content: /*
   * Copyright 1999-2018 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
   *
   *      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.nacos.common.util;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.lang3.StringUtils;
  
  import java.io.*;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.zip.GZIPInputStream;
  
  /**
   * IO related tool methods
   *
   * @author nacos
   */
  public class IoUtils {
  
      public static byte[] tryDecompress(InputStream raw) throws Exception {
          GZIPInputStream gis = null;
          ByteArrayOutputStream out = null;
          try {
              gis = new GZIPInputStream(raw);
              out = new ByteArrayOutputStream();
              IOUtils.copy(gis, out);
              return out.toByteArray();
          } catch (Exception e) {
              e.printStackTrace();
          } finally {
              if (out != null) {
                  out.close();
              }
              if (gis != null) {
                  gis.close();
              }
          }
  
          return null;
      }
  
      static private BufferedReader toBufferedReader(Reader reader) {
          return reader instanceof BufferedReader ? (BufferedReader) reader : new BufferedReader(
              reader);
      }
  
      public static void writeStringToFile(File file, String data, String encoding)
          throws IOException {
          OutputStream os = null;
          try {
              os = new FileOutputStream(file);
              os.write(data.getBytes(encoding));
              os.flush();
          } finally {
              if (null != os) {
                  os.close();
              }
          }
      }
  
      static public List<String> readLines(Reader input) throws IOException {
          BufferedReader reader = toBufferedReader(input);
          List<String> list = new ArrayList<String>();
          String line = null;
          for (; ; ) {
              line = reader.readLine();
              if (null != line) {
                  if (StringUtils.isNotEmpty(line)) {
                      list.add(line.trim());
                  }
              } else {
                  break;
              }
          }
          return list;
      }
  
  }
  
  