package org.apache.archiva.web.rss;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.io.FeedException;
import com.sun.syndication.io.SyndFeedOutput;
import org.apache.archiva.metadata.repository.RepositorySession;
import org.apache.archiva.metadata.repository.RepositorySessionFactory;
import org.apache.archiva.rss.processor.RssFeedProcessor;
import org.apache.archiva.security.common.ArchivaRoleConstants;
import org.apache.commons.codec.Decoder;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.StringUtils;
import org.apache.archiva.security.AccessDeniedException;
import org.apache.archiva.security.ArchivaSecurityException;
import org.apache.archiva.security.PrincipalNotFoundException;
import org.apache.archiva.security.ServletAuthenticator;
import org.apache.archiva.security.UserRepositories;
import org.codehaus.plexus.redback.authentication.AuthenticationException;
import org.codehaus.plexus.redback.authentication.AuthenticationResult;
import org.codehaus.plexus.redback.authorization.AuthorizationException;
import org.codehaus.plexus.redback.authorization.UnauthorizedException;
import org.codehaus.plexus.redback.policy.AccountLockedException;
import org.codehaus.plexus.redback.policy.MustChangePasswordException;
import org.codehaus.plexus.redback.system.SecuritySession;
import org.codehaus.plexus.redback.users.UserManager;
import org.codehaus.plexus.redback.users.UserNotFoundException;
import org.codehaus.redback.integration.filter.authentication.HttpAuthenticator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Servlet for handling rss feed requests.
*/
public class RssFeedServlet
extends HttpServlet
{
public static final String MIME_TYPE = "application/rss+xml; charset=UTF-8";
private static final String COULD_NOT_GENERATE_FEED_ERROR = "Could not generate feed";
private static final String COULD_NOT_AUTHENTICATE_USER = "Could not authenticate user";
private static final String USER_NOT_AUTHORIZED = "User not authorized to access feed.";
private Logger log = LoggerFactory.getLogger( RssFeedServlet.class );
private RssFeedProcessor processor;
private WebApplicationContext wac;
private UserRepositories userRepositories;
private ServletAuthenticator servletAuth;
private HttpAuthenticator httpAuth;
private RepositorySessionFactory repositorySessionFactory;
public void init( javax.servlet.ServletConfig servletConfig )
throws ServletException
{
super.init( servletConfig );
wac = WebApplicationContextUtils.getRequiredWebApplicationContext( servletConfig.getServletContext() );
userRepositories = wac.getBean( UserRepositories.class );
servletAuth = wac.getBean( ServletAuthenticator.class );
httpAuth = wac.getBean( "httpAuthenticator#basic", HttpAuthenticator.class );
// TODO: what if there are other types?
repositorySessionFactory = wac.getBean( "repositorySessionFactory", RepositorySessionFactory.class );
}
public void doGet( HttpServletRequest req, HttpServletResponse res )
throws ServletException, IOException
{
String repoId = null;
String groupId = null;
String artifactId = null;
String url = StringUtils.removeEnd( req.getRequestURL().toString(), "/" );
if ( StringUtils.countMatches( StringUtils.substringAfter( url, "feeds/" ), "/" ) > 0 )
{
artifactId = StringUtils.substringAfterLast( url, "/" );
groupId = StringUtils.substringBeforeLast( StringUtils.substringAfter( url, "feeds/" ), "/" );
groupId = StringUtils.replaceChars( groupId, '/', '.' );
}
else if ( StringUtils.countMatches( StringUtils.substringAfter( url, "feeds/" ), "/" ) == 0 )
{
repoId = StringUtils.substringAfterLast( url, "/" );
}
else
{
res.sendError( HttpServletResponse.SC_BAD_REQUEST, "Invalid request url." );
return;
}
try
{
Map<String, String> map = new HashMap<String, String>();
SyndFeed feed = null;
if ( isAllowed( req, repoId, groupId, artifactId ) )
{
if ( repoId != null )
{
// new artifacts in repo feed request
processor = wac.getBean( "rssFeedProcessor#new-artifacts", RssFeedProcessor.class );
map.put( RssFeedProcessor.KEY_REPO_ID, repoId );
}
else if ( ( groupId != null ) && ( artifactId != null ) )
{
// TODO: this only works for guest - we could pass in the list of repos
// new versions of artifact feed request
processor = wac.getBean( "rssFeedProcessor#new-versions", RssFeedProcessor.class );
map.put( RssFeedProcessor.KEY_GROUP_ID, groupId );
map.put( RssFeedProcessor.KEY_ARTIFACT_ID, artifactId );
}
}
else
{
res.sendError( HttpServletResponse.SC_UNAUTHORIZED, USER_NOT_AUTHORIZED );
return;
}
RepositorySession repositorySession = repositorySessionFactory.createSession();
try
{
feed = processor.process( map, repositorySession.getRepository() );
}
finally
{
repositorySession.close();
}
if ( feed == null )
{
res.sendError( HttpServletResponse.SC_NO_CONTENT, "No information available." );
return;
}
res.setContentType( MIME_TYPE );
if ( repoId != null )
{
feed.setLink( req.getRequestURL().toString() );
}
else if ( ( groupId != null ) && ( artifactId != null ) )
{
feed.setLink( req.getRequestURL().toString() );
}
SyndFeedOutput output = new SyndFeedOutput();
output.output( feed, res.getWriter() );
}
catch ( UserNotFoundException unfe )
{
log.debug( COULD_NOT_AUTHENTICATE_USER, unfe );
res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
}
catch ( AccountLockedException acce )
{
res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
}
catch ( AuthenticationException authe )
{
log.debug( COULD_NOT_AUTHENTICATE_USER, authe );
res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
}
catch ( FeedException ex )
{
log.debug( COULD_NOT_GENERATE_FEED_ERROR, ex );
res.sendError( HttpServletResponse.SC_INTERNAL_SERVER_ERROR, COULD_NOT_GENERATE_FEED_ERROR );
}
catch ( MustChangePasswordException e )
{
res.sendError( HttpServletResponse.SC_UNAUTHORIZED, COULD_NOT_AUTHENTICATE_USER );
}
catch ( UnauthorizedException e )
{
log.debug( e.getMessage() );
if ( repoId != null )
{
res.setHeader( "WWW-Authenticate",
"Basic realm=\"Repository Archiva Managed " + repoId + " Repository" );
}
else
{
res.setHeader( "WWW-Authenticate", "Basic realm=\"Artifact " + groupId + ":" + artifactId );
}
res.sendError( HttpServletResponse.SC_UNAUTHORIZED, USER_NOT_AUTHORIZED );
}
}
/**
* Basic authentication.
*
* @param req
* @param repositoryId TODO
* @param groupId TODO
* @param artifactId TODO
* @return
*/
private boolean isAllowed( HttpServletRequest req, String repositoryId, String groupId, String artifactId )
throws UserNotFoundException, AccountLockedException, AuthenticationException, MustChangePasswordException,
UnauthorizedException
{
String auth = req.getHeader( "Authorization" );
List<String> repoIds = new ArrayList<String>();
if ( repositoryId != null )
{
repoIds.add( repositoryId );
}
else if ( artifactId != null && groupId != null )
{
if ( auth != null )
{
if ( !auth.toUpperCase().startsWith( "BASIC " ) )
{
return false;
}
Decoder dec = new Base64();
String usernamePassword = "";
try
{
usernamePassword = new String( (byte[]) dec.decode( auth.substring( 6 ).getBytes() ) );
}
catch ( DecoderException ie )
{
log.warn( "Error decoding username and password.", ie.getMessage() );
}
if ( usernamePassword == null || usernamePassword.trim().equals( "" ) )
{
repoIds = getObservableRepos( UserManager.GUEST_USERNAME );
}
else
{
String[] userCredentials = usernamePassword.split( ":" );
repoIds = getObservableRepos( userCredentials[0] );
}
}
else
{
repoIds = getObservableRepos( UserManager.GUEST_USERNAME );
}
}
else
{
return false;
}
for ( String repoId : repoIds )
{
try
{
AuthenticationResult result = httpAuth.getAuthenticationResult( req, null );
SecuritySession securitySession = httpAuth.getSecuritySession( req.getSession( true ) );
if ( servletAuth.isAuthenticated( req, result ) && servletAuth.isAuthorized( req, securitySession,
repoId,
ArchivaRoleConstants.OPERATION_REPOSITORY_ACCESS ) )
{
return true;
}
}
catch ( AuthorizationException e )
{
}
catch ( UnauthorizedException e )
{
}
}
throw new UnauthorizedException( "Access denied." );
}
private List<String> getObservableRepos( String principal )
{
try
{
return userRepositories.getObservableRepositoryIds( principal );
}
catch ( PrincipalNotFoundException e )
{
log.warn( e.getMessage(), e );
}
catch ( AccessDeniedException e )
{
log.warn( e.getMessage(), e );
}
catch ( ArchivaSecurityException e )
{
log.warn( e.getMessage(), e );
}
return Collections.emptyList();
}
}