src/main/java/org/onap/dmaap/dbcapi/client/MrTopicConnection.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * org.onap.dmaap
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.dmaap.dbcapi.client;
  22
  23 import java.io.BufferedReader;
  24 import java.io.IOException;
  25 import java.io.InputStream;
  26 import java.io.InputStreamReader;
  27 import java.io.OutputStream;
  28 import java.net.ProtocolException;
  29 import java.net.URL;
  30 import java.net.HttpURLConnection;
  31
  32 import javax.net.ssl.HttpsURLConnection;
  33 import javax.net.ssl.SSLException;
  34
  35 import org.apache.commons.codec.binary.Base64;
  36 import org.apache.log4j.Logger;
  37 import org.onap.dmaap.dbcapi.logging.BaseLoggingClass;
  38 import org.onap.dmaap.dbcapi.model.ApiError;
  39 import org.onap.dmaap.dbcapi.model.MR_Cluster;
  40 import org.onap.dmaap.dbcapi.util.DmaapConfig;
  41
  42 public class MrTopicConnection extends BaseLoggingClass  {
  43         private String topicURL;
  44
  45         private HttpURLConnection uc;
  46
  47
  48         private  String mmProvCred;
  49         private String unit_test;
  50
  51
  52
  53         public MrTopicConnection(String user, String pwd ) {
  54                 mmProvCred = new String( user + ":" + pwd );
  55                 DmaapConfig p = (DmaapConfig)DmaapConfig.getConfig();
  56         unit_test = p.getProperty( "UnitTest", "No" );
  57         }
  58
  59         public boolean makeTopicConnection( MR_Cluster cluster, String topic, String overrideFqdn ) {
  60                 String fqdn = overrideFqdn != null ? overrideFqdn : cluster.getFqdn();
  61                 logger.info( "connect to cluster: " + fqdn + " for topic: " + topic );
  62
  63
  64                 topicURL = cluster.getTopicProtocol() + "://" + fqdn + ":" + cluster.getTopicPort() + "/events/" + topic ;
  65
  66                 if ( cluster.getTopicProtocol().equals( "https")) {
  67                         return makeSecureConnection( topicURL );
  68                 }
  69                 return makeConnection( topicURL );
  70         }
  71
  72         private boolean makeSecureConnection( String pURL ) {
  73                 logger.info( "makeConnection to " + pURL );
  74
  75                 try {
  76                         URL u = new URL( pURL );
  77                         uc = (HttpsURLConnection) u.openConnection();
  78                         uc.setInstanceFollowRedirects(false);
  79                         logger.info( "open connection to " + pURL );
  80                         return(true);
  81                 } catch (Exception e) {
  82             logger.error("Unexpected error during openConnection of " + pURL );
  83             e.printStackTrace();
  84             return(false);
  85         }
  86
  87         }
  88         private boolean makeConnection( String pURL ) {
  89                 logger.info( "makeConnection to " + pURL );
  90
  91                 try {
  92                         URL u = new URL( pURL );
  93                         uc = (HttpURLConnection) u.openConnection();
  94                         uc.setInstanceFollowRedirects(false);
  95                         logger.info( "open connection to " + pURL );
  96                         return(true);
  97                 } catch (Exception e) {
  98             logger.error("Unexpected error during openConnection of " + pURL );
  99             e.printStackTrace();
 100             return(false);
 101         }
 102
 103         }
 104
 105         static String bodyToString( InputStream is ) {
 106                 StringBuilder sb = new StringBuilder();
 107                 BufferedReader br = new BufferedReader( new InputStreamReader(is));
 108                 String line;
 109                 try {
 110                         while ((line = br.readLine()) != null ) {
 111                                 sb.append( line );
 112                         }
 113                 } catch (IOException ex ) {
 114                         errorLogger.error( "IOexception:" + ex);
 115                 }
 116
 117                 return sb.toString();
 118         }
 119
 120         public ApiError doPostMessage( String postMessage ) {
 121                 ApiError response = new ApiError();
 122                 String auth =  "Basic " + Base64.encodeBase64String(mmProvCred.getBytes());
 123
 124
 125
 126                 try {
 127                         byte[] postData = postMessage.getBytes();
 128                         logger.info( "post fields=" + postMessage );
 129                         uc.setRequestProperty("Authorization", auth);
 130                         logger.info( "Authenticating with " + auth );
 131                         uc.setRequestMethod("POST");
 132                         uc.setRequestProperty("Content-Type", "application/json");
 133                         uc.setRequestProperty( "charset", "utf-8");
 134                         uc.setRequestProperty( "Content-Length", Integer.toString( postData.length ));
 135                         uc.setUseCaches(false);
 136                         uc.setDoOutput(true);
 137                         OutputStream os = null;
 138
 139
 140                         try {
 141                  uc.connect();
 142                  os = uc.getOutputStream();
 143                  os.write( postData );
 144
 145             } catch (ProtocolException pe) {
 146                  // Rcvd error instead of 100-Continue
 147                  try {
 148                      // work around glitch in Java 1.7.0.21 and likely others
 149                      // without this, Java will connect multiple times to the server to run the same request
 150                      uc.setDoOutput(false);
 151                  } catch (Exception e) {
 152                  }
 153             }  catch ( SSLException se ) {
 154                         response.setCode(500);
 155                         response.setMessage( se.getMessage());
 156                         return response;
 157
 158             }
 159                         response.setCode( uc.getResponseCode());
 160                         logger.info( "http response code:" + response.getCode());
 161             response.setMessage( uc.getResponseMessage() );
 162             logger.info( "response message=" + response.getMessage() );
 163
 164
 165             if ( response.getMessage() == null) {
 166                  // work around for glitch in Java 1.7.0.21 and likely others
 167                  // When Expect: 100 is set and a non-100 response is received, the response message is not set but the response code is
 168                  String h0 = uc.getHeaderField(0);
 169                  if (h0 != null) {
 170                      int i = h0.indexOf(' ');
 171                      int j = h0.indexOf(' ', i + 1);
 172                      if (i != -1 && j != -1) {
 173                          response.setMessage( h0.substring(j + 1) );
 174                      }
 175                  }
 176             }
 177             if ( response.is2xx() ) {
 178                         response.setFields( bodyToString( uc.getInputStream() ) );
 179                         logger.info( "responseBody=" + response.getFields() );
 180                         return response;
 181
 182             }
 183
 184                 } catch (Exception e) {
 185                 if ( unit_test.equals( "Yes" ) ) {
 186                                 response.setCode(200);
 187                                 response.setMessage( "simulated response");
 188                                 logger.info( "artificial 200 response from doPostMessage because unit_test =" + unit_test );
 189                 } else {
 190
 191                                 response.setCode(500);
 192                                 response.setMessage( "Unable to read response");
 193                                 logger.warn( response.getMessage() );
 194                 e.printStackTrace();
 195                         }
 196         }
 197                 finally {
 198                         try {
 199                                 uc.disconnect();
 200                         } catch ( Exception e ) {}
 201                 }
 202                 return response;
 203
 204         }
 205
 206 }