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.EOFException;
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.nio.ByteBuffer;
25 import java.nio.charset.Charset;
26 import java.util.logging.Level;
27 import java.util.logging.Logger;
30 * Handles an FCP connection to a node.
32 * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
34 class FcpConnectionHandler implements Runnable {
37 private static final Logger logger = Logger.getLogger(FcpConnectionHandler.class.getName());
39 /** The underlying connection. */
40 private final FcpConnection fcpConnection;
42 /** The input stream from the node. */
43 private final InputStream remoteInputStream;
45 /** Whether to stop the connection handler. */
46 private boolean shouldStop;
48 /** Whether the next read line feed should be ignored. */
49 private boolean ignoreNextLinefeed;
52 * Creates a new connection handler that operates on the given connection
55 * @param fcpConnection
56 * The underlying FCP connection
57 * @param remoteInputStream
58 * The input stream from the node
60 public FcpConnectionHandler(FcpConnection fcpConnection, InputStream remoteInputStream) {
61 this.fcpConnection = fcpConnection;
62 this.remoteInputStream = remoteInputStream;
70 FcpMessage fcpMessage = null;
71 Throwable throwable = null;
79 String line = readLine();
80 logger.log(Level.FINEST, String.format("read line: %1$s", line));
82 throwable = new EOFException();
85 if (line.length() == 0) {
89 if (fcpMessage == null) {
90 fcpMessage = new FcpMessage(line);
93 if ("EndMessage".equalsIgnoreCase(line) || "Data".equalsIgnoreCase(line)) {
94 fcpConnection.handleMessage(fcpMessage);
97 int equalSign = line.indexOf('=');
98 if (equalSign == -1) {
99 /* something's fishy! */
102 String field = line.substring(0, equalSign);
103 String value = line.substring(equalSign + 1);
104 assert fcpMessage != null: "fcp message is null";
105 fcpMessage.setField(field, value);
106 } catch (IOException ioe1) {
111 fcpConnection.handleDisconnect(throwable);
115 * Stops the connection handler.
118 synchronized (this) {
128 * Reads bytes from {@link #remoteInputStream} until ‘\r’ or ‘\n’ are
129 * encountered and decodes the read bytes using UTF-8.
131 * @return The decoded line
132 * @throws IOException
133 * if an I/O error occurs
135 private String readLine() throws IOException {
136 byte[] readBytes = new byte[512];
139 int nextByte = remoteInputStream.read();
140 if (nextByte == -1) {
141 if (readIndex == 0) {
146 if (nextByte == 10) {
147 if (!ignoreNextLinefeed) {
151 ignoreNextLinefeed = false;
152 if (nextByte == 13) {
153 ignoreNextLinefeed = true;
156 if (readIndex == readBytes.length) {
157 /* recopy & enlarge array */
158 byte[] newReadBytes = new byte[readBytes.length * 2];
159 System.arraycopy(readBytes, 0, newReadBytes, 0, readBytes.length);
160 readBytes = newReadBytes;
162 readBytes[readIndex++] = (byte) nextByte;
164 ByteBuffer byteBuffer = ByteBuffer.wrap(readBytes, 0, readIndex);
165 return Charset.forName("UTF-8").decode(byteBuffer).toString();