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