| /* |
| * 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.netbeans.modules.docker; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.ByteBuffer; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * |
| * @author Petr Hejl |
| */ |
| //@NotThreadSafe |
| public class Demuxer implements StreamItem.Fetcher { |
| |
| private static final Logger LOGGER = Logger.getLogger(Demuxer.class.getName()); |
| |
| private final InputStream is; |
| |
| private byte[] buffer = new byte[8]; |
| |
| private byte[] content = new byte[256]; |
| |
| public Demuxer(InputStream is) { |
| this.is = is; |
| } |
| |
| @Override |
| public StreamItem fetch() { |
| try { |
| int sum = 0; |
| do { |
| int read = is.read(buffer, sum, buffer.length - sum); |
| if (read < 0) { |
| return null; |
| } |
| sum += read; |
| } while (sum < 8); |
| // now we have 8 bytes |
| assert buffer.length == 8; |
| |
| boolean error; |
| int size = ByteBuffer.wrap(buffer).getInt(4); |
| if (buffer[0] == 0 || buffer[0] == 1) { |
| error = false; |
| } else if (buffer[0] == 2) { |
| error = true; |
| } else { |
| throw new IOException("Unparsable stream " + buffer[0]); |
| } |
| |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(size); |
| sum = 0; |
| do { |
| int read = is.read(content, 0, Math.min(size - sum, content.length)); |
| if (read < 0) { |
| return null; |
| } |
| bos.write(content, 0, read); |
| sum += read; |
| } while (sum < size); |
| return new StreamItem(ByteBuffer.wrap(bos.toByteArray()), error); |
| } catch (IOException ex) { |
| LOGGER.log(Level.INFO, null, ex); |
| return null; |
| } |
| } |
| } |