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

   1 /*
   2  * ONAP-SO
   3  * ============LICENSE_START==========================================
   4  * ===================================================================
   5  * Copyright � 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  * ECOMP and OpenECOMP are trademarks
  21  * and service marks of AT&T Intellectual Property.
  22  *
  23  */
  24
  25 package com.woorea.openstack.connector;
  26
  27 import java.io.IOException;
  28 import java.net.URI;
  29 import java.net.URISyntaxException;
  30 import java.net.UnknownHostException;
  31 import java.util.List;
  32 import java.util.Map;
  33 import java.util.Map.Entry;
  34
  35 import org.apache.http.HttpEntity;
  36 import org.apache.http.HttpStatus;
  37 import org.apache.http.client.HttpResponseException;
  38 import org.apache.http.client.methods.CloseableHttpResponse;
  39 import org.apache.http.client.methods.HttpDelete;
  40 import org.apache.http.client.methods.HttpGet;
  41 import org.apache.http.client.methods.HttpPost;
  42 import org.apache.http.client.methods.HttpPut;
  43 import org.apache.http.client.methods.HttpUriRequest;
  44 import org.apache.http.client.utils.URIBuilder;
  45 import org.apache.http.entity.ContentType;
  46 import org.apache.http.entity.StringEntity;
  47 import org.apache.http.impl.client.CloseableHttpClient;
  48 import org.apache.http.impl.client.HttpClients;
  49 import org.apache.log4j.Logger;
  50 import org.codehaus.jackson.JsonProcessingException;
  51 import org.codehaus.jackson.map.DeserializationConfig;
  52 import org.codehaus.jackson.map.ObjectMapper;
  53 import org.codehaus.jackson.map.SerializationConfig;
  54 import org.codehaus.jackson.map.annotate.JsonRootName;
  55 import org.codehaus.jackson.map.annotate.JsonSerialize.Inclusion;
  56
  57 import com.woorea.openstack.base.client.OpenStackClientConnector;
  58 import com.woorea.openstack.base.client.OpenStackConnectException;
  59 import com.woorea.openstack.base.client.OpenStackRequest;
  60 import com.woorea.openstack.base.client.OpenStackResponse;
  61 import com.woorea.openstack.base.client.OpenStackResponseException;
  62
  63 public class HttpClientConnector implements OpenStackClientConnector {
  64
  65         public static ObjectMapper DEFAULT_MAPPER;
  66         public static ObjectMapper WRAPPED_MAPPER;
  67
  68         private static Logger LOGGER = Logger.getLogger(HttpClientConnector.class);
  69
  70         static {
  71                 DEFAULT_MAPPER = new ObjectMapper();
  72
  73                 DEFAULT_MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
  74                 DEFAULT_MAPPER.disable(SerializationConfig.Feature.INDENT_OUTPUT);
  75                 DEFAULT_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
  76                 DEFAULT_MAPPER.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
  77
  78                 WRAPPED_MAPPER = new ObjectMapper();
  79
  80                 WRAPPED_MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
  81                 WRAPPED_MAPPER.disable(SerializationConfig.Feature.INDENT_OUTPUT);
  82                 WRAPPED_MAPPER.enable(SerializationConfig.Feature.WRAP_ROOT_VALUE);
  83                 WRAPPED_MAPPER.enable(DeserializationConfig.Feature.UNWRAP_ROOT_VALUE);
  84                 WRAPPED_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
  85                 WRAPPED_MAPPER.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
  86         }
  87
  88         protected static <T> ObjectMapper getObjectMapper (Class<T> type) {
  89                 return type.getAnnotation(JsonRootName.class) == null ? DEFAULT_MAPPER : WRAPPED_MAPPER;
  90         }
  91
  92         @Override
  93         public <T> OpenStackResponse request(OpenStackRequest<T> request) {
  94
  95                 CloseableHttpClient httpClient = null; //HttpClients.createDefault();
  96                 httpClient = HttpClients.custom().setRedirectStrategy(new HttpClientRedirectStrategy()).build();
  97
  98                 URI uri = null;
  99
 100                 // Build the URI with query params
 101                 try {
 102                         URIBuilder uriBuilder = new URIBuilder(request.endpoint() + request.path());
 103
 104                         for(Map.Entry<String, List<Object> > entry : request.queryParams().entrySet()) {
 105                                 for (Object o : entry.getValue()) {
 106                                         uriBuilder.setParameter(entry.getKey(), String.valueOf(o));
 107                                 }
 108                         }
 109
 110                         uri = uriBuilder.build();
 111                 } catch (URISyntaxException e) {
 112                         throw new HttpClientException (e);
 113                 }
 114
 115                 HttpEntity entity = null;
 116                 if (request.entity() != null) {
 117                         // Flatten the entity to a Json string
 118
 119                         try {
 120                         // Get appropriate mapper, based on existence of a root element in Entity class
 121                                 ObjectMapper mapper = getObjectMapper (request.entity().getEntity().getClass());
 122
 123                                 String entityJson = mapper.writeValueAsString (request.entity().getEntity());
 124                                 entity = new StringEntity(entityJson, ContentType.create(request.entity().getContentType()));
 125
 126                                 LOGGER.debug("Openstack query JSON:"+entityJson);
 127                                 LOGGER.debug ("Request JSON Body: " + entityJson.replaceAll("\"password\":\"[^\"]*\"", "\"password\":\"***\""));
 128
 129                         } catch (JsonProcessingException e) {
 130                                 throw new HttpClientException ("Json processing error on request entity", e);
 131                         } catch (IOException e) {
 132                                 throw new HttpClientException ("Json IO error on request entity", e);
 133                         }
 134                 }
 135
 136                 // Determine the HttpRequest class based on the method
 137                 HttpUriRequest httpRequest;
 138
 139                 switch (request.method()) {
 140                 case POST:
 141                         HttpPost post = new HttpPost(uri);
 142                         post.setEntity (entity);
 143                         httpRequest = post;
 144                         break;
 145
 146                 case GET:
 147                         httpRequest = new HttpGet(uri);
 148                         break;
 149
 150                 case PUT:
 151                         HttpPut put = new HttpPut(uri);
 152                         put.setEntity (entity);
 153                         httpRequest = put;
 154                         break;
 155
 156                 case DELETE:
 157                         httpRequest = new HttpDelete(uri);
 158                         break;
 159
 160                 default:
 161                         throw new HttpClientException ("Unrecognized HTTP Method: " + request.method());
 162                 }
 163
 164                 for (Entry<String, List<Object>> h : request.headers().entrySet()) {
 165                         StringBuilder sb = new StringBuilder();
 166                         for (Object v : h.getValue()) {
 167                                 sb.append(String.valueOf(v));
 168                         }
 169                         httpRequest.addHeader(h.getKey(), sb.toString());
 170                 }
 171
 172                 LOGGER.debug ("Sending HTTP request: " + httpRequest.toString());
 173
 174                 // Get the Response.  But don't get the body entity yet, as this response
 175                 // will be wrapped in an HttpClientResponse.  The HttpClientResponse
 176                 // buffers the body in constructor, so can close the response here.
 177                 HttpClientResponse httpClientResponse = null;
 178                 CloseableHttpResponse httpResponse = null;
 179
 180                 // Catch known HttpClient exceptions, and wrap them in OpenStack Client Exceptions
 181                 // so calling functions can distinguish.  Only RuntimeExceptions are allowed.
 182                 try {
 183                         httpResponse = httpClient.execute(httpRequest);
 184
 185                         LOGGER.debug ("Response status: " + httpResponse.getStatusLine().getStatusCode());
 186
 187                         httpClientResponse = new HttpClientResponse (httpResponse);
 188
 189                         int status = httpResponse.getStatusLine().getStatusCode();
 190                         if (status == HttpStatus.SC_OK || status == HttpStatus.SC_CREATED ||
 191                                 status == HttpStatus.SC_NO_CONTENT || status == HttpStatus.SC_ACCEPTED)
 192                         {
 193                                 return httpClientResponse;
 194                         }
 195                 }
 196                 catch (HttpResponseException e) {
 197                         // What exactly does this mean?  It does not appear to get thrown for
 198                         // non-2XX responses as documented.
 199                         throw new OpenStackResponseException(e.getMessage(), e.getStatusCode());
 200                 }
 201                 catch (UnknownHostException e) {
 202                         throw new OpenStackConnectException("Unknown Host: " + e.getMessage());
 203                 }
 204                 catch (IOException e) {
 205                         // Catch all other IOExceptions and throw as OpenStackConnectException
 206                         throw new OpenStackConnectException(e.getMessage());
 207                 }
 208                 catch (Exception e) {
 209                         // Catchall for anything else, must throw as a RuntimeException
 210                         LOGGER.error ("Unexpected client exception: " +e.getMessage());
 211                         throw new RuntimeException("Unexpected client exception", e);
 212                 }
 213                 finally {
 214                         // Have the body.  Close the stream
 215                         if (httpResponse != null)
 216                                 try {
 217                                         httpResponse.close();
 218                                 } catch (IOException e) {
 219                                         LOGGER.warn("Unable to close HTTP Response: " + e);
 220                                 }
 221                 }
 222
 223                 // Get here on an error response (4XX-5XX)
 224                 throw new OpenStackResponseException(httpResponse.getStatusLine().getReasonPhrase(),
 225                                                                                         httpResponse.getStatusLine().getStatusCode(),
 226                                                                                         httpClientResponse);
 227         }
 228
 229 }