001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.wsclient.connectors;
021    
022    import org.apache.commons.httpclient.HttpException;
023    import org.apache.http.HttpStatus;
024    import org.apache.http.util.EntityUtils;
025    import org.sonar.wsclient.Host;
026    import org.sonar.wsclient.services.Query;
027    import org.apache.http.HttpEntity;
028    import org.apache.http.HttpResponse;
029    import org.apache.http.auth.AuthScope;
030    import org.apache.http.auth.UsernamePasswordCredentials;
031    import org.apache.http.client.methods.HttpGet;
032    import org.apache.http.impl.client.DefaultHttpClient;
033    
034    import java.io.IOException;
035    
036    public class HttpClient4Connector implements Connector {
037    
038      private final Host server;
039    
040      public HttpClient4Connector(Host server) {
041        this.server = server;
042      }
043    
044      public String execute(Query query) {
045        String json = null;
046    
047        DefaultHttpClient client = createClient();
048        HttpGet get = createGetMethod(query);
049    
050        try {
051          HttpResponse response = client.execute(get);
052          HttpEntity entity = response.getEntity();
053          if (entity != null) {
054            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
055              json = EntityUtils.toString(entity);
056    
057            } else if (response.getStatusLine().getStatusCode() != HttpStatus.SC_NOT_FOUND) {
058              throw new ConnectionException("HTTP error: " + response.getStatusLine().getStatusCode() + ", msg: " + response.getStatusLine().getReasonPhrase() + ", query: " + get.toString());
059            }
060          }
061    
062        } catch (HttpException e) {
063          throw new ConnectionException("Query: " + server.getHost() + query.getUrl(), e);
064    
065        } catch (IOException e) {
066          throw new ConnectionException("Query: " + server.getHost() + query.getUrl(), e);
067    
068        } finally {
069          client.getConnectionManager().shutdown();
070        }
071        return json;
072      }
073    
074      private HttpGet createGetMethod(Query query) {
075        HttpGet get = new HttpGet(server.getHost() + query.getUrl());
076        get.setHeader("Accept", "application/json");
077        return get;
078      }
079    
080      private DefaultHttpClient createClient() {
081        DefaultHttpClient client = new DefaultHttpClient();
082        if (server.getUsername() != null) {
083          client.getCredentialsProvider().setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(server.getUsername(), server.getPassword()));
084        }
085        return client;
086      }
087    }