/*******************************************************************************
* ============LICENSE_START==================================================
* * org.onap.dmaap
* * ===========================================================================
* * 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 is a trademark and service mark of AT&T Intellectual Property.
* *
******************************************************************************/
package org.onap.dmaap.datarouter.provisioning;
import java.io.IOException;
import java.io.InvalidObjectException;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONObject;
import org.onap.dmaap.datarouter.authz.AuthorizationResponse;
import org.onap.dmaap.datarouter.provisioning.beans.EventLogRecord;
import org.onap.dmaap.datarouter.provisioning.beans.Feed;
import org.onap.dmaap.datarouter.provisioning.eelf.EelfMsgs;
import org.onap.dmaap.datarouter.provisioning.utils.JSONUtilities;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
/**
* This servlet handles provisioning for the <drFeedsURL> which is the URL on the provisioning server used to
* create new feeds. It supports POST to create new feeds, and GET to support the Feeds Collection Query function.
*
* @author Robert Eby
* @version $Id$
*/
@SuppressWarnings("serial")
public class DRFeedsServlet extends ProxyServlet {
//Adding EELF Logger Rally:US664892
private static EELFLogger eelflogger = EELFManager.getInstance()
.getLogger("org.onap.dmaap.datarouter.provisioning.DRFeedsServlet");
/**
* DELETE on the <drFeedsURL> -- not supported.
*/
@Override
public void doDelete(HttpServletRequest req, HttpServletResponse resp) throws IOException {
setIpAndFqdnForEelf("doDelete");
eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader(BEHALF_HEADER), getIdFromPath(req) + "");
String message = "DELETE not allowed for the drFeedsURL.";
EventLogRecord elr = new EventLogRecord(req);
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_METHOD_NOT_ALLOWED);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, message);
}
/**
* GET on the <drFeedsURL> -- query the list of feeds already existing in the DB. See the Feeds Collection
* Queries section in the Provisioning API document for details on how this method should be invoked.
*/
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
setIpAndFqdnForEelf("doGet");
eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader(BEHALF_HEADER), getIdFromPath(req) + "");
EventLogRecord elr = new EventLogRecord(req);
String message = isAuthorizedForProvisioning(req);
if (message != null) {
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_FORBIDDEN);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_FORBIDDEN, message);
return;
}
if (isProxyServer()) {
super.doGet(req, resp);
return;
}
String bhdr = req.getHeader(BEHALF_HEADER);
if (bhdr == null) {
message = "Missing " + BEHALF_HEADER + " header.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_BAD_REQUEST);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_BAD_REQUEST, message);
return;
}
String path = req
.getRequestURI(); // Note: I think this should be getPathInfo(), but that doesn't work (Jetty bug?)
if (path != null && !path.equals("/")) {
message = "Bad URL.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_NOT_FOUND);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_NOT_FOUND, message);
return;
}
// Check with the Authorizer
AuthorizationResponse aresp = authz.decide(req);
if (!aresp.isAuthorized()) {
message = "Policy Engine disallows access.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_FORBIDDEN);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_FORBIDDEN, message);
return;
}
String name = req.getParameter("name");
String vers = req.getParameter("version");
String publ = req.getParameter("publisher");
String subs = req.getParameter("subscriber");
if (name != null && vers != null) {
// Display a specific feed
Feed feed = Feed.getFeedByNameVersion(name, vers);
if (feed == null || feed.isDeleted()) {
message = "This feed does not exist in the database.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_BAD_REQUEST);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_BAD_REQUEST, message);
} else {
// send response
elr.setResult(HttpServletResponse.SC_OK);
eventlogger.info(elr);
resp.setStatus(HttpServletResponse.SC_OK);
resp.setContentType(FEEDFULL_CONTENT_TYPE);
resp.getOutputStream().print(feed.asJSONObject(true).toString());
}
} else {
// Display a list of URLs
List list = null;
if (name != null) {
list = Feed.getFilteredFeedUrlList("name", name);
} else if (publ != null) {
list = Feed.getFilteredFeedUrlList("publ", publ);
} else if (subs != null) {
list = Feed.getFilteredFeedUrlList("subs", subs);
} else {
list = Feed.getFilteredFeedUrlList("all", null);
}
String t = JSONUtilities.createJSONArray(list);
// send response
elr.setResult(HttpServletResponse.SC_OK);
eventlogger.info(elr);
resp.setStatus(HttpServletResponse.SC_OK);
resp.setContentType(FEEDLIST_CONTENT_TYPE);
resp.getOutputStream().print(t);
}
}
/**
* PUT on the <drFeedsURL> -- not supported.
*/
@Override
public void doPut(HttpServletRequest req, HttpServletResponse resp) throws IOException {
setIpAndFqdnForEelf("doPut");
eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader(BEHALF_HEADER), getIdFromPath(req) + "");
String message = "PUT not allowed for the drFeedsURL.";
EventLogRecord elr = new EventLogRecord(req);
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_METHOD_NOT_ALLOWED);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, message);
}
/**
* POST on the <drFeedsURL> -- create a new feed. See the Creating a Feed section in the
* Provisioning API document for details on how this method should be invoked.
*/
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
setIpAndFqdnForEelf("doPost");
eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF, req.getHeader(BEHALF_HEADER));
EventLogRecord elr = new EventLogRecord(req);
String message = isAuthorizedForProvisioning(req);
if (message != null) {
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_FORBIDDEN);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_FORBIDDEN, message);
return;
}
if (isProxyServer()) {
super.doPost(req, resp);
return;
}
String bhdr = req.getHeader(BEHALF_HEADER);
if (bhdr == null) {
message = "Missing " + BEHALF_HEADER + " header.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_BAD_REQUEST);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_BAD_REQUEST, message);
return;
}
String path = req
.getRequestURI(); // Note: I think this should be getPathInfo(), but that doesn't work (Jetty bug?)
if (path != null && !path.equals("/")) {
message = "Bad URL.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_NOT_FOUND);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_NOT_FOUND, message);
return;
}
// check content type is FEED_CONTENT_TYPE, version 1.0
ContentHeader ch = getContentHeader(req);
String ver = ch.getAttribute("version");
if (!ch.getType().equals(FEED_BASECONTENT_TYPE) || !(ver.equals("1.0") || ver.equals("2.0"))) {
message = "Incorrect content-type";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE, message);
return;
}
// Check with the Authorizer
AuthorizationResponse aresp = authz.decide(req);
if (!aresp.isAuthorized()) {
message = "Policy Engine disallows access.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_FORBIDDEN);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_FORBIDDEN, message);
return;
}
JSONObject jo = getJSONfromInput(req);
if (jo == null) {
message = "Badly formed JSON";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_BAD_REQUEST);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_BAD_REQUEST, message);
return;
}
if (intlogger.isDebugEnabled()) {
intlogger.debug(jo.toString());
}
if (++activeFeeds > maxFeeds) {
activeFeeds--;
message = "Cannot create feed; the maximum number of feeds has been configured.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_CONFLICT);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_CONFLICT, message);
return;
}
Feed feed = null;
try {
feed = new Feed(jo);
} catch (InvalidObjectException e) {
message = e.getMessage();
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_BAD_REQUEST);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_BAD_REQUEST, message);
return;
}
feed.setPublisher(bhdr); // set from X-ATT-DR-ON-BEHALF-OF header
// Check if this feed already exists
Feed feed2 = Feed.getFeedByNameVersion(feed.getName(), feed.getVersion());
if (feed2 != null) {
message = "This feed already exists in the database.";
elr.setMessage(message);
elr.setResult(HttpServletResponse.SC_BAD_REQUEST);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_BAD_REQUEST, message);
return;
}
// Create FEED table entries
if (doInsert(feed)) {
// send response
elr.setResult(HttpServletResponse.SC_CREATED);
eventlogger.info(elr);
resp.setStatus(HttpServletResponse.SC_CREATED);
resp.setContentType(FEEDFULL_CONTENT_TYPE);
resp.setHeader("Location", feed.getLinks().getSelf());
resp.getOutputStream().print(feed.asLimitedJSONObject().toString());
provisioningDataChanged();
} else {
// Something went wrong with the INSERT
elr.setResult(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
eventlogger.info(elr);
resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, DB_PROBLEM_MSG);
}
}
}