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.internal;
  
  import static com.aliyun.oss.internal.OSSUtils.safeCloseResponse;
  import org.apache.http.HttpStatus;
  
  import com.aliyun.oss.ClientException;
  import com.aliyun.oss.OSSErrorCode;
  import com.aliyun.oss.OSSException;
  import com.aliyun.oss.common.comm.ResponseHandler;
  import com.aliyun.oss.common.comm.ResponseMessage;
  import com.aliyun.oss.common.parser.ResponseParseException;
  import com.aliyun.oss.common.utils.ExceptionFactory;
  import com.aliyun.oss.internal.ResponseParsers.ErrorResponseParser;
  import com.aliyun.oss.internal.model.OSSErrorResult;
  import com.aliyun.oss.common.utils.BinaryUtil;
  
  import java.io.ByteArrayInputStream;
  
  
  /**
   * Used to handle error response from oss, when HTTP status code is not 2xx,
   * then throws <code>OSSException</code> with detailed error information(such as
   * request id, error code).
   */
  public class OSSErrorResponseHandler implements ResponseHandler {
      private static ErrorResponseParser errorResponseParser = new ErrorResponseParser();
  
      public void handle(ResponseMessage response) throws OSSException, ClientException {
  
          if (response.isSuccessful()) {
              return;
          }
  
          String requestId = response.getRequestId();
          int statusCode = response.getStatusCode();
          if (response.getContent() == null) {
              //try to get error from x-oss-err header
              OSSErrorResult result = null;
              try {
                  if (response.getHeaders().containsKey(OSSHeaders.OSS_ERROR)) {
                      byte[] data = BinaryUtil.fromBase64String(response.getHeaders().get(OSSHeaders.OSS_ERROR));
                      result = errorResponseParser.parseErrorResponse(new ByteArrayInputStream(data));
                      if (result.Code == null) {
                          result = null;
                      }
                  }
              }catch (Throwable e) {
                  //ignore error
              }
  
              /**
               * When HTTP response body is null, handle status code 404 Not
               * Found, 304 Not Modified, 412 Precondition Failed especially.
               */
              if (result != null) {
                  throw ExceptionFactory.createOSSException(result, null);
              } else if (statusCode == HttpStatus.SC_NOT_FOUND) {
                  throw ExceptionFactory.createOSSException(requestId, OSSErrorCode.NO_SUCH_KEY, "Not Found");
              } else if (statusCode == HttpStatus.SC_NOT_MODIFIED) {
                  throw ExceptionFactory.createOSSException(requestId, OSSErrorCode.NOT_MODIFIED, "Not Modified");
              } else if (statusCode == HttpStatus.SC_PRECONDITION_FAILED) {
                  throw ExceptionFactory.createOSSException(requestId, OSSErrorCode.PRECONDITION_FAILED,
                          "Precondition Failed");
              } else if (statusCode == HttpStatus.SC_FORBIDDEN) {
                  throw ExceptionFactory.createOSSException(requestId, OSSErrorCode.ACCESS_FORBIDDEN, "AccessForbidden");
              } else {
                  throw ExceptionFactory.createUnknownOSSException(requestId, statusCode);
              }
          }
  
          try {
              OSSErrorResult errorResult = errorResponseParser.parse(response);
              throw ExceptionFactory.createOSSException(errorResult, response.getErrorResponseAsString());
          } catch (ResponseParseException e) {
              throw ExceptionFactory.createInvalidResponseException(requestId, response.getErrorResponseAsString(), e);
          } finally {
              safeCloseResponse(response);
          }
      }
  
  }
  