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05328297 | 1 | ;;; NNTP (RFC977) Interface for GNU Emacs |
2 | ;; Copyright (C) 1987, 1988, 1989 Fujitsu Laboratories LTD. | |
3 | ;; Copyright (C) 1987, 1988, 1989, 1990 Masanobu UMEDA | |
4 | ;; $Header: nntp.el,v 3.10 90/03/23 13:25:27 umerin Locked $ | |
5 | ||
6 | ;; This file is part of GNU Emacs. | |
7 | ||
8 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
9 | ;; but WITHOUT ANY WARRANTY. No author or distributor | |
10 | ;; accepts responsibility to anyone for the consequences of using it | |
11 | ;; or for whether it serves any particular purpose or works at all, | |
12 | ;; unless he says so in writing. Refer to the GNU Emacs General Public | |
13 | ;; License for full details. | |
14 | ||
15 | ;; Everyone is granted permission to copy, modify and redistribute | |
16 | ;; GNU Emacs, but only under the conditions described in the | |
17 | ;; GNU Emacs General Public License. A copy of this license is | |
18 | ;; supposed to have been given to you along with GNU Emacs so you | |
19 | ;; can know your rights and responsibilities. It should be in a | |
20 | ;; file named COPYING. Among other things, the copyright notice | |
21 | ;; and this notice must be preserved on all copies. | |
22 | ||
23 | ;; This implementation is tested on both 1.2a and 1.5 version of the | |
24 | ;; NNTP package. | |
25 | ||
26 | ;; Troubleshooting of NNTP | |
27 | ;; | |
28 | ;; (1) Select routine may signal an error or fall into infinite loop | |
29 | ;; while waiting for the server response. In this case, you'd better | |
30 | ;; not use byte-compiled codes but original source. If you still have | |
31 | ;; a problems with it, set the variable `nntp-buggy-select' to T. | |
32 | ;; | |
33 | ;; (2) Emacs may hang up while retrieving headers since too many | |
34 | ;; requests have been sent to the NNTP server without reading their | |
35 | ;; replies. In this case, reduce the number of the requests sent to | |
36 | ;; the server at one time by setting the variable | |
37 | ;; `nntp-maximum-request' to a lower value. | |
38 | ;; | |
39 | ;; (3) If the TCP/IP stream (open-network-stream) is not supported by | |
40 | ;; emacs, compile and install `tcp.el' and `tcp.c' which is an | |
41 | ;; emulation program of the stream. If you modified `tcp.c' for your | |
42 | ;; system, please send me the diffs. I'll include some of them in the | |
43 | ;; future releases. | |
44 | ||
05328297 | 45 | (defvar nntp-server-hook nil |
46 | "*Hooks for the NNTP server. | |
47 | If the kanji code of the NNTP server is different from the local kanji | |
48 | code, the correct kanji code of the buffer associated with the NNTP | |
49 | server must be specified as follows: | |
50 | ||
51 | (setq nntp-server-hook | |
52 | '(lambda () | |
53 | ;; Server's Kanji code is EUC (NEmacs hack). | |
54 | (make-local-variable 'kanji-fileio-code) | |
55 | (setq kanji-fileio-code 0))) | |
56 | ||
57 | If you'd like to change something depending on the server in this | |
58 | hook, use the variable `nntp-server-name'.") | |
59 | ||
60 | (defvar nntp-buggy-select (memq system-type '(usg-unix-v fujitsu-uts)) | |
61 | "*T if your select routine is buggy. | |
62 | If the select routine signals error or fall into infinite loop while | |
63 | waiting for the server response, the variable must be set to t. In | |
64 | case of Fujitsu UTS, it is set to T since `accept-process-output' | |
65 | doesn't work properly.") | |
66 | ||
67 | (defvar nntp-maximum-request 400 | |
68 | "*The maximum number of the requests sent to the NNTP server at one time. | |
69 | If Emacs hangs up while retrieving headers, set the variable to a | |
70 | lower value.") | |
71 | ||
72 | (defvar nntp-large-newsgroup 50 | |
73 | "*The number of the articles which indicates a large newsgroup. | |
74 | If the number of the articles is greater than the value, verbose | |
75 | messages will be shown to indicate the current status.") | |
76 | ||
77 | \f | |
78 | (defconst nntp-version "NNTP 3.10" | |
79 | "Version numbers of this version of NNTP.") | |
80 | ||
81 | (defvar nntp-server-name nil | |
82 | "The name of the host running NNTP server.") | |
83 | ||
84 | (defvar nntp-server-buffer nil | |
85 | "Buffer associated with NNTP server process.") | |
86 | ||
87 | (defvar nntp-server-process nil | |
88 | "The NNTP server process. | |
89 | You'd better not use this variable in NNTP front-end program but | |
90 | instead use `nntp-server-buffer'.") | |
91 | ||
92 | (defvar nntp-status-message-string nil | |
93 | "Save the server response message. | |
94 | You'd better not use this variable in NNTP front-end program but | |
95 | instead call function `nntp-status-message' to get status message.") | |
96 | ||
97 | ;;; | |
98 | ;;; Extended Command for retrieving many headers. | |
99 | ;;; | |
100 | ;; Retrieving lots of headers by sending command asynchronously. | |
101 | ;; Access functions to headers are defined as macro. | |
102 | ||
103 | (defmacro nntp-header-number (header) | |
104 | "Return article number in HEADER." | |
105 | (` (aref (, header) 0))) | |
106 | ||
107 | (defmacro nntp-set-header-number (header number) | |
108 | "Set article number of HEADER to NUMBER." | |
109 | (` (aset (, header) 0 (, number)))) | |
110 | ||
111 | (defmacro nntp-header-subject (header) | |
112 | "Return subject string in HEADER." | |
113 | (` (aref (, header) 1))) | |
114 | ||
115 | (defmacro nntp-set-header-subject (header subject) | |
116 | "Set article subject of HEADER to SUBJECT." | |
117 | (` (aset (, header) 1 (, subject)))) | |
118 | ||
119 | (defmacro nntp-header-from (header) | |
120 | "Return author string in HEADER." | |
121 | (` (aref (, header) 2))) | |
122 | ||
123 | (defmacro nntp-set-header-from (header from) | |
124 | "Set article author of HEADER to FROM." | |
125 | (` (aset (, header) 2 (, from)))) | |
126 | ||
127 | (defmacro nntp-header-xref (header) | |
128 | "Return xref string in HEADER." | |
129 | (` (aref (, header) 3))) | |
130 | ||
131 | (defmacro nntp-set-header-xref (header xref) | |
132 | "Set article xref of HEADER to xref." | |
133 | (` (aset (, header) 3 (, xref)))) | |
134 | ||
135 | (defmacro nntp-header-lines (header) | |
136 | "Return lines in HEADER." | |
137 | (` (aref (, header) 4))) | |
138 | ||
139 | (defmacro nntp-set-header-lines (header lines) | |
140 | "Set article lines of HEADER to LINES." | |
141 | (` (aset (, header) 4 (, lines)))) | |
142 | ||
143 | (defmacro nntp-header-date (header) | |
144 | "Return date in HEADER." | |
145 | (` (aref (, header) 5))) | |
146 | ||
147 | (defmacro nntp-set-header-date (header date) | |
148 | "Set article date of HEADER to DATE." | |
149 | (` (aset (, header) 5 (, date)))) | |
150 | ||
151 | (defmacro nntp-header-id (header) | |
152 | "Return Id in HEADER." | |
153 | (` (aref (, header) 6))) | |
154 | ||
155 | (defmacro nntp-set-header-id (header id) | |
156 | "Set article Id of HEADER to ID." | |
157 | (` (aset (, header) 6 (, id)))) | |
158 | ||
159 | (defmacro nntp-header-references (header) | |
160 | "Return references in HEADER." | |
161 | (` (aref (, header) 7))) | |
162 | ||
163 | (defmacro nntp-set-header-references (header ref) | |
164 | "Set article references of HEADER to REF." | |
165 | (` (aset (, header) 7 (, ref)))) | |
166 | ||
167 | (defun nntp-retrieve-headers (sequence) | |
168 | "Return list of article headers specified by SEQUENCE of article id. | |
169 | The format of list is | |
170 | `([NUMBER SUBJECT FROM XREF LINES DATE MESSAGE-ID REFERENCES] ...)'. | |
171 | Reader macros for the vector are defined as `nntp-header-FIELD'. | |
172 | Writer macros for the vector are defined as `nntp-set-header-FIELD'. | |
173 | News group must be selected before calling me." | |
174 | (save-excursion | |
175 | (set-buffer nntp-server-buffer) | |
176 | (erase-buffer) | |
177 | (let ((number (length sequence)) | |
178 | (last-point (point-min)) | |
179 | (received 0) | |
180 | (count 0) | |
181 | (headers nil) ;Result list. | |
182 | (article 0) | |
183 | (subject nil) | |
184 | (message-id) | |
185 | (from nil) | |
186 | (xref nil) | |
187 | (lines 0) | |
188 | (date nil) | |
189 | (references nil)) | |
190 | ;; Send HEAD command. | |
191 | (while sequence | |
192 | (nntp-send-strings-to-server "HEAD" (car sequence)) | |
193 | (setq sequence (cdr sequence)) | |
194 | (setq count (1+ count)) | |
195 | ;; Every 400 header requests we have to read stream in order | |
196 | ;; to avoid deadlock. | |
197 | (if (or (null sequence) ;All requests have been sent. | |
198 | (zerop (% count nntp-maximum-request))) | |
199 | (progn | |
200 | (accept-process-output) | |
201 | (while (progn | |
202 | (goto-char last-point) | |
203 | ;; Count replies. | |
204 | (while (re-search-forward "^[0-9]" nil t) | |
205 | (setq received (1+ received))) | |
206 | (setq last-point (point)) | |
207 | (< received count)) | |
208 | ;; If number of headers is greater than 100, give | |
209 | ;; informative messages. | |
210 | (and (numberp nntp-large-newsgroup) | |
211 | (> number nntp-large-newsgroup) | |
212 | (zerop (% received 20)) | |
213 | (message "NNTP: %d%% of headers received." | |
214 | (/ (* received 100) number))) | |
215 | (nntp-accept-response)) | |
216 | )) | |
217 | ) | |
218 | ;; Wait for text of last command. | |
219 | (goto-char (point-max)) | |
220 | (re-search-backward "^[0-9]" nil t) | |
221 | (if (looking-at "^[23]") | |
222 | (while (progn | |
223 | (goto-char (- (point-max) 3)) | |
224 | (not (looking-at "^\\.\r$"))) | |
225 | (nntp-accept-response))) | |
226 | (and (numberp nntp-large-newsgroup) | |
227 | (> number nntp-large-newsgroup) | |
228 | (message "NNTP: 100%% of headers received.")) | |
229 | ;; Now all of replies are received. | |
230 | (setq received number) | |
231 | ;; First, fold continuation lines. | |
232 | (goto-char (point-min)) | |
233 | (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t) | |
234 | (replace-match " " t t)) | |
235 | ;;(delete-non-matching-lines | |
236 | ;; "^Subject:\\|^Xref:\\|^From:\\|^Lines:\\|^Date:\\|^References:\\|^[23]") | |
237 | (and (numberp nntp-large-newsgroup) | |
238 | (> number nntp-large-newsgroup) | |
239 | (message "NNTP: Parsing headers...")) | |
240 | ;; Then examines replies. | |
241 | (goto-char (point-min)) | |
242 | (while (not (eobp)) | |
243 | (cond ((looking-at "^[23][0-9][0-9][ \t]+\\([0-9]+\\)[ \t]+\\(<[^>]+>\\)") | |
244 | (setq article | |
245 | (string-to-int | |
246 | (buffer-substring (match-beginning 1) (match-end 1)))) | |
247 | (setq message-id | |
248 | (buffer-substring (match-beginning 2) (match-end 2))) | |
249 | (forward-line 1) | |
250 | ;; Set default value. | |
251 | (setq subject nil) | |
252 | (setq xref nil) | |
253 | (setq from nil) | |
254 | (setq lines 0) | |
255 | (setq date nil) | |
256 | (setq references nil) | |
257 | ;; Thanks go to mly@AI.MIT.EDU (Richard Mlynarik) | |
258 | (while (and (not (eobp)) | |
259 | (not (memq (following-char) '(?2 ?3)))) | |
260 | (if (looking-at "\\(From\\|Subject\\|Date\\|Lines\\|Xref\\|References\\):[ \t]+\\([^ \t\n]+.*\\)\r$") | |
261 | (let ((s (buffer-substring | |
262 | (match-beginning 2) (match-end 2))) | |
263 | (c (char-after (match-beginning 0)))) | |
264 | ;; We don't have to worry about letter case. | |
265 | (cond ((char-equal c ?F) ;From: | |
266 | (setq from s)) | |
267 | ((char-equal c ?S) ;Subject: | |
268 | (setq subject s)) | |
269 | ((char-equal c ?D) ;Date: | |
270 | (setq date s)) | |
271 | ((char-equal c ?L) ;Lines: | |
272 | (setq lines (string-to-int s))) | |
273 | ((char-equal c ?X) ;Xref: | |
274 | (setq xref s)) | |
275 | ((char-equal c ?R) ;References: | |
276 | (setq references s)) | |
277 | ))) | |
278 | (forward-line 1)) | |
279 | ;; Finished to parse one header. | |
280 | (if (null subject) | |
281 | (setq subject "(None)")) | |
282 | (if (null from) | |
283 | (setq from "(Unknown User)")) | |
284 | (setq headers | |
285 | (cons (vector article subject from | |
286 | xref lines date | |
287 | message-id references) headers)) | |
288 | ) | |
289 | (t (forward-line 1)) | |
290 | ) | |
291 | (setq received (1- received)) | |
292 | (and (numberp nntp-large-newsgroup) | |
293 | (> number nntp-large-newsgroup) | |
294 | (zerop (% received 20)) | |
295 | (message "NNTP: Parsing headers... %d%%" | |
296 | (/ (* received 100) number))) | |
297 | ) | |
298 | (and (numberp nntp-large-newsgroup) | |
299 | (> number nntp-large-newsgroup) | |
300 | (message "NNTP: Parsing headers... done")) | |
301 | (nreverse headers) | |
302 | ))) | |
303 | ||
304 | \f | |
305 | ;;; | |
306 | ;;; Raw Interface to Network News Transfer Protocol (RFC977). | |
307 | ;;; | |
308 | ||
309 | (defun nntp-open-server (host &optional service) | |
310 | "Open news server on HOST. | |
311 | If HOST is nil, use value of environment variable `NNTPSERVER'. | |
312 | If optional argument SERVICE is non-nil, open by the service name." | |
313 | (let ((host (or host (getenv "NNTPSERVER"))) | |
314 | (status nil)) | |
315 | (setq nntp-status-message-string "") | |
316 | (cond ((and host (nntp-open-server-internal host service)) | |
317 | (setq status (nntp-wait-for-response "^[23].*\r$")) | |
318 | ;; Do check unexpected close of connection. | |
319 | ;; Suggested by feldmark@hanako.stars.flab.fujitsu.junet. | |
320 | (if status | |
321 | (set-process-sentinel nntp-server-process | |
322 | 'nntp-default-sentinel) | |
323 | ;; We have to close connection here, since function | |
324 | ;; `nntp-server-opened' may return incorrect status. | |
325 | (nntp-close-server-internal) | |
326 | )) | |
327 | ((null host) | |
328 | (setq nntp-status-message-string "NNTP server is not specified.")) | |
329 | ) | |
330 | status | |
331 | )) | |
332 | ||
333 | (defun nntp-close-server () | |
334 | "Close news server." | |
335 | (unwind-protect | |
336 | (progn | |
337 | ;; Un-set default sentinel function before closing connection. | |
338 | (and nntp-server-process | |
339 | (eq 'nntp-default-sentinel | |
340 | (process-sentinel nntp-server-process)) | |
341 | (set-process-sentinel nntp-server-process nil)) | |
342 | ;; We cannot send QUIT command unless the process is running. | |
343 | (if (nntp-server-opened) | |
344 | (nntp-send-command nil "QUIT")) | |
345 | ) | |
346 | (nntp-close-server-internal) | |
347 | )) | |
348 | ||
349 | (fset 'nntp-request-quit (symbol-function 'nntp-close-server)) | |
350 | ||
351 | (defun nntp-server-opened () | |
352 | "Return server process status, T or NIL. | |
353 | If the stream is opened, return T, otherwise return NIL." | |
354 | (and nntp-server-process | |
355 | (memq (process-status nntp-server-process) '(open run)))) | |
356 | ||
357 | (defun nntp-status-message () | |
358 | "Return server status response as string." | |
359 | (if (and nntp-status-message-string | |
360 | ;; NNN MESSAGE | |
361 | (string-match "[0-9][0-9][0-9][ \t]+\\([^\r]*\\).*$" | |
362 | nntp-status-message-string)) | |
363 | (substring nntp-status-message-string (match-beginning 1) (match-end 1)) | |
364 | ;; Empty message if nothing. | |
365 | "" | |
366 | )) | |
367 | ||
368 | (defun nntp-request-article (id) | |
369 | "Select article by message ID (or number)." | |
370 | (prog1 | |
371 | ;; If NEmacs, end of message may look like: "\256\215" (".^M") | |
372 | (nntp-send-command "^\\.\r$" "ARTICLE" id) | |
373 | (nntp-decode-text) | |
374 | )) | |
375 | ||
376 | (defun nntp-request-body (id) | |
377 | "Select article body by message ID (or number)." | |
378 | (prog1 | |
379 | ;; If NEmacs, end of message may look like: "\256\215" (".^M") | |
380 | (nntp-send-command "^\\.\r$" "BODY" id) | |
381 | (nntp-decode-text) | |
382 | )) | |
383 | ||
384 | (defun nntp-request-head (id) | |
385 | "Select article head by message ID (or number)." | |
386 | (prog1 | |
387 | (nntp-send-command "^\\.\r$" "HEAD" id) | |
388 | (nntp-decode-text) | |
389 | )) | |
390 | ||
391 | (defun nntp-request-stat (id) | |
392 | "Select article by message ID (or number)." | |
393 | (nntp-send-command "^[23].*\r$" "STAT" id)) | |
394 | ||
395 | (defun nntp-request-group (group) | |
396 | "Select news GROUP." | |
397 | ;; 1.2a NNTP's group command is buggy. "^M" (\r) is not appended to | |
398 | ;; end of the status message. | |
399 | (nntp-send-command "^[23].*$" "GROUP" group)) | |
400 | ||
401 | (defun nntp-request-list () | |
402 | "List valid newsgoups." | |
403 | (prog1 | |
404 | (nntp-send-command "^\\.\r$" "LIST") | |
405 | (nntp-decode-text) | |
406 | )) | |
407 | ||
408 | (defun nntp-request-last () | |
a0963566 | 409 | "Set current article pointer to the previous article in the current news group." |
05328297 | 410 | (nntp-send-command "^[23].*\r$" "LAST")) |
411 | ||
412 | (defun nntp-request-next () | |
413 | "Advance current article pointer." | |
414 | (nntp-send-command "^[23].*\r$" "NEXT")) | |
415 | ||
416 | (defun nntp-request-post () | |
417 | "Post a new news in current buffer." | |
418 | (if (nntp-send-command "^[23].*\r$" "POST") | |
419 | (progn | |
420 | (nntp-encode-text) | |
421 | (nntp-send-region-to-server (point-min) (point-max)) | |
422 | ;; 1.2a NNTP's post command is buggy. "^M" (\r) is not | |
423 | ;; appended to end of the status message. | |
424 | (nntp-wait-for-response "^[23].*$") | |
425 | ))) | |
426 | ||
427 | (defun nntp-default-sentinel (proc status) | |
428 | "Default sentinel function for NNTP server process." | |
429 | (if (and nntp-server-process | |
430 | (not (nntp-server-opened))) | |
431 | (error "NNTP: Connection closed.") | |
432 | )) | |
433 | ||
434 | ;; Encoding and decoding of NNTP text. | |
435 | ||
436 | (defun nntp-decode-text () | |
437 | "Decode text transmitted by NNTP. | |
438 | 0. Delete status line. | |
439 | 1. Delete `^M' at end of line. | |
440 | 2. Delete `.' at end of buffer (end of text mark). | |
441 | 3. Delete `.' at beginning of line." | |
442 | (save-excursion | |
443 | (set-buffer nntp-server-buffer) | |
444 | ;; Insert newline at end of buffer. | |
445 | (goto-char (point-max)) | |
446 | (if (not (bolp)) | |
447 | (insert "\n")) | |
448 | ;; Delete status line. | |
449 | (goto-char (point-min)) | |
450 | (delete-region (point) (progn (forward-line 1) (point))) | |
451 | ;; Delete `^M' at end of line. | |
452 | ;; (replace-regexp "\r$" "") | |
453 | (while (not (eobp)) | |
454 | (end-of-line) | |
455 | (if (= (preceding-char) ?\r) | |
456 | (delete-char -1)) | |
457 | (forward-line 1) | |
458 | ) | |
459 | ;; Delete `.' at end of buffer (end of text mark). | |
460 | (goto-char (point-max)) | |
461 | (forward-line -1) ;(beginning-of-line) | |
462 | (if (looking-at "^\\.$") | |
463 | (delete-region (point) (progn (forward-line 1) (point)))) | |
464 | ;; Replace `..' at beginning of line with `.'. | |
465 | (goto-char (point-min)) | |
466 | ;; (replace-regexp "^\\.\\." ".") | |
467 | (while (search-forward "\n.." nil t) | |
468 | (delete-char -1)) | |
469 | )) | |
470 | ||
471 | (defun nntp-encode-text () | |
472 | "Encode text in current buffer for NNTP transmission. | |
473 | 1. Insert `.' at beginning of line. | |
474 | 2. Insert `.' at end of buffer (end of text mark)." | |
475 | (save-excursion | |
476 | ;; Insert newline at end of buffer. | |
477 | (goto-char (point-max)) | |
478 | (if (not (bolp)) | |
479 | (insert "\n")) | |
480 | ;; Replace `.' at beginning of line with `..'. | |
481 | (goto-char (point-min)) | |
482 | ;; (replace-regexp "^\\." "..") | |
483 | (while (search-forward "\n." nil t) | |
484 | (insert ".")) | |
485 | ;; Insert `.' at end of buffer (end of text mark). | |
486 | (goto-char (point-max)) | |
487 | (insert ".\n") | |
488 | )) | |
489 | ||
490 | \f | |
491 | ;;; | |
492 | ;;; Synchronous Communication with NNTP Server. | |
493 | ;;; | |
494 | ||
495 | (defun nntp-send-command (response cmd &rest args) | |
496 | "Wait for server RESPONSE after sending CMD and optional ARGS to server." | |
497 | (save-excursion | |
498 | ;; Clear communication buffer. | |
499 | (set-buffer nntp-server-buffer) | |
500 | (erase-buffer) | |
501 | (apply 'nntp-send-strings-to-server cmd args) | |
502 | (if response | |
503 | (nntp-wait-for-response response) | |
504 | t) | |
505 | )) | |
506 | ||
507 | (defun nntp-wait-for-response (regexp) | |
508 | "Wait for server response which matches REGEXP." | |
509 | (save-excursion | |
510 | (let ((status t) | |
511 | (wait t)) | |
512 | (set-buffer nntp-server-buffer) | |
513 | ;; Wait for status response (RFC977). | |
514 | ;; 1xx - Informative message. | |
515 | ;; 2xx - Command ok. | |
516 | ;; 3xx - Command ok so far, send the rest of it. | |
517 | ;; 4xx - Command was correct, but couldn't be performed for some | |
518 | ;; reason. | |
519 | ;; 5xx - Command unimplemented, or incorrect, or a serious | |
520 | ;; program error occurred. | |
521 | (nntp-accept-response) | |
522 | (while wait | |
523 | (goto-char (point-min)) | |
524 | (cond ((looking-at "[23]") | |
525 | (setq wait nil)) | |
526 | ((looking-at "[45]") | |
527 | (setq status nil) | |
528 | (setq wait nil)) | |
529 | (t (nntp-accept-response)) | |
530 | )) | |
531 | ;; Save status message. | |
532 | (end-of-line) | |
533 | (setq nntp-status-message-string | |
534 | (buffer-substring (point-min) (point))) | |
535 | (if status | |
536 | (progn | |
537 | (setq wait t) | |
538 | (while wait | |
539 | (goto-char (point-max)) | |
540 | (forward-line -1) ;(beginning-of-line) | |
541 | ;;(message (buffer-substring | |
542 | ;; (point) | |
543 | ;; (save-excursion (end-of-line) (point)))) | |
544 | (if (looking-at regexp) | |
545 | (setq wait nil) | |
546 | (message "NNTP: Reading...") | |
547 | (nntp-accept-response) | |
548 | (message "") | |
549 | )) | |
550 | ;; Successfully received server response. | |
551 | t | |
552 | )) | |
553 | ))) | |
554 | ||
555 | \f | |
556 | ;;; | |
557 | ;;; Low-Level Interface to NNTP Server. | |
558 | ;;; | |
559 | ||
560 | (defun nntp-send-strings-to-server (&rest strings) | |
561 | "Send list of STRINGS to news server as command and its arguments." | |
562 | (let ((cmd (car strings)) | |
563 | (strings (cdr strings))) | |
564 | ;; Command and each argument must be separeted by one or more spaces. | |
565 | (while strings | |
566 | (setq cmd (concat cmd " " (car strings))) | |
567 | (setq strings (cdr strings))) | |
568 | ;; Command line must be terminated by a CR-LF. | |
569 | (process-send-string nntp-server-process (concat cmd "\n")) | |
570 | )) | |
571 | ||
572 | (defun nntp-send-region-to-server (begin end) | |
573 | "Send current buffer region (from BEGIN to END) to news server." | |
574 | (save-excursion | |
575 | ;; We have to work in the buffer associated with NNTP server | |
576 | ;; process because of NEmacs hack. | |
577 | (copy-to-buffer nntp-server-buffer begin end) | |
578 | (set-buffer nntp-server-buffer) | |
579 | (setq begin (point-min)) | |
580 | (setq end (point-max)) | |
581 | ;; `process-send-region' does not work if text to be sent is very | |
582 | ;; large. I don't know maximum size of text sent correctly. | |
583 | (let ((last nil) | |
584 | (size 100)) ;Size of text sent at once. | |
585 | (save-restriction | |
586 | (narrow-to-region begin end) | |
587 | (goto-char begin) | |
588 | (while (not (eobp)) | |
589 | ;;(setq last (min end (+ (point) size))) | |
590 | ;; NEmacs gets confused if character at `last' is Kanji. | |
591 | (setq last (save-excursion | |
592 | (goto-char (min end (+ (point) size))) | |
593 | (or (eobp) (forward-char 1)) ;Adjust point | |
594 | (point))) | |
595 | (process-send-region nntp-server-process (point) last) | |
596 | ;; I don't know whether the next codes solve the known | |
597 | ;; problem of communication error of GNU Emacs. | |
598 | (accept-process-output) | |
599 | ;;(sit-for 0) | |
600 | (goto-char last) | |
601 | ))) | |
602 | ;; We cannot erase buffer, because reply may be received. | |
603 | (delete-region begin end) | |
604 | )) | |
605 | ||
606 | (defun nntp-open-server-internal (host &optional service) | |
607 | "Open connection to news server on HOST by SERVICE (default is nntp)." | |
608 | (save-excursion | |
609 | ;; Use TCP/IP stream emulation package if needed. | |
610 | (or (fboundp 'open-network-stream) | |
611 | (require 'tcp)) | |
612 | ;; Initialize communication buffer. | |
613 | (setq nntp-server-buffer (get-buffer-create " *nntpd*")) | |
614 | (set-buffer nntp-server-buffer) | |
615 | (buffer-flush-undo (current-buffer)) | |
616 | (erase-buffer) | |
617 | (kill-all-local-variables) | |
618 | (setq case-fold-search t) ;Should ignore case. | |
619 | (setq nntp-server-process | |
620 | (open-network-stream "nntpd" (current-buffer) | |
621 | host (or service "nntp"))) | |
622 | (setq nntp-server-name host) | |
623 | ;; It is possible to change kanji-fileio-code in this hook. | |
624 | (run-hooks 'nntp-server-hook) | |
625 | ;; Return the server process. | |
626 | nntp-server-process | |
627 | )) | |
628 | ||
629 | (defun nntp-close-server-internal () | |
630 | "Close connection to news server." | |
631 | (if nntp-server-process | |
632 | (delete-process nntp-server-process)) | |
633 | (if nntp-server-buffer | |
634 | (kill-buffer nntp-server-buffer)) | |
635 | (setq nntp-server-buffer nil) | |
636 | (setq nntp-server-process nil)) | |
637 | ||
638 | (defun nntp-accept-response () | |
639 | "Read response of server. | |
640 | It is well-known that the communication speed will be much improved by | |
641 | defining this function as macro." | |
642 | ;; To deal with server process exiting before | |
643 | ;; accept-process-output is called. | |
644 | ;; Suggested by Jason Venner <jason@violet.berkeley.edu>. | |
645 | ;; This is a copy of `nntp-default-sentinel'. | |
646 | (or (memq (process-status nntp-server-process) '(open run)) | |
647 | (error "NNTP: Connection closed.")) | |
648 | (if nntp-buggy-select | |
649 | (progn | |
650 | ;; We cannot use `accept-process-output'. | |
651 | ;; Fujitsu UTS requires messages during sleep-for. I don't know why. | |
652 | (message "NNTP: Reading...") | |
653 | (sleep-for 1) | |
654 | (message "")) | |
655 | (condition-case errorcode | |
656 | (accept-process-output nntp-server-process) | |
657 | (error | |
658 | (cond ((string-equal "select error: Invalid argument" (nth 1 errorcode)) | |
659 | ;; Ignore select error. | |
660 | nil | |
661 | ) | |
662 | (t | |
663 | (signal (car errorcode) (cdr errorcode)))) | |
664 | )) | |
665 | )) | |
49116ac0 JB |
666 | |
667 | (provide 'nntp) | |
668 |