package org.apache.maven.index.updater;
/*
* 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 org.apache.maven.wagon.ConnectionException;
import org.apache.maven.wagon.ResourceDoesNotExistException;
import org.apache.maven.wagon.Wagon;
import org.apache.maven.wagon.WagonException;
import org.apache.maven.wagon.authentication.AuthenticationException;
import org.apache.maven.wagon.authentication.AuthenticationInfo;
import org.apache.maven.wagon.authorization.AuthorizationException;
import org.apache.maven.wagon.events.TransferListener;
import org.apache.maven.wagon.proxy.ProxyInfo;
import org.apache.maven.wagon.repository.Repository;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
/**
* This is a helper for obtaining Wagon based ResourceFetchers. Some Indexer integrations does have access to Wagon
* already, so this is here just to help them. Since Wagon (et al) is just optional dependency, looking up this
* component in integrations where Wagon is not present, should be avoided. This helper is rather limited, as it offers
* only "HTTP" wagons! This is not made a Plexus component since SISU would crack in CLI, while trying to load up this
* class, because of lacking Wagon classes from classpath!
*
* @author cstamas
*/
public class WagonHelper
{
private final PlexusContainer plexusContainer;
public WagonHelper( final PlexusContainer plexusContainer )
{
this.plexusContainer = plexusContainer;
}
public WagonFetcher getWagonResourceFetcher( final TransferListener listener )
throws ComponentLookupException
{
return getWagonResourceFetcher( listener, null, null );
}
/**
* @param listener
* @param authenticationInfo
* @param proxyInfo
* @return
* @throws ComponentLookupException
* @deprecated use getWagonResourceFetcher with protocol argument
*/
public WagonFetcher getWagonResourceFetcher( final TransferListener listener,
final AuthenticationInfo authenticationInfo,
final ProxyInfo proxyInfo )
throws ComponentLookupException
{
// we limit ourselves to HTTP only
return new WagonFetcher( plexusContainer.lookup( Wagon.class, "http" ), listener, authenticationInfo,
proxyInfo );
}
/**
* @param listener
* @param authenticationInfo
* @param proxyInfo
* @param protocol protocol supported by wagon http/https
* @return
* @throws ComponentLookupException
* @since 4.1.3
*/
public WagonFetcher getWagonResourceFetcher( final TransferListener listener,
final AuthenticationInfo authenticationInfo, final ProxyInfo proxyInfo,
String protocol )
throws ComponentLookupException
{
return new WagonFetcher( plexusContainer.lookup( Wagon.class, protocol ), listener, authenticationInfo,
proxyInfo );
}
public static class WagonFetcher
implements ResourceFetcher
{
private final TransferListener listener;
private final AuthenticationInfo authenticationInfo;
private final ProxyInfo proxyInfo;
private final Wagon wagon;
public WagonFetcher( final Wagon wagon, final TransferListener listener,
final AuthenticationInfo authenticationInfo, final ProxyInfo proxyInfo )
{
this.wagon = wagon;
this.listener = listener;
this.authenticationInfo = authenticationInfo;
this.proxyInfo = proxyInfo;
}
public void connect( final String id, final String url )
throws IOException
{
Repository repository = new Repository( id, url );
try
{
// wagon = wagonManager.getWagon( repository );
if ( listener != null )
{
wagon.addTransferListener( listener );
}
// when working in the context of Maven, the WagonManager is already
// populated with proxy information from the Maven environment
if ( authenticationInfo != null )
{
if ( proxyInfo != null )
{
wagon.connect( repository, authenticationInfo, proxyInfo );
}
else
{
wagon.connect( repository, authenticationInfo );
}
}
else
{
if ( proxyInfo != null )
{
wagon.connect( repository, proxyInfo );
}
else
{
wagon.connect( repository );
}
}
}
catch ( AuthenticationException ex )
{
String msg = "Authentication exception connecting to " + repository;
logError( msg, ex );
IOException ioException = new IOException( msg );
ioException.initCause( ex );
throw ioException;
}
catch ( WagonException ex )
{
String msg = "Wagon exception connecting to " + repository;
logError( msg, ex );
IOException ioException = new IOException( msg );
ioException.initCause( ex );
throw ioException;
}
}
public void disconnect()
throws IOException
{
if ( wagon != null )
{
try
{
wagon.disconnect();
}
catch ( ConnectionException ex )
{
IOException ioe = new IOException( ex.toString() );
ioe.initCause( ex );
throw ioe;
}
}
}
public InputStream retrieve( String name )
throws IOException, FileNotFoundException
{
final File target = File.createTempFile( name, "" );
target.deleteOnExit();
retrieve( name, target );
return new FileInputStream( target )
{
@Override
public void close()
throws IOException
{
super.close();
target.delete();
}
};
}
public void retrieve( final String name, final File targetFile )
throws IOException, FileNotFoundException
{
try
{
wagon.get( name, targetFile );
}
catch ( AuthorizationException e )
{
targetFile.delete();
String msg = "Authorization exception retrieving " + name;
logError( msg, e );
IOException ioException = new IOException( msg );
ioException.initCause( e );
throw ioException;
}
catch ( ResourceDoesNotExistException e )
{
targetFile.delete();
String msg = "Resource " + name + " does not exist";
logError( msg, e );
FileNotFoundException fileNotFoundException = new FileNotFoundException( msg );
fileNotFoundException.initCause( e );
throw fileNotFoundException;
}
catch ( WagonException e )
{
targetFile.delete();
String msg = "Transfer for " + name + " failed";
logError( msg, e );
IOException ioException = new IOException( msg + "; " + e.getMessage() );
ioException.initCause( e );
throw ioException;
}
}
private void logError( final String msg, final Exception ex )
{
if ( listener != null )
{
listener.debug( msg + "; " + ex.getMessage() );
}
}
}
}