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/*
*
* Copyright (c) 2022. Deutsche Telekom AG
*
* 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.
*
* SPDX-License-Identifier: Apache-2.0
*
*
*/
package org.onap.portalng.bff.config;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import java.time.Clock;
import java.util.List;
import lombok.extern.slf4j.Slf4j;
import org.onap.portalng.bff.exceptions.DownstreamApiProblemException;
import org.onap.portalng.bff.utils.Logger;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.http.codec.ClientCodecConfigurer;
import org.springframework.http.codec.json.Jackson2JsonDecoder;
import org.springframework.http.codec.json.Jackson2JsonEncoder;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.security.oauth2.client.ReactiveOAuth2AuthorizedClientManager;
import org.springframework.security.oauth2.client.web.reactive.function.client.ServerOAuth2AuthorizedClientExchangeFilterFunction;
import org.springframework.web.reactive.function.client.ExchangeFilterFunction;
import org.springframework.web.reactive.function.client.ExchangeStrategies;
import org.springframework.web.reactive.function.client.WebClient;
import org.zalando.problem.jackson.ProblemModule;
import reactor.core.publisher.Mono;
@Slf4j
@Configuration
public class BeansConfig {
public static final String OAUTH2_EXCHANGE_FILTER_FUNCTION = "oauth2ExchangeFilterFunction";
private static final String ID_TOKEN_EXCHANGE_FILTER_FUNCTION = "idTokenExchangeFilterFunction";
private static final String ERROR_HANDLING_EXCHANGE_FILTER_FUNCTION =
"errorHandlingExchangeFilterFunction";
private static final String LOG_REQUEST_EXCHANGE_FILTER_FUNCTION =
"logRequestExchangeFilterFunction";
private static final String LOG_RESPONSE_EXCHANGE_FILTER_FUNCTION =
"logResponseExchangeFilterFunction";
private static final String CLIENT_REGISTRATION_ID = "keycloak";
public static final String X_REQUEST_ID = "X-Request-Id";
@Bean(name = OAUTH2_EXCHANGE_FILTER_FUNCTION)
ExchangeFilterFunction oauth2ExchangeFilterFunction(
ReactiveOAuth2AuthorizedClientManager authorizedClientManager) {
final ServerOAuth2AuthorizedClientExchangeFilterFunction oauth2Filter =
new ServerOAuth2AuthorizedClientExchangeFilterFunction(authorizedClientManager);
oauth2Filter.setDefaultClientRegistrationId(CLIENT_REGISTRATION_ID);
return oauth2Filter;
}
@Bean(name = ID_TOKEN_EXCHANGE_FILTER_FUNCTION)
ExchangeFilterFunction idTokenExchangeFilterFunction() {
return new IdTokenExchangeFilterFunction();
}
@Bean(name = ERROR_HANDLING_EXCHANGE_FILTER_FUNCTION)
ExchangeFilterFunction errorHandlingExchangeFilterFunction() {
return ExchangeFilterFunction.ofResponseProcessor(
clientResponse -> {
if (clientResponse.statusCode().isError()) {
return clientResponse
.bodyToMono(String.class)
.doOnNext(s -> log.error("Received error response from downstream: {}", s))
.flatMap(
downstreamExceptionBody -> {
try {
return Mono.error(
new ObjectMapper()
.readValue(
downstreamExceptionBody, DownstreamApiProblemException.class));
} catch (JsonProcessingException e) {
return Mono.error(DownstreamApiProblemException.builder().build());
}
});
}
return Mono.just(clientResponse);
});
}
//
// Don't use this. Log will is written in the LoggerInterceptor
//
@Bean(name = LOG_REQUEST_EXCHANGE_FILTER_FUNCTION)
ExchangeFilterFunction logRequestExchangeFilterFunction() {
return ExchangeFilterFunction.ofRequestProcessor(
clientRequest -> {
List<String> xRequestIdList = clientRequest.headers().get(X_REQUEST_ID);
if (xRequestIdList != null && !xRequestIdList.isEmpty()) {
String xRequestId = xRequestIdList.get(0);
Logger.requestLog(xRequestId, clientRequest.method(), clientRequest.url());
}
return Mono.just(clientRequest);
});
}
@Bean(name = LOG_RESPONSE_EXCHANGE_FILTER_FUNCTION)
ExchangeFilterFunction logResponseExchangeFilterFunction() {
return ExchangeFilterFunction.ofResponseProcessor(
clientResponse -> {
String xRequestId = "not set";
List<String> xRequestIdList = clientResponse.headers().header(X_REQUEST_ID);
if (xRequestIdList != null && !xRequestIdList.isEmpty())
xRequestId = xRequestIdList.get(0);
Logger.responseLog(xRequestId, clientResponse.statusCode());
return Mono.just(clientResponse);
});
}
@Bean
ExchangeStrategies exchangeStrategies(ObjectMapper objectMapper) {
return ExchangeStrategies.builder()
.codecs(
configurer -> {
final ClientCodecConfigurer.ClientDefaultCodecs defaultCodecs =
configurer.defaultCodecs();
defaultCodecs.maxInMemorySize(16 * 1024 * 1024); // 16MB
defaultCodecs.jackson2JsonEncoder(new Jackson2JsonEncoder(objectMapper));
defaultCodecs.jackson2JsonDecoder(new Jackson2JsonDecoder(objectMapper));
})
.build();
}
// we need to use prototype scope to always create new instance of the bean
// because internally WebClient.Builder is mutable
@Bean
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
WebClient.Builder webClientBuilder(
ExchangeStrategies exchangeStrategies,
@Qualifier(ID_TOKEN_EXCHANGE_FILTER_FUNCTION)
ExchangeFilterFunction idTokenExchangeFilterFunction,
@Qualifier(ERROR_HANDLING_EXCHANGE_FILTER_FUNCTION)
ExchangeFilterFunction errorHandlingExchangeFilterFunction,
@Qualifier(LOG_RESPONSE_EXCHANGE_FILTER_FUNCTION)
ExchangeFilterFunction logResponseExchangeFilterFunction) {
return WebClient.builder()
.exchangeStrategies(exchangeStrategies)
.filter(idTokenExchangeFilterFunction)
.filter(errorHandlingExchangeFilterFunction)
.filter(logResponseExchangeFilterFunction);
}
@Bean
Clock clock() {
return Clock.systemUTC();
}
@Bean
public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
return builder
.modules(new ProblemModule(), new JavaTimeModule())
.build()
.setSerializationInclusion(JsonInclude.Include.NON_NULL);
}
@Bean
public XmlMapper xmlMapper() {
return XmlMapper.builder()
.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true)
.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true)
.build();
}
}
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