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/*-
* ============LICENSE_START=======================================================
* ONAP CLAMP
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. 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============================================
* Modifications copyright (c) 2018 Nokia
* ===================================================================
*
*/
package org.onap.clamp.clds.client;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import javax.ws.rs.BadRequestException;
import org.apache.commons.io.IOUtils;
import org.onap.clamp.clds.util.LoggingUtils;
import org.springframework.stereotype.Component;
/**
*
* This class manages the HTTP and HTTPS connections to DCAE.
*
*/
@Component
public class DcaeHttpConnectionManager {
protected static final EELFLogger logger = EELFManager.getInstance()
.getLogger(DcaeHttpConnectionManager.class);
protected static final EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();
private static final String DCAE_REQUEST_FAILED_LOG = "Request Failed - response payload=";
private String doHttpsQuery(URL url, String requestMethod, String payload, String contentType)
throws IOException {
logger.info("Using HTTPS URL to contact DCAE:" + url.toString());
HttpsURLConnection secureConnection = (HttpsURLConnection) url.openConnection();
secureConnection.setRequestMethod(requestMethod);
secureConnection.setRequestProperty("X-ECOMP-RequestID", LoggingUtils.getRequestId());
if (payload != null && contentType != null) {
secureConnection.setRequestProperty("Content-Type", contentType);
secureConnection.setDoOutput(true);
try (DataOutputStream wr = new DataOutputStream(secureConnection.getOutputStream())) {
wr.writeBytes(payload);
wr.flush();
}
}
int responseCode = secureConnection.getResponseCode();
logger.info("Response Code: " + responseCode);
if (responseCode < 400) {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(secureConnection.getInputStream()))) {
String responseStr = IOUtils.toString(reader);
logger.info("Response Content: " + responseStr);
return responseStr;
}
} else {
// In case of connection failure just check whether there is a
// content or not
try (BufferedReader reader = new BufferedReader(new InputStreamReader(secureConnection.getErrorStream()))) {
String responseStr = IOUtils.toString(reader);
logger.error(DCAE_REQUEST_FAILED_LOG + responseStr);
throw new BadRequestException(responseStr);
}
}
}
private String doHttpQuery(URL url, String requestMethod, String payload, String contentType)
throws IOException {
LoggingUtils utils = new LoggingUtils (logger);
logger.info("Using HTTP URL to contact DCAE:" + url);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection = utils.invoke(connection,"DCAE", requestMethod);
connection.setRequestMethod(requestMethod);
connection.setRequestProperty("X-ECOMP-RequestID", LoggingUtils.getRequestId());
if (payload != null && contentType != null) {
connection.setRequestProperty("Content-Type", contentType);
connection.setDoOutput(true);
try (DataOutputStream wr = new DataOutputStream(connection.getOutputStream())) {
wr.writeBytes(payload);
wr.flush();
}
}
int responseCode = connection.getResponseCode();
logger.info("Response Code: " + responseCode);
if (responseCode < 400) {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
String responseStr = IOUtils.toString(reader);
logger.info("Response Content: " + responseStr);
utils.invokeReturn();
return responseStr;
}
} else {
// In case of connection failure just check whether there is a
// content or not
try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getErrorStream()))) {
String responseStr = IOUtils.toString(reader);
logger.error(DCAE_REQUEST_FAILED_LOG + responseStr);
utils.invokeReturn();
throw new BadRequestException(responseStr);
}
}
}
/**
* This method does a HTTP/HTTPS query to DCAE with parameters specified.
*
* @param url
* The string HTTP or HTTPS that mustr be used to connect
* @param requestMethod
* The Request Method (PUT, POST, GET, DELETE, etc ...)
* @param payload
* The payload if any, in that case an ouputstream is opened
* @param contentType
* The "application/json or application/xml, or whatever"
* @return The payload of the answer
* @throws IOException
* In case of issue with the streams
*/
public String doDcaeHttpQuery(String url, String requestMethod, String payload, String contentType)
throws IOException {
URL urlObj = new URL(url);
if (url.contains("https://")) { // Support for HTTPS
return doHttpsQuery(urlObj, requestMethod, payload, contentType);
} else { // Support for HTTP
return doHttpQuery(urlObj, requestMethod, payload, contentType);
}
}
}
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