| /* |
| * 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 org.apache.hadoop.ozone.s3.util; |
| |
| import java.util.regex.Matcher; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| import static org.apache.hadoop.ozone.s3.util.S3Consts.RANGE_HEADER_MATCH_PATTERN; |
| /** |
| * Utility class for S3. |
| */ |
| @InterfaceAudience.Private |
| public final class RangeHeaderParserUtil { |
| |
| private RangeHeaderParserUtil() { |
| } |
| |
| /** |
| * Parse the rangeHeader and set the start and end offset. |
| * @param rangeHeaderVal |
| * @param length |
| * |
| * @return RangeHeader |
| */ |
| public static RangeHeader parseRangeHeader(String rangeHeaderVal, long |
| length) { |
| long start = 0; |
| long end = 0; |
| boolean noStart = false; |
| boolean readFull = false; |
| boolean inValidRange = false; |
| RangeHeader rangeHeader; |
| Matcher matcher = RANGE_HEADER_MATCH_PATTERN.matcher(rangeHeaderVal); |
| if (matcher.matches()) { |
| if (!matcher.group("start").equals("")) { |
| start = Integer.parseInt(matcher.group("start")); |
| } else { |
| noStart = true; |
| } |
| if (!matcher.group("end").equals("")) { |
| end = Integer.parseInt(matcher.group("end")); |
| } else { |
| end = length - 1; |
| } |
| if (noStart) { |
| if (end < length) { |
| start = length - end; |
| } else { |
| start = 0; |
| } |
| end = length - 1; |
| } else { |
| if (start >= length) { |
| readFull = true; |
| if (end >= length) { |
| inValidRange = true; |
| } else { |
| start = 0; |
| end = length - 1; |
| } |
| } else { |
| if (end >= length) { |
| end = length - 1; |
| } |
| } |
| } |
| } else { |
| // Byte specification is not matching or start and endoffset provided |
| // are not matching with regex. |
| start = 0; |
| end = length - 1; |
| readFull = true; |
| } |
| rangeHeader = new RangeHeader(start, end, readFull, inValidRange); |
| return rangeHeader; |
| |
| } |
| } |