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/*-
* ============LICENSE_START=======================================================
* openECOMP : SDN-C
* ================================================================================
* 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=========================================================
*/
package org.onap.ccsdk.sli.adaptors.resource.mdsal;
import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.*;
import java.net.Authenticator;
import java.net.HttpURLConnection;
import java.net.PasswordAuthentication;
import java.net.URL;
public class RestService {
private static final Logger LOG = LoggerFactory.getLogger(ConfigResource.class);
private String user;
private String passwd;
private String contentType;
private String accept;
private String protocol;
private String host;
private String port;
public RestService(String protocol, String host, String port, String user, String passwd, String accept, String contentType) {
this.protocol = protocol;
this.host = host;
this.port = port;
this.user = user;
this.passwd = passwd;
this.accept = accept;
this.contentType = contentType;
}
private HttpURLConnection getRestConnection(String urlString, String method) throws IOException {
URL sdncUrl = new URL(urlString);
Authenticator.setDefault(new SdncAuthenticator(user, passwd));
String authStr = user + ":" + passwd;
String encodedAuthStr = new String(Base64.encodeBase64(authStr.getBytes()));
HttpURLConnection conn = (HttpURLConnection) sdncUrl.openConnection();
conn.addRequestProperty("Authentication", "Basic " + encodedAuthStr);
conn.setRequestMethod(method);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
//Setting Accept header (doesn't dependent on Msg Body if present or not)
if ("XML".equalsIgnoreCase(accept)) {
conn.setRequestProperty("Accept", "application/xml");
} else {
conn.setRequestProperty("Accept", "application/json");
}
return (conn);
}
private Document send(String urlString, byte[] msgBytes, String method) {
Document response = null;
String fullUrl = protocol + "://" + host + ":" + port + "/" + urlString;
LOG.info("Sending REST {} to {}", method, fullUrl);
try {
HttpURLConnection conn = getRestConnection(fullUrl, method);
if (conn instanceof HttpsURLConnection) {
HostnameVerifier hostnameVerifier = (hostname, session) -> true;
((HttpsURLConnection) conn).setHostnameVerifier(hostnameVerifier);
}
// Write message
if (msgBytes != null) {
LOG.info("Message body:\n{}", msgBytes);
conn.setRequestProperty("Content-Length", "" + msgBytes.length);
// Setting Content-Type header only if Msg Body is present
if ("XML".equalsIgnoreCase(contentType)) {
conn.setRequestProperty("Content-Type", "application/xml");
} else {
conn.setRequestProperty("Content-Type", "application/json");
}
DataOutputStream outStr = new DataOutputStream(conn.getOutputStream());
outStr.write(msgBytes);
outStr.close();
} else {
conn.setRequestProperty("Content-Length", "0");
}
// Read response
LOG.info("Response: {} {}", conn.getResponseCode(), conn.getResponseMessage());
BufferedReader respRdr;
if (conn.getResponseCode() < 300) {
respRdr = new BufferedReader(new InputStreamReader(conn.getInputStream()));
} else {
respRdr = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
}
StringBuffer respBuff = new StringBuffer();
String respLn;
while ((respLn = respRdr.readLine()) != null) {
respBuff.append(respLn + "\n");
}
respRdr.close();
String respString = respBuff.toString();
LOG.info("Response body :\n{}", respString);
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
dbf.setFeature("http://xml.org/sax/features/external-general-entities", false);
dbf.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
DocumentBuilder db = dbf.newDocumentBuilder();
response = db.parse(new ByteArrayInputStream(respString.getBytes()));
} catch (Exception e) {
LOG.error("Caught exception executing REST command", e);
}
return (response);
}
public Document get(String urlString) {
return (send(urlString, null, "GET"));
}
public Document delete(String urlString) {
return (send(urlString, null, "DELETE"));
}
public Document post(String urlString, byte[] msgBytes) {
return (send(urlString, msgBytes, "POST"));
}
public Document put(String urlString, byte[] msgBytes) {
return (send(urlString, msgBytes, "PUT"));
}
private class SdncAuthenticator extends Authenticator {
private String user;
private String passwd;
SdncAuthenticator(String user, String passwd) {
this.user = user;
this.passwd = passwd;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, passwd.toCharArray());
}
}
}
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