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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation.
* ================================================================================
* 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
* ============LICENSE_END=========================================================
*/
package org.onap.policy.clamp.controlloop.participant.dcae.httpclient;
import java.io.Closeable;
import java.io.IOException;
import javax.ws.rs.core.Response.Status;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.ParseException;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.AuthCache;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException;
import org.onap.policy.clamp.controlloop.participant.dcae.model.Loop;
import org.onap.policy.common.endpoints.parameters.RestServerParameters;
import org.onap.policy.common.utils.coder.Coder;
import org.onap.policy.common.utils.coder.CoderException;
import org.onap.policy.common.utils.coder.StandardCoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class AbstractHttpClient implements Closeable {
private static final Logger LOGGER = LoggerFactory.getLogger(AbstractHttpClient.class);
private final HttpClientContext localContext;
private final CloseableHttpClient httpclient;
private final HttpHost target;
public static final Coder CODER = new StandardCoder();
/**
* Constructor.
*/
protected AbstractHttpClient(RestServerParameters restServerParameters) {
try {
final String scheme = restServerParameters.isHttps() ? "https" : "http";
target = new HttpHost(restServerParameters.getHost(), restServerParameters.getPort(), scheme);
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(new AuthScope(target.getHostName(), target.getPort()),
new UsernamePasswordCredentials(restServerParameters.getUserName(),
restServerParameters.getPassword()));
AuthCache authCache = new BasicAuthCache();
BasicScheme basicAuth = new BasicScheme();
authCache.put(target, basicAuth);
localContext = HttpClientContext.create();
localContext.setAuthCache(authCache);
HttpClientBuilder builder = HttpClients.custom().setDefaultCredentialsProvider(credsProvider);
if (restServerParameters.isHttps()) {
final SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(new SSLContextBuilder()
.loadTrustMaterial(null, new TrustSelfSignedStrategy()).setProtocol("TLSv1.2").build(),
new NoopHostnameVerifier());
builder.setSSLSocketFactory(sslsf);
}
httpclient = builder.build();
} catch (final Exception e) {
throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR,
restServerParameters.getName() + " Client failed to start", e);
}
}
CloseableHttpResponse execute(HttpRequest request) throws IOException {
return httpclient.execute(target, request, localContext);
}
protected boolean executePut(String path, int statusCode) {
try (CloseableHttpResponse response = execute(new HttpPut(path))) {
return response.getStatusLine().getStatusCode() == statusCode;
} catch (Exception e) {
return false;
}
}
protected Loop executePost(String path, int statusCode) {
try (CloseableHttpResponse response = execute(new HttpPost(path))) {
if (response.getStatusLine().getStatusCode() != statusCode) {
return null;
}
return entityToMap(response.getEntity());
} catch (Exception e) {
return null;
}
}
protected Loop executeGet(String path, int statusCode) {
try (CloseableHttpResponse response = execute(new HttpGet(path))) {
if (response.getStatusLine().getStatusCode() != statusCode) {
return null;
}
return entityToMap(response.getEntity());
} catch (Exception e) {
return null;
}
}
private Loop entityToMap(HttpEntity httpEntity) {
if (httpEntity == null) {
return new Loop();
}
try {
return CODER.convert(EntityUtils.toString(httpEntity), Loop.class);
} catch (ParseException | IOException e) {
LOGGER.error("error reading Entity", e);
return new Loop();
} catch (CoderException e) {
LOGGER.error("cannot convert to Loop Object", e);
return new Loop();
}
}
@Override
public void close() throws IOException {
httpclient.close();
}
}
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