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/*
* ONAP-SO
* ============LICENSE_START==========================================
* ===================================================================
* Copyright � 2017 AT&T Intellectual Property. All rights reserved.
* ===================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END============================================
*
* ECOMP and OpenECOMP are trademarks
* and service marks of AT&T Intellectual Property.
*
*/
package com.woorea.openstack.connector;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.UnknownHostException;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpResponseException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.log4j.Logger;
import org.codehaus.jackson.JsonProcessingException;
import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
import org.codehaus.jackson.map.annotate.JsonRootName;
import org.codehaus.jackson.map.annotate.JsonSerialize.Inclusion;
import com.woorea.openstack.base.client.OpenStackClientConnector;
import com.woorea.openstack.base.client.OpenStackConnectException;
import com.woorea.openstack.base.client.OpenStackRequest;
import com.woorea.openstack.base.client.OpenStackResponse;
import com.woorea.openstack.base.client.OpenStackResponseException;
public class HttpClientConnector implements OpenStackClientConnector {
public static ObjectMapper DEFAULT_MAPPER;
public static ObjectMapper WRAPPED_MAPPER;
private static Logger LOGGER = Logger.getLogger(HttpClientConnector.class);
static {
DEFAULT_MAPPER = new ObjectMapper();
DEFAULT_MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
DEFAULT_MAPPER.disable(SerializationConfig.Feature.INDENT_OUTPUT);
DEFAULT_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
DEFAULT_MAPPER.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
WRAPPED_MAPPER = new ObjectMapper();
WRAPPED_MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
WRAPPED_MAPPER.disable(SerializationConfig.Feature.INDENT_OUTPUT);
WRAPPED_MAPPER.enable(SerializationConfig.Feature.WRAP_ROOT_VALUE);
WRAPPED_MAPPER.enable(DeserializationConfig.Feature.UNWRAP_ROOT_VALUE);
WRAPPED_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
WRAPPED_MAPPER.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
}
protected static <T> ObjectMapper getObjectMapper (Class<T> type) {
return type.getAnnotation(JsonRootName.class) == null ? DEFAULT_MAPPER : WRAPPED_MAPPER;
}
@Override
public <T> OpenStackResponse request(OpenStackRequest<T> request) {
CloseableHttpClient httpClient = null; //HttpClients.createDefault();
httpClient = HttpClients.custom().setRedirectStrategy(new HttpClientRedirectStrategy()).build();
URI uri = null;
// Build the URI with query params
try {
URIBuilder uriBuilder = new URIBuilder(request.endpoint() + request.path());
for(Map.Entry<String, List<Object> > entry : request.queryParams().entrySet()) {
for (Object o : entry.getValue()) {
uriBuilder.setParameter(entry.getKey(), String.valueOf(o));
}
}
uri = uriBuilder.build();
} catch (URISyntaxException e) {
throw new HttpClientException (e);
}
HttpEntity entity = null;
if (request.entity() != null) {
// Flatten the entity to a Json string
try {
// Get appropriate mapper, based on existence of a root element in Entity class
ObjectMapper mapper = getObjectMapper (request.entity().getEntity().getClass());
String entityJson = mapper.writeValueAsString (request.entity().getEntity());
entity = new StringEntity(entityJson, ContentType.create(request.entity().getContentType()));
LOGGER.debug("Openstack query JSON:"+entityJson);
LOGGER.debug ("Request JSON Body: " + entityJson.replaceAll("\"password\":\"[^\"]*\"", "\"password\":\"***\""));
} catch (JsonProcessingException e) {
throw new HttpClientException ("Json processing error on request entity", e);
} catch (IOException e) {
throw new HttpClientException ("Json IO error on request entity", e);
}
}
// Determine the HttpRequest class based on the method
HttpUriRequest httpRequest;
switch (request.method()) {
case POST:
HttpPost post = new HttpPost(uri);
post.setEntity (entity);
httpRequest = post;
break;
case GET:
httpRequest = new HttpGet(uri);
break;
case PUT:
HttpPut put = new HttpPut(uri);
put.setEntity (entity);
httpRequest = put;
break;
case DELETE:
httpRequest = new HttpDelete(uri);
break;
default:
throw new HttpClientException ("Unrecognized HTTP Method: " + request.method());
}
for (Entry<String, List<Object>> h : request.headers().entrySet()) {
StringBuilder sb = new StringBuilder();
for (Object v : h.getValue()) {
sb.append(String.valueOf(v));
}
httpRequest.addHeader(h.getKey(), sb.toString());
}
LOGGER.debug ("Sending HTTP request: " + httpRequest.toString());
// Get the Response. But don't get the body entity yet, as this response
// will be wrapped in an HttpClientResponse. The HttpClientResponse
// buffers the body in constructor, so can close the response here.
HttpClientResponse httpClientResponse = null;
CloseableHttpResponse httpResponse = null;
// Catch known HttpClient exceptions, and wrap them in OpenStack Client Exceptions
// so calling functions can distinguish. Only RuntimeExceptions are allowed.
try {
httpResponse = httpClient.execute(httpRequest);
LOGGER.debug ("Response status: " + httpResponse.getStatusLine().getStatusCode());
httpClientResponse = new HttpClientResponse (httpResponse);
int status = httpResponse.getStatusLine().getStatusCode();
if (status == HttpStatus.SC_OK || status == HttpStatus.SC_CREATED ||
status == HttpStatus.SC_NO_CONTENT || status == HttpStatus.SC_ACCEPTED)
{
return httpClientResponse;
}
}
catch (HttpResponseException e) {
// What exactly does this mean? It does not appear to get thrown for
// non-2XX responses as documented.
throw new OpenStackResponseException(e.getMessage(), e.getStatusCode());
}
catch (UnknownHostException e) {
throw new OpenStackConnectException("Unknown Host: " + e.getMessage());
}
catch (IOException e) {
// Catch all other IOExceptions and throw as OpenStackConnectException
throw new OpenStackConnectException(e.getMessage());
}
catch (Exception e) {
// Catchall for anything else, must throw as a RuntimeException
LOGGER.error ("Unexpected client exception: " +e.getMessage());
throw new RuntimeException("Unexpected client exception", e);
}
finally {
// Have the body. Close the stream
if (httpResponse != null)
try {
httpResponse.close();
} catch (IOException e) {
LOGGER.warn("Unable to close HTTP Response: " + e);
}
}
// Get here on an error response (4XX-5XX)
throw new OpenStackResponseException(httpResponse.getStatusLine().getReasonPhrase(),
httpResponse.getStatusLine().getStatusCode(),
httpClientResponse);
}
}
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