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         private boolean useAAF;
  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         useAAF= "true".equalsIgnoreCase(p.getProperty("UseAAF", "false"));
  58         }
  59
  60         public boolean makeTopicConnection( MR_Cluster cluster, String topic, String overrideFqdn ) {
  61                 String fqdn = overrideFqdn != null ? overrideFqdn : cluster.getFqdn();
  62                 logger.info( "connect to cluster: " + fqdn + " for topic: " + topic );
  63
  64
  65                 topicURL = cluster.getTopicProtocol() + "://" + fqdn + ":" + cluster.getTopicPort() + "/events/" + topic ;
  66
  67                 if ( cluster.getTopicProtocol().equals( "https")) {
  68                         return makeSecureConnection( topicURL );
  69                 }
  70                 return makeConnection( topicURL );
  71         }
  72
  73         private boolean makeSecureConnection( String pURL ) {
  74                 logger.info( "makeConnection to " + pURL );
  75
  76                 try {
  77                         URL u = new URL( pURL );
  78                         uc = (HttpsURLConnection) u.openConnection();
  79                         uc.setInstanceFollowRedirects(false);
  80                         logger.info( "open connection to " + pURL );
  81                         return(true);
  82                 } catch (Exception e) {
  83             logger.error("Unexpected error during openConnection of " + pURL );
  84             e.printStackTrace();
  85             return(false);
  86         }
  87
  88         }
  89         private boolean makeConnection( String pURL ) {
  90                 logger.info( "makeConnection to " + pURL );
  91
  92                 try {
  93                         URL u = new URL( pURL );
  94                         uc = (HttpURLConnection) u.openConnection();
  95                         uc.setInstanceFollowRedirects(false);
  96                         logger.info( "open connection to " + pURL );
  97                         return(true);
  98                 } catch (Exception e) {
  99             logger.error("Unexpected error during openConnection of " + pURL );
 100             e.printStackTrace();
 101             return(false);
 102         }
 103
 104         }
 105
 106         static String bodyToString( InputStream is ) {
 107                 StringBuilder sb = new StringBuilder();
 108                 BufferedReader br = new BufferedReader( new InputStreamReader(is));
 109                 String line;
 110                 try {
 111                         while ((line = br.readLine()) != null ) {
 112                                 sb.append( line );
 113                         }
 114                 } catch (IOException ex ) {
 115                         errorLogger.error( "IOexception:" + ex);
 116                 }
 117
 118                 return sb.toString();
 119         }
 120
 121         public ApiError doPostMessage( String postMessage ) {
 122                 ApiError response = new ApiError();
 123                 String auth =  "Basic " + Base64.encodeBase64String(mmProvCred.getBytes());
 124
 125
 126
 127                 try {
 128                         byte[] postData = postMessage.getBytes();
 129                         logger.info( "post fields=" + postMessage );
 130                         if ( useAAF ) {
 131                                 uc.setRequestProperty("Authorization", auth);
 132                                 logger.info( "Authenticating with " + auth );
 133                         }
 134                         uc.setRequestMethod("POST");
 135                         uc.setRequestProperty("Content-Type", "application/json");
 136                         uc.setRequestProperty( "charset", "utf-8");
 137                         uc.setRequestProperty( "Content-Length", Integer.toString( postData.length ));
 138                         uc.setUseCaches(false);
 139                         uc.setDoOutput(true);
 140                         OutputStream os = null;
 141
 142
 143                         try {
 144                  uc.connect();
 145                  os = uc.getOutputStream();
 146                  os.write( postData );
 147
 148             } catch (ProtocolException pe) {
 149                  // Rcvd error instead of 100-Continue
 150                  try {
 151                      // work around glitch in Java 1.7.0.21 and likely others
 152                      // without this, Java will connect multiple times to the server to run the same request
 153                      uc.setDoOutput(false);
 154                  } catch (Exception e) {
 155                  }
 156             }  catch ( SSLException se ) {
 157                         response.setCode(500);
 158                         response.setMessage( se.getMessage());
 159                         return response;
 160
 161             }
 162                         response.setCode( uc.getResponseCode());
 163                         logger.info( "http response code:" + response.getCode());
 164             response.setMessage( uc.getResponseMessage() );
 165             logger.info( "response message=" + response.getMessage() );
 166
 167
 168             if ( response.getMessage() == null) {
 169                  // work around for glitch in Java 1.7.0.21 and likely others
 170                  // When Expect: 100 is set and a non-100 response is received, the response message is not set but the response code is
 171                  String h0 = uc.getHeaderField(0);
 172                  if (h0 != null) {
 173                      int i = h0.indexOf(' ');
 174                      int j = h0.indexOf(' ', i + 1);
 175                      if (i != -1 && j != -1) {
 176                          response.setMessage( h0.substring(j + 1) );
 177                      }
 178                  }
 179             }
 180             if ( response.is2xx() ) {
 181                         response.setFields( bodyToString( uc.getInputStream() ) );
 182                         logger.info( "responseBody=" + response.getFields() );
 183                         return response;
 184
 185             }
 186
 187                 } catch (Exception e) {
 188                 if ( unit_test.equals( "Yes" ) ) {
 189                                 response.setCode(200);
 190                                 response.setMessage( "simulated response");
 191                                 logger.info( "artificial 200 response from doPostMessage because unit_test =" + unit_test );
 192                 } else {
 193
 194                                 response.setCode(500);
 195                                 response.setMessage( "Unable to read response");
 196                                 logger.warn( response.getMessage() );
 197                 e.printStackTrace();
 198                         }
 199         }
 200                 finally {
 201                         try {
 202                                 uc.disconnect();
 203                         } catch ( Exception e ) {}
 204                 }
 205                 return response;
 206
 207         }
 208
 209 }