code: /* LanguageTool, a natural language style checker 
   * Copyright (C) 2014 Daniel Naber (http://www.danielnaber.de)
   * 
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  package org.languagetool.rules.patterns;
  
  import org.jetbrains.annotations.Nullable;
  import org.languagetool.tools.StringTools;
  
  import java.net.Authenticator;
  import java.net.PasswordAuthentication;
  
  /**
   * Authenticator that extracts username and password from URL, e.g.
   * from {@code http://user:password@myhost.org/path}
   * @since 2.7
   */
  public class PasswordAuthenticator extends Authenticator {
  
    @Override
    @Nullable
    protected PasswordAuthentication getPasswordAuthentication() {
      if (getRequestingURL() == null) {
        return null;
      }
      String userInfo = getRequestingURL().getUserInfo();
      if (StringTools.isEmpty(userInfo)) {
        return null;
      }
      String[] parts = userInfo.split(":");
      if (parts.length != 2) {
        throw new RuntimeException("Invalid userInfo format, expected 'user:password': " + userInfo);
      }
      String username = parts[0];
      String password = parts[1];
      return new PasswordAuthentication(username, password.toCharArray());
    }
  
  }
  