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  * Modifications Copyright (C) 2019 IBM.
   8  * ================================================================================
   9  * Licensed under the Apache License, Version 2.0 (the "License");
  10  * you may not use this file except in compliance with the License.
  11  * You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  * ============LICENSE_END=========================================================
  21  */
  22
  23 package org.onap.dmaap.dbcapi.client;
  24
  25 import java.io.BufferedReader;
  26 import java.io.IOException;
  27 import java.io.InputStream;
  28 import java.io.InputStreamReader;
  29 import java.io.OutputStream;
  30 import java.net.ProtocolException;
  31 import java.net.URL;
  32 import java.net.HttpURLConnection;
  33
  34 import javax.net.ssl.HttpsURLConnection;
  35 import javax.net.ssl.SSLException;
  36
  37 import org.apache.commons.codec.binary.Base64;
  38 import org.onap.dmaap.dbcapi.logging.BaseLoggingClass;
  39 import org.onap.dmaap.dbcapi.model.ApiError;
  40 import org.onap.dmaap.dbcapi.model.MR_Cluster;
  41 import org.onap.dmaap.dbcapi.util.DmaapConfig;
  42
  43 public class MrTopicConnection extends BaseLoggingClass  {
  44         private String topicURL;
  45
  46         private HttpURLConnection uc;
  47
  48
  49         private  String mmProvCred;
  50         private String unit_test;
  51         private boolean useAAF;
  52
  53
  54         public MrTopicConnection(String user, String pwd ) {
  55                 mmProvCred = new String( user + ":" + pwd );
  56                 DmaapConfig p = (DmaapConfig)DmaapConfig.getConfig();
  57         unit_test = p.getProperty( "UnitTest", "No" );
  58         useAAF= "true".equalsIgnoreCase(p.getProperty("UseAAF", "false"));
  59         }
  60
  61         public boolean makeTopicConnection( MR_Cluster cluster, String topic, String overrideFqdn ) {
  62                 String fqdn = overrideFqdn != null ? overrideFqdn : cluster.getFqdn();
  63                 logger.info( "connect to cluster: " + fqdn + " for topic: " + topic );
  64
  65
  66                 topicURL = cluster.getTopicProtocol() + "://" + fqdn + ":" + cluster.getTopicPort() + "/events/" + topic ;
  67
  68                 if ( "https".equals(cluster.getTopicProtocol())) {
  69                         return makeSecureConnection( topicURL );
  70                 }
  71                 return makeConnection( topicURL );
  72         }
  73
  74         private boolean makeSecureConnection( String pURL ) {
  75                 logger.info( "makeConnection to " + pURL );
  76
  77                 try {
  78                         URL u = new URL( pURL );
  79                         uc = (HttpsURLConnection) u.openConnection();
  80                         uc.setInstanceFollowRedirects(false);
  81                         logger.info( "open connection to " + pURL );
  82                         return(true);
  83                 } catch (Exception e) {
  84             logger.error("Unexpected error during openConnection of " + pURL );
  85             logger.error("Error", e);;
  86             return(false);
  87         }
  88
  89         }
  90         private boolean makeConnection( String pURL ) {
  91                 logger.info( "makeConnection to " + pURL );
  92
  93                 try {
  94                         URL u = new URL( pURL );
  95                         uc = (HttpURLConnection) u.openConnection();
  96                         uc.setInstanceFollowRedirects(false);
  97                         logger.info( "open connection to " + pURL );
  98                         return(true);
  99                 } catch (Exception e) {
 100             logger.error("Unexpected error during openConnection of " + pURL );
 101             logger.error("error", e);
 102             return(false);
 103         }
 104
 105         }
 106
 107         static String bodyToString( InputStream is ) {
 108                 StringBuilder sb = new StringBuilder();
 109                 BufferedReader br = new BufferedReader( new InputStreamReader(is));
 110                 String line;
 111                 try {
 112                         while ((line = br.readLine()) != null ) {
 113                                 sb.append( line );
 114                         }
 115                 } catch (IOException ex ) {
 116                         errorLogger.error( "IOexception:" + ex);
 117                 }
 118
 119                 return sb.toString();
 120         }
 121
 122         public ApiError doPostMessage( String postMessage ) {
 123                 ApiError response = new ApiError();
 124                 String auth =  "Basic " + Base64.encodeBase64String(mmProvCred.getBytes());
 125
 126
 127
 128                 try {
 129                         byte[] postData = postMessage.getBytes();
 130                         logger.info( "post fields=" + postMessage );
 131                         if ( useAAF ) {
 132                                 uc.setRequestProperty("Authorization", auth);
 133                                 logger.info( "Authenticating with " + auth );
 134                         }
 135                         uc.setRequestMethod("POST");
 136                         uc.setRequestProperty("Content-Type", "application/json");
 137                         uc.setRequestProperty( "charset", "utf-8");
 138                         uc.setRequestProperty( "Content-Length", Integer.toString( postData.length ));
 139                         uc.setUseCaches(false);
 140                         uc.setDoOutput(true);
 141                         OutputStream os = null;
 142
 143
 144                         try {
 145                  uc.connect();
 146                  os = uc.getOutputStream();
 147                  os.write( postData );
 148
 149             } catch (ProtocolException pe) {
 150                  // Rcvd error instead of 100-Continue
 151                 callSetDoOutputOnError();
 152
 153             }  catch ( SSLException se ) {
 154                 logger.error("Error", se);
 155                         response.setCode(500);
 156                         response.setMessage( se.getMessage());
 157                         return response;
 158
 159             }
 160                         response.setCode( uc.getResponseCode());
 161                         logger.info( "http response code:" + response.getCode());
 162             response.setMessage( uc.getResponseMessage() );
 163             logger.info( "response message=" + response.getMessage() );
 164
 165
 166             if ( response.getMessage() == null) {
 167                  // work around for glitch in Java 1.7.0.21 and likely others
 168                  // When Expect: 100 is set and a non-100 response is received, the response message is not set but the response code is
 169                  String h0 = uc.getHeaderField(0);
 170                  if (h0 != null) {
 171                      int i = h0.indexOf(' ');
 172                      int j = h0.indexOf(' ', i + 1);
 173                      if (i != -1 && j != -1) {
 174                          response.setMessage( h0.substring(j + 1) );
 175                      }
 176                  }
 177             }
 178             if ( response.is2xx() ) {
 179                         response.setFields( bodyToString( uc.getInputStream() ) );
 180                         logger.info( "responseBody=" + response.getFields() );
 181                         return response;
 182
 183             }
 184
 185                 } catch (Exception e) {
 186                 if ( unit_test.equals( "Yes" ) ) {
 187                                 response.setCode(200);
 188                                 response.setMessage( "simulated response");
 189                                 logger.info( "artificial 200 response from doPostMessage because unit_test =" + unit_test );
 190                 } else {
 191
 192                                 response.setCode(500);
 193                                 response.setMessage( "Unable to read response");
 194                                 logger.warn( response.getMessage() );
 195                 logger.error("Error", e);
 196                         }
 197         }
 198                 finally {
 199                         try {
 200                                 uc.disconnect();
 201                         } catch ( Exception e ) {
 202                                 logger.error("Error", e);
 203                         }
 204                 }
 205                 return response;
 206
 207         }
 208
 209         public void callSetDoOutputOnError() {
 210                 try {
 211             // work around glitch in Java 1.7.0.21 and likely others
 212             // without this, Java will connect multiple times to the server to run the same request
 213             uc.setDoOutput(false);
 214         } catch (Exception e) {
 215                 logger.error("Error", e);
 216         }
 217         }
 218
 219 }