--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * openECOMP : SDN-C
+ * ================================================================================
+ * Copyright (C) 2019 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=========================================================
+ */
+
+package org.onap.ccsdk.sli.plugins.grtoolkit.connection;
+
+import org.apache.commons.lang.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Handles the process for getting HTTP connections to resources. Has the
+ * ability to send JSON payloads. Only supports basic authorization when
+ * sending credentials.
+ *
+ * @author Anthony Haddox
+ * @see ConnectionResponse
+ */
+public interface ConnectionManager {
+ Logger log = LoggerFactory.getLogger(ConnectionManager.class);
+ int CONNECTION_TIMEOUT = 5000; // 5 second timeout
+ enum HttpMethod {
+ GET("GET"),
+ POST("POST");
+
+ private final String method;
+ HttpMethod(String method) {
+ this.method = method;
+ }
+ String getMethod() {
+ return method;
+ }
+ }
+
+ /**
+ * Writes a JSON payload to an {@code HTTPURLConnection OutputStream}.
+ *
+ * @param input the JSON payload to send
+ * @param connection the {@code HTTPURLConnection} to write to
+ * @throws IOException if there is a problem writing to the output stream
+ */
+ static void sendPayload(String input, HttpURLConnection connection) throws IOException {
+ byte[] out = input.getBytes(StandardCharsets.UTF_8);
+ int length = out.length;
+
+ connection.setFixedLengthStreamingMode(length);
+ connection.setRequestProperty("Content-Type", "application/json");
+ connection.setDoOutput(true);
+ connection.connect();
+ try(OutputStream os = connection.getOutputStream()) {
+ os.write(out);
+ }
+ }
+
+ /**
+ * Gets an {@code HTTPURLConnection} to a {@code host}.
+ *
+ * @param host the host to connect to
+ * @return an {@code HTTPURLConnection}
+ * @throws IOException if a connection cannot be opened
+ */
+ static HttpURLConnection getConnection(String host) throws IOException {
+ log.info("getConnection(): Getting connection to: {}", host);
+ URL url = new URL(host);
+ HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+ connection.setRequestProperty("Connection", "keep-alive");
+ connection.setRequestProperty("Proxy-Connection", "keep-alive");
+ connection.setConnectTimeout(CONNECTION_TIMEOUT);
+ connection.setReadTimeout(CONNECTION_TIMEOUT);
+ return connection;
+ }
+
+ /**
+ * Gets an {@code HTTPURLConnection} to a {@code host} and sets the
+ * Authorization header with the supplied credentials. Only supports basic
+ * authentication.
+ *
+ * @param host the host to connect to
+ * @param credentials the authorization credentials
+ * @return an {@code HTTPURLConnection} with Authorization header set
+ * @throws IOException if a connection cannot be opened
+ */
+ static HttpURLConnection getConnection(String host, String credentials) throws IOException {
+ String auth = "Basic " + javax.xml.bind.DatatypeConverter.printBase64Binary(credentials.getBytes());
+ HttpURLConnection connection = getConnection(host);
+ connection.addRequestProperty("Authorization", auth);
+ credentials = null;
+ auth = null;
+ return connection;
+ }
+
+ /**
+ * Opens a connection to a path, sends a payload (if supplied with one),
+ * and returns the response.
+ * @param path the host to connect to
+ * @param method the {@code HttpMethod} to use
+ * @param input the payload to send
+ * @param credentials the credentials to use
+ * @return a {@code ConnectionResponse} containing the response body and
+ * status code of the operation
+ * @throws IOException if a connection cannot be opened or if the payload
+ * cannot be sent
+ * @see HttpMethod
+ */
+ static ConnectionResponse getConnectionResponse(String path, HttpMethod method, String input, String credentials) throws IOException {
+ HttpURLConnection connection = (StringUtils.isEmpty(credentials)) ? getConnection(path) : getConnection(path, credentials);
+ credentials = null;
+ connection.setRequestMethod(method.getMethod());
+ connection.setDoInput(true);
+
+ if(!StringUtils.isEmpty(input)) {
+ sendPayload(input, connection);
+ }
+
+ StringBuilder content = new StringBuilder();
+ try(BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
+ String inputLine;
+ while((inputLine = bufferedReader.readLine()) != null) {
+ content.append(inputLine);
+ }
+ } finally {
+ connection.disconnect();
+ }
+
+ ConnectionResponse connectionResponse = new ConnectionResponse();
+ connectionResponse.content = content.toString();
+ connectionResponse.statusCode = connection.getResponseCode();
+ log.info("getConnectionResponse(): {} response code from {}", connectionResponse.statusCode, path);
+ log.debug("getConnectionResponse(): Response:\n{}", connectionResponse.content);
+ return connectionResponse;
+ }
+}
Code Review / ccsdk / sli / plugins.git / blobdiff