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
|
"======================================================================
|
| NNTP protocol support
|
|
======================================================================"
"======================================================================
|
| Based on code copyright (c) Kazuki Yasumatsu, and in the public domain
| Copyright (c) 2002 Free Software Foundation, Inc.
| Adapted by Paolo Bonzini.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
|
| The GNU Smalltalk class library 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 Lesser
| General Public License for more details.
|
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LIB.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02111-1307, USA.
|
======================================================================"
Namespace current: NetClients.NNTP!
NetClient subclass: #NNTPClient
instanceVariableNames: 'currentGroup '
classVariableNames: ''
poolDictionaries: ''
category: 'NetClients-NNTP'!
NNTPClient comment:
'
Copyright (c) Kazuki Yasumatsu, 1995. All rights reserved.
'!
NetProtocolInterpreter subclass: #NNTPProtocolInterpreter
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'NetClients-NNTP'!
NNTPProtocolInterpreter comment:
'
Copyright (c) Kazuki Yasumatsu, 1995. All rights reserved.
'!
!NNTPClient class methodsFor: 'examples'!
exampleHelpOn: host
"self exampleHelpOn: 'localhost'."
| client answer |
client := NNTPProtocolInterpreter connectToHost: host.
[answer := client help.
client logout.
] ensure: [client close].
^answer!
exampleOn: host group: groupString
"self exampleOn: 'newshost' group: 'comp.lang.smalltalk'."
| subjects client |
client := NNTPProtocolInterpreter host: host.
[| range |
range := client activeArticlesInGroup: groupString.
subjects := Array new: range size.
client
subjectsOf: groupString
from: range first
to: range last
do: [:n :subject | subjects add: subject].
client logout.
] ensure: [client close].
subjects inspect.! !
!NNTPClient methodsFor: 'accessing'!
activeArticlesInGroup: groupString
"Answer an active article range in group."
| response read from to |
self connectIfClosed.
response := self clientPI nntpGroup: groupString.
currentGroup := groupString.
response status = 211 ifFalse: [^0 to: 0].
"A response is as follows:"
"211 n f l s (n = estimated number of articles in group,
f = first article number in the group,
l = last article number in the group,
s = name of the group.)"
read := response statusMessage readStream.
read skipSeparators.
Integer readFrom: read.
read skipSeparators.
from := Integer readFrom: read.
read skipSeparators.
to := Integer readFrom: read.
^from to: to!
activeNewsgroupsDo: aBlock
"Answer a list of active newsgroups."
| line |
self reconnect.
self clientPI nntpList.
[self atEnd or:
[line := self nextLine.
line = '.']] whileFalse:
[aBlock value: line]!
activeNewsgroups
"Answer a list of active newsgroups."
| stream |
stream := WriteStream on: (Array new).
self activeNewsgroupsDo: [ :each | stream nextPut: each ].
^stream contents!
articleAt: idOrNumberString into: aStream
"Read an article at idOrNumberString into aStream."
self connectIfClosed.
self clientPI nntpArticle: idOrNumberString.
self receiveMessageUntilPeriodInto: aStream!
articleAtNumber: anInteger group: groupString into: aStream
"Read an article at anInteger of a newsgroup named groupString into aStream."
self connectIfClosed.
groupString = currentGroup ifFalse: [self group: groupString].
self articleAt: anInteger printString into: aStream!
articleMessageAt: idOrNumberString
"Answer a message of an article at idOrNumberString."
self connectIfClosed.
self clientPI nntpArticle: idOrNumberString.
^MIME.MimeEntity readFrom: self!
articleMessageAtNumber: anInteger group: groupString
"Answer a message of an article at anInteger of a newsgroup named groupString."
self connectIfClosed.
groupString = currentGroup ifFalse: [self group: groupString].
^self articleMessageAt: anInteger printString.!
bodyAt: idOrNumberString into: aStream
"Read a body of an article at idOrNumberString into aStream."
| response |
self connectIfClosed.
self clientPI nntpBody: idOrNumberString.
self receiveMessageUntilPeriodInto: aStream!
bodyAtNumber: anInteger group: groupString into: aStream
"Read a body of an article at anInteger of a newsgroup named groupString into aStream."
self connectIfClosed.
groupString = currentGroup ifFalse: [self group: groupString].
^self bodyAt: anInteger printString into: aStream!
connectToHost: host port: port
currentGroup := nil.
super connectToHost: host port: port!
group: groupString
self connectIfClosed.
self clientPI nntpGroup: groupString.
currentGroup := groupString.!
headAt: idOrNumberString into: aStream
"Read a header of an article at idOrNumberString into aStream."
self connectIfClosed.
self clientPI nntpHead: idOrNumberString.
self receiveMessageUntilPeriodInto: aStream!
headAtNumber: anInteger group: groupString into: aStream
"Read a header of an article at anInteger of a newsgroup named groupString into aStream."
self connectIfClosed.
groupString = currentGroup ifFalse: [self group: groupString].
^self headAt: anInteger printString into: aStream!
help
"Answer a help text."
| write |
write := WriteStream on: (String new: 1024).
self connectIfClosed.
self clientPI nntpHelp.
self receiveMessageUntilPeriodInto: write.
^write contents!
postArticleMessage: aMessage
"Post a news article message."
self connectIfClosed.
self clientPI nntpPost: [ aMessage printMessageOnClient: self ]!
postArticleStream: aStream
"Post a news article in aStream."
self connectIfClosed.
self clientPI nntpPost: [ self sendMessageWithPeriod: aStream ]!
logout
self closed ifTrue: [^self].
self clientPI nntpQuit.
self close! !
!NNTPClient methodsFor: 'private'!
protocolInterpreter
^NNTPProtocolInterpreter! !
!NNTPClient methodsFor: 'extended accessing'!
headersAt: keyString group: groupString from: from to: to do: aBlock
"Answer a list of article number and value of header field in a range (from to)."
| line |
self connectIfClosed.
groupString = currentGroup ifFalse: [self group: groupString].
self clientPI nntpXhdr: keyString from: from to: to.
[self atEnd or:
[line := self nextLine.
line = '.']] whileFalse:
[| read number string |
read := line readStream.
read skipSeparators.
number := Integer readFrom: read.
read skipSeparators.
string := read upToEnd.
aBlock value: number value: string]!
headersAt: keyString group: groupString from: from to: to into: aStream
"Answer a list of article number and value of header field in a range (from to)."
self connectIfClosed.
groupString = currentGroup ifFalse: [self group: groupString].
self clientPI nntpXhdr: keyString from: from to: to.
self receiveMessageUntilPeriodInto: aStream!
messageIdsOf: groupString from: from to: to do: aBlock
^self headersAt: 'MESSAGE-ID' group: groupString from: from to: to do: aBlock!
messageIdsOf: groupString from: from to: to into: aStream
^self headersAt: 'MESSAGE-ID' group: groupString from: from to: to into: aStream!
overviewsOf: groupString from: from to: to do: aBlock
"Answer a list of article number and overview of header field in a range (from to)."
| line |
self connectIfClosed.
groupString = currentGroup ifFalse: [self group: groupString].
self clientPI nntpXoverFrom: from to: to.
[self atEnd or:
[line := self nextLine.
line = '.']] whileFalse:
[| read number string |
read := line readStream.
read skipSeparators.
number := Integer readFrom: read.
read skipSeparators.
string := read upToEnd.
aBlock value: number value: string]!
overviewsOf: groupString from: from to: to into: aStream
"Answer a list of article number and overview of header field in a range (from to)."
self connectIfClosed.
groupString = currentGroup ifFalse: [self group: groupString].
self clientPI nntpXoverFrom: from to: to.
self receiveMessageUntilPeriodInto: aStream!
subjectsOf: groupString from: from to: to do: aBlock
^self headersAt: 'SUBJECT' group: groupString from: from to: to do: aBlock!
subjectsOf: groupString from: from to: to into: aStream
^self headersAt: 'SUBJECT' group: groupString from: from to: to into: aStream!
xrefsOf: groupString from: from to: to do: aBlock
^self headersAt: 'XREF' group: groupString from: from to: to do: aBlock!
xrefsOf: groupString from: from to: to into: aStream
^self headersAt: 'XREF' group: groupString from: from to: to into: aStream! !
!NNTPProtocolInterpreter class methodsFor: 'api'!
defaultPortNumber
^119!
!NNTPProtocolInterpreter methodsFor: 'connection'!
connect
super connect.
"Skip first general response."
self checkResponse: self getResponse.
"Set mode to reader for INN."
self nextPutAll: 'MODE READER'; cr.
"Ignore error"
self checkResponse: self getResponse ifError: [].! !
!NNTPProtocolInterpreter methodsFor: 'nntp protocol'!
nntpArticle: idOrNumberString
| response |
self nextPutAll: ('ARTICLE ', idOrNumberString); cr.
response := self getResponse.
response status = 220 "article retrieved - head and body follows"
ifFalse: [^self checkResponse: response]!
nntpBody: idOrNumberString
| response |
self nextPutAll: ('BODY ', idOrNumberString); cr.
response := self getResponse.
response status = 222 "article retrieved - body follows"
ifFalse: [^self checkResponse: response]!
nntpGroup: groupString
| response |
self nextPutAll: ('GROUP ', groupString); cr.
response := self getResponse.
self checkResponse: response.
^response!
nntpHead: idOrNumberString
| response |
self nextPutAll: ('HEAD ', idOrNumberString); cr.
response := self getResponse.
response status = 221 "article retrieved - head follows"
ifFalse: [^self checkResponse: response]!
nntpHelp
self nextPutAll: 'HELP'; cr.
self checkResponseForFollowingText: self getResponse!
nntpList
self nextPutAll: 'LIST'; cr.
self checkResponseForFollowingText: self getResponse!
nntpPost: aBlock
self nextPutAll: 'POST'; cr.
self checkResponse: self getResponse.
aBlock value.
self checkResponse: self getResponse.!
nntpQuit
self nextPutAll: 'QUIT'; cr.
self checkResponse: self getResponse!
nntpXhdr: keyString from: from to: to
"Answer a list of article number and value of header field in a range (from to)."
self nextPutAll: ('XHDR ', keyString, ' ', from printString, '-', to printString); cr.
self checkResponseForFollowingText: self getResponse!
nntpXoverFrom: from to: to
"Answer a list of article number and overview of header field in a range (from to)."
self nextPutAll: ('XOVER ', from printString, '-', to printString); cr.
self checkResponseForFollowingText: self getResponse! !
!NNTPProtocolInterpreter methodsFor: 'private'!
checkResponse: response
| textFollows |
textFollows := self
checkResponse: response
ifError: [self protocolError: response statusMessage. false].
textFollows ifFalse: [^self].
self skipMessageUntilPeriod.
^self protocolError: 'Unexpected reply: ', response statusMessage.!
checkResponse: response ifError: errorBlock
"Answer text follows or not."
| status |
status := response status.
"Timeout after 7200 seconds, closing connection"
status = 503 ifTrue: [^self connectionClosedError: response statusMessage].
"Informative message"
status = 100 "help text follows" ifTrue: [^true].
(status between: 190 and: 199) "debug output" ifTrue: [^false].
"Command ok"
status = 200 "server ready - posting allowed" ifTrue: [^false].
status = 201 "server ready - no posting allowed" ifTrue: [^false].
status = 202 "slave status noted" ifTrue: [^false].
status = 205 "closing connection - goodbye!" ifTrue: [^false].
status = 211 "n f l s group selected" ifTrue: [^false].
"### n f l s (n = estimated number of articles in group,
f = first article number in the group,
l = last article number in the group,
s = name of the group.)"
status = 215 "list of newsgroups follows" ifTrue: [^true].
"### n <a> (n = article number, <a> = message-id)"
status = 220 "article retrieved - head and body follows" ifTrue: [^true].
status = 221 "article retrieved - head follows" ifTrue: [^true].
status = 222 "article retrieved - body follows" ifTrue: [^true].
status = 223 "article retrieved - request text separately" ifTrue: [^true].
status = 224 "data follows" ifTrue: [^true].
status = 230 "list of new articles by message-id follows" ifTrue: [^true].
status = 231 "list of new newsgroups follows" ifTrue: [^true].
status = 235 "article transferred ok" ifTrue: [^false].
status = 240 "article posted ok" ifTrue: [^false].
"Command ok so far, send the rest of it"
status = 335 "send article to be transferred" ifTrue: [^false].
status = 340 "send article to be posted" ifTrue: [^false].
"Command was correct, but couldn't be performed for some reason"
status = 400 "service discontinued" ifTrue: [^errorBlock value].
status = 411 "no such news group" ifTrue: [^errorBlock value].
status = 412 "no newsgroup has been selected" ifTrue: [^errorBlock value].
status = 420 "no current article has been selected" ifTrue: [^errorBlock value].
status = 421 "no next article in this group" ifTrue: [^errorBlock value].
status = 422 "no previous article in this group" ifTrue: [^errorBlock value].
status = 423 "no such article number in this group" ifTrue: [^errorBlock value].
status = 430 "no such article found" ifTrue: [^errorBlock value].
status = 435 "article not wanted - do not send it" ifTrue: [^errorBlock value].
status = 436 "transfer failed - try again later" ifTrue: [^errorBlock value].
status = 437 "article rejected - do not try again." ifTrue: [^errorBlock value].
status = 440 "posting not allowed" ifTrue: [^errorBlock value].
status = 441 "posting failed" ifTrue: [^errorBlock value].
"Command unimplemented, or incorrect, or a serious program error occurred"
status = 500 "command not recognized" ifTrue: [^errorBlock value].
status = 501 "command syntax error" ifTrue: [^errorBlock value].
status = 502 "access restriction or permission denied" ifTrue: [^errorBlock value].
status = 503 "program fault - command not performed" ifTrue: [^errorBlock value].
"Unknown status"
^errorBlock value!
checkResponseForFollowingText: response
| textFollows |
textFollows := self
checkResponse: response
ifError: [self protocolError: response statusMessage. false].
textFollows
ifFalse: [^self protocolError: 'Unexpected reply: ', response statusMessage].! !
!NNTPProtocolInterpreter methodsFor: 'private-attributes'!
defaultPortNumber
^119!
liveAcrossSnapshot
^true! !
!NNTPProtocolInterpreter methodsFor: 'stream accessing'!
nextPutAll: aString
| retryCount |
aString isEmpty ifTrue: [^self].
retryCount := 0.
[connectionStream nextPutAll: (self encode: aString)]
on: Error
do: [:ex |
(retryCount := retryCount + 1) > 1
ifTrue: [ex return]
ifFalse: [self reconnect. ex restart]]! !
Namespace current: Smalltalk!
|
