content: /*
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
   ~                                                                               ~
   ~ The MIT License (MIT)                                                         ~
   ~                                                                               ~
   ~ Copyright (c) 2015-2025 miaixz.org and other contributors.                    ~
   ~                                                                               ~
   ~ Permission is hereby granted, free of charge, to any person obtaining a copy  ~
   ~ of this software and associated documentation files (the "Software"), to deal ~
   ~ in the Software without restriction, including without limitation the rights  ~
   ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     ~
   ~ copies of the Software, and to permit persons to whom the Software is         ~
   ~ furnished to do so, subject to the following conditions:                      ~
   ~                                                                               ~
   ~ The above copyright notice and this permission notice shall be included in    ~
   ~ all copies or substantial portions of the Software.                           ~
   ~                                                                               ~
   ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    ~
   ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      ~
   ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   ~
   ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        ~
   ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ~
   ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     ~
   ~ THE SOFTWARE.                                                                 ~
   ~                                                                               ~
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
  */
  package org.miaixz.bus.http.secure;
  
  import java.util.Collections;
  import java.util.LinkedHashMap;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import org.miaixz.bus.core.lang.Charset;
  
  /**
   * RFC 7235兼容的认证
   *
   * @author Kimi Liu
   * @since Java 17+
   */
  public class Challenge {
  
      /**
       * 身份验证方案，如{@code Basic}
       */
      private final String scheme;
      /**
       * 返回验证参数，包括{@code realm}和{@code charset}(如果存在的话)， 但以字符串的形式返回。映射的键是小写的，应该不区分大小写
       */
      private final Map<String, String> authParams;
  
      public Challenge(String scheme, Map<String, String> authParams) {
          if (null == scheme) {
              throw new NullPointerException("scheme == null");
          }
          if (null == authParams) {
              throw new NullPointerException("authParams == null");
          }
          this.scheme = scheme;
          Map<String, String> newAuthParams = new LinkedHashMap<>();
          for (Entry<String, String> authParam : authParams.entrySet()) {
              String key = (null == authParam.getKey()) ? null : authParam.getKey().toLowerCase(Locale.US);
              newAuthParams.put(key, authParam.getValue());
          }
          this.authParams = Collections.unmodifiableMap(newAuthParams);
      }
  
      public Challenge(String scheme, String realm) {
          if (null == scheme) {
              throw new NullPointerException("scheme == null");
          }
          if (null == realm) {
              throw new NullPointerException("realm == null");
          }
          this.scheme = scheme;
          this.authParams = Collections.singletonMap("realm", realm);
      }
  
      /**
       * 该副本需要使用{@code charset}编码的凭据.
       *
       * @param charset 字符集
       * @return 返回此字符集的副本
       */
      public Challenge withCharset(java.nio.charset.Charset charset) {
          if (null == charset) {
              throw new NullPointerException("charset == null");
          }
          Map<String, String> authParams = new LinkedHashMap<>(this.authParams);
          authParams.put("charset", charset.name());
          return new Challenge(scheme, authParams);
      }
  
      /**
       * Returns the authentication scheme, like {@code Basic}.
       */
      public String scheme() {
          return scheme;
      }
  
      /**
       * Returns the auth params, including {@code realm} and {@code charset} if present, but as strings. The map's keys
       * are lowercase and should be treated case-insensitively.
       */
      public Map<String, String> authParams() {
          return authParams;
      }
  
      /**
       * Returns the protection space.
       */
      public String realm() {
          return authParams.get("realm");
      }
  
      /**
       * Returns the charset that should be used to encode the credentials.
       */
      public java.nio.charset.Charset charset() {
          String charset = authParams.get("charset");
          if (null != charset) {
              try {
                  return java.nio.charset.Charset.forName(charset);
              } catch (Exception ignore) {
              }
          }
          return Charset.ISO_8859_1;
      }
  
      @Override
      public boolean equals(Object other) {
          return other instanceof Challenge && ((Challenge) other).scheme.equals(scheme)
                  && ((Challenge) other).authParams.equals(authParams);
      }
  
      @Override
      public int hashCode() {
          int result = 29;
          result = 31 * result + scheme.hashCode();
          result = 31 * result + authParams.hashCode();
          return result;
      }
  
      @Override
      public String toString() {
          return scheme + " authParams=" + authParams;
      }
  
  }
  