001/*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2008-2012 SonarSource
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 */
020package org.sonar.batch;
021
022import org.apache.commons.lang.StringUtils;
023import org.codehaus.plexus.util.IOUtil;
024import org.sonar.api.BatchComponent;
025import org.sonar.api.platform.Server;
026
027import java.io.IOException;
028import java.io.InputStream;
029import java.net.HttpURLConnection;
030import java.net.URL;
031
032public class RemoteServerMetadata implements BatchComponent {
033
034  public static final int CONNECT_TIMEOUT_MILLISECONDS = 30000;
035  public static final int READ_TIMEOUT_MILLISECONDS = 60000;
036
037  private String serverUrl;
038
039  public RemoteServerMetadata(Server server) {
040    serverUrl = server.getURL();
041    if (serverUrl.endsWith("/")) {
042      serverUrl = StringUtils.chop(serverUrl);
043    }
044  }
045
046  public String getServerId() throws IOException {
047    String remoteServerInfo = remoteContent("/api/server");
048    // don't use JSON utilities to extract ID from such a small string
049    return extractId(remoteServerInfo);
050  }
051
052  protected String extractId(String remoteServerInfo) {
053    String partialId = StringUtils.substringAfter(remoteServerInfo, "\"id\":\"");
054    return StringUtils.substringBefore(partialId, "\"");
055  }
056
057  protected String getUrlFor(String path) {
058    return serverUrl + path;
059  }
060
061  protected String remoteContent(String path) throws IOException {
062    String fullUrl = getUrlFor(path);
063    HttpURLConnection conn = getConnection(fullUrl, "GET");
064    InputStream input = (InputStream) conn.getContent();
065    try {
066      int statusCode = conn.getResponseCode();
067      if (statusCode != HttpURLConnection.HTTP_OK) {
068        throw new IOException("Status returned by url : '" + fullUrl + "' is invalid : " + statusCode);
069      }
070      return IOUtil.toString(input);
071
072    } finally {
073      IOUtil.close(input);
074      conn.disconnect();
075    }
076  }
077
078  static HttpURLConnection getConnection(String url, String method) throws IOException {
079    URL page = new URL(url);
080    HttpURLConnection conn = (HttpURLConnection) page.openConnection();
081    conn.setConnectTimeout(CONNECT_TIMEOUT_MILLISECONDS);
082    conn.setReadTimeout(READ_TIMEOUT_MILLISECONDS);
083    conn.setRequestMethod(method);
084    conn.connect();
085    return conn;
086  }
087
088}