package org.apache.maven.wagon.providers.http;

 /*

  * 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.http.HttpException;

 import org.apache.http.HttpResponse;

 import org.apache.http.HttpStatus;

 import org.apache.http.client.methods.HttpGet;

 import org.apache.maven.wagon.ResourceDoesNotExistException;

 import org.apache.maven.wagon.TransferFailedException;

 import org.apache.maven.wagon.authorization.AuthorizationException;

 import org.apache.maven.wagon.shared.http4.AbstractHttpClientWagon;

 import org.apache.maven.wagon.shared.http4.HtmlFileListParser;

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.List;

 /**

  * @author <a href="michal.maczka@dimatics.com">Michal Maczka</a>

  * @version $Id: HttpWagon.java 1208429 2011-11-30 13:54:26Z olamy $

  */

 public class HttpWagon

     extends AbstractHttpClientWagon

 {

     public List<String> getFileList( String destinationDirectory )

         throws TransferFailedException, ResourceDoesNotExistException, AuthorizationException

     {

         if ( destinationDirectory.length() > 0 && !destinationDirectory.endsWith( "/" ) )

         {

             destinationDirectory += "/";

         }

         String url = getRepository().getUrl() + "/" + destinationDirectory;

         HttpGet getMethod = new HttpGet( url );

         try

         {

             HttpResponse response = execute( getMethod );

             int statusCode = response.getStatusLine().getStatusCode();

             fireTransferDebug( url + " - Status code: " + statusCode );

             // TODO [BP]: according to httpclient docs, really should swallow the output on error. verify if that is required

             switch ( statusCode )

             {

                 case HttpStatus.SC_OK:

                     break;

                 case SC_NULL:

                     throw new TransferFailedException( "Failed to transfer file: " );

                 case HttpStatus.SC_FORBIDDEN:

                     throw new AuthorizationException( "Access denied to: " + url );

                 case HttpStatus.SC_UNAUTHORIZED:

                     throw new AuthorizationException( "Not authorized." );

                 case HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED:

                     throw new AuthorizationException( "Not authorized by proxy." );

                 case HttpStatus.SC_NOT_FOUND:

                     throw new ResourceDoesNotExistException( "File: " + url + " does not exist" );

                     //add more entries here

                 default:

                     throw new TransferFailedException(

                         "Failed to transfer file: " + url + ". Return code is: " + statusCode );

             }

             InputStream is = response.getEntity().getContent();

             return HtmlFileListParser.parseFileList( url, is );

         }

         catch ( IOException e )

         {

             throw new TransferFailedException( "Could not read response body.", e );

         }

         catch ( HttpException e )

         {

             throw new TransferFailedException( "Could not read response body.", e );

         }

         finally

         {

             getMethod.abort();

         }

     }

 }