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.authentication.AuthenticationException;
  28 import org.apache.archiva.redback.policy.AccountLockedException;
  29 import org.apache.archiva.redback.policy.MustChangePasswordException;
  30 import org.apache.archiva.redback.users.UserManager;
  31 import org.apache.archiva.redback.users.UserNotFoundException;
  32 import org.apache.archiva.rss.processor.RssFeedProcessor;
  33 import org.apache.archiva.security.AccessDeniedException;
  34 import org.apache.archiva.security.ArchivaSecurityException;
  35 import org.apache.archiva.security.PrincipalNotFoundException;
  36 import org.apache.archiva.security.ServletAuthenticator;
  37 import org.apache.archiva.security.UserRepositories;
  38 import org.apache.archiva.security.common.ArchivaRoleConstants;
  39 import org.apache.commons.codec.Decoder;
  40 import org.apache.commons.codec.DecoderException;
  41 import org.apache.commons.codec.binary.Base64;
  42 import org.apache.commons.lang.StringUtils;
  43 import org.apache.archiva.redback.authentication.AuthenticationResult;
  44 import org.apache.archiva.redback.authorization.AuthorizationException;
  45 import org.apache.archiva.redback.authorization.UnauthorizedException;
  46 import org.apache.archiva.redback.system.SecuritySession;
  47 import org.apache.archiva.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.ServletConfig;
  54 import javax.servlet.ServletException;
  55 import javax.servlet.http.HttpServlet;
  56 import javax.servlet.http.HttpServletRequest;
  57 import javax.servlet.http.HttpServletResponse;
  58 import java.io.IOException;
  59 import java.util.ArrayList;
  60 import java.util.Collections;
  61 import java.util.HashMap;
  62 import java.util.List;
  63 import java.util.Map;
  64
  65 /**
  66  * Servlet for handling rss feed requests.
  67  */
  68 public class RssFeedServlet
  69     extends HttpServlet
  70 {
  71     public static final String MIME_TYPE = "application/rss+xml; charset=UTF-8";
  72
  73     private static final String COULD_NOT_GENERATE_FEED_ERROR = "Could not generate feed";
  74
  75     private static final String COULD_NOT_AUTHENTICATE_USER = "Could not authenticate user";
  76
  77     private static final String USER_NOT_AUTHORIZED = "User not authorized to access feed.";
  78
  79     private Logger log = LoggerFactory.getLogger( RssFeedServlet.class );
  80
  81     private WebApplicationContext wac;
  82
  83     private UserRepositories userRepositories;
  84
  85     private ServletAuthenticator servletAuth;
  86
  87     private HttpAuthenticator httpAuth;
  88
  89     /**
  90      * FIXME: this could be multiple implementations and needs to be configured.
  91      */
  92     private RepositorySessionFactory repositorySessionFactory;
  93
  94     @Override
  95     public void init( ServletConfig servletConfig )
  96         throws ServletException
  97     {
  98         super.init( servletConfig );
  99         wac = WebApplicationContextUtils.getRequiredWebApplicationContext( servletConfig.getServletContext() );
 100         userRepositories = wac.getBean( UserRepositories.class );
 101         servletAuth = wac.getBean( ServletAuthenticator.class );
 102         httpAuth = wac.getBean( "httpAuthenticator#basic", HttpAuthenticator.class );
 103         // TODO: what if there are other types?
 104         repositorySessionFactory = wac.getBean( "repositorySessionFactory", RepositorySessionFactory.class );
 105     }
 106
 107     @Override
 108     public void doGet( HttpServletRequest req, HttpServletResponse res )
 109         throws ServletException, IOException
 110     {
 111         String repoId = null;
 112         String groupId = null;
 113         String artifactId = null;
 114
 115         String url = StringUtils.removeEnd( req.getRequestURL().toString(), "/" );
 116         if ( StringUtils.countMatches( StringUtils.substringAfter( url, "feeds/" ), "/" ) > 0 )
 117         {
 118             artifactId = StringUtils.substringAfterLast( url, "/" );
 119             groupId = StringUtils.substringBeforeLast( StringUtils.substringAfter( url, "feeds/" ), "/" );
 120             groupId = StringUtils.replaceChars( groupId, '/', '.' );
 121         }
 122         else if ( StringUtils.countMatches( StringUtils.substringAfter( url, "feeds/" ), "/" ) == 0 )
 123         {
 124             repoId = StringUtils.substringAfterLast( url, "/" );
 125         }
 126         else
 127         {
 128             res.sendError( HttpServletResponse.SC_BAD_REQUEST, "Invalid request url." );
 129             return;
 130         }
 131
 132         RssFeedProcessor processor = null;
 133
 134         try
 135         {
 136             Map<String, String> map = new HashMap<>();
 137             SyndFeed feed = null;
 138
 139             if ( isAllowed( req, repoId, groupId, artifactId ) )
 140             {
 141                 if ( repoId != null )
 142                 {
 143                     // new artifacts in repo feed request
 144                     processor = wac.getBean( "rssFeedProcessor#new-artifacts", RssFeedProcessor.class );
 145                     map.put( RssFeedProcessor.KEY_REPO_ID, repoId );
 146                 }
 147                 else if ( ( groupId != null ) && ( artifactId != null ) )
 148                 {
 149                     // TODO: this only works for guest - we could pass in the list of repos
 150                     // new versions of artifact feed request
 151                     processor = wac.getBean( "rssFeedProcessor#new-versions", RssFeedProcessor.class );
 152                     map.put( RssFeedProcessor.KEY_GROUP_ID, groupId );
 153                     map.put( RssFeedProcessor.KEY_ARTIFACT_ID, artifactId );
 154                 }
 155             }
 156             else
 157             {
 158                 res.sendError( HttpServletResponse.SC_UNAUTHORIZED, USER_NOT_AUTHORIZED );
 159                 return;
 160             }
 161
 162             RepositorySession repositorySession = repositorySessionFactory.createSession();
 163             try
 164             {
 165                 feed = processor.process( map, repositorySession.getRepository() );
 166             }
 167             finally
 168             {
 169                 repositorySession.close();
 170             }
 171             if ( feed == null )
 172             {
 173                 res.sendError( HttpServletResponse.SC_NO_CONTENT, "No information available." );
 174                 return;
 175             }
 176
 177             res.setContentType( MIME_TYPE );
 178
 179             if ( repoId != null )
 180             {
 181                 feed.setLink( req.getRequestURL().toString() );
 182             }
 183             else if ( ( groupId != null ) && ( artifactId != null ) )
 184             {
 185                 feed.setLink( req.getRequestURL().toString() );
 186             }
 187
 188             SyndFeedOutput output = new SyndFeedOutput();
 189             output.output( feed, res.getWriter() );
 190         }
 191         catch ( UserNotFoundException unfe )
 192         {
 193             log.debug( COULD_NOT_AUTHENTICATE_USER, unfe );
 194             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
 195         }
 196         catch ( AccountLockedException acce )
 197         {
 198             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
 199         }
 200         catch ( AuthenticationException authe )
 201         {
 202             log.debug( COULD_NOT_AUTHENTICATE_USER, authe );
 203             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
 204         }
 205         catch ( FeedException ex )
 206         {
 207             log.debug( COULD_NOT_GENERATE_FEED_ERROR, ex );
 208             res.sendError( HttpServletResponse.SC_INTERNAL_SERVER_ERROR, COULD_NOT_GENERATE_FEED_ERROR );
 209         }
 210         catch ( MustChangePasswordException e )
 211         {
 212             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
 213         }
 214         catch ( UnauthorizedException e )
 215         {
 216             log.debug( e.getMessage() );
 217             if ( repoId != null )
 218             {
 219                 res.setHeader( "WWW-Authenticate",
 220                                "Basic realm=\"Repository Archiva Managed " + repoId + " Repository" );
 221             }
 222             else
 223             {
 224                 res.setHeader( "WWW-Authenticate", "Basic realm=\"Artifact " + groupId + ":" + artifactId );
 225             }
 226
 227             res.sendError( HttpServletResponse.SC_UNAUTHORIZED, USER_NOT_AUTHORIZED );
 228         }
 229     }
 230
 231     /**
 232      * Basic authentication.
 233      *
 234      * @param req
 235      * @param repositoryId TODO
 236      * @param groupId      TODO
 237      * @param artifactId   TODO
 238      * @return
 239      */
 240     private boolean isAllowed( HttpServletRequest req, String repositoryId, String groupId, String artifactId )
 241         throws UserNotFoundException, AccountLockedException, AuthenticationException, MustChangePasswordException,
 242         UnauthorizedException
 243     {
 244         String auth = req.getHeader( "Authorization" );
 245         List<String> repoIds = new ArrayList<>();
 246
 247         if ( repositoryId != null )
 248         {
 249             repoIds.add( repositoryId );
 250         }
 251         else if ( artifactId != null && groupId != null )
 252         {
 253             if ( auth != null )
 254             {
 255                 if ( !auth.toUpperCase().startsWith( "BASIC " ) )
 256                 {
 257                     return false;
 258                 }
 259
 260                 Decoder dec = new Base64();
 261                 String usernamePassword = "";
 262
 263                 try
 264                 {
 265                     usernamePassword = new String( (byte[]) dec.decode( auth.substring( 6 ).getBytes() ) );
 266                 }
 267                 catch ( DecoderException ie )
 268                 {
 269                     log.warn( "Error decoding username and password: {}", ie.getMessage() );
 270                 }
 271
 272                 if ( usernamePassword == null || usernamePassword.trim().equals( "" ) )
 273                 {
 274                     repoIds = getObservableRepos( UserManager.GUEST_USERNAME );
 275                 }
 276                 else
 277                 {
 278                     String[] userCredentials = usernamePassword.split( ":" );
 279                     repoIds = getObservableRepos( userCredentials[0] );
 280                 }
 281             }
 282             else
 283             {
 284                 repoIds = getObservableRepos( UserManager.GUEST_USERNAME );
 285             }
 286         }
 287         else
 288         {
 289             return false;
 290         }
 291
 292         for ( String repoId : repoIds )
 293         {
 294             try
 295             {
 296                 AuthenticationResult result = httpAuth.getAuthenticationResult( req, null );
 297                 SecuritySession securitySession = httpAuth.getSecuritySession( req.getSession( true ) );
 298
 299                 if ( servletAuth.isAuthenticated( req, result ) && servletAuth.isAuthorized( req, securitySession,
 300                                                                                              repoId,
 301                                                                                              ArchivaRoleConstants.OPERATION_REPOSITORY_ACCESS ) )
 302                 {
 303                     return true;
 304                 }
 305             }
 306             catch ( AuthorizationException e )
 307             {
 308
 309             }
 310             catch ( UnauthorizedException e )
 311             {
 312
 313             }
 314         }
 315
 316         throw new UnauthorizedException( "Access denied." );
 317     }
 318
 319     private List<String> getObservableRepos( String principal )
 320     {
 321         try
 322         {
 323             return userRepositories.getObservableRepositoryIds( principal );
 324         }
 325         catch ( PrincipalNotFoundException e )
 326         {
 327             log.warn( e.getMessage(), e );
 328         }
 329         catch ( AccessDeniedException e )
 330         {
 331             log.warn( e.getMessage(), e );
 332         }
 333         catch ( ArchivaSecurityException e )
 334         {
 335             log.warn( e.getMessage(), e );
 336         }
 337
 338         return Collections.emptyList();
 339     }
 340
 341 }