001package org.apache.maven.wagon.providers.http;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import org.apache.http.HttpEntity;
023import org.apache.http.HttpException;
024import org.apache.http.HttpStatus;
025import org.apache.http.client.methods.CloseableHttpResponse;
026import org.apache.http.client.methods.HttpGet;
027import org.apache.maven.wagon.ResourceDoesNotExistException;
028import org.apache.maven.wagon.TransferFailedException;
029import org.apache.maven.wagon.authorization.AuthorizationException;
030import org.apache.maven.wagon.shared.http.AbstractHttpClientWagon;
031import org.apache.maven.wagon.shared.http.HtmlFileListParser;
032
033import java.io.IOException;
034import java.util.Collections;
035import java.util.List;
036
037/**
038 * @author <a href="michal.maczka@dimatics.com">Michal Maczka</a>
039 */
040public class HttpWagon
041    extends AbstractHttpClientWagon
042{
043
044    public List<String> getFileList( String destinationDirectory )
045        throws AuthorizationException, ResourceDoesNotExistException, TransferFailedException
046    {
047        return getFileList( getInitialBackoffSeconds(), destinationDirectory );
048    }
049
050    private List<String> getFileList( int wait, String destinationDirectory )
051        throws TransferFailedException, ResourceDoesNotExistException, AuthorizationException
052    {
053        if ( destinationDirectory.length() > 0 && !destinationDirectory.endsWith( "/" ) )
054        {
055            destinationDirectory += "/";
056        }
057
058        String url = getRepository().getUrl() + "/" + destinationDirectory;
059
060        HttpGet getMethod = new HttpGet( url );
061
062        try
063        {
064            CloseableHttpResponse response = execute( getMethod );
065            try
066            {
067                int statusCode = response.getStatusLine().getStatusCode();
068
069                fireTransferDebug( url + " - Status code: " + statusCode );
070
071                switch ( statusCode )
072                {
073                    case HttpStatus.SC_OK:
074                        break;
075
076                    case HttpStatus.SC_FORBIDDEN:
077                        throw new AuthorizationException( "Access denied to: " + url );
078
079                    case HttpStatus.SC_UNAUTHORIZED:
080                        throw new AuthorizationException( "Not authorized." );
081
082                    case HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED:
083                        throw new AuthorizationException( "Not authorized by proxy." );
084
085                    case HttpStatus.SC_NOT_FOUND:
086                        throw new ResourceDoesNotExistException( "File: " + url + " does not exist" );
087
088                    case SC_TOO_MANY_REQUESTS:
089                        return getFileList( backoff( wait, url ), destinationDirectory );
090
091                    //add more entries here
092                    default:
093                        throw new TransferFailedException(
094                            "Failed to transfer file: " + url + ". Return code is: " + statusCode );
095                }
096                HttpEntity entity = response.getEntity();
097                if ( entity != null )
098                {
099                    return HtmlFileListParser.parseFileList( url, entity.getContent() );
100                }
101                else
102                {
103                    return Collections.emptyList();
104                }
105
106            }
107            finally
108            {
109                response.close();
110            }
111        }
112        catch ( IOException e )
113        {
114            throw new TransferFailedException( "Could not read response body.", e );
115        }
116        catch ( HttpException e )
117        {
118            throw new TransferFailedException( "Could not read response body.", e );
119        }
120        catch ( InterruptedException e )
121        {
122            throw new TransferFailedException( "Unable to wait for resource.", e );
123        }
124    }
125
126}