datarouter-node/src/main/java/org/onap/dmaap/datarouter/node/NodeServlet.java

   1 /*******************************************************************************
   2  * ============LICENSE_START==================================================
   3  * * org.onap.dmaap
   4  * * ===========================================================================
   5  * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
   6  * * ===========================================================================
   7  * * Licensed under the Apache License, Version 2.0 (the "License");
   8  * * you may not use this file except in compliance with the License.
   9  * * You may obtain a copy of the License at
  10  * *
  11  *  *      http://www.apache.org/licenses/LICENSE-2.0
  12  * *
  13  *  * Unless required by applicable law or agreed to in writing, software
  14  * * distributed under the License is distributed on an "AS IS" BASIS,
  15  * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * * See the License for the specific language governing permissions and
  17  * * limitations under the License.
  18  * * ============LICENSE_END====================================================
  19  * *
  20  * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
  21  * *
  22  ******************************************************************************/
  23
  24
  25 package org.onap.dmaap.datarouter.node;
  26
  27 import com.att.eelf.configuration.EELFLogger;
  28 import com.att.eelf.configuration.EELFManager;
  29 import java.io.File;
  30 import java.io.FileOutputStream;
  31 import java.io.FileWriter;
  32 import java.io.IOException;
  33 import java.io.InputStream;
  34 import java.io.OutputStream;
  35 import java.io.Writer;
  36 import java.nio.file.Files;
  37 import java.nio.file.Path;
  38 import java.nio.file.Paths;
  39 import java.util.Enumeration;
  40 import java.util.regex.Pattern;
  41 import javax.servlet.ServletException;
  42 import javax.servlet.http.HttpServlet;
  43 import javax.servlet.http.HttpServletRequest;
  44 import javax.servlet.http.HttpServletResponse;
  45
  46 import org.apache.log4j.Logger;
  47 import org.onap.dmaap.datarouter.node.eelf.EelfMsgs;
  48
  49 import static org.onap.dmaap.datarouter.node.NodeUtils.sendResponseError;
  50
  51 /**
  52  * Servlet for handling all http and https requests to the data router node
  53  * <p>
  54  * Handled requests are:
  55  * <br>
  56  * GET http://<i>node</i>/internal/fetchProv - fetch the provisioning data
  57  * <br>
  58  * PUT/DELETE https://<i>node</i>/internal/publish/<i>fileid</i> - n2n transfer
  59  * <br>
  60  * PUT/DELETE https://<i>node</i>/publish/<i>feedid</i>/<i>fileid</i> - publsh request
  61  */
  62 public class NodeServlet extends HttpServlet {
  63     private static Logger logger = Logger.getLogger("org.onap.dmaap.datarouter.node.NodeServlet");
  64     private static NodeConfigManager config;
  65     private static Pattern MetaDataPattern;
  66     //Adding EELF Logger Rally:US664892
  67     private static EELFLogger eelflogger = EELFManager.getInstance()
  68         .getLogger("org.onap.dmaap.datarouter.node.NodeServlet");
  69
  70     static {
  71         final String ws = "\\s*";
  72         // assume that \\ and \" have been replaced by X
  73         final String string = "\"[^\"]*\"";
  74         //String string = "\"(?:[^\"\\\\]|\\\\.)*\"";
  75         final String number = "[+-]?(?:\\.\\d+|(?:0|[1-9]\\d*)(?:\\.\\d*)?)(?:[eE][+-]?\\d+)?";
  76         final String value = "(?:" + string + "|" + number + "|null|true|false)";
  77         final String item = string + ws + ":" + ws + value + ws;
  78         final String object = ws + "\\{" + ws + "(?:" + item + "(?:" + "," + ws + item + ")*)?\\}" + ws;
  79         MetaDataPattern = Pattern.compile(object, Pattern.DOTALL);
  80     }
  81
  82     /**
  83      * Get the NodeConfigurationManager
  84      */
  85     public void init() {
  86         config = NodeConfigManager.getInstance();
  87         logger.info("NODE0101 Node Servlet Configured");
  88     }
  89
  90     private boolean down(HttpServletResponse resp) throws IOException {
  91         if (config.isShutdown() || !config.isConfigured()) {
  92             sendResponseError(resp, HttpServletResponse.SC_SERVICE_UNAVAILABLE, logger);
  93             logger.info("NODE0102 Rejecting request: Service is being quiesced");
  94             return (true);
  95         }
  96         return (false);
  97     }
  98
  99     /**
 100      * Handle a GET for /internal/fetchProv
 101      */
 102     protected void doGet(HttpServletRequest req, HttpServletResponse resp){
 103         NodeUtils.setIpAndFqdnForEelf("doGet");
 104         eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader("X-ATT-DR-ON-BEHALF-OF"),
 105             getIdFromPath(req) + "");
 106         try{
 107             if (down(resp)) {
 108                 return;
 109             }
 110
 111         } catch (IOException ioe) {
 112             logger.error("IOException" + ioe.getMessage());
 113         }
 114         String path = req.getPathInfo();
 115         String qs = req.getQueryString();
 116         String ip = req.getRemoteAddr();
 117         if (qs != null) {
 118             path = path + "?" + qs;
 119         }
 120         if ("/internal/fetchProv".equals(path)) {
 121             config.gofetch(ip);
 122             resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
 123             return;
 124         } else if (path.startsWith("/internal/resetSubscription/")) {
 125             String subid = path.substring(28);
 126             if (subid.length() != 0 && subid.indexOf('/') == -1) {
 127                 NodeMain.resetQueue(subid, ip);
 128                 resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
 129                 return;
 130             }
 131         }
 132
 133         logger.info("NODE0103 Rejecting invalid GET of " + path + " from " + ip);
 134         sendResponseError(resp, HttpServletResponse.SC_NOT_FOUND, logger);
 135     }
 136
 137     /**
 138      * Handle all PUT requests
 139      */
 140     protected void doPut(HttpServletRequest req, HttpServletResponse resp) {
 141         NodeUtils.setIpAndFqdnForEelf("doPut");
 142         eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader("X-ATT-DR-ON-BEHALF-OF"),
 143             getIdFromPath(req) + "");
 144         try {
 145             common(req, resp, true);
 146         } catch(IOException ioe){
 147             logger.error("IOException" + ioe.getMessage());
 148         } catch(ServletException se){
 149             logger.error("ServletException" + se.getMessage());
 150         }
 151     }
 152
 153     /**
 154      * Handle all DELETE requests
 155      */
 156     protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 157         NodeUtils.setIpAndFqdnForEelf("doDelete");
 158         eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader("X-ATT-DR-ON-BEHALF-OF"),
 159             getIdFromPath(req) + "");
 160         try {
 161             common(req, resp, false);
 162         } catch(IOException ioe){
 163             logger.error("IOException" + ioe.getMessage());
 164         } catch(ServletException se){
 165             logger.error("ServletException" + se.getMessage());
 166         }
 167     }
 168
 169     private void common(HttpServletRequest req, HttpServletResponse resp, boolean isput)
 170         throws ServletException, IOException {
 171         if (down(resp)) {
 172             return;
 173         }
 174         if (!req.isSecure()) {
 175             logger.info(
 176                 "NODE0104 Rejecting insecure PUT or DELETE of " + req.getPathInfo() + " from " + req.getRemoteAddr());
 177             resp.sendError(HttpServletResponse.SC_FORBIDDEN, "https required on publish requests");
 178             return;
 179         }
 180         String fileid = req.getPathInfo();
 181         if (fileid == null) {
 182             logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 183                 .getRemoteAddr());
 184             resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 185                 "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.");
 186             return;
 187         }
 188         String feedid = null;
 189         String user = null;
 190         String credentials = req.getHeader("Authorization");
 191         if (credentials == null) {
 192             logger.info("NODE0106 Rejecting unauthenticated PUT or DELETE of " + req.getPathInfo() + " from " + req
 193                 .getRemoteAddr());
 194             resp.sendError(HttpServletResponse.SC_FORBIDDEN, "Authorization header required");
 195             return;
 196         }
 197         String ip = req.getRemoteAddr();
 198         String lip = req.getLocalAddr();
 199         String pubid = null;
 200         String xpubid = null;
 201         String rcvd = NodeUtils.logts(System.currentTimeMillis()) + ";from=" + ip + ";by=" + lip;
 202         Target[] targets = null;
 203         if (fileid.startsWith("/publish/")) {
 204             fileid = fileid.substring(9);
 205             int i = fileid.indexOf('/');
 206             if (i == -1 || i == fileid.length() - 1) {
 207                 logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 208                     .getRemoteAddr());
 209                 resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 210                     "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.  Possible missing fileid.");
 211                 return;
 212             }
 213             feedid = fileid.substring(0, i);
 214             fileid = fileid.substring(i + 1);
 215             pubid = config.getPublishId();
 216             xpubid = req.getHeader("X-ATT-DR-PUBLISH-ID");
 217             targets = config.getTargets(feedid);
 218         } else if (fileid.startsWith("/internal/publish/")) {
 219             if (!config.isAnotherNode(credentials, ip)) {
 220                 logger.info("NODE0107 Rejecting unauthorized node-to-node transfer attempt from " + ip);
 221                 resp.sendError(HttpServletResponse.SC_FORBIDDEN);
 222                 return;
 223             }
 224             fileid = fileid.substring(18);
 225             pubid = req.getHeader("X-ATT-DR-PUBLISH-ID");
 226             targets = config.parseRouting(req.getHeader("X-ATT-DR-ROUTING"));
 227         } else {
 228             logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 229                 .getRemoteAddr());
 230             resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 231                 "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.");
 232             return;
 233         }
 234         if (fileid.indexOf('/') != -1) {
 235             logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 236                 .getRemoteAddr());
 237             resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 238                 "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.");
 239             return;
 240         }
 241         String qs = req.getQueryString();
 242         if (qs != null) {
 243             fileid = fileid + "?" + qs;
 244         }
 245         String hp = config.getMyName();
 246         int xp = config.getExtHttpsPort();
 247         if (xp != 443) {
 248             hp = hp + ":" + xp;
 249         }
 250         String logurl = "https://" + hp + "/internal/publish/" + fileid;
 251         if (feedid != null) {
 252             logurl = "https://" + hp + "/publish/" + feedid + "/" + fileid;
 253             String reason = config.isPublishPermitted(feedid, credentials, ip);
 254             if (reason != null) {
 255                 logger.info(
 256                     "NODE0111 Rejecting unauthorized publish attempt to feed " + feedid + " fileid " + fileid + " from "
 257                         + ip + " reason " + reason);
 258                 resp.sendError(HttpServletResponse.SC_FORBIDDEN, reason);
 259                 return;
 260             }
 261             user = config.getAuthUser(feedid, credentials);
 262             String newnode = config.getIngressNode(feedid, user, ip);
 263             if (newnode != null) {
 264                 String port = "";
 265                 int iport = config.getExtHttpsPort();
 266                 if (iport != 443) {
 267                     port = ":" + iport;
 268                 }
 269                 String redirto = "https://" + newnode + port + "/publish/" + feedid + "/" + fileid;
 270                 logger.info(
 271                     "NODE0108 Redirecting publish attempt for feed " + feedid + " user " + user + " ip " + ip + " to "
 272                         + redirto);
 273                 resp.sendRedirect(redirto);
 274                 return;
 275             }
 276             resp.setHeader("X-ATT-DR-PUBLISH-ID", pubid);
 277         }
 278         String fbase = config.getSpoolDir() + "/" + pubid;
 279         File data = new File(fbase);
 280         File meta = new File(fbase + ".M");
 281         OutputStream dos = null;
 282         InputStream is = null;
 283         try (Writer mw = new FileWriter(meta)){
 284             StringBuffer mx = new StringBuffer();
 285             mx.append(req.getMethod()).append('\t').append(fileid).append('\n');
 286             Enumeration hnames = req.getHeaderNames();
 287             String ctype = null;
 288             while (hnames.hasMoreElements()) {
 289                 String hn = (String) hnames.nextElement();
 290                 String hnlc = hn.toLowerCase();
 291                 if ((isput && ("content-type".equals(hnlc) ||
 292                     "content-language".equals(hnlc) ||
 293                     "content-md5".equals(hnlc) ||
 294                     "content-range".equals(hnlc))) ||
 295                     "x-att-dr-meta".equals(hnlc) ||
 296                     (feedid == null && "x-att-dr-received".equals(hnlc)) ||
 297                     (hnlc.startsWith("x-") && !hnlc.startsWith("x-att-dr-"))) {
 298                     Enumeration hvals = req.getHeaders(hn);
 299                     while (hvals.hasMoreElements()) {
 300                         String hv = (String) hvals.nextElement();
 301                         if ("content-type".equals(hnlc)) {
 302                             ctype = hv;
 303                         }
 304                         if ("x-att-dr-meta".equals(hnlc)) {
 305                             if (hv.length() > 4096) {
 306                                 logger.info(
 307                                     "NODE0109 Rejecting publish attempt with metadata too long for feed " + feedid
 308                                         + " user " + user + " ip " + ip);
 309                                 resp.sendError(HttpServletResponse.SC_BAD_REQUEST, "Metadata too long");
 310                                 return;
 311                             }
 312                             if (!MetaDataPattern.matcher(hv.replaceAll("\\\\.", "X")).matches()) {
 313                                 logger.info(
 314                                     "NODE0109 Rejecting publish attempt with malformed metadata for feed " + feedid
 315                                         + " user " + user + " ip " + ip);
 316                                 resp.sendError(HttpServletResponse.SC_BAD_REQUEST, "Malformed metadata");
 317                                 return;
 318                             }
 319                         }
 320                         mx.append(hn).append('\t').append(hv).append('\n');
 321                     }
 322                 }
 323             }
 324             mx.append("X-ATT-DR-RECEIVED\t").append(rcvd).append('\n');
 325             String metadata = mx.toString();
 326             byte[] buf = new byte[1024 * 1024];
 327             int i;
 328             try {
 329                 is = req.getInputStream();
 330                 dos = new FileOutputStream(data);
 331                 while ((i = is.read(buf)) > 0) {
 332                     dos.write(buf, 0, i);
 333                 }
 334                 is.close();
 335                 is = null;
 336                 dos.close();
 337                 dos = null;
 338             } catch (IOException ioe) {
 339                 long exlen = -1;
 340                 try {
 341                     exlen = Long.parseLong(req.getHeader("Content-Length"));
 342                 } catch (Exception e) {
 343                 }
 344                 StatusLog.logPubFail(pubid, feedid, logurl, req.getMethod(), ctype, exlen, data.length(), ip, user,
 345                     ioe.getMessage());
 346                 throw ioe;
 347             }
 348             Path dpath = Paths.get(fbase);
 349             for (Target t : targets) {
 350                 DestInfo di = t.getDestInfo();
 351                 if (di == null) {
 352                     // TODO: unknown destination
 353                     continue;
 354                 }
 355                 String dbase = di.getSpool() + "/" + pubid;
 356                 Files.createLink(Paths.get(dbase), dpath);
 357                 mw.write(metadata);
 358                 if (di.getSubId() == null) {
 359                     mw.write("X-ATT-DR-ROUTING\t" + t.getRouting() + "\n");
 360                 }
 361                 meta.renameTo(new File(dbase + ".M"));
 362             }
 363             resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
 364             resp.getOutputStream().close();
 365             StatusLog.logPub(pubid, feedid, logurl, req.getMethod(), ctype, data.length(), ip, user,
 366                 HttpServletResponse.SC_NO_CONTENT);
 367         } catch (IOException ioe) {
 368             logger.info(
 369                 "NODE0110 IO Exception receiving publish attempt for feed " + feedid + " user " + user + " ip " + ip
 370                     + " " + ioe.toString(), ioe);
 371             throw ioe;
 372         } finally {
 373             if (is != null) {
 374                 try {
 375                     is.close();
 376                 } catch (Exception e) {
 377                 }
 378             }
 379             if (dos != null) {
 380                 try {
 381                     dos.close();
 382                 } catch (Exception e) {
 383                 }
 384             }
 385             try {
 386                 data.delete();
 387             } catch (Exception e) {
 388             }
 389             try {
 390                 meta.delete();
 391             } catch (Exception e) {
 392             }
 393         }
 394     }
 395
 396     private int getIdFromPath(HttpServletRequest req) {
 397         String path = req.getPathInfo();
 398         if (path == null || path.length() < 2) {
 399             return -1;
 400         }
 401         try {
 402             return Integer.parseInt(path.substring(1));
 403         } catch (NumberFormatException e) {
 404             return -1;
 405         }
 406     }
 407 }