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 com.alibaba.cloudapp.oauth2.verifier;
  
  import com.alibaba.fastjson2.JSONObject;
  import com.alibaba.cloudapp.api.oauth2.verifier.TokenVerifier;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.http.HttpHeaders;
  import org.springframework.http.RequestEntity;
  import org.springframework.http.ResponseEntity;
  import org.springframework.web.client.RestTemplate;
  
  import java.net.URI;
  
  /**
   * Use OAuth server introspection endpoint to verify token
   */
  public class IntrospectionTokenVerifier implements TokenVerifier {
      
      private static final Logger logger = LoggerFactory.getLogger(
              IntrospectionTokenVerifier.class);
      
      private final URI introspectionUri;
      private final RestTemplate restTemplate;
      
      public IntrospectionTokenVerifier(URI introspectionUri, RestTemplate restTemplate) {
          this.introspectionUri = introspectionUri;
          this.restTemplate = restTemplate;
      }
      
      public IntrospectionTokenVerifier(URI introspectionUri) {
          this(introspectionUri, new RestTemplate());
      }
      
      @Override
      public boolean verify(String token) {
          RequestEntity<String> request = RequestEntity.post(introspectionUri)
                  .header(HttpHeaders.AUTHORIZATION, token)
                  .body("");
          
          ResponseEntity<String> response = restTemplate.exchange(request, String.class);
          
          if (logger.isDebugEnabled()) {
              logger.debug("verify token response: {}", response);
          }
          
          if (response.getStatusCode().is2xxSuccessful()) {
              JSONObject object = JSONObject.parseObject(response.getBody());
              
              return object != null && object.getBoolean("active");
          }
          return false;
      }
      
  }
  