--- /dev/null
+/*******************************************************************************\r
+ * ============LICENSE_START==================================================\r
+ * * org.onap.dmaap\r
+ * * ===========================================================================\r
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.\r
+ * * ===========================================================================\r
+ * * Licensed under the Apache License, Version 2.0 (the "License");\r
+ * * you may not use this file except in compliance with the License.\r
+ * * You may obtain a copy of the License at\r
+ * * \r
+ * * http://www.apache.org/licenses/LICENSE-2.0\r
+ * * \r
+ * * Unless required by applicable law or agreed to in writing, software\r
+ * * distributed under the License is distributed on an "AS IS" BASIS,\r
+ * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ * * See the License for the specific language governing permissions and\r
+ * * limitations under the License.\r
+ * * ============LICENSE_END====================================================\r
+ * *\r
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.\r
+ * *\r
+ ******************************************************************************/\r
+\r
+\r
+package com.att.research.datarouter.provisioning;\r
+\r
+import java.io.IOException;\r
+import java.io.InputStream;\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.List;\r
+import java.util.Properties;\r
+\r
+import javax.servlet.ServletConfig;\r
+import javax.servlet.ServletException;\r
+import javax.servlet.http.HttpServletRequest;\r
+import javax.servlet.http.HttpServletResponse;\r
+\r
+import org.json.JSONArray;\r
+import org.json.JSONObject;\r
+import org.json.JSONTokener;\r
+\r
+import com.att.eelf.configuration.EELFLogger;\r
+import com.att.eelf.configuration.EELFManager;\r
+import com.att.research.datarouter.provisioning.beans.EventLogRecord;\r
+import com.att.research.datarouter.provisioning.beans.Feed;\r
+import com.att.research.datarouter.provisioning.beans.IngressRoute;\r
+import com.att.research.datarouter.provisioning.eelf.EelfMsgs;\r
+import com.att.research.datarouter.provisioning.utils.*;\r
+\r
+/**\r
+ * This servlet handles redirects for the <publishURL> on the provisioning server,\r
+ * which is generated by the provisioning server to handle a particular subscriptions to a feed.\r
+ * See the <b>File Publishing and Delivery API</b> document for details on how these methods\r
+ * should be invoked.\r
+ *\r
+ * @author Robert Eby\r
+ * @version $Id: PublishServlet.java,v 1.8 2014/03/12 19:45:41 eby Exp $\r
+ */\r
+@SuppressWarnings("serial")\r
+public class PublishServlet extends BaseServlet {\r
+ private int next_node;\r
+ private String provstring;\r
+ private List<IngressRoute> irt;\r
+ //Adding EELF Logger Rally:US664892 \r
+ private static EELFLogger eelflogger = EELFManager.getInstance().getLogger("com.att.research.datarouter.provisioning.PublishServlet");\r
+ \r
+\r
+ @Override\r
+ public void init(ServletConfig config) throws ServletException {\r
+ super.init(config);\r
+ next_node = 0;\r
+ provstring = "";\r
+ irt = new ArrayList<IngressRoute>();\r
+ \r
+ }\r
+ @Override\r
+ public void doDelete(HttpServletRequest req, HttpServletResponse resp) throws IOException {\r
+ setIpAndFqdnForEelf("doDelete");\r
+ eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader(BEHALF_HEADER),getIdFromPath(req)+"");\r
+ redirect(req, resp);\r
+ }\r
+ @Override\r
+ public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {\r
+ setIpAndFqdnForEelf("doGet");\r
+ eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader(BEHALF_HEADER),getIdFromPath(req)+"");\r
+ redirect(req, resp);\r
+ }\r
+ @Override\r
+ public void doPut(HttpServletRequest req, HttpServletResponse resp) throws IOException {\r
+ setIpAndFqdnForEelf("doPut");\r
+ eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader(BEHALF_HEADER),getIdFromPath(req)+"");\r
+ redirect(req, resp);\r
+ }\r
+ @Override\r
+ public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {\r
+ setIpAndFqdnForEelf("doPost");\r
+ eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF, req.getHeader(BEHALF_HEADER));\r
+ redirect(req, resp);\r
+ }\r
+ private void redirect(HttpServletRequest req, HttpServletResponse resp) throws IOException {\r
+ String[] nodes = getNodes();\r
+ if (nodes == null || nodes.length == 0) {\r
+ resp.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, "There are no nodes defined in the DR network.");\r
+ } else {\r
+ EventLogRecord elr = new EventLogRecord(req);\r
+ int feedid = checkPath(req);\r
+ if (feedid < 0) {\r
+ String message = (feedid == -1)\r
+ ? "Invalid request - Missing or bad feed number."\r
+ : "Invalid request - Missing file ID.";\r
+ elr.setMessage(message);\r
+ elr.setResult(HttpServletResponse.SC_NOT_FOUND);\r
+ eventlogger.info(elr);\r
+\r
+ resp.sendError(HttpServletResponse.SC_NOT_FOUND, message);\r
+ } else {\r
+ // Generate new URL\r
+ String nextnode = getRedirectNode(feedid, req);\r
+ nextnode = nextnode+":"+DB.HTTPS_PORT;\r
+ String newurl = "https://" + nextnode + "/publish" + req.getPathInfo();\r
+ String qs = req.getQueryString();\r
+ if (qs != null)\r
+ newurl += "?" + qs;\r
+\r
+ // Log redirect in event log\r
+ String message = "Redirected to: "+newurl;\r
+ elr.setMessage(message);\r
+ elr.setResult(HttpServletResponse.SC_MOVED_PERMANENTLY);\r
+ eventlogger.info(elr);\r
+\r
+ resp.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);\r
+ resp.setHeader("Location", newurl);\r
+ }\r
+ }\r
+ }\r
+ private String getRedirectNode(int feedid, HttpServletRequest req) {\r
+ // Check to see if the IRT needs to be updated\r
+ Poker p = Poker.getPoker();\r
+ String s = p.getProvisioningString();\r
+ synchronized (provstring) {\r
+ if (irt == null || (s.length() != provstring.length()) || !s.equals(provstring)) {\r
+ // Provisioning string has changed -- update the IRT\r
+ provstring = s;\r
+ JSONObject jo = new JSONObject(new JSONTokener(provstring));\r
+ JSONArray ja = jo.getJSONArray("ingress");\r
+ List<IngressRoute> newlist = new ArrayList<IngressRoute>();\r
+ for (int i = 0; i < ja.length(); i++) {\r
+ IngressRoute iroute = new IngressRoute(ja.getJSONObject(i));\r
+ newlist.add(iroute);\r
+ }\r
+ irt = newlist;\r
+ }\r
+ }\r
+\r
+ // Look in IRT for next node\r
+ for (IngressRoute route : irt) {\r
+ if (route.matches(feedid, req)) {\r
+ // pick a node at random from the list\r
+ Collection<String> nodes = route.getNodes();\r
+ String[] arr = nodes.toArray(new String[0]);\r
+ long id = System.currentTimeMillis() % arr.length;\r
+ String node = arr[(int) id];\r
+ intlogger.info("Redirecting to "+node+" because of route "+route);\r
+ return node;\r
+ }\r
+ }\r
+\r
+ // No IRT rule matches, do round robin of all active nodes\r
+ String[] nodes = getNodes();\r
+ if (next_node >= nodes.length) // The list of nodes may have grown/shrunk\r
+ next_node = 0;\r
+ return nodes[next_node++];\r
+ }\r
+ private int checkPath(HttpServletRequest req) {\r
+ String path = req.getPathInfo();\r
+ if (path == null || path.length() < 2)\r
+ return -1;\r
+ path = path.substring(1);\r
+ int ix = path.indexOf('/');\r
+ if (ix < 0 || ix == path.length()-1)\r
+ return -2;\r
+ try {\r
+ int feedid = Integer.parseInt(path.substring(0, ix));\r
+ if (!Feed.isFeedValid(feedid))\r
+ return -1;\r
+ return feedid;\r
+ } catch (NumberFormatException e) {\r
+ return -1;\r
+ }\r
+ }\r
+}\r
Code Review / dmaap / datarouter.git / blobdiff