2 * jFCPlib - FcpConnectionHandler.java - Copyright © 2008 David Roden
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 package net.pterodactylus.fcp;
21 import java.io.IOException;
22 import java.io.InputStream;
23 import java.nio.ByteBuffer;
24 import java.nio.charset.Charset;
25 import java.util.logging.Level;
26 import java.util.logging.Logger;
29 * Handles an FCP connection to a node.
31 * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
33 class FcpConnectionHandler implements Runnable {
36 private static final Logger logger = Logger.getLogger(FcpConnectionHandler.class.getName());
38 /** The underlying connection. */
39 private final FcpConnection fcpConnection;
41 /** The input stream from the node. */
42 private final InputStream remoteInputStream;
44 /** Whether to stop the connection handler. */
45 private boolean shouldStop;
47 /** Whether the next read line feed should be ignored. */
48 private boolean ignoreNextLinefeed;
51 * Creates a new connection handler that operates on the given connection
54 * @param fcpConnection
55 * The underlying FCP connection
56 * @param remoteInputStream
57 * The input stream from the node
59 public FcpConnectionHandler(FcpConnection fcpConnection, InputStream remoteInputStream) {
60 this.fcpConnection = fcpConnection;
61 this.remoteInputStream = remoteInputStream;
69 FcpMessage fcpMessage = null;
70 Throwable throwable = null;
78 String line = readLine();
79 logger.log(Level.FINEST, String.format("read line: %1$s", line));
83 if (line.length() == 0) {
87 if (fcpMessage == null) {
88 fcpMessage = new FcpMessage(line);
91 if ("EndMessage".equalsIgnoreCase(line) || "Data".equalsIgnoreCase(line)) {
92 fcpConnection.handleMessage(fcpMessage);
95 int equalSign = line.indexOf('=');
96 if (equalSign == -1) {
97 /* something's fishy! */
100 String field = line.substring(0, equalSign);
101 String value = line.substring(equalSign + 1);
102 assert fcpMessage != null: "fcp message is null";
103 fcpMessage.setField(field, value);
104 } catch (IOException ioe1) {
109 fcpConnection.handleDisconnect(throwable);
113 * Stops the connection handler.
116 synchronized (this) {
126 * Reads bytes from {@link #remoteInputStream} until ‘\r’ or ‘\n’ are
127 * encountered and decodes the read bytes using UTF-8.
129 * @return The decoded line
130 * @throws IOException
131 * if an I/O error occurs
133 private String readLine() throws IOException {
134 byte[] readBytes = new byte[512];
137 int nextByte = remoteInputStream.read();
138 if (nextByte == -1) {
139 if (readIndex == 0) {
144 if (nextByte == 10) {
145 if (!ignoreNextLinefeed) {
149 ignoreNextLinefeed = false;
150 if (nextByte == 13) {
151 ignoreNextLinefeed = true;
154 if (readIndex == readBytes.length) {
155 /* recopy & enlarge array */
156 byte[] newReadBytes = new byte[readBytes.length * 2];
157 System.arraycopy(readBytes, 0, newReadBytes, 0, readBytes.length);
158 readBytes = newReadBytes;
160 readBytes[readIndex++] = (byte) nextByte;
162 ByteBuffer byteBuffer = ByteBuffer.wrap(readBytes, 0, readIndex);
163 return Charset.forName("UTF-8").decode(byteBuffer).toString();