NodeHttp.java

   1 package org.argeo.cms.internal.http;
   2
   3 import java.io.IOException;
   4 import java.nio.file.Files;
   5 import java.nio.file.Path;
   6 import java.util.Properties;
   7
   8 import javax.jcr.Repository;
   9 import javax.servlet.ServletException;
  10 import javax.servlet.http.HttpServletRequest;
  11 import javax.servlet.http.HttpServletResponse;
  12
  13 import org.apache.commons.logging.Log;
  14 import org.apache.commons.logging.LogFactory;
  15 import org.apache.jackrabbit.server.SessionProvider;
  16 import org.apache.jackrabbit.server.remoting.davex.JcrRemotingServlet;
  17 import org.apache.jackrabbit.webdav.simple.SimpleWebdavServlet;
  18 import org.argeo.cms.CmsException;
  19 import org.argeo.cms.internal.kernel.KernelConstants;
  20 import org.argeo.node.NodeConstants;
  21 import org.osgi.framework.BundleContext;
  22 import org.osgi.framework.FrameworkUtil;
  23 import org.osgi.framework.ServiceReference;
  24 import org.osgi.service.http.HttpService;
  25 import org.osgi.service.http.NamespaceException;
  26 import org.osgi.util.tracker.ServiceTracker;
  27
  28 /**
  29  * Intercepts and enriches http access, mainly focusing on security and
  30  * transactionality.
  31  */
  32 public class NodeHttp implements KernelConstants {
  33         private final static Log log = LogFactory.getLog(NodeHttp.class);
  34
  35         // Filters
  36         // private final RootFilter rootFilter;
  37
  38         // private final DoSFilter dosFilter;
  39         // private final QoSFilter qosFilter;
  40
  41         private final BundleContext bc = FrameworkUtil.getBundle(getClass()).getBundleContext();
  42
  43         private ServiceTracker<Repository, Repository> repositories;
  44         private final ServiceTracker<HttpService, HttpService> httpServiceTracker;
  45
  46         public NodeHttp() {
  47                 // rootFilter = new RootFilter();
  48                 // dosFilter = new CustomDosFilter();
  49                 // qosFilter = new QoSFilter();
  50
  51                 httpServiceTracker = new PrepareHttpStc();
  52                 httpServiceTracker.open();
  53         }
  54
  55         // class CustomDosFilter extends DoSFilter {
  56         // @Override
  57         // protected String extractUserId(ServletRequest request) {
  58         // HttpSession httpSession = ((HttpServletRequest) request)
  59         // .getSession();
  60         // if (isSessionAuthenticated(httpSession)) {
  61         // String userId = ((SecurityContext) httpSession
  62         // .getAttribute(SPRING_SECURITY_CONTEXT_KEY))
  63         // .getAuthentication().getName();
  64         // return userId;
  65         // }
  66         // return super.extractUserId(request);
  67         //
  68         // }
  69         // }
  70
  71         public void destroy() {
  72                 repositories.close();
  73         }
  74
  75         void registerRepositoryServlets(HttpService httpService, String alias, Repository repository) {
  76                 if (httpService == null)
  77                         throw new CmsException("No HTTP service available");
  78                 try {
  79                         registerWebdavServlet(httpService, alias, repository);
  80                         registerRemotingServlet(httpService, alias, repository);
  81                         if (NodeConstants.HOME.equals(alias))
  82                                 registerFilesServlet(httpService, alias, repository);
  83                         if (log.isDebugEnabled())
  84                                 log.debug("Registered servlets for repository '" + alias + "'");
  85                 } catch (Exception e) {
  86                         throw new CmsException("Could not register servlets for repository '" + alias + "'", e);
  87                 }
  88         }
  89
  90         void unregisterRepositoryServlets(HttpService httpService, String alias) {
  91                 if (httpService == null)
  92                         return;
  93                 try {
  94                         httpService.unregister(webdavPath(alias));
  95                         httpService.unregister(remotingPath(alias));
  96                         httpService.unregister(filesPath(alias));
  97                         if (log.isDebugEnabled())
  98                                 log.debug("Unregistered servlets for repository '" + alias + "'");
  99                 } catch (Exception e) {
 100                         log.error("Could not unregister servlets for repository '" + alias + "'", e);
 101                 }
 102         }
 103
 104         void registerWebdavServlet(HttpService httpService, String alias, Repository repository)
 105                         throws NamespaceException, ServletException {
 106                 // WebdavServlet webdavServlet = new WebdavServlet(repository, new
 107                 // OpenInViewSessionProvider(alias));
 108                 WebdavServlet webdavServlet = new WebdavServlet(repository, new CmsSessionProvider(alias));
 109                 String path = webdavPath(alias);
 110                 Properties ip = new Properties();
 111                 ip.setProperty(WebdavServlet.INIT_PARAM_RESOURCE_CONFIG, HttpUtils.WEBDAV_CONFIG);
 112                 ip.setProperty(WebdavServlet.INIT_PARAM_RESOURCE_PATH_PREFIX, path);
 113                 httpService.registerServlet(path, webdavServlet, ip, new DataHttpContext());
 114         }
 115
 116         void registerFilesServlet(HttpService httpService, String alias, Repository repository)
 117                         throws NamespaceException, ServletException {
 118                 WebdavServlet filesServlet = new WebdavServlet(repository, new CmsSessionProvider(alias));
 119                 String path = filesPath(alias);
 120                 Properties ip = new Properties();
 121                 ip.setProperty(WebdavServlet.INIT_PARAM_RESOURCE_CONFIG, HttpUtils.WEBDAV_CONFIG);
 122                 ip.setProperty(WebdavServlet.INIT_PARAM_RESOURCE_PATH_PREFIX, path);
 123                 httpService.registerServlet(path, filesServlet, ip, new PrivateHttpContext());
 124         }
 125
 126         void registerRemotingServlet(HttpService httpService, String alias, Repository repository)
 127                         throws NamespaceException, ServletException {
 128                 RemotingServlet remotingServlet = new RemotingServlet(repository, new CmsSessionProvider(alias));
 129                 String path = remotingPath(alias);
 130                 Properties ip = new Properties();
 131                 ip.setProperty(JcrRemotingServlet.INIT_PARAM_RESOURCE_PATH_PREFIX, path);
 132
 133                 // Looks like a bug in Jackrabbit remoting init
 134                 Path tmpDir;
 135                 try {
 136                         tmpDir = Files.createTempDirectory("remoting_" + alias);
 137                 } catch (IOException e) {
 138                         throw new CmsException("Cannot create temp directory for remoting servlet", e);
 139                 }
 140                 ip.setProperty(RemotingServlet.INIT_PARAM_HOME, tmpDir.toString());
 141                 ip.setProperty(RemotingServlet.INIT_PARAM_TMP_DIRECTORY, "remoting_" + alias);
 142                 ip.setProperty(RemotingServlet.INIT_PARAM_PROTECTED_HANDLERS_CONFIG, HttpUtils.DEFAULT_PROTECTED_HANDLERS);
 143                 ip.setProperty(RemotingServlet.INIT_PARAM_CREATE_ABSOLUTE_URI, "false");
 144                 httpService.registerServlet(path, remotingServlet, ip, new PrivateHttpContext());
 145         }
 146
 147         private String webdavPath(String alias) {
 148                 return NodeConstants.PATH_DATA + "/" + alias;
 149         }
 150
 151         private String remotingPath(String alias) {
 152                 return NodeConstants.PATH_JCR + "/" + alias;
 153         }
 154
 155         private String filesPath(String alias) {
 156                 return NodeConstants.PATH_FILES;
 157         }
 158
 159         // private Subject subjectFromRequest(HttpServletRequest request,
 160         // HttpServletResponse response) {
 161         // Authorization authorization = (Authorization)
 162         // request.getAttribute(HttpContext.AUTHORIZATION);
 163         // if (authorization == null)
 164         // throw new CmsException("Not authenticated");
 165         // try {
 166         // LoginContext lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_USER,
 167         // new HttpRequestCallbackHandler(request, response));
 168         // lc.login();
 169         // return lc.getSubject();
 170         // } catch (LoginException e) {
 171         // throw new CmsException("Cannot login", e);
 172         // }
 173         // }
 174
 175         private class RepositoriesStc extends ServiceTracker<Repository, Repository> {
 176                 private final HttpService httpService;
 177
 178                 public RepositoriesStc(HttpService httpService) {
 179                         super(bc, Repository.class, null);
 180                         this.httpService = httpService;
 181                 }
 182
 183                 @Override
 184                 public Repository addingService(ServiceReference<Repository> reference) {
 185                         Repository repository = bc.getService(reference);
 186                         Object jcrRepoAlias = reference.getProperty(NodeConstants.CN);
 187                         if (jcrRepoAlias != null) {
 188                                 String alias = jcrRepoAlias.toString();
 189                                 registerRepositoryServlets(httpService, alias, repository);
 190                         }
 191                         return repository;
 192                 }
 193
 194                 @Override
 195                 public void modifiedService(ServiceReference<Repository> reference, Repository service) {
 196                 }
 197
 198                 @Override
 199                 public void removedService(ServiceReference<Repository> reference, Repository service) {
 200                         Object jcrRepoAlias = reference.getProperty(NodeConstants.CN);
 201                         if (jcrRepoAlias != null) {
 202                                 String alias = jcrRepoAlias.toString();
 203                                 unregisterRepositoryServlets(httpService, alias);
 204                         }
 205                 }
 206         }
 207
 208         private class PrepareHttpStc extends ServiceTracker<HttpService, HttpService> {
 209                 // private DataHttp dataHttp;
 210                 // private NodeHttp nodeHttp;
 211
 212                 public PrepareHttpStc() {
 213                         super(bc, HttpService.class, null);
 214                 }
 215
 216                 @Override
 217                 public HttpService addingService(ServiceReference<HttpService> reference) {
 218                         HttpService httpService = addHttpService(reference);
 219                         return httpService;
 220                 }
 221
 222                 @Override
 223                 public void removedService(ServiceReference<HttpService> reference, HttpService service) {
 224                         // if (dataHttp != null)
 225                         // dataHttp.destroy();
 226                         // dataHttp = null;
 227                         // if (nodeHttp != null)
 228                         // nodeHttp.destroy();
 229                         // nodeHttp = null;
 230                         // destroy();
 231                         repositories.close();
 232                         repositories = null;
 233                 }
 234
 235                 private HttpService addHttpService(ServiceReference<HttpService> sr) {
 236                         HttpService httpService = bc.getService(sr);
 237                         // TODO find constants
 238                         Object httpPort = sr.getProperty("http.port");
 239                         Object httpsPort = sr.getProperty("https.port");
 240
 241                         try {
 242                                 httpService.registerServlet("/!", new LinkServlet(), null, null);
 243                                 httpService.registerServlet("/robots.txt", new RobotServlet(), null, null);
 244                         } catch (Exception e) {
 245                                 throw new CmsException("Cannot register filters", e);
 246                         }
 247                         // track repositories
 248                         if (repositories != null)
 249                                 throw new CmsException("An http service is already configured");
 250                         repositories = new RepositoriesStc(httpService);
 251                         repositories.open();
 252                         log.info(httpPortsMsg(httpPort, httpsPort));
 253                         // httpAvailable = true;
 254                         // checkReadiness();
 255
 256                         bc.registerService(NodeHttp.class, NodeHttp.this, null);
 257                         return httpService;
 258                 }
 259
 260                 private String httpPortsMsg(Object httpPort, Object httpsPort) {
 261                         return "HTTP " + httpPort + (httpsPort != null ? " - HTTPS " + httpsPort : "");
 262                 }
 263         }
 264
 265         private class WebdavServlet extends SimpleWebdavServlet {
 266                 private static final long serialVersionUID = -4687354117811443881L;
 267                 private final Repository repository;
 268
 269                 public WebdavServlet(Repository repository, SessionProvider sessionProvider) {
 270                         this.repository = repository;
 271                         setSessionProvider(sessionProvider);
 272                 }
 273
 274                 public Repository getRepository() {
 275                         return repository;
 276                 }
 277
 278                 @Override
 279                 protected void service(final HttpServletRequest request, final HttpServletResponse response)
 280                                 throws ServletException, IOException {
 281                         WebdavServlet.super.service(request, response);
 282                         // try {
 283                         // Subject subject = subjectFromRequest(request);
 284                         // // TODO make it stronger, with eTags.
 285                         // // if (CurrentUser.isAnonymous(subject) &&
 286                         // // request.getMethod().equals("GET")) {
 287                         // // response.setHeader("Cache-Control", "no-transform, public,
 288                         // // max-age=300, s-maxage=900");
 289                         // // }
 290                         //
 291                         // Subject.doAs(subject, new PrivilegedExceptionAction<Void>() {
 292                         // @Override
 293                         // public Void run() throws Exception {
 294                         // WebdavServlet.super.service(request, response);
 295                         // return null;
 296                         // }
 297                         // });
 298                         // } catch (PrivilegedActionException e) {
 299                         // throw new CmsException("Cannot process webdav request",
 300                         // e.getException());
 301                         // }
 302                 }
 303         }
 304
 305         private class RemotingServlet extends JcrRemotingServlet {
 306                 private static final long serialVersionUID = 4605238259548058883L;
 307                 private final Repository repository;
 308                 private final SessionProvider sessionProvider;
 309
 310                 public RemotingServlet(Repository repository, SessionProvider sessionProvider) {
 311                         this.repository = repository;
 312                         this.sessionProvider = sessionProvider;
 313                 }
 314
 315                 @Override
 316                 protected Repository getRepository() {
 317                         return repository;
 318                 }
 319
 320                 @Override
 321                 protected SessionProvider getSessionProvider() {
 322                         return sessionProvider;
 323                 }
 324
 325                 @Override
 326                 protected void service(final HttpServletRequest request, final HttpServletResponse response)
 327                                 throws ServletException, IOException {
 328                         // try {
 329                         // Subject subject = subjectFromRequest(request, response);
 330                         // Subject.doAs(subject, new PrivilegedExceptionAction<Void>() {
 331                         // @Override
 332                         // public Void run() throws Exception {
 333                         RemotingServlet.super.service(request, response);
 334                         // return null;
 335                         // }
 336                         // });
 337                         // } catch (PrivilegedActionException e) {
 338                         // throw new CmsException("Cannot process JCR remoting request",
 339                         // e.getException());
 340                         // }
 341                 }
 342         }
 343
 344 }