content: /*
   * 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.
   */
  
  package org.apache.ambari.server.utils;
  
  import java.net.MalformedURLException;
  import java.net.URL;
  
  import org.apache.commons.lang3.StringUtils;
  
  /**
   * Provides functionality for hiding credentials in URLs.
   */
  public class URLCredentialsHider {
    public static final String INVALID_URL = "invalid_url";
    public static final String HIDDEN_USER = "****";
    public static final String HIDDEN_CREDENTIALS = HIDDEN_USER + ":" + HIDDEN_USER;
  
    public static String hideCredentials(String urlString) {
      if (StringUtils.isEmpty(urlString)) {
        return urlString;
      }
      URL url;
      try {
        url = new URL(urlString);
      } catch (MalformedURLException e) {
        // it is better to miss url instead of spreading it out
        return INVALID_URL;
      }
      String userInfo = url.getUserInfo();
      if (StringUtils.isNotEmpty(userInfo)) {
        if (userInfo.contains(":")) {
          return StringUtils.replaceOnce(urlString, userInfo, HIDDEN_CREDENTIALS);
        } else {
          return StringUtils.replaceOnce(urlString, userInfo, HIDDEN_USER);
        }
      }
      return urlString;
    }
  }
  