-
Notifications
You must be signed in to change notification settings - Fork 2
/
Server.java
598 lines (535 loc) · 18.7 KB
/
Server.java
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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
/**
* ChatServer - Server class
* @author Waterlgndx
* 05/20/2012
* Server is a class that hosts the chat. I admit it is probably a bit messy. I also find it strange that I
* ended up using an Array of ThreadHandlers instead of a hash of some sort. I would like to use a hash for
* commands or command aliases I would like to add ServerObjects which users would be able to interact with
* and set behavior/properties via the command aliases developed. But this may be much further down the road.
*
* classes: Server, ThreadHandler
*/
package net.dreamersnet.ChatServer;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
/**
* ThreadHandler : a class that handles threads for the sockets for connected user. These threads handle
* incoming and outgoing messages with regards to the users connected.
* @author Ben Parker
*/
class ThreadHandler extends Thread {
Socket socket;
Server serv;
String userName = new String(" ");
String message = new String (" ");
boolean terminated = false;
int n; //Thread Number
ThreadHandler(Server serv, Socket s, int v) {
this.serv = serv;
socket = s;
n= v;
}
//TODO: Change so that the Server side completely manages the user name after connection...
public void run()
{
try {
// prime the loop and get user name and get client added to the server...
//Read incoming message. In future versions it will not be important
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
message = bufferedReader.readLine();
if (message.isEmpty()) {
this.terminate();
return;
}
if ((message.indexOf("!#@") >= 0) && (message.indexOf("!#@") < 4)) { //this might now be deprecated
String[] tmp = message.split("!#@",2);
message = tmp[1];
String[] tmp2 = message.split(" ",2);
userName = tmp2[0];
message = tmp2[1];
serv.sendCommand(userName, message);
} else if ((message.indexOf("+++") >= 0) && (message.indexOf("+++") <4)) {
String[] tmp = message.split(" ",2);
userName = tmp[1];
serv.sendRawToAll("*** JOINED: " + userName + " is now connected and chatting!");
} else {
String[] tmp = message.split(" ",2);
userName = tmp[0];
message = tmp[1];
if (message.length() > 0)
{
System.out.println("<" + userName + "> " + message);
//Respond to client echoing back the incoming client message
serv.sendToAll(this, message);
}
}
//add me
serv.addMe(this);
// continue execution as normal...
while (!terminated) {
//Read incoming message. In future versions it will not be important
bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
message = bufferedReader.readLine();
if ((message.indexOf("!#@") >= 0) && (message.indexOf("!#@") < 4)) { //this might now be deprecated
String[] tmp = message.split("!#@",2);
message = tmp[1];
String[] tmp2 = message.split(" ",2);
userName = tmp2[0];
message = tmp2[1];
serv.sendCommand(userName, message);
} else if ((message.indexOf("[#]") >= 0) && (message.indexOf("[#]") < 4)) {
String[] tmp = message.split(" ", 2);
userName = tmp[1];
serv.sendRawNames(userName);
} else {
String[] tmp = message.split(" ",2);
userName = tmp[0];
message = tmp[1];
if (message.length() > 0)
{
System.out.println("<" + userName + "> " + message);
//Respond to client echoing back the incoming client message
serv.sendToAll(this, message);
}
}
}
} catch (IOException e) {
Date d = new Date();
System.out.println(d + ">> ThreadHandler exception occured : " + e);
e.printStackTrace();
System.out.println("Closing socket");
try {
terminate();
socket.close();
} catch (Exception e2) {
System.out.println("Close socket failed" + e);
}
return;
}
}
public Socket getSocket()
{
return socket;
}
public void closeSocket()
{
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void setSocket(Socket s) {
socket = s;
}
public synchronized void sendMessage(String from, String msg)
{
if (terminated) return;
try {
PrintWriter printWriter = new PrintWriter(socket.getOutputStream(),true);
if (msg.length() > 0) {
printWriter.println("<" + from + "> " + msg);
printWriter.flush();
}
} catch (IOException e) {
System.out.println("Message not sent, exception : " + e);
System.out.println("Closing socket and attempting recovery");
try {
serv.sendRawToAll(userName + " had their connection reset! ");
socket.close();
serv.removeThread(this);
terminated = true;
} catch (Exception e2) {
System.out.println("Close socket failed" + e);
}
return;
}
}
//TODO: boolean setSocket() if host names match.
public void setUserName(String newUserName)
{
this.userName = newUserName;
sendRaw("@#!set name " + this.userName);
}
public String getUserName()
{
return userName;
}
public void sendRaw(String raw)
{
if (terminated) return;
try {
PrintWriter printWriter = new PrintWriter(socket.getOutputStream(),true);
if (raw.length() > 0) {
printWriter.println(raw);
printWriter.flush();
}
} catch (IOException e) {
System.out.println("Raw not sent, exception : " + e);
System.out.println("Closing socket and attempting recovery");
try {
socket.close();
serv.removeThread(this);
terminated = true;
} catch (Exception e2) {
System.out.println("Close socket failed: " + e);
}
return;
}
}
public boolean equals(ThreadHandler th) {
return (socket.getInetAddress().toString().compareToIgnoreCase(th.getSocket().getInetAddress().toString())==0);
}
public boolean isClosed()
{
return socket.isClosed();
}
public void terminate()
{
terminated = true;
try {
socket.close();
serv.removeThread(this);
serv.sendRawNamesAll();
} catch ( Exception e) {
System.out.println("Error terminating socket for " + userName + ": "+ e);
}
try {
serv.sendRawToAll(userName + " lost connection! ");
serv.sendRawNamesAll();
} catch (Exception e) {
System.out.println("Error sending message for "+ userName +": " + e);
}
}
public void terminateT()
{
terminated = true;
serv.removeThread(this);
serv.sendRawNamesAll();
return;
}
}
public class Server {
static HashMap<String, ServerObject> sobj = new HashMap<String, ServerObject>();
static HashMap<String, ThreadHandler> threads = new HashMap<String, ThreadHandler>();
static ArrayList<ThreadHandler> noCXNt = new ArrayList<ThreadHandler>(); //non connected threads
static Server serv = new Server();
public static void main(String[] args) {
int nreq = 1;
try {
@SuppressWarnings("resource")
ServerSocket serverSocket = new ServerSocket(5999);
System.out.println("Server is now listening from " + serverSocket.getInetAddress().toString() + " on " + serverSocket.getLocalPort());
for (;;) {
Socket socket = serverSocket.accept();
Thread t = new ThreadHandler(serv, socket, ++nreq);
t.start();
noCXNt.add((ThreadHandler) t);
}
} catch (IOException e) {
System.out.println("exception occured : " + e);
System.exit(-1);
}
}
public synchronized void addMe(Thread t) {
ArrayList<Thread> toRemove = new ArrayList<Thread>();
ThreadHandler newThread = (ThreadHandler) t; //new thread
String attemptName = newThread.getUserName();
threads.forEach((userName, th) -> {
if (th.isClosed())
toRemove.add(th);
});
if (threads.containsKey(attemptName))
{
System.out.println(attemptName + " is currently in use.");
//match found terminate session with reason.
ThreadHandler oldThread = threads.get(attemptName.toLowerCase()); //old thread
if (newThread.equals(oldThread)) {
// if addresses match replace old session
newThread.sendMessage("SERVER", "This name is in use, but your host matches, replacing session.");
oldThread.sendMessage("SERVER", "We believe you have been a ghosted user, killing your session.");
oldThread.setSocket(newThread.getSocket());
serv.removeThread(newThread); //set the socket so we don't need newThread any more.
System.out.println("Username "+ attemptName + " is a duplicated nickname from host: "+ newThread.getSocket().getInetAddress().getHostName());
System.out.println("Server detected the host to be a match from it's previous connection so has replaced the connection with the current one");
noCXNt.remove(newThread);
return;
} else {
newThread.sendMessage("SERVER", "This name is in use!!! You will be disconnected!!");
newThread.sendMessage("SERVER", "This name is in use!!! You will be disconnected!!");
//TODO: change it so client is given a chance to change their name
newThread.terminate();
System.out.println("Username "+ attemptName + " is a duplicated nickname from host: "+ newThread.getSocket().getInetAddress().getHostName());
System.out.println("Original host is " + oldThread.getSocket().getInetAddress().getHostName());
noCXNt.remove(newThread);
return;
}
}
threads.put(newThread.getUserName().toLowerCase(), newThread);
noCXNt.remove(newThread);
newThread.sendMessage("SERVER", "Welcome to home.dreamersnet.net!");
newThread.sendMessage("SERVER", "This is an experiemental chat server!");
for (int i=0; i<toRemove.size();i++)
removeThread(toRemove.get(i));
newThread.sendMessage("SERVER", "Just added : /create <obj> <desc> ; /look [item] ; /destroy <ownObject> ");
newThread.sendMessage("SERVER", "If you see a name with [PM] that indicates it is a private message");
newThread.sendMessage("SERVER", "Supported Commands: /me /emote /msg /tell /t /create /destroy /look /help /nickname /nick /?");
sendRawToAll("*** JOINED: " + newThread.getUserName() + " is now connected and is chatting!");
}
public synchronized void sendToAll(Thread t, String msg)
{
String from = ((ThreadHandler) t).getUserName();
//send same message to everyone
if (msg.length() > 0) { //can't send an empty message!
threads.forEach((userName, th) -> {
if (!th.isClosed())
th.sendMessage(from,msg);
});
} //TODO:error?
}
public synchronized void sendToAll(String from, String msg)
{
threads.forEach((userName, th) -> {
if (!th.isClosed())
th.sendMessage(from,msg);
});
}
public synchronized void sendRawToAll(String raw)
{
threads.forEach((userName, th) -> {
if (!th.isClosed())
th.sendRaw(raw);
});
}
public synchronized void removeThread(Thread t)
{
threads.remove(t);
}
private synchronized void sendNamesTo(String from) {
String toSend = new String();
int nameCt = 0;
from = from.toLowerCase();
if (threads.containsKey(from))
{
ThreadHandler thFrom = threads.get(from.toLowerCase());
if (thFrom.isClosed())
return;
//create list of users
String[] users = new String[threads.size()];
users = threads.keySet().toArray(users);
for (String user:users){
if (threads.get(user.toLowerCase()).isClosed())
continue;
toSend += " " + threads.get(user.toLowerCase()).getUserName();
nameCt++;
}
thFrom.sendRaw("* There are "+ nameCt + " users logged in : " + toSend);
}
}
public synchronized void sendRawNames(String from) {
String toSend = new String();
from = from.toLowerCase();
if (threads.containsKey(from))
{
ThreadHandler thFrom = threads.get(from.toLowerCase());
if (thFrom.isClosed())
return;
//create list of users
String[] users = new String[threads.size()];
users = threads.keySet().toArray(users);
for (String user:users){
if (threads.get(user.toLowerCase()).isClosed())
continue;
toSend += " " + threads.get(user.toLowerCase()).getUserName();
}
thFrom.sendRaw("[#] " + toSend);
}
}
public synchronized void sendRawNamesAll() {
String toSend = new String();
//create list of users
String[] users = new String[threads.size()];
users = threads.keySet().toArray(users);
for (String user:users){
if (threads.get(user.toLowerCase()).isClosed())
continue;
toSend += " " + threads.get(user.toLowerCase()).getUserName();
}
serv.sendRawToAll("[#] " + toSend);
}
public synchronized void createObject(String itemName, String from, String desc )
{
ServerObject so = new ServerObject(this, itemName, from, desc) ;
sendRawToAll(from + " created " + itemName + " (" + desc + ") ");
sobj.put(itemName, so);
}
public synchronized void sendCommand(String from, String command)
{
// Make sure to return after performing the actions required for your command!
// NAMES, WHO command are currently the same thing
if ((command.compareToIgnoreCase("names")== 0) || (command.compareToIgnoreCase("who")==0)) {
sendNamesTo(from);
return;
}
// ?, HELP commands
if ((command.compareToIgnoreCase("help")==0) || (command.compareTo("?")==0)) {
ThreadHandler userThread = threads.get(from.toLowerCase());
if (userThread != null)
{
userThread.sendRaw("The following commands are available:");
userThread.sendRaw("ACTION: /me <text> (alias: /emote)");
userThread.sendRaw("PRIVATE MESSAGE: /msg <nickname> <msg> (alias: /t, /tell)");
userThread.sendRaw("HELP: /help (alias: /?)");
userThread.sendRaw("CREATE OBJECT: /create <object> <description>");
userThread.sendRaw("DESTROY OBJECT: /destroy <ownObject> ");
userThread.sendRaw("LOOK (all or item): /look [item]");
userThread.sendRaw("CHANGE NICKNAME: /nickname <newName> (alias /nick);");
userThread.sendRaw("Note: <parameter> , [optional parameter] ");
}
return;
}
// QUIT command
if (command.compareToIgnoreCase("quit")==0) {
ThreadHandler userThread = threads.get(from.toLowerCase());
if ( userThread != null ) {
sendRawToAll("*** Client exiting : " + from);
userThread.terminate();
userThread.closeSocket();
threads.remove(from);
}
return;
}
if (command.compareToIgnoreCase("look")==0) {
final ThreadHandler userThread = threads.get(from.toLowerCase());
if (sobj.isEmpty())
userThread.sendRaw("No items yet!");
if (userThread != null ) {
sobj
.forEach((k, so) -> userThread.sendRaw(so.getName() +
"..." + so.getDesc() + "..." + so.getStat()));
}
return;
}
//Multiple parameter commands:
String[] words = command.split(" ", 3);
// CREATE command
if (words[0].compareToIgnoreCase("create")==0) {
createObject(words[1], from, words[2]);
return;
}
// Get desc
if (words[0].compareToIgnoreCase("look")==0)
{
ServerObject so = sobj.get(words[1]);
ThreadHandler userThread = threads.get(from.toLowerCase());
if (so == null && userThread != null) {
userThread.sendRaw("No such object!");
} else if (userThread != null) {
userThread.sendRaw("You inspect " + so.getName() + " it is " + so.getDesc() );
}
return;
}
if (words[0].compareToIgnoreCase("destroy")==0) {
ServerObject so = sobj.get(words[1]);
ThreadHandler userThread = threads.get(from.toLowerCase());
if (so.getCreator().compareToIgnoreCase(from)==0) {
sobj.remove(words[1]);
this.sendRawToAll("Object " + words[1] + " removed.");
} else {
userThread.sendRaw(so.getName() + " doesn't listen to you!");
}
return;
}
if (words[0].compareToIgnoreCase("stats")==0)
{
ServerObject so = sobj.get(words[1]);
ThreadHandler userThread = threads.get(from.toLowerCase());
if (userThread != null) {
userThread.sendRaw("You inspect " + so.getName() + " it is " + so.getDesc() );
userThread.sendRaw("Further inspection reveals its stats...");
userThread.sendRaw(so.getStat());
}
return;
}
// QUIT with parameters
if (words[0].compareToIgnoreCase("quit")==0) {
ThreadHandler userThread = threads.get(from.toLowerCase());
if ( userThread != null ) {
if (words.length==2)
sendRawToAll("*** Client exiting : " + from + " with reason : " + words[1]);
else
sendRawToAll("*** Client exiting : " + from + " with reason : " + words[1] + " " + words[2]);
userThread.terminate();
threads.remove(from);
}
return;
}
// NICK, NICKNAME command
if ((words[0].compareToIgnoreCase("nickname")==0)||(words[0].compareToIgnoreCase("nick")==0)) {
boolean newNickOk = true;
ThreadHandler userThread = threads.get(from.toLowerCase());
String[] users = new String[threads.size()];
users = threads.keySet().toArray(users);
String attemptName = words[1];
if (attemptName.compareToIgnoreCase(from)==0) {
userThread.setUserName(attemptName);
sendRawToAll("*** "+ from + " is now known as " + attemptName);
return;
}
if (threads.containsKey(attemptName.toLowerCase()) && (attemptName.compareToIgnoreCase(from)!=0))
newNickOk=false;
if ((newNickOk) && (userThread != null)) {
//change nick and let everyone know
userThread.setUserName(attemptName);
threads.put(userThread.getUserName().toLowerCase(), userThread);
threads.remove(from.toLowerCase());
sendRawToAll("*** "+ from + " is now known as " + words[1]);
} else if (!newNickOk) {
userThread.sendRaw("Nickname changed failed! It appears it is already in use!");
} else {
System.out.println("Error no user found: "+ from);
}
return;
}
// MSG , TELL commands (many of my friends are ex-mmo players, adding these for ease)
else if ((words[0].compareToIgnoreCase("msg")== 0) || (words[0].compareToIgnoreCase("tell")== 0) || (words[0].compareToIgnoreCase("t")==0)) {
boolean sent = false;
ThreadHandler fromUser = threads.get(from.toLowerCase());
if (threads.containsKey(words[1].toLowerCase())) {
threads.get(words[1].toLowerCase()).sendMessage("[PM] "+ from, words[2]);
sent = true;
} else if (fromUser!= null){
fromUser.sendRaw("User " + words[1] + " not found");
}
if ((fromUser != null) && sent) {
fromUser.sendMessage("Sent PM["+ words[1] + "]", ": " + words[2]);
}
return;
}
// ME , EMOTE commands
else if ((words[0].compareToIgnoreCase("me")== 0) || (words[0].compareToIgnoreCase("emote")== 0)) {
String tmp="";
for (int i=1; i<words.length; i++)
tmp += words[i] + " ";
sendRawToAll("ACTION: * " + from + " "+ tmp.trim());
}
else {
try {
System.out.println("Unknown command raw: " + command);
System.out.println("words[0]:" + words[0]);
System.out.println("words[1]:" + words[1]);
System.out.println("words[2]:" + words[2]);
} catch (Exception e) {
System.out.println("server sendCommand exception: " + e);
}
}
}
}