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/*
* ============LICENSE_START======================================================================
* Copyright (C) 2018 NOKIA Intellectual Property, 2018-2019 Nordix Foundation. All rights reserved.
* ===============================================================================================
* 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.
* ============LICENSE_END========================================================================
*/
package org.onap.dcaegen2.collectors.datafile.service.producer;
import static org.onap.dcaegen2.collectors.datafile.model.logging.MdcVariables.REQUEST_ID;
import static org.onap.dcaegen2.collectors.datafile.model.logging.MdcVariables.X_INVOCATION_ID;
import static org.onap.dcaegen2.collectors.datafile.model.logging.MdcVariables.X_ONAP_REQUEST_ID;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.Future;
import javax.net.ssl.SSLContext;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.IOUtils;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
import org.apache.http.impl.nio.client.HttpAsyncClients;
import org.apache.http.ssl.SSLContextBuilder;
import org.onap.dcaegen2.collectors.datafile.io.FileSystemResourceWrapper;
import org.onap.dcaegen2.collectors.datafile.io.IFileSystemResource;
import org.onap.dcaegen2.collectors.datafile.model.CommonFunctions;
import org.onap.dcaegen2.collectors.datafile.model.ConsumerDmaapModel;
import org.onap.dcaegen2.collectors.datafile.model.logging.MdcVariables;
import org.onap.dcaegen2.collectors.datafile.web.PublishRedirectStrategy;
import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.config.DmaapPublisherConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import org.slf4j.Marker;
import org.slf4j.MarkerFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.web.util.DefaultUriBuilderFactory;
import reactor.core.publisher.Mono;
/**
* @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 7/4/18
* @author <a href="mailto:henrik.b.andersson@est.tech">Henrik Andersson</a>
*/
public class DmaapProducerReactiveHttpClient {
private static final String X_DMAAP_DR_META = "X-DMAAP-DR-META";
private static final String NAME_JSON_TAG = "name";
private static final String INTERNAL_LOCATION_JSON_TAG = "internalLocation";
private static final String URI_SEPARATOR = "/";
private static final String DEFAULT_FEED_ID = "1";
private static final Marker INVOKE = MarkerFactory.getMarker("INVOKE");
private static final Marker INVOKE_RETURN = MarkerFactory.getMarker("INVOKE_RETURN");
private final Logger logger = LoggerFactory.getLogger(this.getClass());
private final String dmaapHostName;
private final Integer dmaapPortNumber;
private final String dmaapTopicName;
private final String dmaapProtocol;
private final String dmaapContentType;
private final String user;
private final String pwd;
private IFileSystemResource fileResource = new FileSystemResourceWrapper();
/**
* Constructor DmaapProducerReactiveHttpClient.
*
* @param dmaapPublisherConfiguration - DMaaP producer configuration object
*/
public DmaapProducerReactiveHttpClient(DmaapPublisherConfiguration dmaapPublisherConfiguration) {
this.dmaapHostName = dmaapPublisherConfiguration.dmaapHostName();
this.dmaapPortNumber = dmaapPublisherConfiguration.dmaapPortNumber();
this.dmaapTopicName = dmaapPublisherConfiguration.dmaapTopicName();
this.dmaapProtocol = dmaapPublisherConfiguration.dmaapProtocol();
this.dmaapContentType = dmaapPublisherConfiguration.dmaapContentType();
this.user = dmaapPublisherConfiguration.dmaapUserName();
this.pwd = dmaapPublisherConfiguration.dmaapUserPassword();
}
/**
* Function for calling DMaaP HTTP producer - post request to DMaaP DataRouter.
*
* @param consumerDmaapModel - object which will be sent to DMaaP DataRouter
* @return status code of operation
*/
public Mono<HttpStatus> getDmaapProducerResponse(ConsumerDmaapModel consumerDmaapModel,
Map<String, String> contextMap) {
MdcVariables.setMdcContextMap(contextMap);
try (CloseableHttpAsyncClient webClient = createWebClient()) {
HttpPut put = new HttpPut();
prepareHead(consumerDmaapModel, put);
prepareBody(consumerDmaapModel, put);
addUserCredentialsToHead(put);
logger.trace(INVOKE, "Starting to publish to DR {}", consumerDmaapModel.getInternalLocation());
Future<HttpResponse> future = webClient.execute(put, null);
HttpResponse response = future.get();
logger.trace(INVOKE_RETURN, "Response from DR {}", response);
return Mono.just(HttpStatus.valueOf(response.getStatusLine().getStatusCode()));
} catch (Exception e) {
logger.error("Unable to send file to DataRouter. Data: {}", consumerDmaapModel.getInternalLocation(), e);
return Mono.error(e);
}
}
private void addUserCredentialsToHead(HttpPut put) {
String plainCreds = user + ":" + pwd;
byte[] plainCredsBytes = plainCreds.getBytes(StandardCharsets.ISO_8859_1);
byte[] base64CredsBytes = Base64.encodeBase64(plainCredsBytes);
String base64Creds = new String(base64CredsBytes);
logger.trace("base64Creds...: {}", base64Creds);
put.addHeader("Authorization", "Basic " + base64Creds);
}
private void prepareHead(ConsumerDmaapModel model, HttpPut put) {
put.addHeader(HttpHeaders.CONTENT_TYPE, dmaapContentType);
JsonElement metaData = new JsonParser().parse(CommonFunctions.createJsonBody(model));
String name = metaData.getAsJsonObject().remove(NAME_JSON_TAG).getAsString();
metaData.getAsJsonObject().remove(INTERNAL_LOCATION_JSON_TAG);
put.addHeader(X_DMAAP_DR_META, metaData.toString());
put.setURI(getUri(name));
String requestID = MDC.get(REQUEST_ID);
put.addHeader(X_ONAP_REQUEST_ID, requestID);
String invocationID = UUID.randomUUID().toString();
put.addHeader(X_INVOCATION_ID, invocationID);
}
private void prepareBody(ConsumerDmaapModel model, HttpPut put) throws IOException {
Path fileLocation = Paths.get(model.getInternalLocation());
this.fileResource.setPath(fileLocation);
InputStream fileInputStream = fileResource.getInputStream();
put.setEntity(new ByteArrayEntity(IOUtils.toByteArray(fileInputStream)));
}
private URI getUri(String fileName) {
String path = dmaapTopicName + URI_SEPARATOR + DEFAULT_FEED_ID + URI_SEPARATOR + fileName;
return new DefaultUriBuilderFactory().builder().scheme(dmaapProtocol).host(dmaapHostName).port(dmaapPortNumber)
.path(path).build();
}
void setFileSystemResource(IFileSystemResource fileSystemResource) {
fileResource = fileSystemResource;
}
protected CloseableHttpAsyncClient createWebClient()
throws KeyManagementException, NoSuchAlgorithmException, KeyStoreException {
SSLContext sslContext = new SSLContextBuilder() //
.loadTrustMaterial(null, (certificate, authType) -> true) //
.build();
CloseableHttpAsyncClient webClient = HttpAsyncClients.custom() //
.setSSLContext(sslContext) //
.setSSLHostnameVerifier(new NoopHostnameVerifier()) //
.setRedirectStrategy(PublishRedirectStrategy.INSTANCE) //
.build();
webClient.start();
return webClient;
}
}
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