content: /*
   * Copyright 1999-2019 Alibaba Group Holding Ltd.
   *
   * Licensed 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
   *
   *      https://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 com.alibaba.csp.sentinel.adapter.gateway.sc;
  
  import java.net.InetSocketAddress;
  import java.util.Optional;
  
  import com.alibaba.csp.sentinel.adapter.gateway.common.param.RequestItemParser;
  
  import org.springframework.http.HttpCookie;
  import org.springframework.web.server.ServerWebExchange;
  
  /**
   * @author Eric Zhao
   * @since 1.6.0
   */
  public class ServerWebExchangeItemParser implements RequestItemParser<ServerWebExchange> {
  
      @Override
      public String getPath(ServerWebExchange exchange) {
          return exchange.getRequest().getPath().value();
      }
  
      @Override
      public String getRemoteAddress(ServerWebExchange exchange) {
          InetSocketAddress remoteAddress = exchange.getRequest().getRemoteAddress();
          if (remoteAddress == null) {
              return null;
          }
          return remoteAddress.getAddress().getHostAddress();
      }
  
      @Override
      public String getHeader(ServerWebExchange exchange, String key) {
          return exchange.getRequest().getHeaders().getFirst(key);
      }
  
      @Override
      public String getUrlParam(ServerWebExchange exchange, String paramName) {
          return exchange.getRequest().getQueryParams().getFirst(paramName);
      }
  
      @Override
      public String getCookieValue(ServerWebExchange exchange, String cookieName) {
          return Optional.ofNullable(exchange.getRequest().getCookies().getFirst(cookieName))
              .map(HttpCookie::getValue)
              .orElse(null);
      }
  }
  