[919] | 1 | /**
|
---|
| 2 | * ImageServer.java
|
---|
| 3 | * Copyright (C) 2010 New Zealand Digital Library, http://expeditee.org
|
---|
| 4 | *
|
---|
| 5 | * This program is free software: you can redistribute it and/or modify
|
---|
| 6 | * it under the terms of the GNU General Public License as published by
|
---|
| 7 | * the Free Software Foundation, either version 3 of the License, or
|
---|
| 8 | * (at your option) any later version.
|
---|
| 9 | *
|
---|
| 10 | * This program is distributed in the hope that it will be useful,
|
---|
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 13 | * GNU General Public License for more details.
|
---|
| 14 | *
|
---|
| 15 | * You should have received a copy of the GNU General Public License
|
---|
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
|
---|
| 17 | */
|
---|
| 18 |
|
---|
[838] | 19 | package org.expeditee.network;
|
---|
| 20 |
|
---|
| 21 | import java.io.File;
|
---|
| 22 | import java.io.FileInputStream;
|
---|
| 23 | import java.io.IOException;
|
---|
| 24 | import java.io.InputStream;
|
---|
[843] | 25 | import java.io.OutputStream;
|
---|
[838] | 26 | import java.net.ServerSocket;
|
---|
| 27 | import java.net.Socket;
|
---|
| 28 |
|
---|
| 29 | import org.expeditee.gui.FrameIO;
|
---|
| 30 |
|
---|
| 31 | public class ImageServer extends DefaultServer {
|
---|
| 32 |
|
---|
[843] | 33 | public static void sendImage(File file, Socket socket) throws IOException {
|
---|
[881] | 34 | if(!file.isFile()) {
|
---|
| 35 | System.out.println("Could not find " + file.getName());
|
---|
| 36 | return;
|
---|
| 37 | }
|
---|
[843] | 38 | OutputStream os = socket.getOutputStream();
|
---|
| 39 | // send the file over the socket
|
---|
| 40 | int fileLen = (int) file.length();
|
---|
| 41 | System.out.println("Sending " + file.getName() + " (" + fileLen + " bytes)");
|
---|
| 42 | byte[] fileLenBytes = new byte[4];
|
---|
| 43 | fileLenBytes[0] = (byte) ((fileLen >> 24) & 0xFF);
|
---|
| 44 | fileLenBytes[1] = (byte) ((fileLen >> 16) & 0xFF);
|
---|
| 45 | fileLenBytes[2] = (byte) ((fileLen >> 8) & 0xFF);
|
---|
| 46 | fileLenBytes[3] = (byte) ((fileLen) & 0xFF);
|
---|
| 47 | os.write(fileLenBytes);
|
---|
| 48 | FileInputStream in = new FileInputStream(file);
|
---|
| 49 | byte[] buf = null;
|
---|
| 50 | if(in.available() > 1024) {
|
---|
| 51 | buf = new byte[1024];
|
---|
| 52 | while(in.available() > 1024) {
|
---|
| 53 | in.read(buf);
|
---|
| 54 | os.write(buf);
|
---|
| 55 | }
|
---|
| 56 | }
|
---|
| 57 | buf = new byte[in.available()];
|
---|
| 58 | in.read(buf);
|
---|
| 59 | os.write(buf);
|
---|
| 60 | os.flush();
|
---|
| 61 | in.close();
|
---|
| 62 | }
|
---|
| 63 |
|
---|
[838] | 64 | /**
|
---|
| 65 | * Reads an image request, and sends the image back if it was found
|
---|
| 66 | *
|
---|
| 67 | * @author jts21
|
---|
| 68 | *
|
---|
| 69 | */
|
---|
| 70 | private static class ImageSender extends Thread {
|
---|
| 71 |
|
---|
[843] | 72 | private Socket socket;
|
---|
[838] | 73 |
|
---|
| 74 | public ImageSender(Socket client) {
|
---|
| 75 | super("ImageSender");
|
---|
[843] | 76 | this.socket = client;
|
---|
[838] | 77 | }
|
---|
| 78 |
|
---|
| 79 | @Override
|
---|
| 80 | public void run() {
|
---|
| 81 | try {
|
---|
[843] | 82 | InputStream is = this.socket.getInputStream();
|
---|
| 83 | // file name length is the first byte
|
---|
| 84 | int fileNameLen = is.read();
|
---|
| 85 | if(fileNameLen <= 0)
|
---|
| 86 | return;
|
---|
[838] | 87 | // file name is the remaining bytes of the stream, encoded in UTF-8
|
---|
| 88 | byte[] fileName = new byte[fileNameLen];
|
---|
| 89 | is.read(fileName);
|
---|
[856] | 90 | sendImage(new File(FrameIO.IMAGES_PATH + new String(fileName, FrameShare.CHARSET)), socket);
|
---|
[843] | 91 | this.socket.close();
|
---|
[838] | 92 | } catch (IOException e) {
|
---|
| 93 | e.printStackTrace();
|
---|
| 94 | }
|
---|
| 95 | }
|
---|
| 96 | }
|
---|
| 97 |
|
---|
| 98 | public final static int OFFSET = 5;
|
---|
| 99 |
|
---|
| 100 | private ServerSocket socket;
|
---|
| 101 |
|
---|
| 102 | public ImageServer(int port) throws IOException {
|
---|
| 103 | super("ImageServer");
|
---|
| 104 | this.socket = new ServerSocket(port + OFFSET);
|
---|
| 105 | }
|
---|
| 106 |
|
---|
| 107 | @Override
|
---|
| 108 | protected void listenForMessages() throws IOException {
|
---|
| 109 | Socket client = socket.accept();
|
---|
| 110 | // should probably only allow a limited number of threads here
|
---|
| 111 | new ImageSender(client).start();
|
---|
| 112 | }
|
---|
| 113 |
|
---|
| 114 | @Override
|
---|
[878] | 115 | protected void closeSocket() {
|
---|
| 116 | try {
|
---|
| 117 | socket.close();
|
---|
| 118 | } catch (IOException e) {
|
---|
| 119 | e.printStackTrace();
|
---|
[838] | 120 | }
|
---|
| 121 | }
|
---|
| 122 |
|
---|
| 123 | }
|
---|