1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.net.*;
import java.io.*;
import java.util.ArrayList;
/**
* This class implements a simple FTP server that can handle multiple
* connections concurrently. This is mostly meant as a test environment.
* You have to provide 2 handlers for it to be effective, one to simulate
* (or access) a filesystem and one to deal with authentication.
* See {@link FtpFileSystemHandler} and {@link FtpAuthHandler}.
*
* Since it is a subclass of Thread, you have to call <code>start()</code>
* To get it running.
*
* Usage example:<p>
*
* <code>
* FtpServer server = new FtpServer(0);
* int port = server.getLocalPort();
* server.setFileSystemHandler(myFSHandler);
* server.setAuthHandler(myAuthHandler);
* server.start();
* </code>
*
*/
public class FtpServer extends Thread {
private ServerSocket listener = null;
private FtpFileSystemHandler fsh = null;
private FtpAuthHandler auth = null;
private boolean done = false;
private ArrayList<FtpCommandHandler> clients = new ArrayList<FtpCommandHandler>();
/**
* Creates an instance of an FTP server which will listen for incoming
* connections on the specified port. If the port is set to 0, it will
* automatically select an available ephemeral port.
*/
public FtpServer(int port) throws IOException {
listener = new ServerSocket(port);
}
/**
* Creates an instance of an FTP server that will listen on the default
* FTP port, usually 21.
*/
public FtpServer() throws IOException {
this(21);
}
public void setFileSystemHandler(FtpFileSystemHandler f) {
fsh = f;
}
public void setAuthHandler(FtpAuthHandler a) {
auth = a;
}
public void terminate() {
done = true;
interrupt();
}
public void killClients() {
synchronized (clients) {
int c = clients.size();
while (c > 0) {
c--;
FtpCommandHandler cl = clients.get(c);
cl.terminate();
cl.interrupt();
}
}
}
public int getLocalPort() {
return listener.getLocalPort();
}
void addClient(Socket client) {
FtpCommandHandler h = new FtpCommandHandler(client, this);
h.setHandlers(fsh, auth);
synchronized (clients) {
clients.add(h);
}
h.start();
}
void removeClient(FtpCommandHandler cl) {
synchronized (clients) {
clients.remove(cl);
}
}
public int activeClientsCount() {
synchronized (clients) {
return clients.size();
}
}
public void run() {
Socket client;
try {
while (!done) {
client = listener.accept();
addClient(client);
}
listener.close();
} catch (IOException e) {
}
}
}
|
