gerrit.onap Code Review - so/libs.git/blob

   1 /*
   2  * ============LICENSE_START==========================================
   3  * ===================================================================
   4  * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
   5  * ===================================================================
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *        http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  * ============LICENSE_END============================================
  18  *
  19  * ECOMP and OpenECOMP are trademarks
  20  * and service marks of AT&T Intellectual Property.
  21  *
  22  */
  23
  24 package com.woorea.openstack.connector;
  25
  26 import java.io.IOException;
  27 import java.net.URI;
  28 import java.net.URISyntaxException;
  29 import java.net.UnknownHostException;
  30 import java.util.List;
  31 import java.util.Map;
  32 import java.util.Map.Entry;
  33
  34 import org.apache.http.HttpEntity;
  35 import org.apache.http.HttpStatus;
  36 import org.apache.http.client.HttpResponseException;
  37 import org.apache.http.client.methods.CloseableHttpResponse;
  38 import org.apache.http.client.methods.HttpDelete;
  39 import org.apache.http.client.methods.HttpGet;
  40 import org.apache.http.client.methods.HttpPost;
  41 import org.apache.http.client.methods.HttpPut;
  42 import org.apache.http.client.methods.HttpUriRequest;
  43 import org.apache.http.client.utils.URIBuilder;
  44 import org.apache.http.entity.ContentType;
  45 import org.apache.http.entity.StringEntity;
  46 import org.apache.http.impl.client.CloseableHttpClient;
  47 import org.apache.http.impl.client.HttpClients;
  48 import org.apache.log4j.Logger;
  49 import org.codehaus.jackson.JsonProcessingException;
  50 import org.codehaus.jackson.map.DeserializationConfig;
  51 import org.codehaus.jackson.map.ObjectMapper;
  52 import org.codehaus.jackson.map.SerializationConfig;
  53 import org.codehaus.jackson.map.annotate.JsonRootName;
  54 import org.codehaus.jackson.map.annotate.JsonSerialize.Inclusion;
  55
  56 import com.woorea.openstack.base.client.OpenStackClientConnector;
  57 import com.woorea.openstack.base.client.OpenStackConnectException;
  58 import com.woorea.openstack.base.client.OpenStackRequest;
  59 import com.woorea.openstack.base.client.OpenStackResponse;
  60 import com.woorea.openstack.base.client.OpenStackResponseException;
  61
  62 public class HttpClientConnector implements OpenStackClientConnector {
  63
  64         public static ObjectMapper DEFAULT_MAPPER;
  65         public static ObjectMapper WRAPPED_MAPPER;
  66
  67         private static Logger LOGGER = Logger.getLogger(HttpClientConnector.class);
  68
  69         static {
  70                 DEFAULT_MAPPER = new ObjectMapper();
  71
  72                 DEFAULT_MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
  73                 DEFAULT_MAPPER.disable(SerializationConfig.Feature.INDENT_OUTPUT);
  74                 DEFAULT_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
  75                 DEFAULT_MAPPER.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
  76
  77                 WRAPPED_MAPPER = new ObjectMapper();
  78
  79                 WRAPPED_MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
  80                 WRAPPED_MAPPER.disable(SerializationConfig.Feature.INDENT_OUTPUT);
  81                 WRAPPED_MAPPER.enable(SerializationConfig.Feature.WRAP_ROOT_VALUE);
  82                 WRAPPED_MAPPER.enable(DeserializationConfig.Feature.UNWRAP_ROOT_VALUE);
  83                 WRAPPED_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
  84                 WRAPPED_MAPPER.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
  85         }
  86
  87         protected static <T> ObjectMapper getObjectMapper (Class<T> type) {
  88                 return type.getAnnotation(JsonRootName.class) == null ? DEFAULT_MAPPER : WRAPPED_MAPPER;
  89         }
  90
  91         public <T> OpenStackResponse request(OpenStackRequest<T> request) {
  92
  93                 CloseableHttpClient httpClient = null; //HttpClients.createDefault();
  94                 httpClient = HttpClients.custom().setRedirectStrategy(new HttpClientRedirectStrategy()).build();
  95
  96                 URI uri = null;
  97
  98                 // Build the URI with query params
  99                 try {
 100                         URIBuilder uriBuilder = new URIBuilder(request.endpoint() + request.path());
 101
 102                         for(Map.Entry<String, List<Object> > entry : request.queryParams().entrySet()) {
 103                                 for (Object o : entry.getValue()) {
 104                                         uriBuilder.setParameter(entry.getKey(), String.valueOf(o));
 105                                 }
 106                         }
 107
 108                         uri = uriBuilder.build();
 109                 } catch (URISyntaxException e) {
 110                         throw new HttpClientException (e);
 111                 }
 112
 113                 HttpEntity entity = null;
 114                 if (request.entity() != null) {
 115                         // Flatten the entity to a Json string
 116
 117                         try {
 118                         // Get appropriate mapper, based on existence of a root element in Entity class
 119                                 ObjectMapper mapper = getObjectMapper (request.entity().getEntity().getClass());
 120
 121                                 String entityJson = mapper.writeValueAsString (request.entity().getEntity());
 122                                 entity = new StringEntity(entityJson, ContentType.create(request.entity().getContentType()));
 123
 124                                 System.out.println("Openstack query JSON:"+entityJson);
 125                                 LOGGER.debug ("Request JSON Body: " + entityJson.replaceAll("\"password\":\"[^\"]*\"", "\"password\":\"***\""));
 126
 127                         } catch (JsonProcessingException e) {
 128                                 throw new HttpClientException ("Json processing error on request entity", e);
 129                         } catch (IOException e) {
 130                                 throw new HttpClientException ("Json IO error on request entity", e);
 131                         }
 132                 }
 133
 134                 // Determine the HttpRequest class based on the method
 135                 HttpUriRequest httpRequest;
 136
 137                 switch (request.method()) {
 138                 case POST:
 139                         HttpPost post = new HttpPost(uri);
 140                         post.setEntity (entity);
 141                         httpRequest = post;
 142                         break;
 143
 144                 case GET:
 145                         httpRequest = new HttpGet(uri);
 146                         break;
 147
 148                 case PUT:
 149                         HttpPut put = new HttpPut(uri);
 150                         put.setEntity (entity);
 151                         httpRequest = put;
 152                         break;
 153
 154                 case DELETE:
 155                         httpRequest = new HttpDelete(uri);
 156                         break;
 157
 158                 default:
 159                         throw new HttpClientException ("Unrecognized HTTP Method: " + request.method());
 160                 }
 161
 162                 for (Entry<String, List<Object>> h : request.headers().entrySet()) {
 163                         StringBuilder sb = new StringBuilder();
 164                         for (Object v : h.getValue()) {
 165                                 sb.append(String.valueOf(v));
 166                         }
 167                         httpRequest.addHeader(h.getKey(), sb.toString());
 168                 }
 169
 170                 LOGGER.debug ("Sending HTTP request: " + httpRequest.toString());
 171
 172                 // Get the Response.  But don't get the body entity yet, as this response
 173                 // will be wrapped in an HttpClientResponse.  The HttpClientResponse
 174                 // buffers the body in constructor, so can close the response here.
 175                 HttpClientResponse httpClientResponse = null;
 176                 CloseableHttpResponse httpResponse = null;
 177
 178                 // Catch known HttpClient exceptions, and wrap them in OpenStack Client Exceptions
 179                 // so calling functions can distinguish.  Only RuntimeExceptions are allowed.
 180                 try {
 181                         httpResponse = httpClient.execute(httpRequest);
 182
 183                         LOGGER.debug ("Response status: " + httpResponse.getStatusLine().getStatusCode());
 184
 185                         httpClientResponse = new HttpClientResponse (httpResponse);
 186
 187                         int status = httpResponse.getStatusLine().getStatusCode();
 188                         if (status == HttpStatus.SC_OK || status == HttpStatus.SC_CREATED ||
 189                                 status == HttpStatus.SC_NO_CONTENT || status == HttpStatus.SC_ACCEPTED)
 190                         {
 191                                 return httpClientResponse;
 192                         }
 193                 }
 194                 catch (HttpResponseException e) {
 195                         // What exactly does this mean?  It does not appear to get thrown for
 196                         // non-2XX responses as documented.
 197                         throw new OpenStackResponseException(e.getMessage(), e.getStatusCode());
 198                 }
 199                 catch (UnknownHostException e) {
 200                         throw new OpenStackConnectException("Unknown Host: " + e.getMessage());
 201                 }
 202                 catch (IOException e) {
 203                         // Catch all other IOExceptions and throw as OpenStackConnectException
 204                         throw new OpenStackConnectException(e.getMessage());
 205                 }
 206                 catch (Exception e) {
 207                         // Catchall for anything else, must throw as a RuntimeException
 208                         e.printStackTrace();
 209                         throw new RuntimeException("Unexpected client exception", e);
 210                 }
 211                 finally {
 212                         // Have the body.  Close the stream
 213                         if (httpResponse != null)
 214                                 try {
 215                                         httpResponse.close();
 216                                 } catch (IOException e) {
 217                                         LOGGER.warn("Unable to close HTTP Response: " + e);
 218                                 }
 219                 }
 220
 221                 // Get here on an error response (4XX-5XX)
 222                 throw new OpenStackResponseException(httpResponse.getStatusLine().getReasonPhrase(),
 223                                                                                         httpResponse.getStatusLine().getStatusCode(),
 224                                                                                         httpClientResponse);
 225         }
 226
 227 }