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.aliyun.oss.common.auth;
  
  import java.net.MalformedURLException;
  import java.net.URL;
  
  import com.aliyun.oss.common.auth.Credentials;
  import com.aliyuncs.exceptions.ClientException;
  import com.aliyuncs.http.HttpResponse;
  import org.codehaus.jettison.json.JSONException;
  import org.codehaus.jettison.json.JSONObject;
  
  public class InstanceProfileCredentialsFetcher extends HttpCredentialsFetcher {
  
      public InstanceProfileCredentialsFetcher() {
      }
  
      public void setRoleName(String roleName) {
          if (null == roleName || roleName.isEmpty()) {
              throw new IllegalArgumentException("You must specifiy a valid role name.");
          }
          this.roleName = roleName;
      }
  
      public InstanceProfileCredentialsFetcher withRoleName(String roleName) {
          setRoleName(roleName);
          return this;
      }
  
      @Override
      public URL buildUrl() throws ClientException {
          try {
              return new URL("http://" + metadataServiceHost + URL_IN_ECS_METADATA + roleName);
          } catch (MalformedURLException e) {
              throw new IllegalArgumentException(e.toString());
          }
      }
  
      @Override
      public Credentials parse(HttpResponse response) throws ClientException {
          String jsonContent = new String(response.getHttpContent());
  
          try {
              JSONObject obj = new JSONObject(jsonContent);
  
              if (obj.has("Code") && obj.has("AccessKeyId") && obj.has("AccessKeySecret") && obj.has("SecurityToken")
                      && obj.has("Expiration")) {
              } else {
                  throw new ClientException("Invalid json got from ECS Metadata service.");
              }
  
              if (!"Success".equals(obj.getString("Code"))) {
                  throw new ClientException("Failed to get RAM session credentials from ECS metadata service.");
              }
  
              return new InstanceProfileCredentials(obj.getString("AccessKeyId"), obj.getString("AccessKeySecret"),
                      obj.getString("SecurityToken"), obj.getString("Expiration"));
          } catch (JSONException e) {
              throw new ClientException("InstanceProfileCredentialsFetcher.parse [" + jsonContent + "] exception:" + e);
          }
      }
  
      private static final String URL_IN_ECS_METADATA = "/latest/meta-data/ram/security-credentials/";
      private static final String metadataServiceHost = "100.100.100.200";
  
      private String roleName;
  
  }
  