1 files changed, 227 insertions, 0 deletions
diff --git a/openstack-client-connectors/http-connector/src/main/java/com/woorea/openstack/connector/HttpClientConnector.java b/openstack-client-connectors/http-connector/src/main/java/com/woorea/openstack/connector/HttpClientConnector.java
new file mode 100644
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--- /dev/null
+++ b/openstack-client-connectors/http-connector/src/main/java/com/woorea/openstack/connector/HttpClientConnector.java
@@ -0,0 +1,227 @@
+/*
+ * ============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;
+	}
+
+	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()));
+				
+				System.out.println("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
+			e.printStackTrace();
+			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);
+	}
+
+}