespT> methodDescriptor,
CallOptions callOptions, Channel channel) {
Key<String> authHeader = Key.of("Authorization", Metadata.ASCII_STRING_MARSHALLER);
return new ForwardingClientCall.SimpleForwardingClientCall<ReqT, RespT>(
channel.newCall(methodDescriptor, callOptions)) {
@Override
public void start(Listener<RespT> responseListener, Metadata headers) {
headers.put(authHeader, basicAuth);
super.start(responseListener, headers);
}
};
}
}
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