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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Huawei. All rights reserved.
* Modifications Copyright (C) 2019 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.apex.examples.bbs;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.StringWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.security.cert.X509Certificate;
import java.util.Base64;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
/**
* The Class WebClient act as rest client for BBS usecase.
*/
public class WebClient {
private static final XLogger LOGGER = XLoggerFactory.getXLogger(WebClient.class);
/**
* Disable ssl verification.
*/
private static void disableCertificateValidation() {
try {
TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(X509Certificate[] certs, String authType) {
}
}
};
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
HostnameVerifier allHostsValid = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession session) {
return true;
}
};
HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
} catch (Exception e) {
LOGGER.error("httpsRequest Exception " + e);
}
}
/**
* Send simple https rest request.
*
* @param requestUrl url
* @param requestMethod method eg POST/GET/PUT
* @param outputStr Data
* @param username Simple Username
* @param pass Simple password
* @param contentType http content type
* @param fillApp If required to fill app details
* @param disableSSl If disabling ssl checking
* @return String response message
*/
public String httpsRequest(String requestUrl, String requestMethod,
String outputStr, String username, String pass,
String contentType, boolean fillApp, boolean disableSSl) {
String result = "";
StringBuffer buffer = new StringBuffer();
try {
LOGGER.info("httpsRequest starts " + requestUrl + " method " + requestMethod);
if (disableSSl) {
disableCertificateValidation();
}
URL url = new URL(requestUrl);
HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
httpUrlConn.setDoOutput(true);
httpUrlConn.setDoInput(true);
httpUrlConn.setUseCaches(false);
if ((username != null) && (pass != null)) {
httpUrlConn.setRequestProperty("Authorization", getAuth(username, pass));
} else {
LOGGER.warn("Authorization information missing");
}
httpUrlConn.setRequestProperty("Content-Type", contentType);
httpUrlConn.setRequestProperty("Accept", contentType);
if (fillApp) {
httpUrlConn.setRequestProperty("X-FromAppId", "BBS Policy");
httpUrlConn.setRequestProperty("X-TransactionId", "BBS Policy");
}
httpUrlConn.setRequestMethod(requestMethod);
if ("GET".equalsIgnoreCase(requestMethod)) {
httpUrlConn.connect();
}
if (null != outputStr) {
OutputStream outputStream = httpUrlConn.getOutputStream();
outputStream.write(outputStr.getBytes(StandardCharsets.UTF_8));
outputStream.close();
}
try (InputStream inputStream = httpUrlConn.getInputStream()) {
try (InputStreamReader inputStreamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8)) {
try (BufferedReader bufferedReader = new BufferedReader(inputStreamReader)) {
String str;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
}
}
httpUrlConn.disconnect();
result = buffer.toString();
}
LOGGER.info("httpsRequest success ");
} catch (Exception ce) {
LOGGER.error("httpsRequest Exception " + ce);
}
return result;
}
/**
* Send simple https rest request.
*
* @param requestUrl url
* @param requestMethod method eg POST/GET/PUT
* @param outputStr Data
* @param username Simple Username
* @param pass Simple password
* @param contentType http content type
* @param fillApp If required to fill app details
* @param disableSSl If disabling ssl checking
* @return String response message
*/
public String httpRequest(String requestUrl, String requestMethod,
String outputStr, String username, String pass,
String contentType, boolean fillApp, boolean disableSSl) {
String result = "";
StringBuffer buffer = new StringBuffer();
try {
LOGGER.info("httpRequest starts " + requestUrl + " method " + requestMethod);
if (disableSSl) {
disableCertificateValidation();
}
URL url = new URL(requestUrl);
HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();
httpUrlConn.setDoOutput(true);
httpUrlConn.setDoInput(true);
httpUrlConn.setUseCaches(false);
if ((username != null) && (pass != null)) {
httpUrlConn.setRequestProperty("Authorization", getAuth(username, pass));
} else {
LOGGER.warn("Authorization information missing");
}
httpUrlConn.setRequestProperty("Content-Type", contentType);
httpUrlConn.setRequestProperty("Accept", contentType);
if (fillApp) {
httpUrlConn.setRequestProperty("X-FromAppId", "BBS Policy");
httpUrlConn.setRequestProperty("X-TransactionId", "BBS Policy");
}
httpUrlConn.setRequestMethod(requestMethod);
if ("GET".equalsIgnoreCase(requestMethod)) {
httpUrlConn.connect();
}
if (null != outputStr) {
OutputStream outputStream = httpUrlConn.getOutputStream();
outputStream.write(outputStr.getBytes(StandardCharsets.UTF_8));
outputStream.close();
}
try (InputStream inputStream = httpUrlConn.getInputStream()) {
try (InputStreamReader inputStreamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8)) {
try (BufferedReader bufferedReader = new BufferedReader(inputStreamReader)) {
String str;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
}
}
httpUrlConn.disconnect();
result = buffer.toString();
}
LOGGER.info("httpsRequest success ");
} catch (Exception ce) {
LOGGER.error("httpsRequest Exception " + ce);
}
return result;
}
/**
* Return Basic Authentication String.
*
* @param userName UserName
* @param password PassWord
* @return Basic Authentication
*/
private String getAuth(String userName, String password) {
String userCredentials = userName + ":" + password;
return ("Basic " + Base64.getEncoder().encodeToString(userCredentials.getBytes(StandardCharsets.UTF_8)));
}
/**
* Pretty print xml string.
*
* @param xml Input string
* @param indent Indent number
* @return Indented xml string
*/
public String toPrettyString(String xml, int indent) {
try {
try (ByteArrayInputStream br = new ByteArrayInputStream(xml.getBytes(StandardCharsets.UTF_8))) {
Document document = DocumentBuilderFactory.newInstance()
.newDocumentBuilder()
.parse(new InputSource(br));
document.normalize();
XPath path = XPathFactory.newInstance().newXPath();
NodeList nodeList = (NodeList) path.evaluate("//text()[normalize-space()='']",
document,
XPathConstants.NODESET);
for (int i = 0; i < nodeList.getLength(); ++i) {
Node node = nodeList.item(i);
node.getParentNode().removeChild(node);
}
TransformerFactory transformerFactory = TransformerFactory.newInstance();
transformerFactory.setAttribute("indent-number", indent);
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING, StandardCharsets.UTF_8.name());
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
StringWriter stringWriter = new StringWriter();
transformer.transform(new DOMSource(document), new StreamResult(stringWriter));
return stringWriter.toString();
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
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