src/main/java/org/onap/clamp/clds/client/DcaeHttpConnectionManager.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP CLAMP
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights
   6  *                             reserved.
   7  * ================================================================================
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  * http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  * ============LICENSE_END============================================
  20  * ===================================================================
  21  *
  22  */
  23
  24 package org.onap.clamp.clds.client;
  25
  26 import com.att.eelf.configuration.EELFLogger;
  27 import com.att.eelf.configuration.EELFManager;
  28
  29 import java.io.BufferedReader;
  30 import java.io.DataOutputStream;
  31 import java.io.IOException;
  32 import java.io.InputStreamReader;
  33 import java.net.HttpURLConnection;
  34 import java.net.URL;
  35
  36 import javax.net.ssl.HttpsURLConnection;
  37 import javax.ws.rs.BadRequestException;
  38
  39 import org.apache.commons.io.IOUtils;
  40 import org.onap.clamp.clds.util.LoggingUtils;
  41
  42 /**
  43  *
  44  * This class manages the HTTP and HTTPS connections to DCAE.
  45  *
  46  */
  47 public class DcaeHttpConnectionManager {
  48     protected static final EELFLogger logger                  = EELFManager.getInstance()
  49             .getLogger(DcaeHttpConnectionManager.class);
  50     protected static final EELFLogger metricsLogger           = EELFManager.getInstance().getMetricsLogger();
  51     private static final String       DCAE_REQUEST_FAILED_LOG = "Request Failed - response payload=";
  52
  53     private DcaeHttpConnectionManager() {
  54     }
  55
  56     private static String doHttpsQuery(URL url, String requestMethod, String payload, String contentType)
  57             throws IOException {
  58         logger.info("Using HTTPS URL to contact DCAE:" + url.toString());
  59         HttpsURLConnection secureConnection = (HttpsURLConnection) url.openConnection();
  60         secureConnection.setRequestMethod(requestMethod);
  61         secureConnection.setRequestProperty("X-ECOMP-RequestID", LoggingUtils.getRequestId());
  62         if (payload != null && contentType != null) {
  63             secureConnection.setRequestProperty("Content-Type", contentType);
  64             secureConnection.setDoOutput(true);
  65             try (DataOutputStream wr = new DataOutputStream(secureConnection.getOutputStream())) {
  66                 wr.writeBytes(payload);
  67                 wr.flush();
  68             }
  69         }
  70         int responseCode = secureConnection.getResponseCode();
  71         logger.info("Response Code: " + responseCode);
  72         if (responseCode < 400) {
  73             try (BufferedReader reader = new BufferedReader(new InputStreamReader(secureConnection.getInputStream()))) {
  74                 String responseStr = IOUtils.toString(reader);
  75                 logger.info("Response Content: " + responseStr);
  76                 return responseStr;
  77             }
  78         } else {
  79             // In case of connection failure just check whether there is a
  80             // content or not
  81             try (BufferedReader reader = new BufferedReader(new InputStreamReader(secureConnection.getErrorStream()))) {
  82                 String responseStr = IOUtils.toString(reader);
  83                 logger.error(DCAE_REQUEST_FAILED_LOG + responseStr);
  84                 throw new BadRequestException(responseStr);
  85             }
  86         }
  87     }
  88
  89     private static String doHttpQuery(URL url, String requestMethod, String payload, String contentType)
  90             throws IOException {
  91         logger.info("Using HTTP URL to contact DCAE:" + url);
  92         HttpURLConnection connection = (HttpURLConnection) url.openConnection();
  93         connection.setRequestMethod(requestMethod);
  94         connection.setRequestProperty("X-ECOMP-RequestID", LoggingUtils.getRequestId());
  95         if (payload != null && contentType != null) {
  96             connection.setRequestProperty("Content-Type", contentType);
  97             connection.setDoOutput(true);
  98             try (DataOutputStream wr = new DataOutputStream(connection.getOutputStream())) {
  99                 wr.writeBytes(payload);
 100                 wr.flush();
 101             }
 102         }
 103         int responseCode = connection.getResponseCode();
 104         logger.info("Response Code: " + responseCode);
 105         if (responseCode < 400) {
 106             try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
 107                 String responseStr = IOUtils.toString(reader);
 108                 logger.info("Response Content: " + responseStr);
 109                 return responseStr;
 110             }
 111         } else {
 112             // In case of connection failure just check whether there is a
 113             // content or not
 114             try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getErrorStream()))) {
 115                 String responseStr = IOUtils.toString(reader);
 116                 logger.error(DCAE_REQUEST_FAILED_LOG + responseStr);
 117                 throw new BadRequestException(responseStr);
 118             }
 119         }
 120     }
 121
 122     /**
 123      * This method does a HTTP/HTTPS query to DCAE with parameters specified.
 124      *
 125      * @param url
 126      *            The string HTTP or HTTPS that mustr be used to connect
 127      * @param requestMethod
 128      *            The Request Method (PUT, POST, GET, DELETE, etc ...)
 129      * @param payload
 130      *            The payload if any, in that case an ouputstream is opened
 131      * @param contentType
 132      *            The "application/json or application/xml, or whatever"
 133      * @return The payload of the answer
 134      * @throws IOException
 135      *             In case of issue with the streams
 136      */
 137     public static String doDcaeHttpQuery(String url, String requestMethod, String payload, String contentType)
 138             throws IOException {
 139         URL urlObj = new URL(url);
 140         if (url.contains("https://")) { // Support for HTTPS
 141             return doHttpsQuery(urlObj, requestMethod, payload, contentType);
 142         } else { // Support for HTTP
 143             return doHttpQuery(urlObj, requestMethod, payload, contentType);
 144         }
 145     }
 146 }