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.FileInputStream;
  31 import java.io.FileOutputStream;
  32 import java.io.FileWriter;
  33 import java.io.IOException;
  34 import java.io.InputStream;
  35 import java.io.OutputStream;
  36 import java.io.Writer;
  37 import java.net.Socket;
  38 import java.nio.file.Files;
  39 import java.nio.file.Path;
  40 import java.nio.file.Paths;
  41 import java.util.Enumeration;
  42 import java.util.regex.Pattern;
  43 import javax.servlet.ServletException;
  44 import javax.servlet.http.HttpServlet;
  45 import javax.servlet.http.HttpServletRequest;
  46 import javax.servlet.http.HttpServletResponse;
  47 import org.apache.log4j.Logger;
  48 import org.onap.dmaap.datarouter.node.eelf.EelfMsgs;
  49
  50 /**
  51  * Servlet for handling all http and https requests to the data router node
  52  * <p>
  53  * Handled requests are:
  54  * <br>
  55  * GET http://<i>node</i>/internal/fetchProv - fetch the provisioning data
  56  * <br>
  57  * PUT/DELETE https://<i>node</i>/internal/publish/<i>fileid</i> - n2n transfer
  58  * <br>
  59  * PUT/DELETE https://<i>node</i>/publish/<i>feedid</i>/<i>fileid</i> - publsh request
  60  */
  61 public class NodeServlet extends HttpServlet {
  62
  63     private static Logger logger = Logger.getLogger("org.onap.dmaap.datarouter.node.NodeServlet");
  64     private static NodeConfigManager config;
  65     private static Pattern MetaDataPattern;
  66     private static SubnetMatcher internalsubnet = new SubnetMatcher("135.207.136.128/25");
  67     //Adding EELF Logger Rally:US664892
  68     private static EELFLogger eelflogger = EELFManager.getInstance()
  69         .getLogger("org.onap.dmaap.datarouter.node.NodeServlet");
  70
  71     static {
  72         final String ws = "\\s*";
  73         // assume that \\ and \" have been replaced by X
  74         final String string = "\"[^\"]*\"";
  75         //String string = "\"(?:[^\"\\\\]|\\\\.)*\"";
  76         final String number = "[+-]?(?:\\.\\d+|(?:0|[1-9]\\d*)(?:\\.\\d*)?)(?:[eE][+-]?\\d+)?";
  77         final String value = "(?:" + string + "|" + number + "|null|true|false)";
  78         final String item = string + ws + ":" + ws + value + ws;
  79         final String object = ws + "\\{" + ws + "(?:" + item + "(?:" + "," + ws + item + ")*)?\\}" + ws;
  80         MetaDataPattern = Pattern.compile(object, Pattern.DOTALL);
  81     }
  82
  83     /**
  84      * Get the NodeConfigurationManager
  85      */
  86     public void init() {
  87         config = NodeConfigManager.getInstance();
  88         logger.info("NODE0101 Node Servlet Configured");
  89     }
  90
  91     private boolean down(HttpServletResponse resp) throws IOException {
  92         if (config.isShutdown() || !config.isConfigured()) {
  93             resp.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
  94             logger.info("NODE0102 Rejecting request: Service is being quiesced");
  95             return (true);
  96         }
  97         return (false);
  98     }
  99
 100     /**
 101      * Handle a GET for /internal/fetchProv
 102      */
 103     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 104         NodeUtils.setIpAndFqdnForEelf("doGet");
 105         eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader("X-ATT-DR-ON-BEHALF-OF"),
 106             getIdFromPath(req) + "");
 107         if (down(resp)) {
 108             return;
 109         }
 110         String path = req.getPathInfo();
 111         String qs = req.getQueryString();
 112         String ip = req.getRemoteAddr();
 113         if (qs != null) {
 114             path = path + "?" + qs;
 115         }
 116         if ("/internal/fetchProv".equals(path)) {
 117             config.gofetch(ip);
 118             resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
 119             return;
 120         } else if (path.startsWith("/internal/resetSubscription/")) {
 121             String subid = path.substring(28);
 122             if (subid.length() != 0 && subid.indexOf('/') == -1) {
 123                 NodeMain.resetQueue(subid, ip);
 124                 resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
 125                 return;
 126             }
 127         }
 128         if (internalsubnet.matches(NodeUtils.getInetAddress(ip))) {
 129             if (path.startsWith("/internal/logs/")) {
 130                 String f = path.substring(15);
 131                 File fn = new File(config.getLogDir() + "/" + f);
 132                 if (f.indexOf('/') != -1 || !fn.isFile()) {
 133                     logger.info("NODE0103 Rejecting invalid GET of " + path + " from " + ip);
 134                     resp.sendError(HttpServletResponse.SC_NOT_FOUND);
 135                     return;
 136                 }
 137                 byte[] buf = new byte[65536];
 138                 resp.setContentType("text/plain");
 139                 resp.setContentLength((int) fn.length());
 140                 resp.setStatus(200);
 141                 try (InputStream is = new FileInputStream(fn)) {
 142                     OutputStream os = resp.getOutputStream();
 143                     int i;
 144                     while ((i = is.read(buf)) > 0) {
 145                         os.write(buf, 0, i);
 146                     }
 147                 }
 148                 return;
 149             }
 150             if (path.startsWith("/internal/rtt/")) {
 151                 String xip = path.substring(14);
 152                 long st = System.currentTimeMillis();
 153                 String status = " unknown";
 154                 try {
 155                     Socket s = new Socket(xip, 443);
 156                     s.close();
 157                     status = " connected";
 158                 } catch (Exception e) {
 159                     status = " error " + e.toString();
 160                 }
 161                 long dur = System.currentTimeMillis() - st;
 162                 resp.setContentType("text/plain");
 163                 resp.setStatus(200);
 164                 byte[] buf = (dur + status + "\n").getBytes();
 165                 resp.setContentLength(buf.length);
 166                 resp.getOutputStream().write(buf);
 167                 return;
 168             }
 169         }
 170         logger.info("NODE0103 Rejecting invalid GET of " + path + " from " + ip);
 171         resp.sendError(HttpServletResponse.SC_NOT_FOUND);
 172     }
 173
 174     /**
 175      * Handle all PUT requests
 176      */
 177     protected void doPut(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 178         NodeUtils.setIpAndFqdnForEelf("doPut");
 179         eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader("X-ATT-DR-ON-BEHALF-OF"),
 180             getIdFromPath(req) + "");
 181         common(req, resp, true);
 182     }
 183
 184     /**
 185      * Handle all DELETE requests
 186      */
 187     protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 188         NodeUtils.setIpAndFqdnForEelf("doDelete");
 189         eelflogger.info(EelfMsgs.MESSAGE_WITH_BEHALF_AND_FEEDID, req.getHeader("X-ATT-DR-ON-BEHALF-OF"),
 190             getIdFromPath(req) + "");
 191         common(req, resp, false);
 192     }
 193
 194     private void common(HttpServletRequest req, HttpServletResponse resp, boolean isput)
 195         throws ServletException, IOException {
 196         if (down(resp)) {
 197             return;
 198         }
 199         if (!req.isSecure()) {
 200             logger.info(
 201                 "NODE0104 Rejecting insecure PUT or DELETE of " + req.getPathInfo() + " from " + req.getRemoteAddr());
 202             resp.sendError(HttpServletResponse.SC_FORBIDDEN, "https required on publish requests");
 203             return;
 204         }
 205         String fileid = req.getPathInfo();
 206         if (fileid == null) {
 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>.");
 211             return;
 212         }
 213         String feedid = null;
 214         String user = null;
 215         String credentials = req.getHeader("Authorization");
 216         if (credentials == null) {
 217             logger.info("NODE0106 Rejecting unauthenticated PUT or DELETE of " + req.getPathInfo() + " from " + req
 218                 .getRemoteAddr());
 219             resp.sendError(HttpServletResponse.SC_FORBIDDEN, "Authorization header required");
 220             return;
 221         }
 222         String ip = req.getRemoteAddr();
 223         String lip = req.getLocalAddr();
 224         String pubid = null;
 225         String xpubid = null;
 226         String rcvd = NodeUtils.logts(System.currentTimeMillis()) + ";from=" + ip + ";by=" + lip;
 227         Target[] targets = null;
 228         if (fileid.startsWith("/publish/")) {
 229             fileid = fileid.substring(9);
 230             int i = fileid.indexOf('/');
 231             if (i == -1 || i == fileid.length() - 1) {
 232                 logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 233                     .getRemoteAddr());
 234                 resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 235                     "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.  Possible missing fileid.");
 236                 return;
 237             }
 238             feedid = fileid.substring(0, i);
 239             fileid = fileid.substring(i + 1);
 240             pubid = config.getPublishId();
 241             xpubid = req.getHeader("X-ATT-DR-PUBLISH-ID");
 242             targets = config.getTargets(feedid);
 243         } else if (fileid.startsWith("/internal/publish/")) {
 244             if (!config.isAnotherNode(credentials, ip)) {
 245                 logger.info("NODE0107 Rejecting unauthorized node-to-node transfer attempt from " + ip);
 246                 resp.sendError(HttpServletResponse.SC_FORBIDDEN);
 247                 return;
 248             }
 249             fileid = fileid.substring(18);
 250             pubid = req.getHeader("X-ATT-DR-PUBLISH-ID");
 251             targets = config.parseRouting(req.getHeader("X-ATT-DR-ROUTING"));
 252         } else {
 253             logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 254                 .getRemoteAddr());
 255             resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 256                 "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.");
 257             return;
 258         }
 259         if (fileid.indexOf('/') != -1) {
 260             logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 261                 .getRemoteAddr());
 262             resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 263                 "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.");
 264             return;
 265         }
 266         String qs = req.getQueryString();
 267         if (qs != null) {
 268             fileid = fileid + "?" + qs;
 269         }
 270         String hp = config.getMyName();
 271         int xp = config.getExtHttpsPort();
 272         if (xp != 443) {
 273             hp = hp + ":" + xp;
 274         }
 275         String logurl = "https://" + hp + "/internal/publish/" + fileid;
 276         if (feedid != null) {
 277             logurl = "https://" + hp + "/publish/" + feedid + "/" + fileid;
 278             String reason = config.isPublishPermitted(feedid, credentials, ip);
 279             if (reason != null) {
 280                 logger.info(
 281                     "NODE0111 Rejecting unauthorized publish attempt to feed " + feedid + " fileid " + fileid + " from "
 282                         + ip + " reason " + reason);
 283                 resp.sendError(HttpServletResponse.SC_FORBIDDEN, reason);
 284                 return;
 285             }
 286             user = config.getAuthUser(feedid, credentials);
 287             String newnode = config.getIngressNode(feedid, user, ip);
 288             if (newnode != null) {
 289                 String port = "";
 290                 int iport = config.getExtHttpsPort();
 291                 if (iport != 443) {
 292                     port = ":" + iport;
 293                 }
 294                 String redirto = "https://" + newnode + port + "/publish/" + feedid + "/" + fileid;
 295                 logger.info(
 296                     "NODE0108 Redirecting publish attempt for feed " + feedid + " user " + user + " ip " + ip + " to "
 297                         + redirto);
 298                 resp.sendRedirect(redirto);
 299                 return;
 300             }
 301             resp.setHeader("X-ATT-DR-PUBLISH-ID", pubid);
 302         }
 303         String fbase = config.getSpoolDir() + "/" + pubid;
 304         File data = new File(fbase);
 305         File meta = new File(fbase + ".M");
 306         OutputStream dos = null;
 307         Writer mw = null;
 308         InputStream is = null;
 309         try {
 310             StringBuffer mx = new StringBuffer();
 311             mx.append(req.getMethod()).append('\t').append(fileid).append('\n');
 312             Enumeration hnames = req.getHeaderNames();
 313             String ctype = null;
 314             while (hnames.hasMoreElements()) {
 315                 String hn = (String) hnames.nextElement();
 316                 String hnlc = hn.toLowerCase();
 317                 if ((isput && ("content-type".equals(hnlc) ||
 318                     "content-language".equals(hnlc) ||
 319                     "content-md5".equals(hnlc) ||
 320                     "content-range".equals(hnlc))) ||
 321                     "x-att-dr-meta".equals(hnlc) ||
 322                     (feedid == null && "x-att-dr-received".equals(hnlc)) ||
 323                     (hnlc.startsWith("x-") && !hnlc.startsWith("x-att-dr-"))) {
 324                     Enumeration hvals = req.getHeaders(hn);
 325                     while (hvals.hasMoreElements()) {
 326                         String hv = (String) hvals.nextElement();
 327                         if ("content-type".equals(hnlc)) {
 328                             ctype = hv;
 329                         }
 330                         if ("x-att-dr-meta".equals(hnlc)) {
 331                             if (hv.length() > 4096) {
 332                                 logger.info(
 333                                     "NODE0109 Rejecting publish attempt with metadata too long for feed " + feedid
 334                                         + " user " + user + " ip " + ip);
 335                                 resp.sendError(HttpServletResponse.SC_BAD_REQUEST, "Metadata too long");
 336                                 return;
 337                             }
 338                             if (!MetaDataPattern.matcher(hv.replaceAll("\\\\.", "X")).matches()) {
 339                                 logger.info(
 340                                     "NODE0109 Rejecting publish attempt with malformed metadata for feed " + feedid
 341                                         + " user " + user + " ip " + ip);
 342                                 resp.sendError(HttpServletResponse.SC_BAD_REQUEST, "Malformed metadata");
 343                                 return;
 344                             }
 345                         }
 346                         mx.append(hn).append('\t').append(hv).append('\n');
 347                     }
 348                 }
 349             }
 350             mx.append("X-ATT-DR-RECEIVED\t").append(rcvd).append('\n');
 351             String metadata = mx.toString();
 352             byte[] buf = new byte[1024 * 1024];
 353             int i;
 354             try {
 355                 is = req.getInputStream();
 356                 dos = new FileOutputStream(data);
 357                 while ((i = is.read(buf)) > 0) {
 358                     dos.write(buf, 0, i);
 359                 }
 360                 is.close();
 361                 is = null;
 362                 dos.close();
 363                 dos = null;
 364             } catch (IOException ioe) {
 365                 long exlen = -1;
 366                 try {
 367                     exlen = Long.parseLong(req.getHeader("Content-Length"));
 368                 } catch (Exception e) {
 369                 }
 370                 StatusLog.logPubFail(pubid, feedid, logurl, req.getMethod(), ctype, exlen, data.length(), ip, user,
 371                     ioe.getMessage());
 372                 throw ioe;
 373             }
 374             Path dpath = Paths.get(fbase);
 375             for (Target t : targets) {
 376                 DestInfo di = t.getDestInfo();
 377                 if (di == null) {
 378                     // TODO: unknown destination
 379                     continue;
 380                 }
 381                 String dbase = di.getSpool() + "/" + pubid;
 382                 Files.createLink(Paths.get(dbase), dpath);
 383                 mw = new FileWriter(meta);
 384                 mw.write(metadata);
 385                 if (di.getSubId() == null) {
 386                     mw.write("X-ATT-DR-ROUTING\t" + t.getRouting() + "\n");
 387                 }
 388                 mw.close();
 389                 meta.renameTo(new File(dbase + ".M"));
 390             }
 391             resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
 392             resp.getOutputStream().close();
 393             StatusLog.logPub(pubid, feedid, logurl, req.getMethod(), ctype, data.length(), ip, user,
 394                 HttpServletResponse.SC_NO_CONTENT);
 395         } catch (IOException ioe) {
 396             logger.info(
 397                 "NODE0110 IO Exception receiving publish attempt for feed " + feedid + " user " + user + " ip " + ip
 398                     + " " + ioe.toString(), ioe);
 399             throw ioe;
 400         } finally {
 401             if (is != null) {
 402                 try {
 403                     is.close();
 404                 } catch (Exception e) {
 405                 }
 406             }
 407             if (dos != null) {
 408                 try {
 409                     dos.close();
 410                 } catch (Exception e) {
 411                 }
 412             }
 413             if (mw != null) {
 414                 try {
 415                     mw.close();
 416                 } catch (Exception e) {
 417                 }
 418             }
 419             try {
 420                 data.delete();
 421             } catch (Exception e) {
 422             }
 423             try {
 424                 meta.delete();
 425             } catch (Exception e) {
 426             }
 427         }
 428     }
 429
 430     private int getIdFromPath(HttpServletRequest req) {
 431         String path = req.getPathInfo();
 432         if (path == null || path.length() < 2) {
 433             return -1;
 434         }
 435         try {
 436             return Integer.parseInt(path.substring(1));
 437         } catch (NumberFormatException e) {
 438             return -1;
 439         }
 440     }
 441 }