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 static org.onap.dmaap.datarouter.node.NodeUtils.sendResponseError;
  28
  29 import com.att.eelf.configuration.EELFLogger;
  30 import com.att.eelf.configuration.EELFManager;
  31 import java.io.File;
  32 import java.io.FileOutputStream;
  33 import java.io.FileWriter;
  34 import java.io.IOException;
  35 import java.io.InputStream;
  36 import java.io.OutputStream;
  37 import java.io.Writer;
  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     //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
 177                             .getRemoteAddr());
 178             resp.sendError(HttpServletResponse.SC_FORBIDDEN, "https required on publish requests");
 179             return;
 180         }
 181         String fileid = req.getPathInfo();
 182         if (fileid == null) {
 183             logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 184                     .getRemoteAddr());
 185             resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 186                     "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.");
 187             return;
 188         }
 189         String feedid = null;
 190         String user = null;
 191         String credentials = req.getHeader("Authorization");
 192         if (credentials == null) {
 193             logger.info("NODE0106 Rejecting unauthenticated PUT or DELETE of " + req.getPathInfo() + " from " + req
 194                     .getRemoteAddr());
 195             resp.sendError(HttpServletResponse.SC_FORBIDDEN, "Authorization header required");
 196             return;
 197         }
 198         String ip = req.getRemoteAddr();
 199         String lip = req.getLocalAddr();
 200         String pubid = null;
 201         String xpubid = null;
 202         String rcvd = NodeUtils.logts(System.currentTimeMillis()) + ";from=" + ip + ";by=" + lip;
 203         Target[] targets = null;
 204         if (fileid.startsWith("/publish/")) {
 205             fileid = fileid.substring(9);
 206             int i = fileid.indexOf('/');
 207             if (i == -1 || i == fileid.length() - 1) {
 208                 logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 209                         .getRemoteAddr());
 210                 resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 211                         "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.  Possible missing fileid.");
 212                 return;
 213             }
 214             feedid = fileid.substring(0, i);
 215             fileid = fileid.substring(i + 1);
 216             pubid = config.getPublishId();
 217             xpubid = req.getHeader("X-ATT-DR-PUBLISH-ID");
 218             targets = config.getTargets(feedid);
 219         } else if (fileid.startsWith("/internal/publish/")) {
 220             if (!config.isAnotherNode(credentials, ip)) {
 221                 logger.info("NODE0107 Rejecting unauthorized node-to-node transfer attempt from " + ip);
 222                 resp.sendError(HttpServletResponse.SC_FORBIDDEN);
 223                 return;
 224             }
 225             fileid = fileid.substring(18);
 226             pubid = req.getHeader("X-ATT-DR-PUBLISH-ID");
 227             targets = config.parseRouting(req.getHeader("X-ATT-DR-ROUTING"));
 228         } else {
 229             logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 230                     .getRemoteAddr());
 231             resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 232                     "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.");
 233             return;
 234         }
 235         if (fileid.indexOf('/') != -1) {
 236             logger.info("NODE0105 Rejecting bad URI for PUT or DELETE of " + req.getPathInfo() + " from " + req
 237                     .getRemoteAddr());
 238             resp.sendError(HttpServletResponse.SC_NOT_FOUND,
 239                     "Invalid request URI.  Expecting <feed-publishing-url>/<fileid>.");
 240             return;
 241         }
 242         String qs = req.getQueryString();
 243         if (qs != null) {
 244             fileid = fileid + "?" + qs;
 245         }
 246         String hp = config.getMyName();
 247         int xp = config.getExtHttpsPort();
 248         if (xp != 443) {
 249             hp = hp + ":" + xp;
 250         }
 251         String logurl = "https://" + hp + "/internal/publish/" + fileid;
 252         if (feedid != null) {
 253             logurl = "https://" + hp + "/publish/" + feedid + "/" + fileid;
 254             String reason = config.isPublishPermitted(feedid, credentials, ip);
 255             if (reason != null) {
 256                 logger.info(
 257                         "NODE0111 Rejecting unauthorized publish attempt to feed " + feedid + " fileid " + fileid
 258                                 + " from "
 259                                 + ip + " reason " + reason);
 260                 resp.sendError(HttpServletResponse.SC_FORBIDDEN, reason);
 261                 return;
 262             }
 263             user = config.getAuthUser(feedid, credentials);
 264             String newnode = config.getIngressNode(feedid, user, ip);
 265             if (newnode != null) {
 266                 String port = "";
 267                 int iport = config.getExtHttpsPort();
 268                 if (iport != 443) {
 269                     port = ":" + iport;
 270                 }
 271                 String redirto = "https://" + newnode + port + "/publish/" + feedid + "/" + fileid;
 272                 logger.info(
 273                         "NODE0108 Redirecting publish attempt for feed " + feedid + " user " + user + " ip " + ip
 274                                 + " to "
 275                                 + redirto);
 276                 resp.sendRedirect(redirto);
 277                 return;
 278             }
 279             resp.setHeader("X-ATT-DR-PUBLISH-ID", pubid);
 280         }
 281         String fbase = config.getSpoolDir() + "/" + pubid;
 282         File data = new File(fbase);
 283         File meta = new File(fbase + ".M");
 284         OutputStream dos = null;
 285         InputStream is = null;
 286         try (Writer mw = new FileWriter(meta)) {
 287             StringBuffer mx = new StringBuffer();
 288             mx.append(req.getMethod()).append('\t').append(fileid).append('\n');
 289             Enumeration hnames = req.getHeaderNames();
 290             String ctype = null;
 291             while (hnames.hasMoreElements()) {
 292                 String hn = (String) hnames.nextElement();
 293                 String hnlc = hn.toLowerCase();
 294                 if ((isput && ("content-type".equals(hnlc) ||
 295                         "content-language".equals(hnlc) ||
 296                         "content-md5".equals(hnlc) ||
 297                         "content-range".equals(hnlc))) ||
 298                         "x-att-dr-meta".equals(hnlc) ||
 299                         (feedid == null && "x-att-dr-received".equals(hnlc)) ||
 300                         (hnlc.startsWith("x-") && !hnlc.startsWith("x-att-dr-"))) {
 301                     Enumeration hvals = req.getHeaders(hn);
 302                     while (hvals.hasMoreElements()) {
 303                         String hv = (String) hvals.nextElement();
 304                         if ("content-type".equals(hnlc)) {
 305                             ctype = hv;
 306                         }
 307                         if ("x-att-dr-meta".equals(hnlc)) {
 308                             if (hv.length() > 4096) {
 309                                 logger.info(
 310                                         "NODE0109 Rejecting publish attempt with metadata too long for feed " + feedid
 311                                                 + " user " + user + " ip " + ip);
 312                                 resp.sendError(HttpServletResponse.SC_BAD_REQUEST, "Metadata too long");
 313                                 return;
 314                             }
 315                             if (!MetaDataPattern.matcher(hv.replaceAll("\\\\.", "X")).matches()) {
 316                                 logger.info(
 317                                         "NODE0109 Rejecting publish attempt with malformed metadata for feed " + feedid
 318                                                 + " user " + user + " ip " + ip);
 319                                 resp.sendError(HttpServletResponse.SC_BAD_REQUEST, "Malformed metadata");
 320                                 return;
 321                             }
 322                         }
 323                         mx.append(hn).append('\t').append(hv).append('\n');
 324                     }
 325                 }
 326             }
 327             mx.append("X-ATT-DR-RECEIVED\t").append(rcvd).append('\n');
 328             String metadata = mx.toString();
 329             byte[] buf = new byte[1024 * 1024];
 330             int i;
 331             try {
 332                 is = req.getInputStream();
 333                 dos = new FileOutputStream(data);
 334                 while ((i = is.read(buf)) > 0) {
 335                     dos.write(buf, 0, i);
 336                 }
 337                 is.close();
 338                 is = null;
 339                 dos.close();
 340                 dos = null;
 341             } catch (IOException ioe) {
 342                 long exlen = -1;
 343                 try {
 344                     exlen = Long.parseLong(req.getHeader("Content-Length"));
 345                 } catch (Exception e) {
 346                 }
 347                 StatusLog.logPubFail(pubid, feedid, logurl, req.getMethod(), ctype, exlen, data.length(), ip, user,
 348                         ioe.getMessage());
 349                 throw ioe;
 350             }
 351             Path dpath = Paths.get(fbase);
 352             for (Target t : targets) {
 353                 DestInfo di = t.getDestInfo();
 354                 if (di == null) {
 355                     // TODO: unknown destination
 356                     continue;
 357                 }
 358                 String dbase = di.getSpool() + "/" + pubid;
 359                 Files.createLink(Paths.get(dbase), dpath);
 360                 mw.write(metadata);
 361                 if (di.getSubId() == null) {
 362                     mw.write("X-ATT-DR-ROUTING\t" + t.getRouting() + "\n");
 363                 }
 364                 meta.renameTo(new File(dbase + ".M"));
 365             }
 366             resp.setStatus(HttpServletResponse.SC_NO_CONTENT);
 367             resp.getOutputStream().close();
 368             StatusLog.logPub(pubid, feedid, logurl, req.getMethod(), ctype, data.length(), ip, user,
 369                     HttpServletResponse.SC_NO_CONTENT);
 370         } catch (IOException ioe) {
 371             logger.info(
 372                     "NODE0110 IO Exception receiving publish attempt for feed " + feedid + " user " + user + " ip " + ip
 373                             + " " + ioe.toString(), ioe);
 374             throw ioe;
 375         } finally {
 376             if (is != null) {
 377                 try {
 378                     is.close();
 379                 } catch (Exception e) {
 380                 }
 381             }
 382             if (dos != null) {
 383                 try {
 384                     dos.close();
 385                 } catch (Exception e) {
 386                 }
 387             }
 388             try {
 389                 data.delete();
 390             } catch (Exception e) {
 391             }
 392             try {
 393                 meta.delete();
 394             } catch (Exception e) {
 395             }
 396         }
 397     }
 398
 399     private int getIdFromPath(HttpServletRequest req) {
 400         String path = req.getPathInfo();
 401         if (path == null || path.length() < 2) {
 402             return -1;
 403         }
 404         try {
 405             return Integer.parseInt(path.substring(1));
 406         } catch (NumberFormatException e) {
 407             return -1;
 408         }
 409     }
 410 }