source.dussan.org Git - archiva.git/blob

   1 package org.apache.archiva.web.rss;
   2
   3 /*
   4  * Licensed to the Apache Software Foundation (ASF) under one
   5  * or more contributor license agreements.  See the NOTICE file
   6  * distributed with this work for additional information
   7  * regarding copyright ownership.  The ASF licenses this file
   8  * to you under the Apache License, Version 2.0 (the
   9  * "License"); you may not use this file except in compliance
  10  * with the License.  You may obtain a copy of the License at
  11  *
  12  *  http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing,
  15  * software distributed under the License is distributed on an
  16  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  17  * KIND, either express or implied.  See the License for the
  18  * specific language governing permissions and limitations
  19  * under the License.
  20  */
  21
  22 import com.sun.syndication.feed.synd.SyndFeed;
  23 import com.sun.syndication.io.FeedException;
  24 import com.sun.syndication.io.SyndFeedOutput;
  25 import org.apache.archiva.metadata.repository.RepositorySession;
  26 import org.apache.archiva.metadata.repository.RepositorySessionFactory;
  27 import org.apache.archiva.redback.users.UserManager;
  28 import org.apache.archiva.redback.users.UserNotFoundException;
  29 import org.apache.archiva.rss.processor.RssFeedProcessor;
  30 import org.apache.archiva.security.AccessDeniedException;
  31 import org.apache.archiva.security.ArchivaSecurityException;
  32 import org.apache.archiva.security.PrincipalNotFoundException;
  33 import org.apache.archiva.security.ServletAuthenticator;
  34 import org.apache.archiva.security.UserRepositories;
  35 import org.apache.archiva.security.common.ArchivaRoleConstants;
  36 import org.apache.commons.codec.Decoder;
  37 import org.apache.commons.codec.DecoderException;
  38 import org.apache.commons.codec.binary.Base64;
  39 import org.apache.commons.lang.StringUtils;
  40 import org.codehaus.plexus.redback.authentication.AuthenticationException;
  41 import org.codehaus.plexus.redback.authentication.AuthenticationResult;
  42 import org.codehaus.plexus.redback.authorization.AuthorizationException;
  43 import org.codehaus.plexus.redback.authorization.UnauthorizedException;
  44 import org.codehaus.plexus.redback.policy.AccountLockedException;
  45 import org.codehaus.plexus.redback.policy.MustChangePasswordException;
  46 import org.codehaus.plexus.redback.system.SecuritySession;
  47 import org.codehaus.redback.integration.filter.authentication.HttpAuthenticator;
  48 import org.slf4j.Logger;
  49 import org.slf4j.LoggerFactory;
  50 import org.springframework.web.context.WebApplicationContext;
  51 import org.springframework.web.context.support.WebApplicationContextUtils;
  52
  53 import javax.servlet.ServletException;
  54 import javax.servlet.http.HttpServlet;
  55 import javax.servlet.http.HttpServletRequest;
  56 import javax.servlet.http.HttpServletResponse;
  57 import java.io.IOException;
  58 import java.util.ArrayList;
  59 import java.util.Collections;
  60 import java.util.HashMap;
  61 import java.util.List;
  62 import java.util.Map;
  63
  64 /**
  65  * Servlet for handling rss feed requests.
  66  */
  67 public class RssFeedServlet
  68     extends HttpServlet
  69 {
  70     public static final String MIME_TYPE = "application/rss+xml; charset=UTF-8";
  71
  72     private static final String COULD_NOT_GENERATE_FEED_ERROR = "Could not generate feed";
  73
  74     private static final String COULD_NOT_AUTHENTICATE_USER = "Could not authenticate user";
  75
  76     private static final String USER_NOT_AUTHORIZED = "User not authorized to access feed.";
  77
  78     private Logger log = LoggerFactory.getLogger( RssFeedServlet.class );
  79
  80     private RssFeedProcessor processor;
  81
  82     private WebApplicationContext wac;
  83
  84     private UserRepositories userRepositories;
  85
  86     private ServletAuthenticator servletAuth;
  87
  88     private HttpAuthenticator httpAuth;
  89
  90     private RepositorySessionFactory repositorySessionFactory;
  91
  92     public void init( javax.servlet.ServletConfig servletConfig )
  93         throws ServletException
  94     {
  95         super.init( servletConfig );
  96         wac = WebApplicationContextUtils.getRequiredWebApplicationContext( servletConfig.getServletContext() );
  97         userRepositories = wac.getBean( UserRepositories.class );
  98         servletAuth = wac.getBean( ServletAuthenticator.class );
  99         httpAuth = wac.getBean( "httpAuthenticator#basic", HttpAuthenticator.class );
 100         // TODO: what if there are other types?
 101         repositorySessionFactory = wac.getBean( "repositorySessionFactory", RepositorySessionFactory.class );
 102     }
 103
 104     public void doGet( HttpServletRequest req, HttpServletResponse res )
 105         throws ServletException, IOException
 106     {
 107         String repoId = null;
 108         String groupId = null;
 109         String artifactId = null;
 110
 111         String url = StringUtils.removeEnd( req.getRequestURL().toString(), "/" );
 112         if ( StringUtils.countMatches( StringUtils.substringAfter( url, "feeds/" ), "/" ) > 0 )
 113         {
 114             artifactId = StringUtils.substringAfterLast( url, "/" );
 115             groupId = StringUtils.substringBeforeLast( StringUtils.substringAfter( url, "feeds/" ), "/" );
 116             groupId = StringUtils.replaceChars( groupId, '/', '.' );
 117         }
 118         else if ( StringUtils.countMatches( StringUtils.substringAfter( url, "feeds/" ), "/" ) == 0 )
 119         {
 120             repoId = StringUtils.substringAfterLast( url, "/" );
 121         }
 122         else
 123         {
 124             res.sendError( HttpServletResponse.SC_BAD_REQUEST, "Invalid request url." );
 125             return;
 126         }
 127
 128         try
 129         {
 130             Map<String, String> map = new HashMap<String, String>();
 131             SyndFeed feed = null;
 132
 133             if ( isAllowed( req, repoId, groupId, artifactId ) )
 134             {
 135                 if ( repoId != null )
 136                 {
 137                     // new artifacts in repo feed request
 138                     processor = wac.getBean( "rssFeedProcessor#new-artifacts", RssFeedProcessor.class );
 139                     map.put( RssFeedProcessor.KEY_REPO_ID, repoId );
 140                 }
 141                 else if ( ( groupId != null ) && ( artifactId != null ) )
 142                 {
 143                     // TODO: this only works for guest - we could pass in the list of repos
 144                     // new versions of artifact feed request
 145                     processor = wac.getBean( "rssFeedProcessor#new-versions", RssFeedProcessor.class );
 146                     map.put( RssFeedProcessor.KEY_GROUP_ID, groupId );
 147                     map.put( RssFeedProcessor.KEY_ARTIFACT_ID, artifactId );
 148                 }
 149             }
 150             else
 151             {
 152                 res.sendError( HttpServletResponse.SC_UNAUTHORIZED, USER_NOT_AUTHORIZED );
 153                 return;
 154             }
 155
 156             RepositorySession repositorySession = repositorySessionFactory.createSession();
 157             try
 158             {
 159                 feed = processor.process( map, repositorySession.getRepository() );
 160             }
 161             finally
 162             {
 163                 repositorySession.close();
 164             }
 165             if ( feed == null )
 166             {
 167                 res.sendError( HttpServletResponse.SC_NO_CONTENT, "No information available." );
 168                 return;
 169             }
 170
 171             res.setContentType( MIME_TYPE );
 172
 173             if ( repoId != null )
 174             {
 175                 feed.setLink( req.getRequestURL().toString() );
 176             }
 177             else if ( ( groupId != null ) && ( artifactId != null ) )
 178             {
 179                 feed.setLink( req.getRequestURL().toString() );
 180             }
 181
 182             SyndFeedOutput output = new SyndFeedOutput();
 183             output.output( feed, res.getWriter() );
 184         }
 185         catch ( UserNotFoundException unfe )
 186         {
 187             log.debug( COULD_NOT_AUTHENTICATE_USER, unfe );
 188             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
 189         }
 190         catch ( AccountLockedException acce )
 191         {
 192             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
 193         }
 194         catch ( AuthenticationException authe )
 195         {
 196             log.debug( COULD_NOT_AUTHENTICATE_USER, authe );
 197             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
 198         }
 199         catch ( FeedException ex )
 200         {
 201             log.debug( COULD_NOT_GENERATE_FEED_ERROR, ex );
 202             res.sendError( HttpServletResponse.SC_INTERNAL_SERVER_ERROR, COULD_NOT_GENERATE_FEED_ERROR );
 203         }
 204         catch ( MustChangePasswordException e )
 205         {
 206             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
 207         }
 208         catch ( UnauthorizedException e )
 209         {
 210             log.debug( e.getMessage() );
 211             if ( repoId != null )
 212             {
 213                 res.setHeader( "WWW-Authenticate",
 214                                "Basic realm=\"Repository Archiva Managed " + repoId + " Repository" );
 215             }
 216             else
 217             {
 218                 res.setHeader( "WWW-Authenticate", "Basic realm=\"Artifact " + groupId + ":" + artifactId );
 219             }
 220
 221             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, USER_NOT_AUTHORIZED );
 222         }
 223     }
 224
 225     /**
 226      * Basic authentication.
 227      *
 228      * @param req
 229      * @param repositoryId TODO
 230      * @param groupId      TODO
 231      * @param artifactId   TODO
 232      * @return
 233      */
 234     private boolean isAllowed( HttpServletRequest req, String repositoryId, String groupId, String artifactId )
 235         throws UserNotFoundException, AccountLockedException, AuthenticationException, MustChangePasswordException,
 236         UnauthorizedException
 237     {
 238         String auth = req.getHeader( "Authorization" );
 239         List<String> repoIds = new ArrayList<String>();
 240
 241         if ( repositoryId != null )
 242         {
 243             repoIds.add( repositoryId );
 244         }
 245         else if ( artifactId != null && groupId != null )
 246         {
 247             if ( auth != null )
 248             {
 249                 if ( !auth.toUpperCase().startsWith( "BASIC " ) )
 250                 {
 251                     return false;
 252                 }
 253
 254                 Decoder dec = new Base64();
 255                 String usernamePassword = "";
 256
 257                 try
 258                 {
 259                     usernamePassword = new String( (byte[]) dec.decode( auth.substring( 6 ).getBytes() ) );
 260                 }
 261                 catch ( DecoderException ie )
 262                 {
 263                     log.warn( "Error decoding username and password.", ie.getMessage() );
 264                 }
 265
 266                 if ( usernamePassword == null || usernamePassword.trim().equals( "" ) )
 267                 {
 268                     repoIds = getObservableRepos( UserManager.GUEST_USERNAME );
 269                 }
 270                 else
 271                 {
 272                     String[] userCredentials = usernamePassword.split( ":" );
 273                     repoIds = getObservableRepos( userCredentials[0] );
 274                 }
 275             }
 276             else
 277             {
 278                 repoIds = getObservableRepos( UserManager.GUEST_USERNAME );
 279             }
 280         }
 281         else
 282         {
 283             return false;
 284         }
 285
 286         for ( String repoId : repoIds )
 287         {
 288             try
 289             {
 290                 AuthenticationResult result = httpAuth.getAuthenticationResult( req, null );
 291                 SecuritySession securitySession = httpAuth.getSecuritySession( req.getSession( true ) );
 292
 293                 if ( servletAuth.isAuthenticated( req, result ) && servletAuth.isAuthorized( req, securitySession,
 294                                                                                              repoId,
 295                                                                                              ArchivaRoleConstants.OPERATION_REPOSITORY_ACCESS ) )
 296                 {
 297                     return true;
 298                 }
 299             }
 300             catch ( AuthorizationException e )
 301             {
 302
 303             }
 304             catch ( UnauthorizedException e )
 305             {
 306
 307             }
 308         }
 309
 310         throw new UnauthorizedException( "Access denied." );
 311     }
 312
 313     private List<String> getObservableRepos( String principal )
 314     {
 315         try
 316         {
 317             return userRepositories.getObservableRepositoryIds( principal );
 318         }
 319         catch ( PrincipalNotFoundException e )
 320         {
 321             log.warn( e.getMessage(), e );
 322         }
 323         catch ( AccessDeniedException e )
 324         {
 325             log.warn( e.getMessage(), e );
 326         }
 327         catch ( ArchivaSecurityException e )
 328         {
 329             log.warn( e.getMessage(), e );
 330         }
 331
 332         return Collections.emptyList();
 333     }
 334
 335 }