org.argeo.cms.ui.rap/src/org/argeo/cms/web/AbstractCmsEntryPoint.java

   1 package org.argeo.cms.web;
   2
   3 import static org.argeo.naming.SharedSecret.X_SHARED_SECRET;
   4
   5 import java.io.IOException;
   6 import java.security.PrivilegedAction;
   7 import java.util.HashMap;
   8 import java.util.Map;
   9
  10 import javax.jcr.Node;
  11 import javax.jcr.PathNotFoundException;
  12 import javax.jcr.Property;
  13 import javax.jcr.Repository;
  14 import javax.jcr.RepositoryException;
  15 import javax.jcr.Session;
  16 import javax.jcr.nodetype.NodeType;
  17 import javax.security.auth.Subject;
  18 import javax.security.auth.callback.Callback;
  19 import javax.security.auth.callback.UnsupportedCallbackException;
  20 import javax.security.auth.login.LoginContext;
  21 import javax.security.auth.login.LoginException;
  22 import javax.servlet.http.HttpServletRequest;
  23
  24 import org.apache.commons.logging.Log;
  25 import org.apache.commons.logging.LogFactory;
  26 import org.argeo.api.NodeConstants;
  27 import org.argeo.api.cms.CmsView;
  28 import org.argeo.cms.CmsException;
  29 import org.argeo.cms.auth.CurrentUser;
  30 import org.argeo.cms.auth.HttpRequestCallback;
  31 import org.argeo.cms.auth.HttpRequestCallbackHandler;
  32 import org.argeo.cms.swt.CmsStyles;
  33 import org.argeo.cms.swt.CmsSwtUtils;
  34 import org.argeo.eclipse.ui.specific.UiContext;
  35 import org.argeo.jcr.JcrUtils;
  36 import org.argeo.naming.AuthPassword;
  37 import org.argeo.naming.SharedSecret;
  38 import org.eclipse.rap.rwt.RWT;
  39 import org.eclipse.rap.rwt.application.AbstractEntryPoint;
  40 import org.eclipse.rap.rwt.client.WebClient;
  41 import org.eclipse.rap.rwt.client.service.BrowserNavigation;
  42 import org.eclipse.rap.rwt.client.service.BrowserNavigationEvent;
  43 import org.eclipse.rap.rwt.client.service.BrowserNavigationListener;
  44 import org.eclipse.rap.rwt.client.service.JavaScriptExecutor;
  45 import org.eclipse.swt.widgets.Composite;
  46 import org.eclipse.swt.widgets.Display;
  47 import org.eclipse.swt.widgets.Shell;
  48
  49 /** Manages history and navigation */
  50 @Deprecated
  51 public abstract class AbstractCmsEntryPoint extends AbstractEntryPoint implements CmsView {
  52         private static final long serialVersionUID = 906558779562569784L;
  53
  54         private final Log log = LogFactory.getLog(AbstractCmsEntryPoint.class);
  55
  56         // private final Subject subject;
  57         private LoginContext loginContext;
  58
  59         private final Repository repository;
  60         private final String workspace;
  61         private final String defaultPath;
  62         private final Map<String, String> factoryProperties;
  63
  64         // Current state
  65         private Session session;
  66         private Node node;
  67         private String nodePath;// useful when changing auth
  68         private String state;
  69         private Throwable exception;
  70
  71         // Client services
  72         private final JavaScriptExecutor jsExecutor;
  73         private final BrowserNavigation browserNavigation;
  74
  75         public AbstractCmsEntryPoint(Repository repository, String workspace, String defaultPath,
  76                         Map<String, String> factoryProperties) {
  77                 this.repository = repository;
  78                 this.workspace = workspace;
  79                 this.defaultPath = defaultPath;
  80                 this.factoryProperties = new HashMap<String, String>(factoryProperties);
  81                 // subject = new Subject();
  82
  83                 // Initial login
  84                 LoginContext lc;
  85                 try {
  86                         lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_USER,
  87                                         new HttpRequestCallbackHandler(UiContext.getHttpRequest(), UiContext.getHttpResponse()));
  88                         lc.login();
  89                 } catch (LoginException e) {
  90                         try {
  91                                 lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_ANONYMOUS);
  92                                 lc.login();
  93                         } catch (LoginException e1) {
  94                                 throw new CmsException("Cannot log in as anonymous", e1);
  95                         }
  96                 }
  97                 authChange(lc);
  98
  99                 jsExecutor = RWT.getClient().getService(JavaScriptExecutor.class);
 100                 browserNavigation = RWT.getClient().getService(BrowserNavigation.class);
 101                 if (browserNavigation != null)
 102                         browserNavigation.addBrowserNavigationListener(new CmsNavigationListener());
 103         }
 104
 105         @Override
 106         protected Shell createShell(Display display) {
 107                 Shell shell = super.createShell(display);
 108                 shell.setData(RWT.CUSTOM_VARIANT, CmsStyles.CMS_SHELL);
 109                 display.disposeExec(new Runnable() {
 110
 111                         @Override
 112                         public void run() {
 113                                 if (log.isTraceEnabled())
 114                                         log.trace("Logging out " + session);
 115                                 JcrUtils.logoutQuietly(session);
 116                         }
 117                 });
 118                 return shell;
 119         }
 120
 121         @Override
 122         protected final void createContents(final Composite parent) {
 123                 // UiContext.setData(CmsView.KEY, this);
 124                 CmsSwtUtils.registerCmsView(parent.getShell(), this);
 125                 Subject.doAs(getSubject(), new PrivilegedAction<Void>() {
 126                         @Override
 127                         public Void run() {
 128                                 try {
 129                                         initUi(parent);
 130                                 } catch (Exception e) {
 131                                         throw new CmsException("Cannot create entrypoint contents", e);
 132                                 }
 133                                 return null;
 134                         }
 135                 });
 136         }
 137
 138         /** Create UI */
 139         protected abstract void initUi(Composite parent);
 140
 141         /** Recreate UI after navigation or auth change */
 142         protected abstract void refresh();
 143
 144         /**
 145          * The node to return when no node was found (for authenticated users and
 146          * anonymous)
 147          */
 148 //      private Node getDefaultNode(Session session) throws RepositoryException {
 149 //              if (!session.hasPermission(defaultPath, "read")) {
 150 //                      String userId = session.getUserID();
 151 //                      if (userId.equals(NodeConstants.ROLE_ANONYMOUS))
 152 //                              // TODO throw a special exception
 153 //                              throw new CmsException("Login required");
 154 //                      else
 155 //                              throw new CmsException("Unauthorized");
 156 //              }
 157 //              return session.getNode(defaultPath);
 158 //      }
 159
 160         protected String getBaseTitle() {
 161                 return factoryProperties.get(WebClient.PAGE_TITLE);
 162         }
 163
 164         public void navigateTo(String state) {
 165                 exception = null;
 166                 String title = setState(state);
 167                 doRefresh();
 168                 if (browserNavigation != null)
 169                         browserNavigation.pushState(state, title);
 170         }
 171
 172         // @Override
 173         // public synchronized Subject getSubject() {
 174         // return subject;
 175         // }
 176
 177         // @Override
 178         // public LoginContext getLoginContext() {
 179         // return loginContext;
 180         // }
 181         protected Subject getSubject() {
 182                 return loginContext.getSubject();
 183         }
 184
 185         @Override
 186         public boolean isAnonymous() {
 187                 return CurrentUser.isAnonymous(getSubject());
 188         }
 189
 190         @Override
 191         public synchronized void logout() {
 192                 if (loginContext == null)
 193                         throw new CmsException("Login context should not be null");
 194                 try {
 195                         CurrentUser.logoutCmsSession(loginContext.getSubject());
 196                         loginContext.logout();
 197                         LoginContext anonymousLc = new LoginContext(NodeConstants.LOGIN_CONTEXT_ANONYMOUS);
 198                         anonymousLc.login();
 199                         authChange(anonymousLc);
 200                 } catch (LoginException e) {
 201                         log.error("Cannot logout", e);
 202                 }
 203         }
 204
 205         @Override
 206         public synchronized void authChange(LoginContext lc) {
 207                 if (lc == null)
 208                         throw new CmsException("Login context cannot be null");
 209                 // logout previous login context
 210                 if (this.loginContext != null)
 211                         try {
 212                                 this.loginContext.logout();
 213                         } catch (LoginException e1) {
 214                                 log.warn("Could not log out: " + e1);
 215                         }
 216                 this.loginContext = lc;
 217                 Subject.doAs(getSubject(), new PrivilegedAction<Void>() {
 218
 219                         @Override
 220                         public Void run() {
 221                                 try {
 222                                         JcrUtils.logoutQuietly(session);
 223                                         session = repository.login(workspace);
 224                                         if (nodePath != null)
 225                                                 try {
 226                                                         node = session.getNode(nodePath);
 227                                                 } catch (PathNotFoundException e) {
 228                                                         navigateTo("~");
 229                                                 }
 230
 231                                         // refresh UI
 232                                         doRefresh();
 233                                 } catch (RepositoryException e) {
 234                                         throw new CmsException("Cannot perform auth change", e);
 235                                 }
 236                                 return null;
 237                         }
 238
 239                 });
 240         }
 241
 242         @Override
 243         public void exception(final Throwable e) {
 244                 AbstractCmsEntryPoint.this.exception = e;
 245                 log.error("Unexpected exception in CMS", e);
 246                 doRefresh();
 247         }
 248
 249         protected synchronized void doRefresh() {
 250                 Subject.doAs(getSubject(), new PrivilegedAction<Void>() {
 251                         @Override
 252                         public Void run() {
 253                                 refresh();
 254                                 return null;
 255                         }
 256                 });
 257         }
 258
 259         /** Sets the state of the entry point and retrieve the related JCR node. */
 260         protected synchronized String setState(String newState) {
 261                 String previousState = this.state;
 262
 263                 String newNodePath = null;
 264                 String prefix = null;
 265                 this.state = newState;
 266                 if (newState.equals("~"))
 267                         this.state = "";
 268
 269                 try {
 270                         int firstSlash = state.indexOf('/');
 271                         if (firstSlash == 0) {
 272                                 newNodePath = state;
 273                                 prefix = "";
 274                         } else if (firstSlash > 0) {
 275                                 prefix = state.substring(0, firstSlash);
 276                                 newNodePath = state.substring(firstSlash);
 277                         } else {
 278                                 newNodePath = defaultPath;
 279                                 prefix = state;
 280
 281                         }
 282
 283                         // auth
 284                         int colonIndex = prefix.indexOf('$');
 285                         if (colonIndex > 0) {
 286                                 SharedSecret token = new SharedSecret(new AuthPassword(X_SHARED_SECRET + '$' + prefix)) {
 287
 288                                         @Override
 289                                         public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
 290                                                 super.handle(callbacks);
 291                                                 // handle HTTP context
 292                                                 for (Callback callback : callbacks) {
 293                                                         if (callback instanceof HttpRequestCallback) {
 294                                                                 ((HttpRequestCallback) callback).setRequest(UiContext.getHttpRequest());
 295                                                                 ((HttpRequestCallback) callback).setResponse(UiContext.getHttpResponse());
 296                                                         }
 297                                                 }
 298                                         }
 299                                 };
 300                                 LoginContext lc = new LoginContext(NodeConstants.LOGIN_CONTEXT_USER, token);
 301                                 lc.login();
 302                                 authChange(lc);// sets the node as well
 303                                 // } else {
 304                                 // // TODO check consistency
 305                                 // }
 306                         } else {
 307                                 Node newNode = null;
 308                                 if (session.nodeExists(newNodePath))
 309                                         newNode = session.getNode(newNodePath);
 310                                 else {
 311 //                                      throw new CmsException("Data " + newNodePath + " does not exist");
 312                                         newNode = null;
 313                                 }
 314                                 setNode(newNode);
 315                         }
 316                         String title = publishMetaData(getNode());
 317
 318                         if (log.isTraceEnabled())
 319                                 log.trace("node=" + newNodePath + ", state=" + state + " (prefix=" + prefix + ")");
 320
 321                         return title;
 322                 } catch (Exception e) {
 323                         log.error("Cannot set state '" + state + "'", e);
 324                         if (state.equals("") || newState.equals("~") || newState.equals(previousState))
 325                                 return "Unrecoverable exception : " + e.getClass().getSimpleName();
 326                         if (previousState.equals(""))
 327                                 previousState = "~";
 328                         navigateTo(previousState);
 329                         throw new CmsException("Unexpected issue when accessing #" + newState, e);
 330                 }
 331         }
 332
 333         private String publishMetaData(Node node) throws RepositoryException {
 334                 // Title
 335                 String title;
 336                 if (node != null && node.isNodeType(NodeType.MIX_TITLE) && node.hasProperty(Property.JCR_TITLE))
 337                         title = node.getProperty(Property.JCR_TITLE).getString() + " - " + getBaseTitle();
 338                 else
 339                         title = getBaseTitle();
 340
 341                 HttpServletRequest request = UiContext.getHttpRequest();
 342                 if (request == null)
 343                         return null;
 344
 345                 StringBuilder js = new StringBuilder();
 346                 if (title == null)
 347                         title = "";
 348                 title = title.replace("'", "\\'");// sanitize
 349                 js.append("document.title = '" + title + "';");
 350                 jsExecutor.execute(js.toString());
 351                 return title;
 352         }
 353
 354         // Simply remove some illegal character
 355         // private String clean(String stringToClean) {
 356         // return stringToClean.replaceAll("'", "").replaceAll("\\n", "")
 357         // .replaceAll("\\t", "");
 358         // }
 359
 360         protected synchronized Node getNode() {
 361                 return node;
 362         }
 363
 364         private synchronized void setNode(Node node) throws RepositoryException {
 365                 this.node = node;
 366                 this.nodePath = node == null ? null : node.getPath();
 367         }
 368
 369         protected String getState() {
 370                 return state;
 371         }
 372
 373         protected Throwable getException() {
 374                 return exception;
 375         }
 376
 377         protected void resetException() {
 378                 exception = null;
 379         }
 380
 381         protected Session getSession() {
 382                 return session;
 383         }
 384
 385         private class CmsNavigationListener implements BrowserNavigationListener {
 386                 private static final long serialVersionUID = -3591018803430389270L;
 387
 388                 @Override
 389                 public void navigated(BrowserNavigationEvent event) {
 390                         setState(event.getState());
 391                         doRefresh();
 392                 }
 393         }
 394 }