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
  31 import javax.net.ssl.HttpsURLConnection;
  32 import javax.net.ssl.SSLException;
  33
  34 import org.apache.commons.codec.binary.Base64;
  35 import org.apache.log4j.Logger;
  36 import org.onap.dmaap.dbcapi.logging.BaseLoggingClass;
  37 import org.onap.dmaap.dbcapi.model.ApiError;
  38 import org.onap.dmaap.dbcapi.model.MR_Cluster;
  39 import org.onap.dmaap.dbcapi.util.DmaapConfig;
  40
  41 public class MrTopicConnection extends BaseLoggingClass  {
  42         private String topicURL;
  43
  44         private HttpsURLConnection uc;
  45
  46
  47         private  String mmProvCred;
  48         private String unit_test;
  49
  50
  51
  52         public MrTopicConnection(String user, String pwd ) {
  53                 mmProvCred = new String( user + ":" + pwd );
  54                 DmaapConfig p = (DmaapConfig)DmaapConfig.getConfig();
  55         unit_test = p.getProperty( "UnitTest", "No" );
  56         }
  57
  58         public boolean makeTopicConnection( MR_Cluster cluster, String topic, String overrideFqdn ) {
  59                 String fqdn = overrideFqdn != null ? overrideFqdn : cluster.getFqdn();
  60                 logger.info( "connect to cluster: " + fqdn + " for topic: " + topic );
  61
  62
  63                 topicURL = cluster.getTopicProtocol() + "://" + fqdn + ":" + cluster.getTopicPort() + "/events/" + topic ;
  64
  65                 return makeConnection( topicURL );
  66         }
  67
  68         private boolean makeConnection( String pURL ) {
  69                 logger.info( "makeConnection to " + pURL );
  70
  71                 try {
  72                         URL u = new URL( pURL );
  73                         uc = (HttpsURLConnection) u.openConnection();
  74                         uc.setInstanceFollowRedirects(false);
  75                         logger.info( "open connection to " + pURL );
  76                         return(true);
  77                 } catch (Exception e) {
  78             logger.error("Unexpected error during openConnection of " + pURL );
  79             e.printStackTrace();
  80             return(false);
  81         }
  82
  83         }
  84
  85         static String bodyToString( InputStream is ) {
  86                 StringBuilder sb = new StringBuilder();
  87                 BufferedReader br = new BufferedReader( new InputStreamReader(is));
  88                 String line;
  89                 try {
  90                         while ((line = br.readLine()) != null ) {
  91                                 sb.append( line );
  92                         }
  93                 } catch (IOException ex ) {
  94                         errorLogger.error( "IOexception:" + ex);
  95                 }
  96
  97                 return sb.toString();
  98         }
  99
 100         public ApiError doPostMessage( String postMessage ) {
 101                 ApiError response = new ApiError();
 102                 String auth =  "Basic " + Base64.encodeBase64String(mmProvCred.getBytes());
 103
 104
 105
 106                 try {
 107                         byte[] postData = postMessage.getBytes();
 108                         logger.info( "post fields=" + postMessage );
 109                         uc.setRequestProperty("Authorization", auth);
 110                         logger.info( "Authenticating with " + auth );
 111                         uc.setRequestMethod("POST");
 112                         uc.setRequestProperty("Content-Type", "application/json");
 113                         uc.setRequestProperty( "charset", "utf-8");
 114                         uc.setRequestProperty( "Content-Length", Integer.toString( postData.length ));
 115                         uc.setUseCaches(false);
 116                         uc.setDoOutput(true);
 117                         OutputStream os = null;
 118
 119
 120                         try {
 121                  uc.connect();
 122                  os = uc.getOutputStream();
 123                  os.write( postData );
 124
 125             } catch (ProtocolException pe) {
 126                  // Rcvd error instead of 100-Continue
 127                  try {
 128                      // work around glitch in Java 1.7.0.21 and likely others
 129                      // without this, Java will connect multiple times to the server to run the same request
 130                      uc.setDoOutput(false);
 131                  } catch (Exception e) {
 132                  }
 133             }  catch ( SSLException se ) {
 134                         response.setCode(500);
 135                         response.setMessage( se.getMessage());
 136                         return response;
 137
 138             }
 139                         response.setCode( uc.getResponseCode());
 140                         logger.info( "http response code:" + response.getCode());
 141             response.setMessage( uc.getResponseMessage() );
 142             logger.info( "response message=" + response.getMessage() );
 143
 144
 145             if ( response.getMessage() == null) {
 146                  // work around for glitch in Java 1.7.0.21 and likely others
 147                  // When Expect: 100 is set and a non-100 response is received, the response message is not set but the response code is
 148                  String h0 = uc.getHeaderField(0);
 149                  if (h0 != null) {
 150                      int i = h0.indexOf(' ');
 151                      int j = h0.indexOf(' ', i + 1);
 152                      if (i != -1 && j != -1) {
 153                          response.setMessage( h0.substring(j + 1) );
 154                      }
 155                  }
 156             }
 157             if ( response.is2xx() ) {
 158                         response.setFields( bodyToString( uc.getInputStream() ) );
 159                         logger.info( "responseBody=" + response.getFields() );
 160                         return response;
 161
 162             }
 163
 164                 } catch (Exception e) {
 165                 if ( unit_test.equals( "Yes" ) ) {
 166                                 response.setCode(200);
 167                                 response.setMessage( "simulated response");
 168                                 logger.info( "artificial 200 response from doPostMessage because unit_test =" + unit_test );
 169                 } else {
 170
 171                                 response.setCode(500);
 172                                 response.setMessage( "Unable to read response");
 173                                 logger.warn( response.getMessage() );
 174                 e.printStackTrace();
 175                         }
 176         }
 177                 finally {
 178                         try {
 179                                 uc.disconnect();
 180                         } catch ( Exception e ) {}
 181                 }
 182                 return response;
 183
 184         }
 185
 186 }