void setConfig(Configuration config) {
   log.debug("config: " + config);
   proxyHost = config.get(PARAM_PROXY_HOST);
   proxyPort = config.getInt(PARAM_PROXY_PORT, DEFAULT_PROXY_PORT);
   if (StringUtil.isNullString(proxyHost) || proxyPort <= 0) {
     String http_proxy = System.getenv("http_proxy");
     if (!StringUtil.isNullString(http_proxy)) {
       try {
         HostPortParser hpp = new HostPortParser(http_proxy);
         proxyHost = hpp.getHost();
         proxyPort = hpp.getPort();
       } catch (HostPortParser.InvalidSpec e) {
         log.warning("Can't parse http_proxy environment var, ignoring: " + http_proxy + ": " + e);
       }
     }
   }
   if (StringUtil.isNullString(proxyHost) || proxyPort <= 0) {
     proxyHost = null;
   } else {
     log.info("Proxying through " + proxyHost + ":" + proxyPort);
   }
   userAgent = config.get(PARAM_USER_AGENT);
   if (StringUtil.isNullString(userAgent)) {
     userAgent = null;
   } else {
     log.debug("Setting User-Agent to " + userAgent);
   }
 }
 Configuration natureAuConfig() {
   Configuration conf = ConfigManager.newConfiguration();
   conf.put("base_url", BASE_URL);
   conf.put("journal_id", "aps");
   conf.put("volume_name", "123");
   conf.put("year", "2008");
   return conf;
 }
 Configuration simAuConfig(String rootPath) {
   Configuration conf = ConfigManager.newConfiguration();
   conf.put("root", rootPath);
   conf.put("base_url", BASE_URL);
   conf.put("depth", "1");
   conf.put("branch", "4");
   conf.put("numFiles", "7");
   conf.put(
       "fileTypes",
       "" + (SimulatedContentGenerator.FILE_TYPE_HTML | SimulatedContentGenerator.FILE_TYPE_PDF));
   conf.put("binFileSize", "" + fileSize);
   return conf;
 }